title: sh_MI_D1_2_25

data_processing:
Raw sequencing reads from single-cardiomyocyte RNA sequencing libraries were trimmed to remove adapter sequences and low-quality bases using fastp-0.20.038 with the parameters “--cut_tail --cut_tail_window_size 10 --cut_tail_mean_quality 30 --length_required 355”.
ReadCounts file generated using featureCounts.

extract_protocol:
Cardiomyocytes were isolated using Langendorff perfusion from the left ventricle as previously described. Enzymatic dissociation using Langendorff perfusion was performed with 35 mL enzyme solution (type 2 collagenase 1 mg/mL [Worthington], protease type XIV 0.05 mg/mL [Sigma-Aldrich], NaCl 130 mM, KCl 5.4 mM, MgCl2 0.5 mM, NaH2PO4 0.33 mM, D-glucose 22 mM, HEPES 25 mM; pH 7.4) pre-heated to 37 °C, at a rate of 3 mL/min. To neutralize enzymatic activity, fetal bovine serum (FBS) was added to the solution to a final concentration of 0.2% (v/v). After perfusion of digestion buffer, left ventricle was cut according to each sectional region (IR, RR) and cardiomyocytes were subsequently isolated. Cell suspensions were filtered through a 100-μm nylon mesh cell strainer and centrifuged at 100 g for 2 min, after which the supernatant was discarded. To prevent hypercontraction, the cardiomyocytes were resuspended in medium (NaCl 130 mM, KCl 5.4 mM, MgCl2 0.5 mM, NaH2PO4 0.33 mM, D-glucose 22 mM, HEPES 25 mM, FBS 0.2%; pH 7.4) containing a low concentration of calcium (0.1 mM). Rod-shaped live cardiomyocytes (viability of cardiomyocytes was ≥80% for all time points) were collected immediately with a 0.2–2-µL pipette (sample volume, 0.5 µL) and incubated in lysis buffer.
Single-cardiomyocyte cDNA libraries were generated using the Smart-seq2 protocol26 and the efﬁciency of reverse transcription was assessed by examining the cycle threshold (Ct) values of control genes (Tnnt2) from quantitative real-time polymerase chain reaction (qRT-PCR) using a CFX96 Real-Time PCR Detection System (Bio-Rad), and the distribution of cDNA fragment lengths was assessed using LabChip GX (Perkin Elmer) and/or TapeStation 2200 (Agilent Technologies). The following primer sets were used for qRT-PCR: Tnnt2 mRNA forward: TCCTGGCAGA GAGGAGGAAG; Tnnt2 mRNA reverse: TGCAGGTCGA ACTTCTCAGC. A Ct value of 25 was set as the threshold. The sequencing libraries were subjected to paired-end 51-bp RNA sequencing on a HiSeq 2755 (Illumina) in rapid mode

value: single-cardiomyocyte

value: The clean reads were aligned to the mouse genome (mm10) using STAR (version 2.7.263a)


title: MI_D1_RZ_1_47

status: Public on Jul 25 2022

type: SRA

city: Tokyo

first: Shintaro

last: Yamada

address: 7-3-1, Hongo, Bunkyo-ku

department: Department of Cardiovascular Medicine

country: Japan

institute: The University of Tokyo

description:
Smart-seq2
ReadCounts.xlsx

library_source: transcriptomic

data_processing:
Raw sequencing reads from single-cardiomyocyte RNA sequencing libraries were trimmed to remove adapter sequences and low-quality bases using fastp-0.20.027 with the parameters “--cut_tail --cut_tail_window_size 1 --cut_tail_mean_quality 30 --length_required 30”
The clean reads were aligned to the mouse genome (mm10) using STAR (version 2.7.2b)
The reads aligned to exon were counted using featureCounts
For nonCM RNA-seq, raw data was processed using Cell Ranger (version 4.0.0)
For spatial transcriptome, raw data was processed using Space Ranger (version 1.2.1)
Genome_build: For single-cardiomyocyte RNA-seq, the reference transcript data and the gene annotation file for mouse was downloaded from GENCODE (release 23, https://www.gencodegenes.org/)
Genome_build: For nonCM RNA-seq, the reference transcript data and the gene annotation file for mouse was downloaded from  https://cf.10xgenomics.com/supp/cell-exp/refdata-gex-mm10-2020-A.tar.gz.
Genome_build: For spatial transcrptome, the reference transcript data and the gene annotation file for mouse was downloaded from https://cf.10xgenomics.com/supp/spatial-exp/refdata-gex-mm10-2020-A.tar.gz.
Supplementary_files_format_and_content: ReadCounts file generated using featureCounts.
Supplementary_files_format_and_content: Each barcode.tsv.gz, features.tsv.gz and matrix.mtx.gz files genereted using Cell Ranger or Space Ranger.

molecule: total RNA

organism: Mus musculus

source_name: Cardiomyocyte

growth_protocol: All the animal experiments were approved by the University of Tokyo Ethics Committee for Animal Experiments and strictly adhered to the guidelines for animal experiments of the University of Tokyo (Approved Number P14-106). All of wild type C57BL/6 male mice were purchased from CLEA JAPAN. All mouse were housed in separate cages at a maximum of 6 mice per cage in a specific-pathogen–free, temperature-controlled vivarium under a 12-h light/dark cycle with ad libitum access to food and water.

extract_protocol:
Cardiomyocytes were isolated using Langendorff perfusion from the left ventricle as previously described7. Enzymatic dissociation using Langendorff perfusion was performed with 35 mL enzyme solution (type 2 collagenase 1 mg/mL [Worthington], protease type XIV 0.05 mg/mL [Sigma-Aldrich], NaCl 130 mM, KCl 5.4 mM, MgCl2 0.5 mM, NaH2PO4 0.33 mM, D-glucose 22 mM, HEPES 25 mM; pH 7.4) pre-heated to 37 °C, at a rate of 3 mL/min. To neutralize enzymatic activity, fetal bovine serum (FBS) was added to the solution to a final concentration of 0.2% (v/v). After perfusion of digestion buffer, left ventricle was cut according to each sectional region (IR, RR) and cardiomyocytes were subsequently isolated. Cell suspensions were filtered through a 100-μm nylon mesh cell strainer and centrifuged at 100 g for 2 min, after which the supernatant was discarded. To prevent hypercontraction, the cardiomyocytes were resuspended in medium (NaCl 130 mM, KCl 5.4 mM, MgCl2 0.5 mM, NaH2PO4 0.33 mM, D-glucose 22 mM, HEPES 25 mM, FBS 0.2%; pH 7.4) containing a low concentration of calcium (0.1 mM). Rod-shaped live cardiomyocytes (viability of cardiomyocytes was ≥80% for all time points) were collected immediately with a 0.2–2-µL pipette (sample volume, 0.5 µL) and incubated in lysis buffer.
Single-cardiomyocyte cDNA libraries were generated using the Smart-seq2 protocol26 and the efﬁciency of reverse transcription was assessed by examining the cycle threshold (Ct) values of control genes (Tnnt2) from quantitative real-time polymerase chain reaction (qRT-PCR) using a CFX96 Real-Time PCR Detection System (Bio-Rad), and the distribution of cDNA fragment lengths was assessed using LabChip GX (Perkin Elmer) and/or TapeStation 2200 (Agilent Technologies). The following primer sets were used for qRT-PCR: Tnnt2 mRNA forward: TCCTGGCAGA GAGGAGGAAG; Tnnt2 mRNA reverse: TGCAGGTCGA ACTTCTCAGC. A Ct value of 25 was set as the threshold. The sequencing libraries were subjected to paired-end 51-bp RNA sequencing on a HiSeq 2500 (Illumina) in rapid mode

treatment_protocol: Myocardial infarction (MI) was induced as previously described25. Mice were anaesthetized by inhalation of 2% isoflurane. MI was induced by ligation of the left anterior descending artery. Mice that failed to develop MI or died within one week after the operation were excluded from the analysis.

tag: strain

tag: operation

value: MI day1

tag: region

value: remote

tag: tissue

tag: name in supplementary file


title: MI_D1_RZ_1_46

description:
Smart-seq2
ReadCounts.xlsx


title: NFK1_15

type: genomic

city: Grand Rapids

first: Peter

middle: W

last: Laird

state: MI

address: 333 Bostwick Ave NE

department: Epigenetics

country: USA

institute: Van Andel Institute

hyb_protocol: Bisulfite-converted DNA was amplified, fragmented, and hybridized to Illumina Infinium Human Methylation850k Beadchip using standard Illumina protocol.

scan_protocol: Arrays were imaged using BeadArray Reader (Illumina HiSeq2000) using standard recommended Illumina scanner setting

data_processing: Raw IDATs were processed with R (v4.1.1) package ‘SeSAMe’ with noob background correction, non-linear dye bias correction, and non-detection masking. P-value threshold was set at 0.1. Probe masking was performed using the standard mask list in SeSAMe, including probes that overlap with SNPs and repeat elements.

label: Cy3 and Cy5

molecule: genomic DNA

organism: Homo sapiens

source_name: Foreskin

label_protocol: Cy3 and Cy5

extract_protocol: Frozen cell pellets were thawed and lysed using QIAshredder spin columns (Qiagen).  Genomic DNA was extracted from each sample using the AllPrep DNA/RNA Mini Kit (Qiagen), then stored at -80°C before analysis.

tag: subexperiment

value: Baseline profiling

value: 0 years

value: male

value: Ambient

value: Full

tag: subculture

value: b

tag: growth protocol

value: Keratinocytes were maintained in serum-free human epidermal keratinocyte media on collagen IV-coated dishes. Triplicate cultures derived from the same parent plate or vial obtained from Coriell were maintained in parallel through replicative senescence, which was defined in this study as drastically slowed growth (inability to reach near-confluence at 14 days after previous passage) or viable fraction of cells falling below 60%. Passaging occurred as cells became approximately 90% confluent.


title: sh_MI_D1_2_24

data_processing:
Raw sequencing reads from single-cardiomyocyte RNA sequencing libraries were trimmed to remove adapter sequences and low-quality bases using fastp-0.20.038 with the parameters “--cut_tail --cut_tail_window_size 10 --cut_tail_mean_quality 30 --length_required 354”.
ReadCounts file generated using featureCounts.

extract_protocol:
Cardiomyocytes were isolated using Langendorff perfusion from the left ventricle as previously described. Enzymatic dissociation using Langendorff perfusion was performed with 35 mL enzyme solution (type 2 collagenase 1 mg/mL [Worthington], protease type XIV 0.05 mg/mL [Sigma-Aldrich], NaCl 130 mM, KCl 5.4 mM, MgCl2 0.5 mM, NaH2PO4 0.33 mM, D-glucose 22 mM, HEPES 25 mM; pH 7.4) pre-heated to 37 °C, at a rate of 3 mL/min. To neutralize enzymatic activity, fetal bovine serum (FBS) was added to the solution to a final concentration of 0.2% (v/v). After perfusion of digestion buffer, left ventricle was cut according to each sectional region (IR, RR) and cardiomyocytes were subsequently isolated. Cell suspensions were filtered through a 100-μm nylon mesh cell strainer and centrifuged at 100 g for 2 min, after which the supernatant was discarded. To prevent hypercontraction, the cardiomyocytes were resuspended in medium (NaCl 130 mM, KCl 5.4 mM, MgCl2 0.5 mM, NaH2PO4 0.33 mM, D-glucose 22 mM, HEPES 25 mM, FBS 0.2%; pH 7.4) containing a low concentration of calcium (0.1 mM). Rod-shaped live cardiomyocytes (viability of cardiomyocytes was ≥80% for all time points) were collected immediately with a 0.2–2-µL pipette (sample volume, 0.5 µL) and incubated in lysis buffer.
Single-cardiomyocyte cDNA libraries were generated using the Smart-seq2 protocol26 and the efﬁciency of reverse transcription was assessed by examining the cycle threshold (Ct) values of control genes (Tnnt2) from quantitative real-time polymerase chain reaction (qRT-PCR) using a CFX96 Real-Time PCR Detection System (Bio-Rad), and the distribution of cDNA fragment lengths was assessed using LabChip GX (Perkin Elmer) and/or TapeStation 2200 (Agilent Technologies). The following primer sets were used for qRT-PCR: Tnnt2 mRNA forward: TCCTGGCAGA GAGGAGGAAG; Tnnt2 mRNA reverse: TGCAGGTCGA ACTTCTCAGC. A Ct value of 25 was set as the threshold. The sequencing libraries were subjected to paired-end 51-bp RNA sequencing on a HiSeq 2754 (Illumina) in rapid mode

treatment_protocol: Myocardial infarction (MI) was induced as previously described. Mice were anaesthetized by inhalation of 2% isoflurane. MI was induced by ligation of the left anterior descending artery. Mice that failed to develop MI or died within one week after the operation were excluded from the analysis.

