Complete intracellular pH protection during extracellular pH depression is associated with hypercarbia tolerance in white sturgeon, Acipenser transmontanus
Identifieur interne : 000137 ( PascalFrancis/Checkpoint ); précédent : 000136; suivant : 000138Complete intracellular pH protection during extracellular pH depression is associated with hypercarbia tolerance in white sturgeon, Acipenser transmontanus
Auteurs : D. W. Baker [Canada] ; V. Matey [États-Unis] ; K. T. Huynh [Canada] ; J. M. Wilson [Portugal] ; J. D. Morgan [Canada] ; C. J. Brauner [Canada]Source :
- American journal of physiology. Regulatory, integrative and comparative physiology [ 0363-6119 ] ; 2009.
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Abstract
Sturgeons are among the most CO2 tolerant of fishes investigated to date. However, the basis of this exceptional CO2 tolerance is unknown. Here, white sturgeon, Acipenser transmontanus, were exposed to elevated CO2 to investigate the mechanisms associated with short-term hypercarbia tolerance. During exposure to 1.5 kPa PCO2, transient blood pH [extracellular pH (pHe)] depression was compensated within 24 h and associated with net plasma HCO-3 accumulation and equimolar Cl- loss, and changes in gill morphology, such as a decrease in apical surface area of mitochondrial-rich cells. These findings indicate that pHe recovery at this level of hypercarbia is accomplished in a manner similar to most freshwater teleost species studied to date, although branchial mechanisms involved may differ. White sturgeon exposed to more severe hypercarbia (3 and 6 kPa PCO2) for 48 h exhibited incomplete pH compensation in blood and red blood cells. Despite pHe depression, intracellular pH (pHi) of white muscle, heart, brain, and liver did not decrease during a transient (6 h of 1.5 kPa PCO2) or prolonged (48 h at 3 and 6 kPa PCO2) blood acidosis. This pHi protection was not due to high intrinsic buffering in tissues. Such tight active cellular regulation of pHi in the absence of pHe compensation represents a unique pattern for non-air-breathing fishes, and we hypothesize that it is the basis for the exceptional CO2 tolerance of white sturgeon and, likely, other CO2 tolerant fishes. Further research to elucidate the specific mechanisms responsible for this tremendous pH regulatory capacity in tissues of white sturgeon is warranted.
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Matey</name><affiliation wicri:level="2"><inist:fA14 i1="02"><s1>Department of Biology, San Diego State University</s1><s2>San Diego, California</s2><s3>USA</s3><sZ>2 aut.</sZ></inist:fA14><country>États-Unis</country><placeName><region type="state">Californie</region></placeName></affiliation></author><author><name sortKey="Huynh, K T" sort="Huynh, K T" uniqKey="Huynh K" first="K. T." last="Huynh">K. T. Huynh</name><affiliation wicri:level="1"><inist:fA14 i1="01"><s1>Department of Zoology, University of British Columbia</s1><s2>Vancouver, British Columbia</s2><s3>CAN</s3><sZ>1 aut.</sZ><sZ>3 aut.</sZ><sZ>6 aut.</sZ></inist:fA14><country>Canada</country><wicri:noRegion>Vancouver, British Columbia</wicri:noRegion></affiliation></author><author><name sortKey="Wilson, J M" sort="Wilson, J M" uniqKey="Wilson J" first="J. M." last="Wilson">J. M. 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Brauner</name><affiliation wicri:level="1"><inist:fA14 i1="01"><s1>Department of Zoology, University of British Columbia</s1><s2>Vancouver, British Columbia</s2><s3>CAN</s3><sZ>1 aut.