Up-regualtion of gene expression by hypoxia is mediated predominantly by hypoxia-inducible factor I (HIF-I)

A. E. Greijer, P. van der Groep, D. Kemming, A. Shvarts, G. L. Semenza, G. A. Meijer, M. A. van de Wiel, J. A.M. Belien, Paulus Joannes van Diest, Elsken van der Wall

Research output: Contribution to journalArticlepeer-review

Abstract

The hypoxia-inducible factor 1 (HIF-1) plays a critical role in cellular responses to hypoxia. The aim of the present study was to evaluate which genes are induced by hypoxia, and whether this induction is mediated by HIF-1, by expression microarray analysis of wt and HIF-1α null mouse fibroblasts. Forty-five genes were up-regulated by hypoxia and 40 (89%) of these were regulated by HIF-1. Of the 114 genes down-regulated by hypoxia, 19 (17%) were HIF-1-dependent. All glycolytic enzymes were strongly up-regulated by hypoxia in a HIF-1-dependent manner. Genes already known to be related to hypoxia, such as glucose transporter 1, BNIP3, and hypoxia-induced gene 1, were induced. In addition, multiple new HIF-1-regulated genes were identified, including genes involved in metabolism (adenylate kinase 4, galactokinase), apoptosis (galectin-3 and gelsolin), and invasion (RhoA). Genes down-regulated by hypoxia were involved in cytoskeleton maintenance (Rho kinase), mRNA processing (heterogeneous nuclear ribonucleoprotein H1 and splicing factor), and DNA repair (REV3). Furthermore, seven cDNAs from genes with unknown function or expressed sequence tags (ESTs) were up-regulated and 27 such cDNAs were down-regulated. In conclusion, hypoxia causes down- rather than up-regulation of gene expression and HIF-1 seems to play a major role in the regulation of hypoxia-induced genes.

Original languageEnglish (US)
Pages (from-to)291-304
Number of pages14
JournalJournal of Pathology
Volume206
Issue number3
DOIs
StatePublished - Jul 1 2005

Keywords

  • HIF-1
  • Hypoxia
  • Hypoxia-inducible factor 1
  • Microarray analysis
  • Mouse fibroblasts
  • RNA profiling

ASJC Scopus subject areas

  • Pathology and Forensic Medicine

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