value: MI day1_shCsrp3

value: ishchemic + border

tag: genome build

value: The clean reads were aligned to the mouse genome (mm10) using STAR (version 2.7.262a)


title: NFK1_10

value: a


title: Moon SF 96

city: Lexington

first: Shavahn

middle: C

last: Loux

state: KY

address: 1400 Nicholasville

department: Veterinary Science

institute: University of Kentucky

data_processing:
mapping (STAR 2.7.2a - STAR --outSAMstrandField intronMotif --outFilterIntronMotifs RemoveNoncanonicalU  nannotated --alignEndsType Local --chimOutType WithinBAM --twopassMode Basic --t  wopass1readsN -1 --quantMode GeneCounts --outSAMunmapped Within --outSAMtype BAM   SortedByCoordinate )
quantification (STAR-2.7.2a - GeneCounts - annotation Ensembl v 104)
Normalization (GeTMM via EdgeR; rpk.norm <- DGEList(counts=rpk,group=group)  rpk.norm <- calcNormFactors(rpk.norm)  norm.counts.rpk_edger <- cpm(rpk.norm))
DEG (EdgeR; glmQLFTest)
Genome_build: EquCab3.0
Supplementary_files_format_and_content: GeTMM gene expression values - csv file

organism: Equus caballus

source_name: Bone marrow mononuclear cells

growth_protocol: Samples identified as SF(n,y,z, …i) were cultured in autologous normal equine synovial fluid for up to 10 days

extract_protocol:
Cultured cells were recovered in 10 mM EDTA, centrifuged (12,000g; 10 min; 4°C) and the cell pellet placed in 2 mL guanidinium chloride-phenol (Trizol®, Life Technologies). RNA was purified with on-column DNase digest (DirectZolTM RNA microprep kit, , Zymo Research, I), quantified (Qubit® 3.0 Fluorometer), and stored at -80°C. RNA quality was assessed using a Bioanalyzer 2100, Agilent Technologies, Santa Clara, CA).
cDNA libraries were prepared using TruSeq DNA Library Preparation kits (Illumina, Inc., San Diego, CA).
cDNA libraries were sequenced (NovaSeq 6000 S4, Illumina) to generate an average of 34.5 (range, 24-54) million stranded paired-end reads (2 x 150 nt) per sample

treatment_protocol: Samples identified as ISF(n,y,z, …i) were cultured in autologous inflamed equine synovial fluid for up to 10 days

tag: cell type

value: Bone marrow mononuclear cells

tag: breed

value: Thoroughbred

tag: age

value: Adult

tag: name

value: Moon

tag: Sex

value: Female

tag: type

value: Mare

tag: treatment

tag: time

value: 96 hours


title: sh_MI_D1_2_23

data_processing:
Raw sequencing reads from single-cardiomyocyte RNA sequencing libraries were trimmed to remove adapter sequences and low-quality bases using fastp-0.20.038 with the parameters “--cut_tail --cut_tail_window_size 10 --cut_tail_mean_quality 30 --length_required 353”.
ReadCounts file generated using featureCounts.

extract_protocol:
Cardiomyocytes were isolated using Langendorff perfusion from the left ventricle as previously described. Enzymatic dissociation using Langendorff perfusion was performed with 35 mL enzyme solution (type 2 collagenase 1 mg/mL [Worthington], protease type XIV 0.05 mg/mL [Sigma-Aldrich], NaCl 130 mM, KCl 5.4 mM, MgCl2 0.5 mM, NaH2PO4 0.33 mM, D-glucose 22 mM, HEPES 25 mM; pH 7.4) pre-heated to 37 °C, at a rate of 3 mL/min. To neutralize enzymatic activity, fetal bovine serum (FBS) was added to the solution to a final concentration of 0.2% (v/v). After perfusion of digestion buffer, left ventricle was cut according to each sectional region (IR, RR) and cardiomyocytes were subsequently isolated. Cell suspensions were filtered through a 100-μm nylon mesh cell strainer and centrifuged at 100 g for 2 min, after which the supernatant was discarded. To prevent hypercontraction, the cardiomyocytes were resuspended in medium (NaCl 130 mM, KCl 5.4 mM, MgCl2 0.5 mM, NaH2PO4 0.33 mM, D-glucose 22 mM, HEPES 25 mM, FBS 0.2%; pH 7.4) containing a low concentration of calcium (0.1 mM). Rod-shaped live cardiomyocytes (viability of cardiomyocytes was ≥80% for all time points) were collected immediately with a 0.2–2-µL pipette (sample volume, 0.5 µL) and incubated in lysis buffer.
Single-cardiomyocyte cDNA libraries were generated using the Smart-seq2 protocol26 and the efﬁciency of reverse transcription was assessed by examining the cycle threshold (Ct) values of control genes (Tnnt2) from quantitative real-time polymerase chain reaction (qRT-PCR) using a CFX96 Real-Time PCR Detection System (Bio-Rad), and the distribution of cDNA fragment lengths was assessed using LabChip GX (Perkin Elmer) and/or TapeStation 2200 (Agilent Technologies). The following primer sets were used for qRT-PCR: Tnnt2 mRNA forward: TCCTGGCAGA GAGGAGGAAG; Tnnt2 mRNA reverse: TGCAGGTCGA ACTTCTCAGC. A Ct value of 25 was set as the threshold. The sequencing libraries were subjected to paired-end 51-bp RNA sequencing on a HiSeq 2753 (Illumina) in rapid mode

tag: strain

value: single-cardiomyocyte

value: The clean reads were aligned to the mouse genome (mm10) using STAR (version 2.7.261a)


title: MI_D1_RZ_1_45

description:
Smart-seq2
ReadCounts.xlsx

tag: operation

value: MI day1

value: remote


title: Moon SF 6

value: cultured in autologous normal equine synovial fluid

value: 6 days


title: Moon SF 10

value: 10 days


title: NFK1_9

value: Baseline profiling

value: 0 years

value: male

value: Ambient

value: Full

value: c

value: Keratinocytes were maintained in serum-free human epidermal keratinocyte media on collagen IV-coated dishes. Triplicate cultures derived from the same parent plate or vial obtained from Coriell were maintained in parallel through replicative senescence, which was defined in this study as drastically slowed growth (inability to reach near-confluence at 14 days after previous passage) or viable fraction of cells falling below 60%. Passaging occurred as cells became approximately 90% confluent.


title: sh_MI_D1_2_21

data_processing:
Raw sequencing reads from single-cardiomyocyte RNA sequencing libraries were trimmed to remove adapter sequences and low-quality bases using fastp-0.20.038 with the parameters “--cut_tail --cut_tail_window_size 10 --cut_tail_mean_quality 30 --length_required 351”.
ReadCounts file generated using featureCounts.

extract_protocol:
Cardiomyocytes were isolated using Langendorff perfusion from the left ventricle as previously described. Enzymatic dissociation using Langendorff perfusion was performed with 35 mL enzyme solution (type 2 collagenase 1 mg/mL [Worthington], protease type XIV 0.05 mg/mL [Sigma-Aldrich], NaCl 130 mM, KCl 5.4 mM, MgCl2 0.5 mM, NaH2PO4 0.33 mM, D-glucose 22 mM, HEPES 25 mM; pH 7.4) pre-heated to 37 °C, at a rate of 3 mL/min. To neutralize enzymatic activity, fetal bovine serum (FBS) was added to the solution to a final concentration of 0.2% (v/v). After perfusion of digestion buffer, left ventricle was cut according to each sectional region (IR, RR) and cardiomyocytes were subsequently isolated. Cell suspensions were filtered through a 100-μm nylon mesh cell strainer and centrifuged at 100 g for 2 min, after which the supernatant was discarded. To prevent hypercontraction, the cardiomyocytes were resuspended in medium (NaCl 130 mM, KCl 5.4 mM, MgCl2 0.5 mM, NaH2PO4 0.33 mM, D-glucose 22 mM, HEPES 25 mM, FBS 0.2%; pH 7.4) containing a low concentration of calcium (0.1 mM). Rod-shaped live cardiomyocytes (viability of cardiomyocytes was ≥80% for all time points) were collected immediately with a 0.2–2-µL pipette (sample volume, 0.5 µL) and incubated in lysis buffer.
Single-cardiomyocyte cDNA libraries were generated using the Smart-seq2 protocol26 and the efﬁciency of reverse transcription was assessed by examining the cycle threshold (Ct) values of control genes (Tnnt2) from quantitative real-time polymerase chain reaction (qRT-PCR) using a CFX96 Real-Time PCR Detection System (Bio-Rad), and the distribution of cDNA fragment lengths was assessed using LabChip GX (Perkin Elmer) and/or TapeStation 2200 (Agilent Technologies). The following primer sets were used for qRT-PCR: Tnnt2 mRNA forward: TCCTGGCAGA GAGGAGGAAG; Tnnt2 mRNA reverse: TGCAGGTCGA ACTTCTCAGC. A Ct value of 25 was set as the threshold. The sequencing libraries were subjected to paired-end 51-bp RNA sequencing on a HiSeq 2751 (Illumina) in rapid mode

value: MI day1_shCsrp3

tag: region

value: ishchemic + border

value: The clean reads were aligned to the mouse genome (mm10) using STAR (version 2.7.259a)


title: sh_MI_D1_2_20

data_processing:
Raw sequencing reads from single-cardiomyocyte RNA sequencing libraries were trimmed to remove adapter sequences and low-quality bases using fastp-0.20.038 with the parameters “--cut_tail --cut_tail_window_size 10 --cut_tail_mean_quality 30 --length_required 350”.
ReadCounts file generated using featureCounts.

extract_protocol:
Cardiomyocytes were isolated using Langendorff perfusion from the left ventricle as previously described. Enzymatic dissociation using Langendorff perfusion was performed with 35 mL enzyme solution (type 2 collagenase 1 mg/mL [Worthington], protease type XIV 0.05 mg/mL [Sigma-Aldrich], NaCl 130 mM, KCl 5.4 mM, MgCl2 0.5 mM, NaH2PO4 0.33 mM, D-glucose 22 mM, HEPES 25 mM; pH 7.4) pre-heated to 37 °C, at a rate of 3 mL/min. To neutralize enzymatic activity, fetal bovine serum (FBS) was added to the solution to a final concentration of 0.2% (v/v). After perfusion of digestion buffer, left ventricle was cut according to each sectional region (IR, RR) and cardiomyocytes were subsequently isolated. Cell suspensions were filtered through a 100-μm nylon mesh cell strainer and centrifuged at 100 g for 2 min, after which the supernatant was discarded. To prevent hypercontraction, the cardiomyocytes were resuspended in medium (NaCl 130 mM, KCl 5.4 mM, MgCl2 0.5 mM, NaH2PO4 0.33 mM, D-glucose 22 mM, HEPES 25 mM, FBS 0.2%; pH 7.4) containing a low concentration of calcium (0.1 mM). Rod-shaped live cardiomyocytes (viability of cardiomyocytes was ≥80% for all time points) were collected immediately with a 0.2–2-µL pipette (sample volume, 0.5 µL) and incubated in lysis buffer.
Single-cardiomyocyte cDNA libraries were generated using the Smart-seq2 protocol26 and the efﬁciency of reverse transcription was assessed by examining the cycle threshold (Ct) values of control genes (Tnnt2) from quantitative real-time polymerase chain reaction (qRT-PCR) using a CFX96 Real-Time PCR Detection System (Bio-Rad), and the distribution of cDNA fragment lengths was assessed using LabChip GX (Perkin Elmer) and/or TapeStation 2200 (Agilent Technologies). The following primer sets were used for qRT-PCR: Tnnt2 mRNA forward: TCCTGGCAGA GAGGAGGAAG; Tnnt2 mRNA reverse: TGCAGGTCGA ACTTCTCAGC. A Ct value of 25 was set as the threshold. The sequencing libraries were subjected to paired-end 51-bp RNA sequencing on a HiSeq 2750 (Illumina) in rapid mode

tag: tissue

value: single-cardiomyocyte

value: The clean reads were aligned to the mouse genome (mm10) using STAR (version 2.7.258a)


title: NFK1_7

value: b


title: Moon ISF 10

value: Bone marrow mononuclear cells

value: Thoroughbred

value: Adult

value: Moon

value: Female

value: Mare

value: cultured in inflammed equine synovial fluid


title: MI_D1_RZ_1_44

description:
Smart-seq2
ReadCounts.xlsx

value: MI day1

value: remote

tag: name in supplementary file


title: MI_D1_RZ_1_43

description:
Smart-seq2
ReadCounts.xlsx


title: sh_MI_D1_2_2

data_processing:
Raw sequencing reads from single-cardiomyocyte RNA sequencing libraries were trimmed to remove adapter sequences and low-quality bases using fastp-0.20.038 with the parameters “--cut_tail --cut_tail_window_size 10 --cut_tail_mean_quality 30 --length_required 349”.
ReadCounts file generated using featureCounts.

extract_protocol:
Cardiomyocytes were isolated using Langendorff perfusion from the left ventricle as previously described. Enzymatic dissociation using Langendorff perfusion was performed with 35 mL enzyme solution (type 2 collagenase 1 mg/mL [Worthington], protease type XIV 0.05 mg/mL [Sigma-Aldrich], NaCl 130 mM, KCl 5.4 mM, MgCl2 0.5 mM, NaH2PO4 0.33 mM, D-glucose 22 mM, HEPES 25 mM; pH 7.4) pre-heated to 37 °C, at a rate of 3 mL/min. To neutralize enzymatic activity, fetal bovine serum (FBS) was added to the solution to a final concentration of 0.2% (v/v). After perfusion of digestion buffer, left ventricle was cut according to each sectional region (IR, RR) and cardiomyocytes were subsequently isolated. Cell suspensions were filtered through a 100-μm nylon mesh cell strainer and centrifuged at 100 g for 2 min, after which the supernatant was discarded. To prevent hypercontraction, the cardiomyocytes were resuspended in medium (NaCl 130 mM, KCl 5.4 mM, MgCl2 0.5 mM, NaH2PO4 0.33 mM, D-glucose 22 mM, HEPES 25 mM, FBS 0.2%; pH 7.4) containing a low concentration of calcium (0.1 mM). Rod-shaped live cardiomyocytes (viability of cardiomyocytes was ≥80% for all time points) were collected immediately with a 0.2–2-µL pipette (sample volume, 0.5 µL) and incubated in lysis buffer.
Single-cardiomyocyte cDNA libraries were generated using the Smart-seq2 protocol26 and the efﬁciency of reverse transcription was assessed by examining the cycle threshold (Ct) values of control genes (Tnnt2) from quantitative real-time polymerase chain reaction (qRT-PCR) using a CFX96 Real-Time PCR Detection System (Bio-Rad), and the distribution of cDNA fragment lengths was assessed using LabChip GX (Perkin Elmer) and/or TapeStation 2200 (Agilent Technologies). The following primer sets were used for qRT-PCR: Tnnt2 mRNA forward: TCCTGGCAGA GAGGAGGAAG; Tnnt2 mRNA reverse: TGCAGGTCGA ACTTCTCAGC. A Ct value of 25 was set as the threshold. The sequencing libraries were subjected to paired-end 51-bp RNA sequencing on a HiSeq 2749 (Illumina) in rapid mode

value: The clean reads were aligned to the mouse genome (mm10) using STAR (version 2.7.257a)


title: Moon ISF 6

value: 6 days


title: NFK1_6

tag: subexperiment

value: Baseline profiling

value: 0 years

value: male

value: Ambient

value: Full

value: a

value: Keratinocytes were maintained in serum-free human epidermal keratinocyte media on collagen IV-coated dishes. Triplicate cultures derived from the same parent plate or vial obtained from Coriell were maintained in parallel through replicative senescence, which was defined in this study as drastically slowed growth (inability to reach near-confluence at 14 days after previous passage) or viable fraction of cells falling below 60%. Passaging occurred as cells became approximately 90% confluent.


