title: Differential gene expression of aldolase C (ALDOC) and hypoxic adaptation in chickens.
abstract: Two sequence variants of the aldolase C (ALDOC) gene were discovered based on comparison of the sequences from an altiplano chicken breed (Tibetan chicken) and two lowland breeds (White Leghorn and ShouGuang). Gel-shift results indicated that one of these variants, L25375:c.310-258G>A, was able to bind hypoxia-induced factor-l (HIF1A), therefore, functioning as a hypoxia response element (HRE). The combined activity of the HRE and HIF1A could increase under the influence of a hypoxic stimulus. Hypoxia leads to increased death rates of chicken embryos, while the L25375:c.310-258G>A described herein is prevalent in healthy embryos grown under hypoxic conditions. Fluorescence quantitative real-time PCR results revealed that HIF1A upregulated the transcript level of the glycolytic enzyme ALDOC in the brain and skeletal muscle of animals subjected to hypoxia. Thus, a large amount of ATP is produced by increased glycolysis, allowing the organism to meet energy metabolism demands. As such, we believe this sequence variant is an adaptation to external anoxic environment.
authors.affiliation: College of Animal Science and Technology, China Agricultural University, Beijing, 100094, China.
authors.forename: C F
authors.initials: CF
authors.lastname: Wang
authors.forename: C Z
authors.initials: CZ
authors.lastname: Yuan
authors.forename: S H
authors.initials: SH
authors.lastname: Wang
authors.forename: H
authors.initials: H
authors.lastname: Zhang
authors.forename: X X
authors.initials: XX
authors.lastname: Hu
authors.forename: L
authors.initials: L
authors.lastname: Zhang
authors.forename: C
authors.initials: C
authors.lastname: Wu
authors.forename: N
authors.initials: N
authors.lastname: Li
mesh_terms: D000222:Adaptation, Physiological / Q000235:genetics*; D000818:Animals; D001483:Base Sequence; D001921:Brain / Q000378:metabolism; D002645:Chickens / Q000235:genetics*; D017931:DNA Primers; D024202:Electrophoretic Mobility Shift Assay; D005634:Fructose-Bisphosphate Aldolase / Q000235:genetics / Q000378:metabolism*; D005786:Gene Expression Regulation / Q000235:genetics*; D000860:Hypoxia / Q000378:metabolism*; D051793:Hypoxia-Inducible Factor 1 / Q000378:metabolism*; D008969:Molecular Sequence Data; D018482:Muscle, Skeletal / Q000378:metabolism; D009841:Oligonucleotides; D020133:Reverse Transcriptase Polymerase Chain Reaction; D017422:Sequence Analysis, DNA
chemical_list: D017931:DNA Primers; D051793:Hypoxia-Inducible Factor 1; D009841:Oligonucleotides; D005634:Fructose-Bisphosphate Aldolase