The role of hemoglobin oxygen affinity in oxygen transport at high altitude

Abstract Hemoglobin is involved in the regulation of O2 transport in two ways: a long-term adjustment in red cell mass is mediated by erythropoietin (EPO), a response to renal oxgyenation. Short-term, rapid-response adjustments are mediated by ventilation, cardiac output, hemoglobin oxygen affinity...

Ausführliche Beschreibung

Gespeichert in:
Bibliographische Detailangaben
Veröffentlicht in:Respiratory physiology & neurobiology 2007-09, Vol.158 (2), p.121-127
1. Verfasser: Winslow, Robert M
Format: Artikel
Sprache:eng
Schlagworte:
Online-Zugang:Volltext
Tags: Tag hinzufügen
Keine Tags, Fügen Sie den ersten Tag hinzu!
container_end_page 127
container_issue 2
container_start_page 121
container_title Respiratory physiology & neurobiology
container_volume 158
creator Winslow, Robert M
description Abstract Hemoglobin is involved in the regulation of O2 transport in two ways: a long-term adjustment in red cell mass is mediated by erythropoietin (EPO), a response to renal oxgyenation. Short-term, rapid-response adjustments are mediated by ventilation, cardiac output, hemoglobin oxygen affinity (P50), barriers to O2 diffusion, and the control of local microvascular tissue perfusion. The distribution of O2 between dissolved ( P O 2 ) and hemoglobin-bound (saturation) is the familiar oxygen equilibrium curve, whose position is noted as P50. Human hemoglobin is not genetically adapted for function at high altitude. However, more specialized species native to high altitudes (guinea pig and bar-headed goose, for example) seem to have a lower P50 than their sea level counterparts, an adaptation that presumably promotes O2 uptake from a hypoxic environment. Humans, native to very high altitude either in the Andes or Himalayan mountains, also can increase O2 affinity, not because of a fundamental difference in hemoglobin structure or function, but because of extreme hyperventilation and alkalosis.
doi_str_mv 10.1016/j.resp.2007.03.011
format Article
fullrecord <record><control><sourceid>proquest_cross</sourceid><recordid>TN_cdi_proquest_miscellaneous_68309323</recordid><sourceformat>XML</sourceformat><sourcesystem>PC</sourcesystem><els_id>1_s2_0_S1569904807001097</els_id><sourcerecordid>68309323</sourcerecordid><originalsourceid>FETCH-LOGICAL-c409t-753e45c86128474243daf5ac749fd95b3527b096574078a17ac644b5d2265a0a3</originalsourceid><addsrcrecordid>eNp9kU-LFDEQxYMo7rr6BTxIn7x1W_nX6YAIsriruODB9RzS6eqZjD2dMUkvzrc3zQwseNhTFcV7D-r3CHlLoaFA2w-7JmI6NAxANcAboPQZuaSd6moqqX5edtnqWoPoLsirlHYAVFHFX5ILqoTQnLeX5Pv9FqsYJqzCWG1xHzZT6P1chb_HDc6VHUc_-3ysHk852jkdQsyVzdXWb7aVnbLPy4CvyYvRTgnfnOcV-XXz5f76a3334_bb9ee72gnQuVaSo5CuaynrhBJM8MGO0jol9Dho2XPJVA-6lUqA6ixV1rVC9HJgrJUWLL8i70-5hxj-LJiy2fvkcJrsjGFJpu04aM54EbKT0MWQUsTRHKLf23g0FMyK0OzMitCsCA1wUxAW07tz-tLvcXi0nJkVwceTAMuPDx6jSc7j7HDwEV02Q_BP53_6z-6mwtjZ6TceMe3CEudCz1CTmAHzcy1x7RBU6Q-04v8A0i6WaQ</addsrcrecordid><sourcetype>Aggregation Database</sourcetype><iscdi>true</iscdi><recordtype>article</recordtype><pqid>68309323</pqid></control><display><type>article</type><title>The role of hemoglobin oxygen affinity in oxygen transport at high altitude</title><source>MEDLINE</source><source>Access via ScienceDirect (Elsevier)</source><creator>Winslow, Robert M</creator><creatorcontrib>Winslow, Robert M</creatorcontrib><description>Abstract