Exposure to normobaric hypoxia shapes the acute inflammatory response in human whole blood cells in vivo
Pflugers Archiv European Journal of Physiology, ISSN: 1432-2013, Vol: 476, Issue: 9, Page: 1369-1381
2024
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Most Recent News
University of Duisburg-Essen Reports Findings in Genomics and Genetics (Exposure to normobaric hypoxia shapes the acute inflammatory response in human whole blood cells in vivo)
2024 MAY 20 (NewsRx) -- By a News Reporter-Staff News Editor at Chemicals & Chemistry Daily Daily -- New research on Genomics and Genetics is
Article Description
Cells of the immune defence, especially leukocytes, often have to perform their function in tissue areas that are characterized by oxygen deficiency, so-called hypoxia. Physiological hypoxia significantly affects leukocyte function and controls the innate and adaptive immune response mainly through transcriptional gene regulation via the hypoxia-inducible factors (HIFs). Multiple pathogens including components of bacteria, such as lipopolysaccharides (LPS) trigger the activation of leukocytes. HIF pathway activation enables immune cells to adapt to both hypoxic environments in physiological and inflammatory settings and modulates immune cell responses through metabolism changes and crosstalk with other immune-relevant signalling pathways. To study the mutual influence of both processes in vivo, we used a human endotoxemia model, challenging participants with an intravenous LPS injection post or prior to a 4-h stay in a hypoxic chamber with normobaric hypoxia of 10.5% oxygen. We analysed changes in gene expression in whole blood cells and determined inflammatory markers to unveil the crosstalk between both processes. Our investigations showed differentially altered gene expression patterns of HIF and target genes upon in vivo treatment with LPS and hypoxia. Further, we found evidence for effects of hypoxic priming upon inflammation in combination with immunomodulatory effects in whole blood cells in vivo. Our work elucidates the complex interplay of hypoxic and inflammatory HIF regulation in human immune cells and offers new perspectives for further clinical research.
Bibliographic Details
http://www.scopus.com/inward/record.url?partnerID=HzOxMe3b&scp=85192344901&origin=inward; http://dx.doi.org/10.1007/s00424-024-02969-2; http://www.ncbi.nlm.nih.gov/pubmed/38714572; https://link.springer.com/10.1007/s00424-024-02969-2; https://dx.doi.org/10.1007/s00424-024-02969-2; https://link.springer.com/article/10.1007/s00424-024-02969-2
Springer Science and Business Media LLC
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