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The role of nitrogen oxides in human adaptation to hypoxia

Record type: Article

Lowland residents adapt to the reduced oxygen availability at high altitude through a process known as acclimatisation, but the molecular changes underpinning these functional alterations are not well understood. Using an integrated biochemical/whole-body physiology approach we here show that plasma biomarkers of NO production (nitrite, nitrate) and activity (cGMP) are elevated on acclimatisation to high altitude while S-nitrosothiols are initially consumed, suggesting multiple nitrogen oxides contribute to improve hypoxia tolerance by enhancing NO availability. Unexpectedly, oxygen cost of exercise and mechanical efficiency remain unchanged with ascent while microvascular blood flow correlates inversely with nitrite. Our results suggest that NO is an integral part of the human physiological response to hypoxia. These findings may be of relevance not only to healthy subjects exposed to high altitude but also to patients in whom oxygen availability is limited through disease affecting the heart, lung or vasculature, and to the field of developmental biology.

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Citation

Levett, Denny Z., Fernandez, Bernadette O., Riley, Heather L., Martin, Daniel S., Mitchell, Kay, Leckstrom, Carl A., Ince, Can, Whipp, Brian J., Mythen, Monty G., Montgomery, Hugh E., Grocott, Mike P. and Feelisch, Martin (2011) The role of nitrogen oxides in human adaptation to hypoxia Scientific Reports, 1, (109) (doi:10.1038/srep00109). (PMID:22355626).

More information

Published date: 6 October 2011
Keywords: evolution, medical research, physiology, chemical biology
Organisations: Clinical & Experimental Sciences

Identifiers

Local EPrints ID: 340903
URI: http://eprints.soton.ac.uk/id/eprint/340903
PURE UUID: 7895ac6e-a5cc-4ea9-89d4-1e9f9c76043a
ORCID for Martin Feelisch: ORCID iD orcid.org/0000-0003-2320-1158

Catalogue record

Date deposited: 06 Jul 2012 11:22
Last modified: 18 Jul 2017 05:40

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Contributors

Author: Denny Z. Levett
Author: Bernadette O. Fernandez
Author: Heather L. Riley
Author: Daniel S. Martin
Author: Kay Mitchell
Author: Carl A. Leckstrom
Author: Can Ince
Author: Brian J. Whipp
Author: Monty G. Mythen
Author: Hugh E. Montgomery
Author: Mike P. Grocott
Author: Martin Feelisch ORCID iD

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