Hemoglobin is involved in the regulation of O2 transport in two ways: a long-term adjustment in red cell mass is mediated by erythropoietin (EPO), a response to renal oxgyenation. Short-term, rapid-response adjustments are mediated by ventilation, cardiac output, hemoglobin oxygen affinity (P50), barriers to O2 diffusion, and the control of local microvascular tissue perfusion. The distribution of O2 between dissolved ( P O 2 ) and hemoglobin-bound (saturation) is the familiar oxygen equilibrium curve, whose position is noted as P50. Human hemoglobin is not genetically adapted for function at high altitude. However, more specialized species native to high altitudes (guinea pig and bar-headed goose, for example) seem to have a lower P50 than their sea level counterparts, an adaptation that presumably promotes O2 uptake from a hypoxic environment. Humans, native to very high altitude either in the Andes or Himalayan mountains, also can increase O2 affinity, not because of a fundamental difference in hemoglobin structure or function, but because of extreme hyperventilation and alkalosis.</description><identifier>ISSN: 1569-9048</identifier><identifier>EISSN: 1878-1519</identifier><identifier>DOI: 10.1016/j.resp.2007.03.011</identifier><identifier>PMID: 17449336</identifier><language>eng</language><publisher>Netherlands: Elsevier B.V</publisher><subject>Acclimatization - physiology ; Altitude ; Altitude Sickness - blood ; Animals ; Atmospheric Pressure ; Biological Evolution ; Erythrocytes - enzymology ; Hemoglobin ; Hemoglobins - metabolism ; Humans ; Medical Education ; Oxygen - blood ; Oxygen transport ; P50 ; Pulmonary/Respiratory</subject><ispartof>Respiratory physiology &amp; neurobiology, 2007-09, Vol.158 (2), p.121-127</ispartof><rights>Elsevier B.V.</rights><rights>2007 Elsevier B.V.</rights><lds50>peer_reviewed</lds50><woscitedreferencessubscribed>false</woscitedreferencessubscribed><citedby>FETCH-LOGICAL-c409t-753e45c86128474243daf5ac749fd95b3527b096574078a17ac644b5d2265a0a3</citedby><cites>FETCH-LOGICAL-c409t-753e45c86128474243daf5ac749fd95b3527b096574078a17ac644b5d2265a0a3</cites></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Tsyndetics_thumb_exl</thumbnail><linktohtml>$$Uhttps://dx.doi.org/10.1016/j.resp.2007.03.011$$EHTML$$P50$$Gelsevier$$H</linktohtml><link.rule.ids>314,780,784,3550,27924,27925,45995</link.rule.ids><backlink>$$Uhttps://www.ncbi.nlm.nih.gov/pubmed/17449336$$D View this record in MEDLINE/PubMed$$Hfree_for_read</backlink></links><search><creatorcontrib>Winslow, Robert M</creatorcontrib><title>The role of hemoglobin oxygen affinity in oxygen transport at high altitude</title><title>Respiratory physiology &amp; neurobiology</title><addtitle>Respir Physiol Neurobiol</addtitle><description>Abstract Hemoglobin is involved in the regulation of O2 transport in two ways: a long-term adjustment in red cell mass is mediated by erythropoietin (EPO), a response to renal oxgyenation. Short-term, rapid-response adjustments are mediated by ventilation, cardiac output, hemoglobin oxygen affinity (P50), barriers to O2 diffusion, and the control of local microvascular tissue perfusion. The distribution of O2 between dissolved ( P O 2 ) and hemoglobin-bound (saturation) is the familiar oxygen equilibrium curve, whose position is noted as P50. Human hemoglobin is not