title: NFK1_14

tag: subculture

value: c


title: MI_D1_RZ_1_41

description:
Smart-seq2
ReadCounts.xlsx

value: single-cardiomyocyte


title: Moon BMNC 0hr

value: Bone marrow mononuclear cells

value: Thoroughbred

value: Adult

value: Moon

value: 0 h - baseline


title: NFK1_8

value: b

tag: growth protocol


title: MI_D1_RZ_1_39

description:
Smart-seq2
ReadCounts.xlsx

value: MI day1

value: remote


title: NFK1_3

value: Baseline profiling


title: sh_MI_D1_2_18

data_processing:
Raw sequencing reads from single-cardiomyocyte RNA sequencing libraries were trimmed to remove adapter sequences and low-quality bases using fastp-0.20.038 with the parameters “--cut_tail --cut_tail_window_size 10 --cut_tail_mean_quality 30 --length_required 347”.
ReadCounts file generated using featureCounts.

extract_protocol:
Cardiomyocytes were isolated using Langendorff perfusion from the left ventricle as previously described. Enzymatic dissociation using Langendorff perfusion was performed with 35 mL enzyme solution (type 2 collagenase 1 mg/mL [Worthington], protease type XIV 0.05 mg/mL [Sigma-Aldrich], NaCl 130 mM, KCl 5.4 mM, MgCl2 0.5 mM, NaH2PO4 0.33 mM, D-glucose 22 mM, HEPES 25 mM; pH 7.4) pre-heated to 37 °C, at a rate of 3 mL/min. To neutralize enzymatic activity, fetal bovine serum (FBS) was added to the solution to a final concentration of 0.2% (v/v). After perfusion of digestion buffer, left ventricle was cut according to each sectional region (IR, RR) and cardiomyocytes were subsequently isolated. Cell suspensions were filtered through a 100-μm nylon mesh cell strainer and centrifuged at 100 g for 2 min, after which the supernatant was discarded. To prevent hypercontraction, the cardiomyocytes were resuspended in medium (NaCl 130 mM, KCl 5.4 mM, MgCl2 0.5 mM, NaH2PO4 0.33 mM, D-glucose 22 mM, HEPES 25 mM, FBS 0.2%; pH 7.4) containing a low concentration of calcium (0.1 mM). Rod-shaped live cardiomyocytes (viability of cardiomyocytes was ≥80% for all time points) were collected immediately with a 0.2–2-µL pipette (sample volume, 0.5 µL) and incubated in lysis buffer.
Single-cardiomyocyte cDNA libraries were generated using the Smart-seq2 protocol26 and the efﬁciency of reverse transcription was assessed by examining the cycle threshold (Ct) values of control genes (Tnnt2) from quantitative real-time polymerase chain reaction (qRT-PCR) using a CFX96 Real-Time PCR Detection System (Bio-Rad), and the distribution of cDNA fragment lengths was assessed using LabChip GX (Perkin Elmer) and/or TapeStation 2200 (Agilent Technologies). The following primer sets were used for qRT-PCR: Tnnt2 mRNA forward: TCCTGGCAGA GAGGAGGAAG; Tnnt2 mRNA reverse: TGCAGGTCGA ACTTCTCAGC. A Ct value of 25 was set as the threshold. The sequencing libraries were subjected to paired-end 51-bp RNA sequencing on a HiSeq 2747 (Illumina) in rapid mode

value: MI day1_shCsrp3

value: ishchemic + border

tag: genome build

value: The clean reads were aligned to the mouse genome (mm10) using STAR (version 2.7.255a)


title: NFK1_4

value: 0 years

value: male

value: Ambient

value: Full


title: sh_MI_D1_2_19

data_processing:
Raw sequencing reads from single-cardiomyocyte RNA sequencing libraries were trimmed to remove adapter sequences and low-quality bases using fastp-0.20.038 with the parameters “--cut_tail --cut_tail_window_size 10 --cut_tail_mean_quality 30 --length_required 348”.
ReadCounts file generated using featureCounts.

extract_protocol:
Cardiomyocytes were isolated using Langendorff perfusion from the left ventricle as previously described. Enzymatic dissociation using Langendorff perfusion was performed with 35 mL enzyme solution (type 2 collagenase 1 mg/mL [Worthington], protease type XIV 0.05 mg/mL [Sigma-Aldrich], NaCl 130 mM, KCl 5.4 mM, MgCl2 0.5 mM, NaH2PO4 0.33 mM, D-glucose 22 mM, HEPES 25 mM; pH 7.4) pre-heated to 37 °C, at a rate of 3 mL/min. To neutralize enzymatic activity, fetal bovine serum (FBS) was added to the solution to a final concentration of 0.2% (v/v). After perfusion of digestion buffer, left ventricle was cut according to each sectional region (IR, RR) and cardiomyocytes were subsequently isolated. Cell suspensions were filtered through a 100-μm nylon mesh cell strainer and centrifuged at 100 g for 2 min, after which the supernatant was discarded. To prevent hypercontraction, the cardiomyocytes were resuspended in medium (NaCl 130 mM, KCl 5.4 mM, MgCl2 0.5 mM, NaH2PO4 0.33 mM, D-glucose 22 mM, HEPES 25 mM, FBS 0.2%; pH 7.4) containing a low concentration of calcium (0.1 mM). Rod-shaped live cardiomyocytes (viability of cardiomyocytes was ≥80% for all time points) were collected immediately with a 0.2–2-µL pipette (sample volume, 0.5 µL) and incubated in lysis buffer.
Single-cardiomyocyte cDNA libraries were generated using the Smart-seq2 protocol26 and the efﬁciency of reverse transcription was assessed by examining the cycle threshold (Ct) values of control genes (Tnnt2) from quantitative real-time polymerase chain reaction (qRT-PCR) using a CFX96 Real-Time PCR Detection System (Bio-Rad), and the distribution of cDNA fragment lengths was assessed using LabChip GX (Perkin Elmer) and/or TapeStation 2200 (Agilent Technologies). The following primer sets were used for qRT-PCR: Tnnt2 mRNA forward: TCCTGGCAGA GAGGAGGAAG; Tnnt2 mRNA reverse: TGCAGGTCGA ACTTCTCAGC. A Ct value of 25 was set as the threshold. The sequencing libraries were subjected to paired-end 51-bp RNA sequencing on a HiSeq 2748 (Illumina) in rapid mode

value: single-cardiomyocyte

value: The clean reads were aligned to the mouse genome (mm10) using STAR (version 2.7.256a)


title: MI_D1_RZ_1_38

description:
Smart-seq2
ReadCounts.xlsx


title: sh_MI_D1_2_17

data_processing:
Raw sequencing reads from single-cardiomyocyte RNA sequencing libraries were trimmed to remove adapter sequences and low-quality bases using fastp-0.20.038 with the parameters “--cut_tail --cut_tail_window_size 10 --cut_tail_mean_quality 30 --length_required 346”.
ReadCounts file generated using featureCounts.

extract_protocol:
Cardiomyocytes were isolated using Langendorff perfusion from the left ventricle as previously described. Enzymatic dissociation using Langendorff perfusion was performed with 35 mL enzyme solution (type 2 collagenase 1 mg/mL [Worthington], protease type XIV 0.05 mg/mL [Sigma-Aldrich], NaCl 130 mM, KCl 5.4 mM, MgCl2 0.5 mM, NaH2PO4 0.33 mM, D-glucose 22 mM, HEPES 25 mM; pH 7.4) pre-heated to 37 °C, at a rate of 3 mL/min. To neutralize enzymatic activity, fetal bovine serum (FBS) was added to the solution to a final concentration of 0.2% (v/v). After perfusion of digestion buffer, left ventricle was cut according to each sectional region (IR, RR) and cardiomyocytes were subsequently isolated. Cell suspensions were filtered through a 100-μm nylon mesh cell strainer and centrifuged at 100 g for 2 min, after which the supernatant was discarded. To prevent hypercontraction, the cardiomyocytes were resuspended in medium (NaCl 130 mM, KCl 5.4 mM, MgCl2 0.5 mM, NaH2PO4 0.33 mM, D-glucose 22 mM, HEPES 25 mM, FBS 0.2%; pH 7.4) containing a low concentration of calcium (0.1 mM). Rod-shaped live cardiomyocytes (viability of cardiomyocytes was ≥80% for all time points) were collected immediately with a 0.2–2-µL pipette (sample volume, 0.5 µL) and incubated in lysis buffer.
Single-cardiomyocyte cDNA libraries were generated using the Smart-seq2 protocol26 and the efﬁciency of reverse transcription was assessed by examining the cycle threshold (Ct) values of control genes (Tnnt2) from quantitative real-time polymerase chain reaction (qRT-PCR) using a CFX96 Real-Time PCR Detection System (Bio-Rad), and the distribution of cDNA fragment lengths was assessed using LabChip GX (Perkin Elmer) and/or TapeStation 2200 (Agilent Technologies). The following primer sets were used for qRT-PCR: Tnnt2 mRNA forward: TCCTGGCAGA GAGGAGGAAG; Tnnt2 mRNA reverse: TGCAGGTCGA ACTTCTCAGC. A Ct value of 25 was set as the threshold. The sequencing libraries were subjected to paired-end 51-bp RNA sequencing on a HiSeq 2746 (Illumina) in rapid mode

value: The clean reads were aligned to the mouse genome (mm10) using STAR (version 2.7.254a)


title: MI_D1_RZ_1_40

description:
Smart-seq2
ReadCounts.xlsx


title: NFK1_2

value: c

value: Keratinocytes were maintained in serum-free human epidermal keratinocyte media on collagen IV-coated dishes. Triplicate cultures derived from the same parent plate or vial obtained from Coriell were maintained in parallel through replicative senescence, which was defined in this study as drastically slowed growth (inability to reach near-confluence at 14 days after previous passage) or viable fraction of cells falling below 60%. Passaging occurred as cells became approximately 90% confluent.


title: sh_MI_D1_2_22

data_processing:
Raw sequencing reads from single-cardiomyocyte RNA sequencing libraries were trimmed to remove adapter sequences and low-quality bases using fastp-0.20.038 with the parameters “--cut_tail --cut_tail_window_size 10 --cut_tail_mean_quality 30 --length_required 352”.
ReadCounts file generated using featureCounts.

extract_protocol:
Cardiomyocytes were isolated using Langendorff perfusion from the left ventricle as previously described. Enzymatic dissociation using Langendorff perfusion was performed with 35 mL enzyme solution (type 2 collagenase 1 mg/mL [Worthington], protease type XIV 0.05 mg/mL [Sigma-Aldrich], NaCl 130 mM, KCl 5.4 mM, MgCl2 0.5 mM, NaH2PO4 0.33 mM, D-glucose 22 mM, HEPES 25 mM; pH 7.4) pre-heated to 37 °C, at a rate of 3 mL/min. To neutralize enzymatic activity, fetal bovine serum (FBS) was added to the solution to a final concentration of 0.2% (v/v). After perfusion of digestion buffer, left ventricle was cut according to each sectional region (IR, RR) and cardiomyocytes were subsequently isolated. Cell suspensions were filtered through a 100-μm nylon mesh cell strainer and centrifuged at 100 g for 2 min, after which the supernatant was discarded. To prevent hypercontraction, the cardiomyocytes were resuspended in medium (NaCl 130 mM, KCl 5.4 mM, MgCl2 0.5 mM, NaH2PO4 0.33 mM, D-glucose 22 mM, HEPES 25 mM, FBS 0.2%; pH 7.4) containing a low concentration of calcium (0.1 mM). Rod-shaped live cardiomyocytes (viability of cardiomyocytes was ≥80% for all time points) were collected immediately with a 0.2–2-µL pipette (sample volume, 0.5 µL) and incubated in lysis buffer.
Single-cardiomyocyte cDNA libraries were generated using the Smart-seq2 protocol26 and the efﬁciency of reverse transcription was assessed by examining the cycle threshold (Ct) values of control genes (Tnnt2) from quantitative real-time polymerase chain reaction (qRT-PCR) using a CFX96 Real-Time PCR Detection System (Bio-Rad), and the distribution of cDNA fragment lengths was assessed using LabChip GX (Perkin Elmer) and/or TapeStation 2200 (Agilent Technologies). The following primer sets were used for qRT-PCR: Tnnt2 mRNA forward: TCCTGGCAGA GAGGAGGAAG; Tnnt2 mRNA reverse: TGCAGGTCGA ACTTCTCAGC. A Ct value of 25 was set as the threshold. The sequencing libraries were subjected to paired-end 51-bp RNA sequencing on a HiSeq 2752 (Illumina) in rapid mode

value: The clean reads were aligned to the mouse genome (mm10) using STAR (version 2.7.260a)


title: Lurie SF 10

tag: cell type

value: Bone marrow mononuclear cells

value: Thoroughbred

value: Adult

value: Lurie

value: gelding

value: cultured in autologous normal equine synovial fluid

value: 10 days


title: MI_D1_RZ_1_37

description:
Smart-seq2
ReadCounts.xlsx

value: MI day1

value: remote


title: NFK1_5

value: Baseline profiling

value: 0 years

value: male

value: Ambient


title: ASF1_15

source_name: Skin, arm

value: 31 years

value: Full

value: Fibroblasts were maintained in Eagle’s MEM with Earle’s salts with 10% v/v fetal bovine serum. Triplicate cultures derived from the same parent plate or vial obtained from Coriell were maintained in parallel through replicative senescence, which was defined in this study as drastically slowed growth (inability to reach near-confluence at 14 days after previous passage) or viable fraction of cells falling below 60%. Passaging occurred as cells became approximately 90% confluent.


