Cited by 57Ion Transport and Channel RegulationRespiratory Support and MechanismsHigh Altitude and Hypoxia

Regulation of alveolar epithelial function by hypoxia

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Zhou, G., Dada, L. A., Sznajder, J. I.·2008·European Respiratory Journal

Abstract

Patients with acute respiratory distress syndrome and high-altitude pulmonary oedema build up excess lung fluid, which leads to alveolar hypoxia. In patients with acute respiratory distress syndrome and hypoxia, there is a decrease in oedema fluid clearance, due in part to the downregulation of plasma membrane sodium-potassium adenosine triphosphatase (Na,K-ATPase). In alveolar epithelial cells, acute hypoxia promotes Na,K-ATPase endocytosis from the plasma membrane to intracellular compartments, resulting in inhibition of Na,K-ATPase activity. Exposure to prolonged hypoxia leads to degradation of plasma membrane Na,K-ATPase. The downregulation of plasma membrane Na,K-ATPase reduces adenosine triphosphate demand, as part of a survival mechanism of cellular adaptation to hypoxia. Hypoxia has also been shown to disassemble and degrade the keratin intermediate filament network, a fundamental component of the cell cytoskeleton, affecting epithelial barrier function. Accordingly, better understanding of the mechanisms regulating cellular adaptation to hypoxia may lead to the development of novel therapeutic strategies for acute respiratory distress syndrome and high-altitude pulmonary oedema patients.

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Research works printed but not linked: 4

  1. Ivan M, Kondo K, Yang H, et al. HIFa targeted for VHL- mediated destruction by proline hydroxylation: implica- tions for O 2 sensing. Science 2001; 292: 464-468.
  2. Zhou G, Dada L, Lecuona E, et al. Hypoxia-mediated degradation of Na,K-ATPase is von Hippel-Lindau pro- tein dependent but HIF independent. Proc Am Thorac Soc 2006; 3: A692.
  3. Steinert PM, Jones JC, Goldman RD. Intermediate fila- ments. J Cell Biol 1984; 99: 22s-27s.
  4. Ridge K. Insights into the cellular mechanisms responsible for hypoxia-induced lung injury: disassembly of the keratin intermediate filament network in alveolar epithe- lial cells. Proc Am Thorac Soc 2005; 2: A825.

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Authors
Zhou, G., Dada, L. A., & Sznajder, J. I.
Affiliations
Northwestern University (US)
Venue
European Respiratory Journal
Published
2008-04-30
Volume
31
Issue
5
Pages
1107-1113
ISSN
  • 0903-1936 (ISSN-L)
  • 1399-3003
OpenAlex
W2101358905
Cited by
57
References
91
Citations by year
2026: 3 · 2025: 2 · 2024: 3 · 2023: 3 · 2022: 2 · 2021: 2 · 2019: 1 · 2018: 2 · 2017: 6 · 2016: 4 · 2015: 1 · 2014: 4 · 2013: 5 · 2012: 5
FWCI
0.36
Type
journal article
Language
en
Open access
Locations
  • European Respiratory Journal (publishedVersion)
  • PubMed (publishedVersion)
Funders
  • Northwestern University
  • National Institutes of Health (HL-071643)
  • Feinberg School of Medicine
  • National Heart, Lung, and Blood Institute (HL 48129, P01HL071643, HL 071643)
Topics
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Ion Transport and Channel Regulation
  • Health Sciences › Medicine › Pulmonary and Respiratory Medicine › Respiratory Support and Mechanisms
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Genetics › High Altitude and Hypoxia
Keywords
alveolar epithelial cells, hypoxia, acute respiratory distress syndrome, high altitude pulmonary edema, alveolar hypoxia, Na+/K+-ATPase, epithelial barrier function, keratin intermediate filaments, cytoskeleton, alveolar edema
MeSH terms
Sodium-Potassium-Exchanging ATPase, Hypoxia, Cell Membrane, Epithelial Cells, Humans, Intermediate Filaments, Pulmonary Alveoli, Pulmonary Edema, Respiratory Distress Syndrome

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