title: Molecular cloning of cDNAs encoding hypoxia-inducible factor (HIF)-1alpha and -2alpha of bovine arterial endothelial cells.
abstract: Hypoxia-inducible factor (HIF)-1alpha and -2alpha are two basic helix-loop-helix/PAS domain transcriptional factors that mediate hypoxia-induced gene expression. We found that bovine arterial endothelial cells (BAEC) expressed both HIF-1alpha and -2alpha by RT-PCR and then isolated cDNAs encoding these two transcriptional factors of BAEC. The deduced amino acid sequences of both HIF-1alpha and -2alpha showed high homologies among mammalian species. Northern blot analysis indicated that the mRNAs for HIF-1alpha and -2alpha from BAEC showed a size of approx. 5.5 and 6.2 kilobases, respectively and that both mRNAs were constitutively expressed and not induced by hypoxia in BAEC.
mesh_terms: D000595:Amino Acid Sequence; D000818:Animals; D001483:Base Sequence; D051792:Basic Helix-Loop-Helix Proteins; D002417:Cattle; D002478:Cells, Cultured; D003001:Cloning, Molecular; D018076:DNA, Complementary / Q000737:chemistry* / Q000302:isolation & purification; D004268:DNA-Binding Proteins; D004730:Endothelium, Vascular / Q000378:metabolism*; D005786:Gene Expression Regulation; D051793:Hypoxia-Inducible Factor 1; D051795:Hypoxia-Inducible Factor 1, alpha Subunit; D008969:Molecular Sequence Data; D009687:Nuclear Proteins; D016415:Sequence Alignment; D015534:Trans-Activators / Q000235:genetics* / Q000378:metabolism*; D014157:Transcription Factors; D000099162:Endothelial PAS Domain-Containing Protein 1