title: sh_MI_D1_2_16

data_processing:
Raw sequencing reads from single-cardiomyocyte RNA sequencing libraries were trimmed to remove adapter sequences and low-quality bases using fastp-0.20.038 with the parameters “--cut_tail --cut_tail_window_size 10 --cut_tail_mean_quality 30 --length_required 345”.
ReadCounts file generated using featureCounts.

extract_protocol:
Cardiomyocytes were isolated using Langendorff perfusion from the left ventricle as previously described. Enzymatic dissociation using Langendorff perfusion was performed with 35 mL enzyme solution (type 2 collagenase 1 mg/mL [Worthington], protease type XIV 0.05 mg/mL [Sigma-Aldrich], NaCl 130 mM, KCl 5.4 mM, MgCl2 0.5 mM, NaH2PO4 0.33 mM, D-glucose 22 mM, HEPES 25 mM; pH 7.4) pre-heated to 37 °C, at a rate of 3 mL/min. To neutralize enzymatic activity, fetal bovine serum (FBS) was added to the solution to a final concentration of 0.2% (v/v). After perfusion of digestion buffer, left ventricle was cut according to each sectional region (IR, RR) and cardiomyocytes were subsequently isolated. Cell suspensions were filtered through a 100-μm nylon mesh cell strainer and centrifuged at 100 g for 2 min, after which the supernatant was discarded. To prevent hypercontraction, the cardiomyocytes were resuspended in medium (NaCl 130 mM, KCl 5.4 mM, MgCl2 0.5 mM, NaH2PO4 0.33 mM, D-glucose 22 mM, HEPES 25 mM, FBS 0.2%; pH 7.4) containing a low concentration of calcium (0.1 mM). Rod-shaped live cardiomyocytes (viability of cardiomyocytes was ≥80% for all time points) were collected immediately with a 0.2–2-µL pipette (sample volume, 0.5 µL) and incubated in lysis buffer.
Single-cardiomyocyte cDNA libraries were generated using the Smart-seq2 protocol26 and the efﬁciency of reverse transcription was assessed by examining the cycle threshold (Ct) values of control genes (Tnnt2) from quantitative real-time polymerase chain reaction (qRT-PCR) using a CFX96 Real-Time PCR Detection System (Bio-Rad), and the distribution of cDNA fragment lengths was assessed using LabChip GX (Perkin Elmer) and/or TapeStation 2200 (Agilent Technologies). The following primer sets were used for qRT-PCR: Tnnt2 mRNA forward: TCCTGGCAGA GAGGAGGAAG; Tnnt2 mRNA reverse: TGCAGGTCGA ACTTCTCAGC. A Ct value of 25 was set as the threshold. The sequencing libraries were subjected to paired-end 51-bp RNA sequencing on a HiSeq 2745 (Illumina) in rapid mode

value: MI day1_shCsrp3

value: ishchemic + border

value: single-cardiomyocyte

value: The clean reads were aligned to the mouse genome (mm10) using STAR (version 2.7.253a)


title: Lurie SF 6

value: Bone marrow mononuclear cells

tag: breed

value: Thoroughbred

value: Adult

value: Lurie

value: 6 days


title: sh_MI_D1_2_15

data_processing:
Raw sequencing reads from single-cardiomyocyte RNA sequencing libraries were trimmed to remove adapter sequences and low-quality bases using fastp-0.20.038 with the parameters “--cut_tail --cut_tail_window_size 10 --cut_tail_mean_quality 30 --length_required 344”.
ReadCounts file generated using featureCounts.

extract_protocol:
Cardiomyocytes were isolated using Langendorff perfusion from the left ventricle as previously described. Enzymatic dissociation using Langendorff perfusion was performed with 35 mL enzyme solution (type 2 collagenase 1 mg/mL [Worthington], protease type XIV 0.05 mg/mL [Sigma-Aldrich], NaCl 130 mM, KCl 5.4 mM, MgCl2 0.5 mM, NaH2PO4 0.33 mM, D-glucose 22 mM, HEPES 25 mM; pH 7.4) pre-heated to 37 °C, at a rate of 3 mL/min. To neutralize enzymatic activity, fetal bovine serum (FBS) was added to the solution to a final concentration of 0.2% (v/v). After perfusion of digestion buffer, left ventricle was cut according to each sectional region (IR, RR) and cardiomyocytes were subsequently isolated. Cell suspensions were filtered through a 100-μm nylon mesh cell strainer and centrifuged at 100 g for 2 min, after which the supernatant was discarded. To prevent hypercontraction, the cardiomyocytes were resuspended in medium (NaCl 130 mM, KCl 5.4 mM, MgCl2 0.5 mM, NaH2PO4 0.33 mM, D-glucose 22 mM, HEPES 25 mM, FBS 0.2%; pH 7.4) containing a low concentration of calcium (0.1 mM). Rod-shaped live cardiomyocytes (viability of cardiomyocytes was ≥80% for all time points) were collected immediately with a 0.2–2-µL pipette (sample volume, 0.5 µL) and incubated in lysis buffer.
Single-cardiomyocyte cDNA libraries were generated using the Smart-seq2 protocol26 and the efﬁciency of reverse transcription was assessed by examining the cycle threshold (Ct) values of control genes (Tnnt2) from quantitative real-time polymerase chain reaction (qRT-PCR) using a CFX96 Real-Time PCR Detection System (Bio-Rad), and the distribution of cDNA fragment lengths was assessed using LabChip GX (Perkin Elmer) and/or TapeStation 2200 (Agilent Technologies). The following primer sets were used for qRT-PCR: Tnnt2 mRNA forward: TCCTGGCAGA GAGGAGGAAG; Tnnt2 mRNA reverse: TGCAGGTCGA ACTTCTCAGC. A Ct value of 25 was set as the threshold. The sequencing libraries were subjected to paired-end 51-bp RNA sequencing on a HiSeq 2744 (Illumina) in rapid mode

value: The clean reads were aligned to the mouse genome (mm10) using STAR (version 2.7.252a)


title: MI_D1_RZ_1_36

description:
Smart-seq2
ReadCounts.xlsx

value: MI day1

value: remote


title: Lurie SF 96

tag: age

value: gelding

value: cultured in autologous normal equine synovial fluid

value: 96 hours


title: MI_D1_RZ_1_35

description:
Smart-seq2
ReadCounts.xlsx


title: Lurie SF 48

tag: name

value: 48 hours


title: ASF1_16

value: Baseline profiling

value: 31 years

value: male

value: Ambient

value: Full

value: b

value: Fibroblasts were maintained in Eagle’s MEM with Earle’s salts with 10% v/v fetal bovine serum. Triplicate cultures derived from the same parent plate or vial obtained from Coriell were maintained in parallel through replicative senescence, which was defined in this study as drastically slowed growth (inability to reach near-confluence at 14 days after previous passage) or viable fraction of cells falling below 60%. Passaging occurred as cells became approximately 90% confluent.


title: Lurie ISF 96

value: Bone marrow mononuclear cells

value: Thoroughbred

value: Adult

tag: Sex

value: cultured in inflammed equine synovial fluid


title: sh_MI_D1_2_14

data_processing:
Raw sequencing reads from single-cardiomyocyte RNA sequencing libraries were trimmed to remove adapter sequences and low-quality bases using fastp-0.20.038 with the parameters “--cut_tail --cut_tail_window_size 10 --cut_tail_mean_quality 30 --length_required 343”.
ReadCounts file generated using featureCounts.

extract_protocol:
Cardiomyocytes were isolated using Langendorff perfusion from the left ventricle as previously described. Enzymatic dissociation using Langendorff perfusion was performed with 35 mL enzyme solution (type 2 collagenase 1 mg/mL [Worthington], protease type XIV 0.05 mg/mL [Sigma-Aldrich], NaCl 130 mM, KCl 5.4 mM, MgCl2 0.5 mM, NaH2PO4 0.33 mM, D-glucose 22 mM, HEPES 25 mM; pH 7.4) pre-heated to 37 °C, at a rate of 3 mL/min. To neutralize enzymatic activity, fetal bovine serum (FBS) was added to the solution to a final concentration of 0.2% (v/v). After perfusion of digestion buffer, left ventricle was cut according to each sectional region (IR, RR) and cardiomyocytes were subsequently isolated. Cell suspensions were filtered through a 100-μm nylon mesh cell strainer and centrifuged at 100 g for 2 min, after which the supernatant was discarded. To prevent hypercontraction, the cardiomyocytes were resuspended in medium (NaCl 130 mM, KCl 5.4 mM, MgCl2 0.5 mM, NaH2PO4 0.33 mM, D-glucose 22 mM, HEPES 25 mM, FBS 0.2%; pH 7.4) containing a low concentration of calcium (0.1 mM). Rod-shaped live cardiomyocytes (viability of cardiomyocytes was ≥80% for all time points) were collected immediately with a 0.2–2-µL pipette (sample volume, 0.5 µL) and incubated in lysis buffer.
Single-cardiomyocyte cDNA libraries were generated using the Smart-seq2 protocol26 and the efﬁciency of reverse transcription was assessed by examining the cycle threshold (Ct) values of control genes (Tnnt2) from quantitative real-time polymerase chain reaction (qRT-PCR) using a CFX96 Real-Time PCR Detection System (Bio-Rad), and the distribution of cDNA fragment lengths was assessed using LabChip GX (Perkin Elmer) and/or TapeStation 2200 (Agilent Technologies). The following primer sets were used for qRT-PCR: Tnnt2 mRNA forward: TCCTGGCAGA GAGGAGGAAG; Tnnt2 mRNA reverse: TGCAGGTCGA ACTTCTCAGC. A Ct value of 25 was set as the threshold. The sequencing libraries were subjected to paired-end 51-bp RNA sequencing on a HiSeq 2743 (Illumina) in rapid mode

value: MI day1_shCsrp3

value: ishchemic + border

value: single-cardiomyocyte

value: The clean reads were aligned to the mouse genome (mm10) using STAR (version 2.7.251a)


title: ASF1_14


title: Moon ISF 96

value: Moon

value: Female

tag: type

value: Mare

value: 96 hours


title: sh_MI_D1_2_13

data_processing:
Raw sequencing reads from single-cardiomyocyte RNA sequencing libraries were trimmed to remove adapter sequences and low-quality bases using fastp-0.20.038 with the parameters “--cut_tail --cut_tail_window_size 10 --cut_tail_mean_quality 30 --length_required 342”.
ReadCounts file generated using featureCounts.

extract_protocol:
Cardiomyocytes were isolated using Langendorff perfusion from the left ventricle as previously described. Enzymatic dissociation using Langendorff perfusion was performed with 35 mL enzyme solution (type 2 collagenase 1 mg/mL [Worthington], protease type XIV 0.05 mg/mL [Sigma-Aldrich], NaCl 130 mM, KCl 5.4 mM, MgCl2 0.5 mM, NaH2PO4 0.33 mM, D-glucose 22 mM, HEPES 25 mM; pH 7.4) pre-heated to 37 °C, at a rate of 3 mL/min. To neutralize enzymatic activity, fetal bovine serum (FBS) was added to the solution to a final concentration of 0.2% (v/v). After perfusion of digestion buffer, left ventricle was cut according to each sectional region (IR, RR) and cardiomyocytes were subsequently isolated. Cell suspensions were filtered through a 100-μm nylon mesh cell strainer and centrifuged at 100 g for 2 min, after which the supernatant was discarded. To prevent hypercontraction, the cardiomyocytes were resuspended in medium (NaCl 130 mM, KCl 5.4 mM, MgCl2 0.5 mM, NaH2PO4 0.33 mM, D-glucose 22 mM, HEPES 25 mM, FBS 0.2%; pH 7.4) containing a low concentration of calcium (0.1 mM). Rod-shaped live cardiomyocytes (viability of cardiomyocytes was ≥80% for all time points) were collected immediately with a 0.2–2-µL pipette (sample volume, 0.5 µL) and incubated in lysis buffer.
Single-cardiomyocyte cDNA libraries were generated using the Smart-seq2 protocol26 and the efﬁciency of reverse transcription was assessed by examining the cycle threshold (Ct) values of control genes (Tnnt2) from quantitative real-time polymerase chain reaction (qRT-PCR) using a CFX96 Real-Time PCR Detection System (Bio-Rad), and the distribution of cDNA fragment lengths was assessed using LabChip GX (Perkin Elmer) and/or TapeStation 2200 (Agilent Technologies). The following primer sets were used for qRT-PCR: Tnnt2 mRNA forward: TCCTGGCAGA GAGGAGGAAG; Tnnt2 mRNA reverse: TGCAGGTCGA ACTTCTCAGC. A Ct value of 25 was set as the threshold. The sequencing libraries were subjected to paired-end 51-bp RNA sequencing on a HiSeq 2742 (Illumina) in rapid mode

value: The clean reads were aligned to the mouse genome (mm10) using STAR (version 2.7.250a)


title: ASF1_13

value: Baseline profiling

value: 31 years

value: male

value: Ambient

value: c


title: MI_D1_RZ_1_33

description:
Smart-seq2
ReadCounts.xlsx

value: MI day1

value: remote


title: sh_MI_D1_2_11

data_processing:
Raw sequencing reads from single-cardiomyocyte RNA sequencing libraries were trimmed to remove adapter sequences and low-quality bases using fastp-0.20.038 with the parameters “--cut_tail --cut_tail_window_size 10 --cut_tail_mean_quality 30 --length_required 340”.
ReadCounts file generated using featureCounts.

