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PMID:9436976

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Citation

Iyer, NV, Kotch, LE, Agani, F, Leung, SW, Laughner, E, Wenger, RH, Gassmann, M, Gearhart, JD, Lawler, AM, Yu, AY and Semenza, GL (1998) Cellular and developmental control of O2 homeostasis by hypoxia-inducible factor 1 alpha. Genes Dev. 12:149-62

Abstract

Hypoxia is an essential developmental and physiological stimulus that plays a key role in the pathophysiology of cancer, heart attack, stroke, and other major causes of mortality. Hypoxia-inducible factor 1 (HIF-1) is the only known mammalian transcription factor expressed uniquely in response to physiologically relevant levels of hypoxia. We now report that in Hif1a-/- embryonic stem cells that did not express the O2-regulated HIF-1alpha subunit, levels of mRNAs encoding glucose transporters and glycolytic enzymes were reduced, and cellular proliferation was impaired. Vascular endothelial growth factor mRNA expression was also markedly decreased in hypoxic Hif1a-/- embryonic stem cells and cystic embryoid bodies. Complete deficiency of HIF-1alpha resulted in developmental arrest and lethality by E11 of Hif1a-/- embryos that manifested neural tube defects, cardiovascular malformations, and marked cell death within the cephalic mesenchyme. In Hif1a+/+ embryos, HIF-1alpha expression increased between E8.5 and E9.5, coincident with the onset of developmental defects and cell death in Hif1a-/- embryos. These results demonstrate that HIF-1alpha is a master regulator of cellular and developmental O2 homeostasis.

Links

PubMed PMC316445

Keywords

Animals; Antigens, CD31/analysis; Blood Vessels/embryology; Cell Division/genetics; Cell Respiration/genetics; Cell Respiration/physiology; Cells, Cultured; DNA-Binding Proteins/genetics; DNA-Binding Proteins/metabolism; DNA-Binding Proteins/physiology; Embryo, Mammalian/metabolism; Embryo, Mammalian/pathology; Endothelial Growth Factors/genetics; Homeostasis/physiology; Hypoxia-Inducible Factor 1; Hypoxia-Inducible Factor 1, alpha Subunit; Immunoblotting; Immunohistochemistry; Lymphokines/genetics; Mice; Mice, Inbred C57BL; Mice, Knockout; Nuclear Proteins/genetics; Nuclear Proteins/metabolism; Nuclear Proteins/physiology; Oxygen/metabolism; RNA, Messenger/analysis; Stem Cells/metabolism; Time Factors; Transcription Factors/physiology; Vascular Endothelial Growth Factor A; Vascular Endothelial Growth Factors

Significance

Annotations

Gene product Qualifier GO Term Evidence Code with/from Aspect Extension Notes Status

MOUSE:HIF1A

acts_upstream_of_or_within

GO:0001568: blood vessel development

ECO:0000315: mutant phenotype evidence used in manual assertion

MGI:MGI:1857719

P

  • occurs_in:(EMAPA:16104)

Seeded From UniProt

complete

MOUSE:HIF1A

acts_upstream_of_or_within

GO:0003208: cardiac ventricle morphogenesis

ECO:0000315: mutant phenotype evidence used in manual assertion

MGI:MGI:1857719

P

Seeded From UniProt

complete

MOUSE:HIF1A

acts_upstream_of_or_within

GO:0003151: outflow tract morphogenesis

ECO:0000315: mutant phenotype evidence used in manual assertion

MGI:MGI:1857719

P

Seeded From UniProt

complete

MOUSE:HIF1A

acts_upstream_of_or_within

GO:0001568: blood vessel development

ECO:0000315: mutant phenotype evidence used in manual assertion

MGI:MGI:1857719

P

occurs_in:(EMAPA:16104)

Seeded From UniProt

complete

MOUSE:HIF1A

acts_upstream_of_or_within

GO:0032364: oxygen homeostasis

ECO:0000315: mutant phenotype evidence used in manual assertion

MGI:MGI:1857719

P

Seeded From UniProt

complete

MOUSE:HIF1A

acts_upstream_of_or_within

GO:0003208: cardiac ventricle morphogenesis

ECO:0000315: mutant phenotype evidence used in manual assertion

MGI:MGI:1857719

P

has_participant:(EMAPA:16350)

Seeded From UniProt

complete

MOUSE:HIF1A

acts_upstream_of_or_within

GO:0003151: outflow tract morphogenesis

ECO:0000315: mutant phenotype evidence used in manual assertion

MGI:MGI:1857719

P

has_participant:(EMAPA:16346)

Seeded From UniProt

complete


See also

References

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