PMID- 22811423 OWN - NLM STAT- MEDLINE DCOM- 20120925 LR - 20220408 IS - 1522-1210 (Electronic) IS - 0031-9333 (Print) IS - 0031-9333 (Linking) VI - 92 IP - 3 DP - 2012 Jul TI - Adaptive and maladaptive cardiorespiratory responses to continuous and intermittent hypoxia mediated by hypoxia-inducible factors 1 and 2. PG - 967-1003 LID - 10.1152/physrev.00030.2011 [doi] AB - Hypoxia is a fundamental stimulus that impacts cells, tissues, organs, and physiological systems. The discovery of hypoxia-inducible factor-1 (HIF-1) and subsequent identification of other members of the HIF family of transcriptional activators has provided insight into the molecular underpinnings of oxygen homeostasis. This review focuses on the mechanisms of HIF activation and their roles in physiological and pathophysiological responses to hypoxia, with an emphasis on the cardiorespiratory systems. HIFs are heterodimers comprised of an O(2)-regulated HIF-1alpha or HIF-2alpha subunit and a constitutively expressed HIF-1beta subunit. Induction of HIF activity under conditions of reduced O(2) availability requires stabilization of HIF-1alpha and HIF-2alpha due to reduced prolyl hydroxylation, dimerization with HIF-1beta, and interaction with coactivators due to decreased asparaginyl hydroxylation. Stimuli other than hypoxia, such as nitric oxide and reactive oxygen species, can also activate HIFs. HIF-1 and HIF-2 are essential for acute O(2) sensing by the carotid body, and their coordinated transcriptional activation is critical for physiological adaptations to chronic hypoxia including erythropoiesis, vascularization, metabolic reprogramming, and ventilatory acclimatization. In contrast, intermittent hypoxia, which occurs in association with sleep-disordered breathing, results in an imbalance between HIF-1alpha and HIF-2alpha that causes oxidative stress, leading to cardiorespiratory pathology. FAU - Prabhakar, Nanduri R AU - Prabhakar NR AD - Institute for Integrative Physiology and Center for Systems Biology of O2 Sensing, Biological Sciences Division, University of Chicago, Chicago, Illinois, USA. nanduri@uchicago.edu FAU - Semenza, Gregg L AU - Semenza GL LA - eng GR - R01 HL076537/HL/NHLBI NIH HHS/United States GR - HL-86493/HL/NHLBI NIH HHS/United States GR - P01-HL-65608/HL/NHLBI NIH HHS/United States GR - U54 CA143868/CA/NCI NIH HHS/United States GR - HL-76537/HL/NHLBI NIH HHS/United States GR - R01-HL-55338/HL/NHLBI NIH HHS/United States GR - U54-CA-143868/CA/NCI NIH HHS/United States GR - P01 HL025830/HL/NHLBI NIH HHS/United States GR - P01 HL090554/HL/NHLBI NIH HHS/United States GR - P20 GM078494/GM/NIGMS NIH HHS/United States GR - P01 HL065608/HL/NHLBI NIH HHS/United States GR - P20-GM-78494/GM/NIGMS NIH HHS/United States GR - HL-90554/HL/NHLBI NIH HHS/United States GR - R01 HL086493/HL/NHLBI NIH HHS/United States GR - HHS-N268201000032C/PHS HHS/United States GR - R01 HL055338/HL/NHLBI NIH HHS/United States PT - Journal Article PT - Research Support, N.I.H., Extramural PT - Research Support, Non-U.S. Gov't PT - Review PL - United States TA - Physiol Rev JT - Physiological reviews JID - 0231714 RN - 0 (Basic Helix-Loop-Helix Transcription Factors) RN - 0 (Hypoxia-Inducible Factor 1) RN - 0 (Hypoxia-Inducible Factor 1, alpha Subunit) RN - 138391-32-9 (Aryl Hydrocarbon Receptor Nuclear Translocator) RN - 1B37H0967P (endothelial PAS domain-containing protein 1) RN - S88TT14065 (Oxygen) SB - IM MH - Adaptation, Physiological MH - Animals MH - Aryl Hydrocarbon Receptor Nuclear Translocator/metabolism MH - Basic Helix-Loop-Helix Transcription Factors/genetics/*metabolism MH - Blood Vessels/metabolism/physiopathology MH - Cardiovascular Diseases/*etiology/genetics/metabolism/physiopathology/prevention & control MH - Carotid Body/metabolism MH - Erythropoiesis MH - Gene Expression Regulation MH - Humans MH - Hypoxia/*complications/genetics/metabolism/physiopathology MH - Hypoxia-Inducible Factor 1/genetics/*metabolism MH - Hypoxia-Inducible Factor 1, alpha Subunit/metabolism MH - Ischemic Preconditioning, Myocardial MH - Oxidative Stress MH - Oxygen/blood MH - Pulmonary Ventilation MH - Respiration Disorders/*etiology/genetics/metabolism/physiopathology MH - Signal Transduction PMC - PMC3893888 MID - NIHMS523779 EDAT- 2012/07/20 06:00 MHDA- 2012/09/26 06:00 PMCR- 2014/01/16 CRDT- 2012/07/20 06:00 PHST- 2012/07/20 06:00 [entrez] PHST- 2012/07/20 06:00 [pubmed] PHST- 2012/09/26 06:00 [medline] PHST- 2014/01/16 00:00 [pmc-release] AID - 92/3/967 [pii] AID - 10.1152/physrev.00030.2011 [doi] PST - ppublish SO - Physiol Rev. 2012 Jul;92(3):967-1003. doi: 10.1152/physrev.00030.2011.