extract_protocol:
Cardiomyocytes were isolated using Langendorff perfusion from the left ventricle as previously described. Enzymatic dissociation using Langendorff perfusion was performed with 35 mL enzyme solution (type 2 collagenase 1 mg/mL [Worthington], protease type XIV 0.05 mg/mL [Sigma-Aldrich], NaCl 130 mM, KCl 5.4 mM, MgCl2 0.5 mM, NaH2PO4 0.33 mM, D-glucose 22 mM, HEPES 25 mM; pH 7.4) pre-heated to 37 °C, at a rate of 3 mL/min. To neutralize enzymatic activity, fetal bovine serum (FBS) was added to the solution to a final concentration of 0.2% (v/v). After perfusion of digestion buffer, left ventricle was cut according to each sectional region (IR, RR) and cardiomyocytes were subsequently isolated. Cell suspensions were filtered through a 100-μm nylon mesh cell strainer and centrifuged at 100 g for 2 min, after which the supernatant was discarded. To prevent hypercontraction, the cardiomyocytes were resuspended in medium (NaCl 130 mM, KCl 5.4 mM, MgCl2 0.5 mM, NaH2PO4 0.33 mM, D-glucose 22 mM, HEPES 25 mM, FBS 0.2%; pH 7.4) containing a low concentration of calcium (0.1 mM). Rod-shaped live cardiomyocytes (viability of cardiomyocytes was ≥80% for all time points) were collected immediately with a 0.2–2-µL pipette (sample volume, 0.5 µL) and incubated in lysis buffer.
Single-cardiomyocyte cDNA libraries were generated using the Smart-seq2 protocol26 and the efﬁciency of reverse transcription was assessed by examining the cycle threshold (Ct) values of control genes (Tnnt2) from quantitative real-time polymerase chain reaction (qRT-PCR) using a CFX96 Real-Time PCR Detection System (Bio-Rad), and the distribution of cDNA fragment lengths was assessed using LabChip GX (Perkin Elmer) and/or TapeStation 2200 (Agilent Technologies). The following primer sets were used for qRT-PCR: Tnnt2 mRNA forward: TCCTGGCAGA GAGGAGGAAG; Tnnt2 mRNA reverse: TGCAGGTCGA ACTTCTCAGC. A Ct value of 25 was set as the threshold. The sequencing libraries were subjected to paired-end 51-bp RNA sequencing on a HiSeq 2740 (Illumina) in rapid mode

value: The clean reads were aligned to the mouse genome (mm10) using STAR (version 2.7.248a)


title: Lurie ISF 10

value: Bone marrow mononuclear cells

value: Thoroughbred

value: Adult

value: Lurie

value: gelding

tag: treatment

value: cultured in inflammed equine synovial fluid

value: 10 days


title: sh_MI_D1_2_10

data_processing:
Raw sequencing reads from single-cardiomyocyte RNA sequencing libraries were trimmed to remove adapter sequences and low-quality bases using fastp-0.20.038 with the parameters “--cut_tail --cut_tail_window_size 10 --cut_tail_mean_quality 30 --length_required 339”.
ReadCounts file generated using featureCounts.

extract_protocol:
Cardiomyocytes were isolated using Langendorff perfusion from the left ventricle as previously described. Enzymatic dissociation using Langendorff perfusion was performed with 35 mL enzyme solution (type 2 collagenase 1 mg/mL [Worthington], protease type XIV 0.05 mg/mL [Sigma-Aldrich], NaCl 130 mM, KCl 5.4 mM, MgCl2 0.5 mM, NaH2PO4 0.33 mM, D-glucose 22 mM, HEPES 25 mM; pH 7.4) pre-heated to 37 °C, at a rate of 3 mL/min. To neutralize enzymatic activity, fetal bovine serum (FBS) was added to the solution to a final concentration of 0.2% (v/v). After perfusion of digestion buffer, left ventricle was cut according to each sectional region (IR, RR) and cardiomyocytes were subsequently isolated. Cell suspensions were filtered through a 100-μm nylon mesh cell strainer and centrifuged at 100 g for 2 min, after which the supernatant was discarded. To prevent hypercontraction, the cardiomyocytes were resuspended in medium (NaCl 130 mM, KCl 5.4 mM, MgCl2 0.5 mM, NaH2PO4 0.33 mM, D-glucose 22 mM, HEPES 25 mM, FBS 0.2%; pH 7.4) containing a low concentration of calcium (0.1 mM). Rod-shaped live cardiomyocytes (viability of cardiomyocytes was ≥80% for all time points) were collected immediately with a 0.2–2-µL pipette (sample volume, 0.5 µL) and incubated in lysis buffer.
Single-cardiomyocyte cDNA libraries were generated using the Smart-seq2 protocol26 and the efﬁciency of reverse transcription was assessed by examining the cycle threshold (Ct) values of control genes (Tnnt2) from quantitative real-time polymerase chain reaction (qRT-PCR) using a CFX96 Real-Time PCR Detection System (Bio-Rad), and the distribution of cDNA fragment lengths was assessed using LabChip GX (Perkin Elmer) and/or TapeStation 2200 (Agilent Technologies). The following primer sets were used for qRT-PCR: Tnnt2 mRNA forward: TCCTGGCAGA GAGGAGGAAG; Tnnt2 mRNA reverse: TGCAGGTCGA ACTTCTCAGC. A Ct value of 25 was set as the threshold. The sequencing libraries were subjected to paired-end 51-bp RNA sequencing on a HiSeq 2739 (Illumina) in rapid mode

value: MI day1_shCsrp3

value: ishchemic + border

value: single-cardiomyocyte

value: The clean reads were aligned to the mouse genome (mm10) using STAR (version 2.7.247a)


title: ASF1_12

data_processing: Raw IDATs were processed with R (v4.1.1) package ‘SeSAMe’ with noob background correction, non-linear dye bias correction, and non-detection masking. P-value threshold was set at 0.1. Probe masking was performed using the standard mask list in SeSAMe, including probes that overlap with SNPs and repeat elements.

extract_protocol: Frozen cell pellets were thawed and lysed using QIAshredder spin columns (Qiagen).  Genomic DNA was extracted from each sample using the AllPrep DNA/RNA Mini Kit (Qiagen), then stored at -80°C before analysis.

value: Baseline profiling

value: 31 years

value: male

value: Full

value: b

value: Fibroblasts were maintained in Eagle’s MEM with Earle’s salts with 10% v/v fetal bovine serum. Triplicate cultures derived from the same parent plate or vial obtained from Coriell were maintained in parallel through replicative senescence, which was defined in this study as drastically slowed growth (inability to reach near-confluence at 14 days after previous passage) or viable fraction of cells falling below 60%. Passaging occurred as cells became approximately 90% confluent.


title: MI_D1_RZ_1_34

description:
Smart-seq2
ReadCounts.xlsx

data_processing:
Raw sequencing reads from single-cardiomyocyte RNA sequencing libraries were trimmed to remove adapter sequences and low-quality bases using fastp-0.20.027 with the parameters “--cut_tail --cut_tail_window_size 1 --cut_tail_mean_quality 30 --length_required 30”
The clean reads were aligned to the mouse genome (mm10) using STAR (version 2.7.2b)
The reads aligned to exon were counted using featureCounts
For nonCM RNA-seq, raw data was processed using Cell Ranger (version 4.0.0)
For spatial transcriptome, raw data was processed using Space Ranger (version 1.2.1)
Genome_build: For single-cardiomyocyte RNA-seq, the reference transcript data and the gene annotation file for mouse was downloaded from GENCODE (release 23, https://www.gencodegenes.org/)
Genome_build: For nonCM RNA-seq, the reference transcript data and the gene annotation file for mouse was downloaded from  https://cf.10xgenomics.com/supp/cell-exp/refdata-gex-mm10-2020-A.tar.gz.
Genome_build: For spatial transcrptome, the reference transcript data and the gene annotation file for mouse was downloaded from https://cf.10xgenomics.com/supp/spatial-exp/refdata-gex-mm10-2020-A.tar.gz.
Supplementary_files_format_and_content: ReadCounts file generated using featureCounts.
Supplementary_files_format_and_content: Each barcode.tsv.gz, features.tsv.gz and matrix.mtx.gz files genereted using Cell Ranger or Space Ranger.

extract_protocol:
Cardiomyocytes were isolated using Langendorff perfusion from the left ventricle as previously described7. Enzymatic dissociation using Langendorff perfusion was performed with 35 mL enzyme solution (type 2 collagenase 1 mg/mL [Worthington], protease type XIV 0.05 mg/mL [Sigma-Aldrich], NaCl 130 mM, KCl 5.4 mM, MgCl2 0.5 mM, NaH2PO4 0.33 mM, D-glucose 22 mM, HEPES 25 mM; pH 7.4) pre-heated to 37 °C, at a rate of 3 mL/min. To neutralize enzymatic activity, fetal bovine serum (FBS) was added to the solution to a final concentration of 0.2% (v/v). After perfusion of digestion buffer, left ventricle was cut according to each sectional region (IR, RR) and cardiomyocytes were subsequently isolated. Cell suspensions were filtered through a 100-μm nylon mesh cell strainer and centrifuged at 100 g for 2 min, after which the supernatant was discarded. To prevent hypercontraction, the cardiomyocytes were resuspended in medium (NaCl 130 mM, KCl 5.4 mM, MgCl2 0.5 mM, NaH2PO4 0.33 mM, D-glucose 22 mM, HEPES 25 mM, FBS 0.2%; pH 7.4) containing a low concentration of calcium (0.1 mM). Rod-shaped live cardiomyocytes (viability of cardiomyocytes was ≥80% for all time points) were collected immediately with a 0.2–2-µL pipette (sample volume, 0.5 µL) and incubated in lysis buffer.
Single-cardiomyocyte cDNA libraries were generated using the Smart-seq2 protocol26 and the efﬁciency of reverse transcription was assessed by examining the cycle threshold (Ct) values of control genes (Tnnt2) from quantitative real-time polymerase chain reaction (qRT-PCR) using a CFX96 Real-Time PCR Detection System (Bio-Rad), and the distribution of cDNA fragment lengths was assessed using LabChip GX (Perkin Elmer) and/or TapeStation 2200 (Agilent Technologies). The following primer sets were used for qRT-PCR: Tnnt2 mRNA forward: TCCTGGCAGA GAGGAGGAAG; Tnnt2 mRNA reverse: TGCAGGTCGA ACTTCTCAGC. A Ct value of 25 was set as the threshold. The sequencing libraries were subjected to paired-end 51-bp RNA sequencing on a HiSeq 2500 (Illumina) in rapid mode

value: MI day1

value: remote


title: MI_D1_RZ_1_31

description:
Smart-seq2
ReadCounts.xlsx


title: MI_D1_RZ_1_42

description:
Smart-seq2
ReadCounts.xlsx


title: Lurie BMNC 0hr

data_processing:
mapping (STAR 2.7.2a - STAR --outSAMstrandField intronMotif --outFilterIntronMotifs RemoveNoncanonicalU  nannotated --alignEndsType Local --chimOutType WithinBAM --twopassMode Basic --t  wopass1readsN -1 --quantMode GeneCounts --outSAMunmapped Within --outSAMtype BAM   SortedByCoordinate )
quantification (STAR-2.7.2a - GeneCounts - annotation Ensembl v 104)
Normalization (GeTMM via EdgeR; rpk.norm <- DGEList(counts=rpk,group=group)  rpk.norm <- calcNormFactors(rpk.norm)  norm.counts.rpk_edger <- cpm(rpk.norm))
DEG (EdgeR; glmQLFTest)
Genome_build: EquCab3.0
Supplementary_files_format_and_content: GeTMM gene expression values - csv file

extract_protocol:
Cultured cells were recovered in 10 mM EDTA, centrifuged (12,000g; 10 min; 4°C) and the cell pellet placed in 2 mL guanidinium chloride-phenol (Trizol®, Life Technologies). RNA was purified with on-column DNase digest (DirectZolTM RNA microprep kit, , Zymo Research, I), quantified (Qubit® 3.0 Fluorometer), and stored at -80°C. RNA quality was assessed using a Bioanalyzer 2100, Agilent Technologies, Santa Clara, CA).
cDNA libraries were prepared using TruSeq DNA Library Preparation kits (Illumina, Inc., San Diego, CA).
cDNA libraries were sequenced (NovaSeq 6000 S4, Illumina) to generate an average of 34.5 (range, 24-54) million stranded paired-end reads (2 x 150 nt) per sample

value: Bone marrow mononuclear cells

value: Thoroughbred

value: Adult

value: 0 h - baseline

tag: time


title: NFK1_1

value: 0 years

value: Ambient

value: Keratinocytes were maintained in serum-free human epidermal keratinocyte media on collagen IV-coated dishes. Triplicate cultures derived from the same parent plate or vial obtained from Coriell were maintained in parallel through replicative senescence, which was defined in this study as drastically slowed growth (inability to reach near-confluence at 14 days after previous passage) or viable fraction of cells falling below 60%. Passaging occurred as cells became approximately 90% confluent.


