GSM5738377: RNA_ab_5dpi_ha1; Mesocricetus auratus; RNA-Seq
For isolation of single cells lobus caudalis of the right lung was removed and placed in storage medium (1× PBS, 0.5 % BSA) until further processing. Storage and isolation media contained 2 µg/mL ActinomycinD. Tissues and cells were always spun at 350 x g for 6 minutes at 4 °C. Mechanical dissociation of lung lobes was achieved by clapping motions with tweezers for 2 minutes in enzymatic digestion medium (3,4 mg/mL Collagenase Cls II (Merck), 1 mg/mL DNase I (PanReac AppliChem), in 2 mL Dispase medium per lung lobe (Corning), 50 Caseinolytic Units/mL followed by 30 minutes incubation at 37°C and 5 % CO2. Further tissue dissociation was achieved by repeated pipetting of digested lung tissue with 5 mL pipettes and passing of cell suspension with plungers through 70 µm cell strainers. Cells were pelleted from suspension by centrifugation and resuspended in red blood cell lysis buffer (BioLegend). Lysis reaction was stopped and cells washed with excessive volumes of PBS/BSA. Cells were centrifuged, resuspended in low-BSA buffer (1× PBS, 0.04 % BSA) and counted via hemocytometer and trypan blue. Then, 1,000,000 lung cells per sample were subjected to Cell Multiplexing Oligo (CMO) labeling according to the manufacturers' instructions (3ʹ-CellPlex-Kit-Set-A, 10x Genomics). Labelled cells from 12 samples were pooled, filtered (40 µm) and counted. Pooled cells were adjusted to a final concentration of ~1,600 cells / μL and filtered with 40 µm FloMi filters (Merck) suitable for low volumes prior subjection to scRNA sequencing. For Lung RNA Bulk sequencing the lobus medialis of the right lung lobe was removed carefully and homogenzied in Trizol reagent using a bead mill procedure (Speedmill, Analytic Jena), RNA was extracted according to the manufacturer's instructions. Bulk and single-cell RNA-sequencing libraries were constructed using commercial kits (New England Biolabs, 10xGenomics), see column "library construction protocol" in the SAMPLES section.