</sZ><sZ>3 aut.</sZ><sZ>6 aut.</sZ></inist:fA14><country>Canada</country><wicri:noRegion>Vancouver, British Columbia</wicri:noRegion></affiliation></author></titleStmt><publicationStmt><idno type="wicri:source">INIST</idno><idno type="inist">09-0252976</idno><date when="2009">2009</date><idno type="stanalyst">PASCAL 09-0252976 INIST</idno><idno type="RBID">Pascal:09-0252976</idno><idno type="wicri:Area/PascalFrancis/Corpus">000133</idno><idno type="wicri:Area/PascalFrancis/Curation">000243</idno><idno type="wicri:Area/PascalFrancis/Checkpoint">000137</idno><idno type="wicri:explorRef" wicri:stream="PascalFrancis" wicri:step="Checkpoint">000137</idno></publicationStmt><sourceDesc><biblStruct><analytic><title xml:lang="en" level="a">Complete intracellular pH protection during extracellular pH depression is associated with hypercarbia tolerance in white sturgeon, Acipenser transmontanus</title><author><name sortKey="Baker, D W" sort="Baker, D W" uniqKey="Baker D" first="D. W." last="Baker">D. W. Baker</name><affiliation wicri:level="1"><inist:fA14 i1="01"><s1>Department of Zoology, University of British Columbia</s1><s2>Vancouver, British Columbia</s2><s3>CAN</s3><sZ>1 aut.</sZ><sZ>3 aut.</sZ><sZ>6 aut.</sZ></inist:fA14><country>Canada</country><wicri:noRegion>Vancouver, British Columbia</wicri:noRegion></affiliation></author><author><name sortKey="Matey, V" sort="Matey, V" uniqKey="Matey V" first="V." last="Matey">V. Matey</name><affiliation wicri:level="2"><inist:fA14 i1="02"><s1>Department of Biology, San Diego State University</s1><s2>San Diego, California</s2><s3>USA</s3><sZ>2 aut.</sZ></inist:fA14><country>États-Unis</country><placeName><region type="state">Californie</region></placeName></affiliation></author><author><name sortKey="Huynh, K T" sort="Huynh, K T" uniqKey="Huynh K" first="K. T." last="Huynh">K. T. Huynh</name><affiliation wicri:level="1"><inist:fA14 i1="01"><s1>Department of Zoology, University of British Columbia</s1><s2>Vancouver, British Columbia</s2><s3>CAN</s3><sZ>1 aut.</sZ><sZ>3 aut.</sZ><sZ>6 aut.</sZ></inist:fA14><country>Canada</country><wicri:noRegion>Vancouver, British Columbia</wicri:noRegion></affiliation></author><author><name sortKey="Wilson, J M" sort="Wilson, J M" uniqKey="Wilson J" first="J. M." last="Wilson">J. M. Wilson</name><affiliation wicri:level="1"><inist:fA14 i1="03"><s1>Center for Marine and Environmental Research (CIIMAR)</s1><s2>Porto</s2><s3>PRT</s3><sZ>4 aut.</sZ></inist:fA14><country>Portugal</country><wicri:noRegion>Center for Marine and Environmental Research (CIIMAR)</wicri:noRegion></affiliation></author><author><name sortKey="Morgan, J D" sort="Morgan, J D" uniqKey="Morgan J" first="J. D." last="Morgan">J. D. Morgan</name><affiliation wicri:level="1"><inist:fA14 i1="04"><s1>Faculty of Science and Technology, Vancouver Island University</s1><s2>Nanaimo, British Columbia</s2><s3>CAN</s3><sZ>5 aut.</sZ></inist:fA14><country>Canada</country><wicri:noRegion>Nanaimo, British Columbia</wicri:noRegion></affiliation></author><author><name sortKey="Brauner, C J" sort="Brauner, C J" uniqKey="Brauner C" first="C. J." last="Brauner">C. J. Brauner</name><affiliation wicri:level="1"><inist:fA14 i1="01"><s1>Department of Zoology, University of British Columbia</s1><s2>Vancouver, British Columbia</s2><s3>CAN</s3><sZ>1 aut.</sZ><sZ>3 aut.</sZ><sZ>6 aut.