title: MI_D1_RZ_1_32

description:
Smart-seq2
ReadCounts.xlsx

tag: strain

value: single-cardiomyocyte


title: ASF1_8


title: ASF1_6

value: c


title: ASF1_9

value: Baseline profiling


title: ASF1_10

value: 31 years


title: sh_MI_D1_2_1

data_processing:
Raw sequencing reads from single-cardiomyocyte RNA sequencing libraries were trimmed to remove adapter sequences and low-quality bases using fastp-0.20.038 with the parameters “--cut_tail --cut_tail_window_size 10 --cut_tail_mean_quality 30 --length_required 338”.
ReadCounts file generated using featureCounts.

extract_protocol:
Cardiomyocytes were isolated using Langendorff perfusion from the left ventricle as previously described. Enzymatic dissociation using Langendorff perfusion was performed with 35 mL enzyme solution (type 2 collagenase 1 mg/mL [Worthington], protease type XIV 0.05 mg/mL [Sigma-Aldrich], NaCl 130 mM, KCl 5.4 mM, MgCl2 0.5 mM, NaH2PO4 0.33 mM, D-glucose 22 mM, HEPES 25 mM; pH 7.4) pre-heated to 37 °C, at a rate of 3 mL/min. To neutralize enzymatic activity, fetal bovine serum (FBS) was added to the solution to a final concentration of 0.2% (v/v). After perfusion of digestion buffer, left ventricle was cut according to each sectional region (IR, RR) and cardiomyocytes were subsequently isolated. Cell suspensions were filtered through a 100-μm nylon mesh cell strainer and centrifuged at 100 g for 2 min, after which the supernatant was discarded. To prevent hypercontraction, the cardiomyocytes were resuspended in medium (NaCl 130 mM, KCl 5.4 mM, MgCl2 0.5 mM, NaH2PO4 0.33 mM, D-glucose 22 mM, HEPES 25 mM, FBS 0.2%; pH 7.4) containing a low concentration of calcium (0.1 mM). Rod-shaped live cardiomyocytes (viability of cardiomyocytes was ≥80% for all time points) were collected immediately with a 0.2–2-µL pipette (sample volume, 0.5 µL) and incubated in lysis buffer.
Single-cardiomyocyte cDNA libraries were generated using the Smart-seq2 protocol26 and the efﬁciency of reverse transcription was assessed by examining the cycle threshold (Ct) values of control genes (Tnnt2) from quantitative real-time polymerase chain reaction (qRT-PCR) using a CFX96 Real-Time PCR Detection System (Bio-Rad), and the distribution of cDNA fragment lengths was assessed using LabChip GX (Perkin Elmer) and/or TapeStation 2200 (Agilent Technologies). The following primer sets were used for qRT-PCR: Tnnt2 mRNA forward: TCCTGGCAGA GAGGAGGAAG; Tnnt2 mRNA reverse: TGCAGGTCGA ACTTCTCAGC. A Ct value of 25 was set as the threshold. The sequencing libraries were subjected to paired-end 51-bp RNA sequencing on a HiSeq 2738 (Illumina) in rapid mode

tag: operation

value: MI day1_shCsrp3

value: ishchemic + border

value: The clean reads were aligned to the mouse genome (mm10) using STAR (version 2.7.246a)


title: sh_MI_D1_1_9

data_processing:
Raw sequencing reads from single-cardiomyocyte RNA sequencing libraries were trimmed to remove adapter sequences and low-quality bases using fastp-0.20.038 with the parameters “--cut_tail --cut_tail_window_size 10 --cut_tail_mean_quality 30 --length_required 337”.
ReadCounts file generated using featureCounts.

extract_protocol:
Cardiomyocytes were isolated using Langendorff perfusion from the left ventricle as previously described. Enzymatic dissociation using Langendorff perfusion was performed with 35 mL enzyme solution (type 2 collagenase 1 mg/mL [Worthington], protease type XIV 0.05 mg/mL [Sigma-Aldrich], NaCl 130 mM, KCl 5.4 mM, MgCl2 0.5 mM, NaH2PO4 0.33 mM, D-glucose 22 mM, HEPES 25 mM; pH 7.4) pre-heated to 37 °C, at a rate of 3 mL/min. To neutralize enzymatic activity, fetal bovine serum (FBS) was added to the solution to a final concentration of 0.2% (v/v). After perfusion of digestion buffer, left ventricle was cut according to each sectional region (IR, RR) and cardiomyocytes were subsequently isolated. Cell suspensions were filtered through a 100-μm nylon mesh cell strainer and centrifuged at 100 g for 2 min, after which the supernatant was discarded. To prevent hypercontraction, the cardiomyocytes were resuspended in medium (NaCl 130 mM, KCl 5.4 mM, MgCl2 0.5 mM, NaH2PO4 0.33 mM, D-glucose 22 mM, HEPES 25 mM, FBS 0.2%; pH 7.4) containing a low concentration of calcium (0.1 mM). Rod-shaped live cardiomyocytes (viability of cardiomyocytes was ≥80% for all time points) were collected immediately with a 0.2–2-µL pipette (sample volume, 0.5 µL) and incubated in lysis buffer.
Single-cardiomyocyte cDNA libraries were generated using the Smart-seq2 protocol26 and the efﬁciency of reverse transcription was assessed by examining the cycle threshold (Ct) values of control genes (Tnnt2) from quantitative real-time polymerase chain reaction (qRT-PCR) using a CFX96 Real-Time PCR Detection System (Bio-Rad), and the distribution of cDNA fragment lengths was assessed using LabChip GX (Perkin Elmer) and/or TapeStation 2200 (Agilent Technologies). The following primer sets were used for qRT-PCR: Tnnt2 mRNA forward: TCCTGGCAGA GAGGAGGAAG; Tnnt2 mRNA reverse: TGCAGGTCGA ACTTCTCAGC. A Ct value of 25 was set as the threshold. The sequencing libraries were subjected to paired-end 51-bp RNA sequencing on a HiSeq 2737 (Illumina) in rapid mode

tag: region

value: The clean reads were aligned to the mouse genome (mm10) using STAR (version 2.7.245a)


title: sh_MI_D1_1_8

data_processing:
Raw sequencing reads from single-cardiomyocyte RNA sequencing libraries were trimmed to remove adapter sequences and low-quality bases using fastp-0.20.038 with the parameters “--cut_tail --cut_tail_window_size 10 --cut_tail_mean_quality 30 --length_required 336”.
ReadCounts file generated using featureCounts.

extract_protocol:
Cardiomyocytes were isolated using Langendorff perfusion from the left ventricle as previously described. Enzymatic dissociation using Langendorff perfusion was performed with 35 mL enzyme solution (type 2 collagenase 1 mg/mL [Worthington], protease type XIV 0.05 mg/mL [Sigma-Aldrich], NaCl 130 mM, KCl 5.4 mM, MgCl2 0.5 mM, NaH2PO4 0.33 mM, D-glucose 22 mM, HEPES 25 mM; pH 7.4) pre-heated to 37 °C, at a rate of 3 mL/min. To neutralize enzymatic activity, fetal bovine serum (FBS) was added to the solution to a final concentration of 0.2% (v/v). After perfusion of digestion buffer, left ventricle was cut according to each sectional region (IR, RR) and cardiomyocytes were subsequently isolated. Cell suspensions were filtered through a 100-μm nylon mesh cell strainer and centrifuged at 100 g for 2 min, after which the supernatant was discarded. To prevent hypercontraction, the cardiomyocytes were resuspended in medium (NaCl 130 mM, KCl 5.4 mM, MgCl2 0.5 mM, NaH2PO4 0.33 mM, D-glucose 22 mM, HEPES 25 mM, FBS 0.2%; pH 7.4) containing a low concentration of calcium (0.1 mM). Rod-shaped live cardiomyocytes (viability of cardiomyocytes was ≥80% for all time points) were collected immediately with a 0.2–2-µL pipette (sample volume, 0.5 µL) and incubated in lysis buffer.
Single-cardiomyocyte cDNA libraries were generated using the Smart-seq2 protocol26 and the efﬁciency of reverse transcription was assessed by examining the cycle threshold (Ct) values of control genes (Tnnt2) from quantitative real-time polymerase chain reaction (qRT-PCR) using a CFX96 Real-Time PCR Detection System (Bio-Rad), and the distribution of cDNA fragment lengths was assessed using LabChip GX (Perkin Elmer) and/or TapeStation 2200 (Agilent Technologies). The following primer sets were used for qRT-PCR: Tnnt2 mRNA forward: TCCTGGCAGA GAGGAGGAAG; Tnnt2 mRNA reverse: TGCAGGTCGA ACTTCTCAGC. A Ct value of 25 was set as the threshold. The sequencing libraries were subjected to paired-end 51-bp RNA sequencing on a HiSeq 2736 (Illumina) in rapid mode

tag: tissue

value: The clean reads were aligned to the mouse genome (mm10) using STAR (version 2.7.244a)


title: Lurie ISF 48

value: Lurie

value: gelding

value: cultured in inflammed equine synovial fluid

value: 48 hours


title: MI_D1_RZ_1_28

description:
Smart-seq2
ReadCounts.xlsx

value: MI day1

value: remote

tag: name in supplementary file


title: MI_D1_RZ_1_27

description:
Smart-seq2
ReadCounts.xlsx


title: Flash SF 6

value: Bone marrow mononuclear cells

value: Thoroughbred

value: Adult

value: Flash

value: cultured in autologous normal equine synovial fluid

value: 6 days


title: MI_D1_RZ_1_30

description:
Smart-seq2
ReadCounts.xlsx

value: single-cardiomyocyte


title: ASF1_5

tag: subexperiment

value: Baseline profiling

value: 31 years

value: male

value: Ambient

value: Full

value: b

value: Fibroblasts were maintained in Eagle’s MEM with Earle’s salts with 10% v/v fetal bovine serum. Triplicate cultures derived from the same parent plate or vial obtained from Coriell were maintained in parallel through replicative senescence, which was defined in this study as drastically slowed growth (inability to reach near-confluence at 14 days after previous passage) or viable fraction of cells falling below 60%. Passaging occurred as cells became approximately 90% confluent.


title: Flash ISF 96

value: gelding

value: cultured in inflammed equine synovial fluid

value: 96 hours


title: ASF1_7

tag: subculture

value: c


title: Flash SF 48

value: Bone marrow mononuclear cells

value: Thoroughbred

value: 48 hours


title: sh_MI_D1_1_75

data_processing:
Raw sequencing reads from single-cardiomyocyte RNA sequencing libraries were trimmed to remove adapter sequences and low-quality bases using fastp-0.20.038 with the parameters “--cut_tail --cut_tail_window_size 10 --cut_tail_mean_quality 30 --length_required 335”.
ReadCounts file generated using featureCounts.

extract_protocol:
Cardiomyocytes were isolated using Langendorff perfusion from the left ventricle as previously described. Enzymatic dissociation using Langendorff perfusion was performed with 35 mL enzyme solution (type 2 collagenase 1 mg/mL [Worthington], protease type XIV 0.05 mg/mL [Sigma-Aldrich], NaCl 130 mM, KCl 5.4 mM, MgCl2 0.5 mM, NaH2PO4 0.33 mM, D-glucose 22 mM, HEPES 25 mM; pH 7.4) pre-heated to 37 °C, at a rate of 3 mL/min. To neutralize enzymatic activity, fetal bovine serum (FBS) was added to the solution to a final concentration of 0.2% (v/v). After perfusion of digestion buffer, left ventricle was cut according to each sectional region (IR, RR) and cardiomyocytes were subsequently isolated. Cell suspensions were filtered through a 100-μm nylon mesh cell strainer and centrifuged at 100 g for 2 min, after which the supernatant was discarded. To prevent hypercontraction, the cardiomyocytes were resuspended in medium (NaCl 130 mM, KCl 5.4 mM, MgCl2 0.5 mM, NaH2PO4 0.33 mM, D-glucose 22 mM, HEPES 25 mM, FBS 0.2%; pH 7.4) containing a low concentration of calcium (0.1 mM). Rod-shaped live cardiomyocytes (viability of cardiomyocytes was ≥80% for all time points) were collected immediately with a 0.2–2-µL pipette (sample volume, 0.5 µL) and incubated in lysis buffer.
Single-cardiomyocyte cDNA libraries were generated using the Smart-seq2 protocol26 and the efﬁciency of reverse transcription was assessed by examining the cycle threshold (Ct) values of control genes (Tnnt2) from quantitative real-time polymerase chain reaction (qRT-PCR) using a CFX96 Real-Time PCR Detection System (Bio-Rad), and the distribution of cDNA fragment lengths was assessed using LabChip GX (Perkin Elmer) and/or TapeStation 2200 (Agilent Technologies). The following primer sets were used for qRT-PCR: Tnnt2 mRNA forward: TCCTGGCAGA GAGGAGGAAG; Tnnt2 mRNA reverse: TGCAGGTCGA ACTTCTCAGC. A Ct value of 25 was set as the threshold. The sequencing libraries were subjected to paired-end 51-bp RNA sequencing on a HiSeq 2735 (Illumina) in rapid mode

value: MI day1_shCsrp3

value: ishchemic + border

value: The clean reads were aligned to the mouse genome (mm10) using STAR (version 2.7.243a)


title: ASF1_3

value: Baseline profiling

tag: growth protocol


title: Flash ISF 48

value: Adult

value: Flash


title: sh_MI_D1_2_12

data_processing:
Raw sequencing reads from single-cardiomyocyte RNA sequencing libraries were trimmed to remove adapter sequences and low-quality bases using fastp-0.20.038 with the parameters “--cut_tail --cut_tail_window_size 10 --cut_tail_mean_quality 30 --length_required 341”.
ReadCounts file generated using featureCounts.