genetically adapted for function at high altitude. However, more specialized species native to high altitudes (guinea pig and bar-headed goose, for example) seem to have a lower P50 than their sea level counterparts, an adaptation that presumably promotes O2 uptake from a hypoxic environment. Humans, native to very high altitude either in the Andes or Himalayan mountains, also can increase O2 affinity, not because of a fundamental difference in hemoglobin structure or function, but because of extreme hyperventilation and alkalosis.</description><subject>Acclimatization - physiology</subject><subject>Altitude</subject><subject>Altitude Sickness - blood</subject><subject>Animals</subject><subject>Atmospheric Pressure</subject><subject>Biological Evolution</subject><subject>Erythrocytes - enzymology</subject><subject>Hemoglobin</subject><subject>Hemoglobins - metabolism</subject><subject>Humans</subject><subject>Medical Education</subject><subject>Oxygen - blood</subject><subject>Oxygen transport</subject><subject>P50</subject><subject>Pulmonary/Respiratory</subject><issn>1569-9048</issn><issn>1878-1519</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2007</creationdate><recordtype>article</recordtype><sourceid>EIF</sourceid><recordid>eNp9kU-LFDEQxYMo7rr6BTxIn7x1W_nX6YAIsriruODB9RzS6eqZjD2dMUkvzrc3zQwseNhTFcV7D-r3CHlLoaFA2w-7JmI6NAxANcAboPQZuaSd6moqqX5edtnqWoPoLsirlHYAVFHFX5ILqoTQnLeX5Pv9FqsYJqzCWG1xHzZT6P1chb_HDc6VHUc_-3ysHk852jkdQsyVzdXWb7aVnbLPy4CvyYvRTgnfnOcV-XXz5f76a3334_bb9ee72gnQuVaSo5CuaynrhBJM8MGO0jol9Dho2XPJVA-6lUqA6ixV1rVC9HJgrJUWLL8i70-5hxj-LJiy2fvkcJrsjGFJpu04aM54EbKT0MWQUsTRHKLf23g0FMyK0OzMitCsCA1wUxAW07tz-tLvcXi0nJkVwceTAMuPDx6jSc7j7HDwEV02Q_BP53_6z-6mwtjZ6TceMe3CEudCz1CTmAHzcy1x7RBU6Q-04v8A0i6WaQ</recordid><startdate>20070930</startdate><enddate>20070930</enddate><creator>Winslow, Robert M</creator><general>Elsevier B.V</general><scope>CGR</scope><scope>CUY</scope><scope>CVF</scope><scope>ECM</scope><scope>EIF</scope><scope>NPM</scope><scope>AAYXX</scope><scope>CITATION</scope><scope>7X8</scope></search><sort><creationdate>20070930</creationdate><title>The role of hemoglobin oxygen affinity in oxygen transport at high altitude</title><author>Winslow, Robert M</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-LOGICAL-c409t-753e45c86128474243daf5ac749fd95b3527b096574078a17ac644b5d2265a0a3</frbrgroupid><rsrctype>articles</rsrctype><prefilter>articles</prefilter><language>eng</language><creationdate>2007</creationdate><topic>Acclimatization - physiology</topic><topic>Altitude</topic><topic>Altitude Sickness - blood</topic><topic>Animals</topic><topic>Atmospheric Pressure</topic><topic>Biological Evolution</topic><topic>Erythrocytes - enzymology</topic><topic>Hemoglobin</topic><topic>Hemoglobins - metabolism</topic><topic>Humans</topic><topic>Medical Education</topic><topic>Oxygen - blood</topic><topic>Oxygen transport</topic><topic>P50</topic><topic>Pulmonary/Respiratory</topic><toplevel>peer_reviewed</toplevel><toplevel>online_resources</toplevel><creatorcontrib>Winslow, Robert M</creatorcontrib><collection>Medline</collection><collection>MEDLINE</collection><collection>MEDLINE (Ovid)</collection><collection>MEDLINE</collection><collection>MEDLINE</collection><collection>PubMed</collection><collection>CrossRef</collection><collection>MEDLINE - Academic</collection><jtitle>Respiratory physiology &amp; neurobiology</jtitle></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext</fulltext></delivery><addata><au>Winslow, Robert M</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>The role of hemoglobin oxygen affinity in oxygen transport at high altitude</atitle><jtitle>Respiratory physiology &amp; neurobiology</jtitle><addtitle>Respir Physiol Neurobiol</addtitle><date>2007-09-30</date><risdate>2007</risdate><volume>158</volume><issue>2</issue><spage>121</spage><epage>127</epage><pages>121-127</pages><issn>1569-9048</issn><eissn>1878-1519</eissn><abstract>Abstract Hemoglobin is involved in the regulation of O2 transport in two ways: a long-term adjustment in red cell mass is mediated by erythropoietin (EPO), a response to renal oxgyenation. Short-term, rapid-response adjustments are mediated by ventilation, cardiac output, hemoglobin oxygen affinity (P50), barriers to O2 diffusion, and the control of local microvascular tissue perfusion. The distribution of O2 between dissolved ( P O 2 ) and hemoglobin-bound (saturation) is the familiar oxygen equilibrium curve, whose position is noted as P50. Human hemoglobin is not genetically adapted for function at high altitude. However, more specialized species native to high altitudes (guinea pig and bar-headed goose, for example) seem to have a lower P50 than their sea level counterparts, an adaptation that presumably promotes O2 uptake from a hypoxic environment. Humans, native to very high altitude either in the Andes or Himalayan mountains, also can increase O2 affinity, not because of a fundamental difference in hemoglobin structure or function, but because of extreme hyperventilation and alkalosis.</abstract><cop>Netherlands</cop><pub>Elsevier B.V</pub><pmid>17449336</pmid><doi>10.1016/j.resp.2007.03.011</doi><tpages>7</tpages></addata></record>
fulltext fulltext
identifier ISSN: 1569-9048
ispartof Respiratory physiology & neurobiology, 2007-09, Vol.158 (2), p.121-127
issn 1569-9048
1878-1519
language eng
recordid cdi_proquest_miscellaneous_68309323
source MEDLINE; Access via ScienceDirect (Elsevier)
subjects Acclimatization - physiology
Altitude
Altitude Sickness - blood
Animals
Atmospheric Pressure
Biological Evolution
Erythrocytes - enzymology
Hemoglobin
Hemoglobins - metabolism
Humans
Medical Education
Oxygen - blood
Oxygen transport
P50
Pulmonary/Respiratory
title The role of hemoglobin oxygen affinity in oxygen transport at high altitude
url https://sfx.bib-bvb.de/sfx_tum?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&ctx_tim=2024-12-23T17%3A02%3A20IST&url_ver=Z39.88-2004&url_ctx_fmt=infofi/fmt:kev:mtx:ctx&rfr_id=info:sid/primo.exlibrisgroup.com:primo3-Article-proquest_cross&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.atitle=The%20role%20of%20hemoglobin%20oxygen%20affinity%20in%20oxygen%20transport%20at%20high%20altitude&rft.jtitle=Respiratory%20physiology%20&%20neurobiology&rft.au=Winslow,%20Robert%20M&rft.date=2007-09-30&rft.volume=158&rft.issue=2&rft.spage=121&rft.epage=127&rft.pages=121-127&rft.issn=1569-9048&rft.eissn=1878-1519&rft_id=info:doi/10.1016/j.resp.2007.03.011&rft_dat=%3Cproquest_cross%3E68309323%3C/proquest_cross%3E%3Curl%3E%3C/url%3E&disable_directlink=true&sfx.directlink=off&sfx.report_link=0&rft_id=info:oai/&rft_pqid=68309323&rft_id=info:pmid/17449336&rft_els_id=1_s2_0_S1569904807001097&rfr_iscdi=true