</sZ></inist:fA14><country>Canada</country><wicri:noRegion>Vancouver, British Columbia</wicri:noRegion></affiliation></author></analytic><series><title level="j" type="main">American journal of physiology. Regulatory, integrative and comparative physiology</title><title level="j" type="abbreviated">Am. j. physiol., Regul. integr. comp. physiol.</title><idno type="ISSN">0363-6119</idno><imprint><date when="2009">2009</date></imprint></series></biblStruct></sourceDesc><seriesStmt><title level="j" type="main">American journal of physiology. Regulatory, integrative and comparative physiology</title><title level="j" type="abbreviated">Am. j. physiol., Regul. integr. comp. physiol.</title><idno type="ISSN">0363-6119</idno></seriesStmt></fileDesc><profileDesc><textClass><keywords scheme="KwdEn" xml:lang="en"><term>Blood</term><term>Carbon dioxide</term><term>Chlorides</term><term>Extracellular</term><term>Gill</term><term>Hydrogencarbonates</term><term>Intracellular</term><term>Pisces</term><term>Plasma</term><term>Protection</term><term>Short term</term><term>Tolerance</term><term>pH</term></keywords><keywords scheme="Pascal" xml:lang="fr"><term>Intracellulaire</term><term>pH</term><term>Protection</term><term>Extracellulaire</term><term>Tolérance</term><term>Pisces</term><term>Court terme</term><term>Sang</term><term>Plasma</term><term>Hydrogénocarbonate</term><term>Chlorure</term><term>Branchie</term><term>Dioxyde de carbone</term></keywords></textClass></profileDesc></teiHeader><front><div type="abstract" xml:lang="en">Sturgeons are among the most CO<sub>2</sub> tolerant of fishes investigated to date. However, the basis of this exceptional CO<sub>2</sub> tolerance is unknown. Here, white sturgeon, Acipenser transmontanus, were exposed to elevated CO<sub>2</sub> to investigate the mechanisms associated with short-term hypercarbia tolerance. During exposure to 1.5 kPa PCO<sub>2</sub>, transient blood pH [extracellular pH (pHe)] depression was compensated within 24 h and associated with net plasma HCO<sup>-</sup><sub>3</sub> accumulation and equimolar Cl<sup>-</sup> loss, and changes in gill morphology, such as a decrease in apical surface area of mitochondrial-rich cells. These findings indicate that pHe recovery at this level of hypercarbia is accomplished in a manner similar to most freshwater teleost species studied to date, although branchial mechanisms involved may differ. White sturgeon exposed to more severe hypercarbia (3 and 6 kPa PCO<sub>2</sub>) for 48 h exhibited incomplete pH compensation in blood and red blood cells. Despite pHe depression, intracellular pH (pHi) of white muscle, heart, brain, and liver did not decrease during a transient (6 h of 1.5 kPa PCO<sub>2</sub>) or prolonged (48 h at 3 and 6 kPa PCO<sub>2</sub>) blood acidosis. This pHi protection was not due to high intrinsic buffering in tissues. Such tight active cellular regulation of pHi in the absence of pHe compensation represents a unique pattern for non-air-breathing fishes, and we hypothesize that it is the basis for the exceptional CO<sub>2</sub> tolerance of white sturgeon and, likely, other CO<sub>2</sub> tolerant fishes. Further research to elucidate the specific mechanisms responsible for this tremendous pH regulatory capacity in tissues of white sturgeon is warranted.</div></front></TEI><inist><standard h6="B"><pA><fA01 i1="01" i2="1"><s0>0363-6119</s0></fA01><fA02 i1="01"><s0>AJPRDO</s0></fA02><fA03 i2="1"><s0>Am. j. physiol., Regul. integr. comp. physiol.