extract_protocol:
Cardiomyocytes were isolated using Langendorff perfusion from the left ventricle as previously described. Enzymatic dissociation using Langendorff perfusion was performed with 35 mL enzyme solution (type 2 collagenase 1 mg/mL [Worthington], protease type XIV 0.05 mg/mL [Sigma-Aldrich], NaCl 130 mM, KCl 5.4 mM, MgCl2 0.5 mM, NaH2PO4 0.33 mM, D-glucose 22 mM, HEPES 25 mM; pH 7.4) pre-heated to 37 °C, at a rate of 3 mL/min. To neutralize enzymatic activity, fetal bovine serum (FBS) was added to the solution to a final concentration of 0.2% (v/v). After perfusion of digestion buffer, left ventricle was cut according to each sectional region (IR, RR) and cardiomyocytes were subsequently isolated. Cell suspensions were filtered through a 100-μm nylon mesh cell strainer and centrifuged at 100 g for 2 min, after which the supernatant was discarded. To prevent hypercontraction, the cardiomyocytes were resuspended in medium (NaCl 130 mM, KCl 5.4 mM, MgCl2 0.5 mM, NaH2PO4 0.33 mM, D-glucose 22 mM, HEPES 25 mM, FBS 0.2%; pH 7.4) containing a low concentration of calcium (0.1 mM). Rod-shaped live cardiomyocytes (viability of cardiomyocytes was ≥80% for all time points) were collected immediately with a 0.2–2-µL pipette (sample volume, 0.5 µL) and incubated in lysis buffer.
Single-cardiomyocyte cDNA libraries were generated using the Smart-seq2 protocol26 and the efﬁciency of reverse transcription was assessed by examining the cycle threshold (Ct) values of control genes (Tnnt2) from quantitative real-time polymerase chain reaction (qRT-PCR) using a CFX96 Real-Time PCR Detection System (Bio-Rad), and the distribution of cDNA fragment lengths was assessed using LabChip GX (Perkin Elmer) and/or TapeStation 2200 (Agilent Technologies). The following primer sets were used for qRT-PCR: Tnnt2 mRNA forward: TCCTGGCAGA GAGGAGGAAG; Tnnt2 mRNA reverse: TGCAGGTCGA ACTTCTCAGC. A Ct value of 25 was set as the threshold. The sequencing libraries were subjected to paired-end 51-bp RNA sequencing on a HiSeq 2741 (Illumina) in rapid mode

value: single-cardiomyocyte

tag: genome build

value: The clean reads were aligned to the mouse genome (mm10) using STAR (version 2.7.249a)


title: Flash SF 96

tag: cell type

value: cultured in autologous normal equine synovial fluid


title: ASF1_11

value: 31 years

value: male

value: Ambient

value: Full

value: Fibroblasts were maintained in Eagle’s MEM with Earle’s salts with 10% v/v fetal bovine serum. Triplicate cultures derived from the same parent plate or vial obtained from Coriell were maintained in parallel through replicative senescence, which was defined in this study as drastically slowed growth (inability to reach near-confluence at 14 days after previous passage) or viable fraction of cells falling below 60%. Passaging occurred as cells became approximately 90% confluent.


title: MI_D1_RZ_1_25

description:
Smart-seq2
ReadCounts.xlsx

value: MI day1

value: remote


title: sh_MI_D1_1_74

data_processing:
Raw sequencing reads from single-cardiomyocyte RNA sequencing libraries were trimmed to remove adapter sequences and low-quality bases using fastp-0.20.038 with the parameters “--cut_tail --cut_tail_window_size 10 --cut_tail_mean_quality 30 --length_required 334”.
ReadCounts file generated using featureCounts.

extract_protocol:
Cardiomyocytes were isolated using Langendorff perfusion from the left ventricle as previously described. Enzymatic dissociation using Langendorff perfusion was performed with 35 mL enzyme solution (type 2 collagenase 1 mg/mL [Worthington], protease type XIV 0.05 mg/mL [Sigma-Aldrich], NaCl 130 mM, KCl 5.4 mM, MgCl2 0.5 mM, NaH2PO4 0.33 mM, D-glucose 22 mM, HEPES 25 mM; pH 7.4) pre-heated to 37 °C, at a rate of 3 mL/min. To neutralize enzymatic activity, fetal bovine serum (FBS) was added to the solution to a final concentration of 0.2% (v/v). After perfusion of digestion buffer, left ventricle was cut according to each sectional region (IR, RR) and cardiomyocytes were subsequently isolated. Cell suspensions were filtered through a 100-μm nylon mesh cell strainer and centrifuged at 100 g for 2 min, after which the supernatant was discarded. To prevent hypercontraction, the cardiomyocytes were resuspended in medium (NaCl 130 mM, KCl 5.4 mM, MgCl2 0.5 mM, NaH2PO4 0.33 mM, D-glucose 22 mM, HEPES 25 mM, FBS 0.2%; pH 7.4) containing a low concentration of calcium (0.1 mM). Rod-shaped live cardiomyocytes (viability of cardiomyocytes was ≥80% for all time points) were collected immediately with a 0.2–2-µL pipette (sample volume, 0.5 µL) and incubated in lysis buffer.
Single-cardiomyocyte cDNA libraries were generated using the Smart-seq2 protocol26 and the efﬁciency of reverse transcription was assessed by examining the cycle threshold (Ct) values of control genes (Tnnt2) from quantitative real-time polymerase chain reaction (qRT-PCR) using a CFX96 Real-Time PCR Detection System (Bio-Rad), and the distribution of cDNA fragment lengths was assessed using LabChip GX (Perkin Elmer) and/or TapeStation 2200 (Agilent Technologies). The following primer sets were used for qRT-PCR: Tnnt2 mRNA forward: TCCTGGCAGA GAGGAGGAAG; Tnnt2 mRNA reverse: TGCAGGTCGA ACTTCTCAGC. A Ct value of 25 was set as the threshold. The sequencing libraries were subjected to paired-end 51-bp RNA sequencing on a HiSeq 2734 (Illumina) in rapid mode

value: The clean reads were aligned to the mouse genome (mm10) using STAR (version 2.7.242a)


title: Lurie ISF 6

value: Bone marrow mononuclear cells

tag: breed

value: Thoroughbred

value: Lurie

value: gelding

value: cultured in inflammed equine synovial fluid

value: 6 days


title: sh_MI_D1_1_72

data_processing:
Raw sequencing reads from single-cardiomyocyte RNA sequencing libraries were trimmed to remove adapter sequences and low-quality bases using fastp-0.20.038 with the parameters “--cut_tail --cut_tail_window_size 10 --cut_tail_mean_quality 30 --length_required 332”.
ReadCounts file generated using featureCounts.

extract_protocol:
Cardiomyocytes were isolated using Langendorff perfusion from the left ventricle as previously described. Enzymatic dissociation using Langendorff perfusion was performed with 35 mL enzyme solution (type 2 collagenase 1 mg/mL [Worthington], protease type XIV 0.05 mg/mL [Sigma-Aldrich], NaCl 130 mM, KCl 5.4 mM, MgCl2 0.5 mM, NaH2PO4 0.33 mM, D-glucose 22 mM, HEPES 25 mM; pH 7.4) pre-heated to 37 °C, at a rate of 3 mL/min. To neutralize enzymatic activity, fetal bovine serum (FBS) was added to the solution to a final concentration of 0.2% (v/v). After perfusion of digestion buffer, left ventricle was cut according to each sectional region (IR, RR) and cardiomyocytes were subsequently isolated. Cell suspensions were filtered through a 100-μm nylon mesh cell strainer and centrifuged at 100 g for 2 min, after which the supernatant was discarded. To prevent hypercontraction, the cardiomyocytes were resuspended in medium (NaCl 130 mM, KCl 5.4 mM, MgCl2 0.5 mM, NaH2PO4 0.33 mM, D-glucose 22 mM, HEPES 25 mM, FBS 0.2%; pH 7.4) containing a low concentration of calcium (0.1 mM). Rod-shaped live cardiomyocytes (viability of cardiomyocytes was ≥80% for all time points) were collected immediately with a 0.2–2-µL pipette (sample volume, 0.5 µL) and incubated in lysis buffer.
Single-cardiomyocyte cDNA libraries were generated using the Smart-seq2 protocol26 and the efﬁciency of reverse transcription was assessed by examining the cycle threshold (Ct) values of control genes (Tnnt2) from quantitative real-time polymerase chain reaction (qRT-PCR) using a CFX96 Real-Time PCR Detection System (Bio-Rad), and the distribution of cDNA fragment lengths was assessed using LabChip GX (Perkin Elmer) and/or TapeStation 2200 (Agilent Technologies). The following primer sets were used for qRT-PCR: Tnnt2 mRNA forward: TCCTGGCAGA GAGGAGGAAG; Tnnt2 mRNA reverse: TGCAGGTCGA ACTTCTCAGC. A Ct value of 25 was set as the threshold. The sequencing libraries were subjected to paired-end 51-bp RNA sequencing on a HiSeq 2732 (Illumina) in rapid mode

value: MI day1_shCsrp3

value: ishchemic + border

value: single-cardiomyocyte

value: The clean reads were aligned to the mouse genome (mm10) using STAR (version 2.7.240a)


title: AVSMC1_18

source_name: Iliac vein

value: Baseline profiling

value: 19 years

value: male

value: b

value: Vascular smooth muscle cells were maintained in Medium 199 with 1X GlutaMAX, 0.02mg/ml endothelial cell growth supplement, 0.05 mg/ml sodium heparin, and 10% v/v fetal bovine serum on plates pre-coated with gelatin. Triplicate cultures derived from the same parent plate or vial obtained from Coriell were maintained in parallel through replicative senescence, which was defined in this study as drastically slowed growth (inability to reach near-confluence at 14 days after previous passage) or viable fraction of cells falling below 60%. Passaging occurred as cells became approximately 90% confluent.


title: ASF1_4

value: 31 years

value: Ambient

value: Full

value: c

value: Fibroblasts were maintained in Eagle’s MEM with Earle’s salts with 10% v/v fetal bovine serum. Triplicate cultures derived from the same parent plate or vial obtained from Coriell were maintained in parallel through replicative senescence, which was defined in this study as drastically slowed growth (inability to reach near-confluence at 14 days after previous passage) or viable fraction of cells falling below 60%. Passaging occurred as cells became approximately 90% confluent.


title: Flash BMNC 0 hr

value: Bone marrow mononuclear cells

value: Thoroughbred

tag: age

value: Adult

value: Flash

value: gelding

value: 0 h - baseline


title: Flash ISF 6

tag: name

value: cultured in inflammed equine synovial fluid

value: 6 days


title: Dreamer SF 96

value: Dreamer

tag: Sex

value: cultured in autologous normal equine synovial fluid

value: 96 hours


title: ASF1_2

value: Baseline profiling

value: male


title: Dreamer SF 48

value: 48 hours


title: MI_D1_RZ_1_22

description:
Smart-seq2
ReadCounts.xlsx

value: MI day1

value: remote

value: single-cardiomyocyte


title: sh_MI_D1_1_70

data_processing:
Raw sequencing reads from single-cardiomyocyte RNA sequencing libraries were trimmed to remove adapter sequences and low-quality bases using fastp-0.20.038 with the parameters “--cut_tail --cut_tail_window_size 10 --cut_tail_mean_quality 30 --length_required 330”.
ReadCounts file generated using featureCounts.

extract_protocol:
Cardiomyocytes were isolated using Langendorff perfusion from the left ventricle as previously described. Enzymatic dissociation using Langendorff perfusion was performed with 35 mL enzyme solution (type 2 collagenase 1 mg/mL [Worthington], protease type XIV 0.05 mg/mL [Sigma-Aldrich], NaCl 130 mM, KCl 5.4 mM, MgCl2 0.5 mM, NaH2PO4 0.33 mM, D-glucose 22 mM, HEPES 25 mM; pH 7.4) pre-heated to 37 °C, at a rate of 3 mL/min. To neutralize enzymatic activity, fetal bovine serum (FBS) was added to the solution to a final concentration of 0.2% (v/v). After perfusion of digestion buffer, left ventricle was cut according to each sectional region (IR, RR) and cardiomyocytes were subsequently isolated. Cell suspensions were filtered through a 100-μm nylon mesh cell strainer and centrifuged at 100 g for 2 min, after which the supernatant was discarded. To prevent hypercontraction, the cardiomyocytes were resuspended in medium (NaCl 130 mM, KCl 5.4 mM, MgCl2 0.5 mM, NaH2PO4 0.33 mM, D-glucose 22 mM, HEPES 25 mM, FBS 0.2%; pH 7.4) containing a low concentration of calcium (0.1 mM). Rod-shaped live cardiomyocytes (viability of cardiomyocytes was ≥80% for all time points) were collected immediately with a 0.2–2-µL pipette (sample volume, 0.5 µL) and incubated in lysis buffer.
Single-cardiomyocyte cDNA libraries were generated using the Smart-seq2 protocol26 and the efﬁciency of reverse transcription was assessed by examining the cycle threshold (Ct) values of control genes (Tnnt2) from quantitative real-time polymerase chain reaction (qRT-PCR) using a CFX96 Real-Time PCR Detection System (Bio-Rad), and the distribution of cDNA fragment lengths was assessed using LabChip GX (Perkin Elmer) and/or TapeStation 2200 (Agilent Technologies). The following primer sets were used for qRT-PCR: Tnnt2 mRNA forward: TCCTGGCAGA GAGGAGGAAG; Tnnt2 mRNA reverse: TGCAGGTCGA ACTTCTCAGC. A Ct value of 25 was set as the threshold. The sequencing libraries were subjected to paired-end 51-bp RNA sequencing on a HiSeq 2730 (Illumina) in rapid mode

value: MI day1_shCsrp3

value: ishchemic + border

value: The clean reads were aligned to the mouse genome (mm10) using STAR (version 2.7.238a)


title: MI_D1_RZ_1_23

description:
Smart-seq2
ReadCounts.xlsx


title: sh_MI_D1_1_7

data_processing:
Raw sequencing reads from single-cardiomyocyte RNA sequencing libraries were trimmed to remove adapter sequences and low-quality bases using fastp-0.20.038 with the parameters “--cut_tail --cut_tail_window_size 10 --cut_tail_mean_quality 30 --length_required 329”.
ReadCounts file generated using featureCounts.

extract_protocol:
Cardiomyocytes were isolated using Langendorff perfusion from the left ventricle as previously described. Enzymatic dissociation using Langendorff perfusion was performed with 35 mL enzyme solution (type 2 collagenase 1 mg/mL [Worthington], protease type XIV 0.05 mg/mL [Sigma-Aldrich], NaCl 130 mM, KCl 5.4 mM, MgCl2 0.5 mM, NaH2PO4 0.33 mM, D-glucose 22 mM, HEPES 25 mM; pH 7.4) pre-heated to 37 °C, at a rate of 3 mL/min. To neutralize enzymatic activity, fetal bovine serum (FBS) was added to the solution to a final concentration of 0.2% (v/v). After perfusion of digestion buffer, left ventricle was cut according to each sectional region (IR, RR) and cardiomyocytes were subsequently isolated. Cell suspensions were filtered through a 100-μm nylon mesh cell strainer and centrifuged at 100 g for 2 min, after which the supernatant was discarded. To prevent hypercontraction, the cardiomyocytes were resuspended in medium (NaCl 130 mM, KCl 5.4 mM, MgCl2 0.5 mM, NaH2PO4 0.33 mM, D-glucose 22 mM, HEPES 25 mM, FBS 0.2%; pH 7.4) containing a low concentration of calcium (0.1 mM). Rod-shaped live cardiomyocytes (viability of cardiomyocytes was ≥80% for all time points) were collected immediately with a 0.2–2-µL pipette (sample volume, 0.5 µL) and incubated in lysis buffer.
Single-cardiomyocyte cDNA libraries were generated using the Smart-seq2 protocol26 and the efﬁciency of reverse transcription was assessed by examining the cycle threshold (Ct) values of control genes (Tnnt2) from quantitative real-time polymerase chain reaction (qRT-PCR) using a CFX96 Real-Time PCR Detection System (Bio-Rad), and the distribution of cDNA fragment lengths was assessed using LabChip GX (Perkin Elmer) and/or TapeStation 2200 (Agilent Technologies). The following primer sets were used for qRT-PCR: Tnnt2 mRNA forward: TCCTGGCAGA GAGGAGGAAG; Tnnt2 mRNA reverse: TGCAGGTCGA ACTTCTCAGC. A Ct value of 25 was set as the threshold. The sequencing libraries were subjected to paired-end 51-bp RNA sequencing on a HiSeq 2729 (Illumina) in rapid mode

value: The clean reads were aligned to the mouse genome (mm10) using STAR (version 2.7.237a)


title: AVSMC1_17

value: 19 years

value: Ambient

value: Full

value: a

value: Vascular smooth muscle cells were maintained in Medium 199 with 1X GlutaMAX, 0.02mg/ml endothelial cell growth supplement, 0.05 mg/ml sodium heparin, and 10% v/v fetal bovine serum on plates pre-coated with gelatin. Triplicate cultures derived from the same parent plate or vial obtained from Coriell were maintained in parallel through replicative senescence, which was defined in this study as drastically slowed growth (inability to reach near-confluence at 14 days after previous passage) or viable fraction of cells falling below 60%. Passaging occurred as cells became approximately 90% confluent.


title: Dreamer SF 10

value: Bone marrow mononuclear cells

value: Thoroughbred

value: Adult

value: Dreamer

value: gelding

value: cultured in autologous normal equine synovial fluid

value: 10 days


title: MI_D1_RZ_1_21

description:
Smart-seq2
ReadCounts.xlsx

value: MI day1

value: remote

value: single-cardiomyocyte


title: sh_MI_D1_1_69

data_processing:
Raw sequencing reads from single-cardiomyocyte RNA sequencing libraries were trimmed to remove adapter sequences and low-quality bases using fastp-0.20.038 with the parameters “--cut_tail --cut_tail_window_size 10 --cut_tail_mean_quality 30 --length_required 328”.
ReadCounts file generated using featureCounts.

extract_protocol:
Cardiomyocytes were isolated using Langendorff perfusion from the left ventricle as previously described. Enzymatic dissociation using Langendorff perfusion was performed with 35 mL enzyme solution (type 2 collagenase 1 mg/mL [Worthington], protease type XIV 0.05 mg/mL [Sigma-Aldrich], NaCl 130 mM, KCl 5.4 mM, MgCl2 0.5 mM, NaH2PO4 0.33 mM, D-glucose 22 mM, HEPES 25 mM; pH 7.4) pre-heated to 37 °C, at a rate of 3 mL/min. To neutralize enzymatic activity, fetal bovine serum (FBS) was added to the solution to a final concentration of 0.2% (v/v). After perfusion of digestion buffer, left ventricle was cut according to each sectional region (IR, RR) and cardiomyocytes were subsequently isolated. Cell suspensions were filtered through a 100-μm nylon mesh cell strainer and centrifuged at 100 g for 2 min, after which the supernatant was discarded. To prevent hypercontraction, the cardiomyocytes were resuspended in medium (NaCl 130 mM, KCl 5.4 mM, MgCl2 0.5 mM, NaH2PO4 0.33 mM, D-glucose 22 mM, HEPES 25 mM, FBS 0.2%; pH 7.4) containing a low concentration of calcium (0.1 mM). Rod-shaped live cardiomyocytes (viability of cardiomyocytes was ≥80% for all time points) were collected immediately with a 0.2–2-µL pipette (sample volume, 0.5 µL) and incubated in lysis buffer.
Single-cardiomyocyte cDNA libraries were generated using the Smart-seq2 protocol26 and the efﬁciency of reverse transcription was assessed by examining the cycle threshold (Ct) values of control genes (Tnnt2) from quantitative real-time polymerase chain reaction (qRT-PCR) using a CFX96 Real-Time PCR Detection System (Bio-Rad), and the distribution of cDNA fragment lengths was assessed using LabChip GX (Perkin Elmer) and/or TapeStation 2200 (Agilent Technologies). The following primer sets were used for qRT-PCR: Tnnt2 mRNA forward: TCCTGGCAGA GAGGAGGAAG; Tnnt2 mRNA reverse: TGCAGGTCGA ACTTCTCAGC. A Ct value of 25 was set as the threshold. The sequencing libraries were subjected to paired-end 51-bp RNA sequencing on a HiSeq 2728 (Illumina) in rapid mode

value: MI day1_shCsrp3

value: ishchemic + border

value: The clean reads were aligned to the mouse genome (mm10) using STAR (version 2.7.236a)


title: MI_D1_RZ_1_20

description:
Smart-seq2
ReadCounts.xlsx


title: Dreamer SF 6

value: 6 days


title: ASF1_1

value: Baseline profiling

value: 31 years

value: male

value: Ambient

value: Full

value: b

value: Fibroblasts were maintained in Eagle’s MEM with Earle’s salts with 10% v/v fetal bovine serum. Triplicate cultures derived from the same parent plate or vial obtained from Coriell were maintained in parallel through replicative senescence, which was defined in this study as drastically slowed growth (inability to reach near-confluence at 14 days after previous passage) or viable fraction of cells falling below 60%. Passaging occurred as cells became approximately 90% confluent.


title: MI_D1_RZ_1_26

description:
Smart-seq2
ReadCounts.xlsx


title: MI_D1_RZ_1_29

description:
Smart-seq2
ReadCounts.xlsx


title: sh_MI_D1_1_73

data_processing:
Raw sequencing reads from single-cardiomyocyte RNA sequencing libraries were trimmed to remove adapter sequences and low-quality bases using fastp-0.20.038 with the parameters “--cut_tail --cut_tail_window_size 10 --cut_tail_mean_quality 30 --length_required 333”.
ReadCounts file generated using featureCounts.

extract_protocol:
Cardiomyocytes were isolated using Langendorff perfusion from the left ventricle as previously described. Enzymatic dissociation using Langendorff perfusion was performed with 35 mL enzyme solution (type 2 collagenase 1 mg/mL [Worthington], protease type XIV 0.05 mg/mL [Sigma-Aldrich], NaCl 130 mM, KCl 5.4 mM, MgCl2 0.5 mM, NaH2PO4 0.33 mM, D-glucose 22 mM, HEPES 25 mM; pH 7.4) pre-heated to 37 °C, at a rate of 3 mL/min. To neutralize enzymatic activity, fetal bovine serum (FBS) was added to the solution to a final concentration of 0.2% (v/v). After perfusion of digestion buffer, left ventricle was cut according to each sectional region (IR, RR) and cardiomyocytes were subsequently isolated. Cell suspensions were filtered through a 100-μm nylon mesh cell strainer and centrifuged at 100 g for 2 min, after which the supernatant was discarded. To prevent hypercontraction, the cardiomyocytes were resuspended in medium (NaCl 130 mM, KCl 5.4 mM, MgCl2 0.5 mM, NaH2PO4 0.33 mM, D-glucose 22 mM, HEPES 25 mM, FBS 0.2%; pH 7.4) containing a low concentration of calcium (0.1 mM). Rod-shaped live cardiomyocytes (viability of cardiomyocytes was ≥80% for all time points) were collected immediately with a 0.2–2-µL pipette (sample volume, 0.5 µL) and incubated in lysis buffer.
Single-cardiomyocyte cDNA libraries were generated using the Smart-seq2 protocol26 and the efﬁciency of reverse transcription was assessed by examining the cycle threshold (Ct) values of control genes (Tnnt2) from quantitative real-time polymerase chain reaction (qRT-PCR) using a CFX96 Real-Time PCR Detection System (Bio-Rad), and the distribution of cDNA fragment lengths was assessed using LabChip GX (Perkin Elmer) and/or TapeStation 2200 (Agilent Technologies). The following primer sets were used for qRT-PCR: Tnnt2 mRNA forward: TCCTGGCAGA GAGGAGGAAG; Tnnt2 mRNA reverse: TGCAGGTCGA ACTTCTCAGC. A Ct value of 25 was set as the threshold. The sequencing libraries were subjected to paired-end 51-bp RNA sequencing on a HiSeq 2733 (Illumina) in rapid mode

value: The clean reads were aligned to the mouse genome (mm10) using STAR (version 2.7.241a)


title: sh_MI_D1_1_71

data_processing:
Raw sequencing reads from single-cardiomyocyte RNA sequencing libraries were trimmed to remove adapter sequences and low-quality bases using fastp-0.20.038 with the parameters “--cut_tail --cut_tail_window_size 10 --cut_tail_mean_quality 30 --length_required 331”.
ReadCounts file generated using featureCounts.

extract_protocol:
Cardiomyocytes were isolated using Langendorff perfusion from the left ventricle as previously described. Enzymatic dissociation using Langendorff perfusion was performed with 35 mL enzyme solution (type 2 collagenase 1 mg/mL [Worthington], protease type XIV 0.05 mg/mL [Sigma-Aldrich], NaCl 130 mM, KCl 5.4 mM, MgCl2 0.5 mM, NaH2PO4 0.33 mM, D-glucose 22 mM, HEPES 25 mM; pH 7.4) pre-heated to 37 °C, at a rate of 3 mL/min. To neutralize enzymatic activity, fetal bovine serum (FBS) was added to the solution to a final concentration of 0.2% (v/v). After perfusion of digestion buffer, left ventricle was cut according to each sectional region (IR, RR) and cardiomyocytes were subsequently isolated. Cell suspensions were filtered through a 100-μm nylon mesh cell strainer and centrifuged at 100 g for 2 min, after which the supernatant was discarded. To prevent hypercontraction, the cardiomyocytes were resuspended in medium (NaCl 130 mM, KCl 5.4 mM, MgCl2 0.5 mM, NaH2PO4 0.33 mM, D-glucose 22 mM, HEPES 25 mM, FBS 0.2%; pH 7.4) containing a low concentration of calcium (0.1 mM). Rod-shaped live cardiomyocytes (viability of cardiomyocytes was ≥80% for all time points) were collected immediately with a 0.2–2-µL pipette (sample volume, 0.5 µL) and incubated in lysis buffer.
Single-cardiomyocyte cDNA libraries were generated using the Smart-seq2 protocol26 and the efﬁciency of reverse transcription was assessed by examining the cycle threshold (Ct) values of control genes (Tnnt2) from quantitative real-time polymerase chain reaction (qRT-PCR) using a CFX96 Real-Time PCR Detection System (Bio-Rad), and the distribution of cDNA fragment lengths was assessed using LabChip GX (Perkin Elmer) and/or TapeStation 2200 (Agilent Technologies). The following primer sets were used for qRT-PCR: Tnnt2 mRNA forward: TCCTGGCAGA GAGGAGGAAG; Tnnt2 mRNA reverse: TGCAGGTCGA ACTTCTCAGC. A Ct value of 25 was set as the threshold. The sequencing libraries were subjected to paired-end 51-bp RNA sequencing on a HiSeq 2731 (Illumina) in rapid mode

value: The clean reads were aligned to the mouse genome (mm10) using STAR (version 2.7.239a)