</s0></fA03><fA05><s2>65</s2></fA05><fA06><s2>6</s2></fA06><fA08 i1="01" i2="1" l="ENG"><s1>Complete intracellular pH protection during extracellular pH depression is associated with hypercarbia tolerance in white sturgeon, Acipenser transmontanus</s1></fA08><fA11 i1="01" i2="1"><s1>BAKER (D. W.)</s1></fA11><fA11 i1="02" i2="1"><s1>MATEY (V.)</s1></fA11><fA11 i1="03" i2="1"><s1>HUYNH (K. T.)</s1></fA11><fA11 i1="04" i2="1"><s1>WILSON (J. M.)</s1></fA11><fA11 i1="05" i2="1"><s1>MORGAN (J. D.)</s1></fA11><fA11 i1="06" i2="1"><s1>BRAUNER (C. J.)</s1></fA11><fA14 i1="01"><s1>Department of Zoology, University of British Columbia</s1><s2>Vancouver, British Columbia</s2><s3>CAN</s3><sZ>1 aut.</sZ><sZ>3 aut.</sZ><sZ>6 aut.</sZ></fA14><fA14 i1="02"><s1>Department of Biology, San Diego State University</s1><s2>San Diego, California</s2><s3>USA</s3><sZ>2 aut.</sZ></fA14><fA14 i1="03"><s1>Center for Marine and Environmental Research (CIIMAR)</s1><s2>Porto</s2><s3>PRT</s3><sZ>4 aut.</sZ></fA14><fA14 i1="04"><s1>Faculty of Science and Technology, Vancouver Island University</s1><s2>Nanaimo, British Columbia</s2><s3>CAN</s3><sZ>5 aut.</sZ></fA14><fA20><s2>R1868-R1880</s2></fA20><fA21><s1>2009</s1></fA21><fA23 i1="01"><s0>ENG</s0></fA23><fA43 i1="01"><s1>INIST</s1><s2>670E</s2><s5>354000188501730220</s5></fA43><fA44><s0>0000</s0><s1>© 2009 INIST-CNRS. All rights reserved.</s1></fA44><fA45><s0>59 ref.</s0></fA45><fA47 i1="01" i2="1"><s0>09-0252976</s0></fA47><fA60><s1>P</s1></fA60><fA61><s0>A</s0></fA61><fA64 i1="01" i2="1"><s0>American journal of physiology. Regulatory, integrative and comparative physiology</s0></fA64><fA66 i1="01"><s0>USA</s0></fA66><fC01 i1="01" l="ENG"><s0>Sturgeons are among the most CO<sub>2</sub> tolerant of fishes investigated to date. However, the basis of this exceptional CO<sub>2</sub> tolerance is unknown. Here, white sturgeon, Acipenser transmontanus, were exposed to elevated CO<sub>2</sub> to investigate the mechanisms associated with short-term hypercarbia tolerance. During exposure to 1.5 kPa PCO<sub>2</sub>, transient blood pH [extracellular pH (pHe)] depression was compensated within 24 h and associated with net plasma HCO<sup>-</sup><sub>3</sub> accumulation and equimolar Cl<sup>-</sup> loss, and changes in gill morphology, such as a decrease in apical surface area of mitochondrial-rich cells. These findings indicate that pHe recovery at this level of hypercarbia is accomplished in a manner similar to most freshwater teleost species studied to date, although branchial mechanisms involved may differ. White sturgeon exposed to more severe hypercarbia (3 and 6 kPa PCO<sub>2</sub>) for 48 h exhibited incomplete pH compensation in blood and red blood cells. Despite pHe depression, intracellular pH (pHi) of white muscle, heart, brain, and liver did not decrease during a transient (6 h of 1.5 kPa PCO<sub>2</sub>) or prolonged (48 h at 3 and 6 kPa PCO<sub>2</sub>) blood acidosis. This pHi protection was not due to high intrinsic buffering in tissues. Such tight active cellular regulation of pHi in the absence of pHe compensation represents a unique pattern for non-air-breathing fishes, and we hypothesize that it is the basis for the exceptional CO<sub>2</sub> tolerance of white sturgeon and, likely, other CO<sub>2</sub> tolerant fishes. Further research to elucidate the specific mechanisms responsible for this tremendous pH regulatory capacity in tissues of white sturgeon is warranted.</s0></fC01><fC02 i1="01" i2="X"><s0>002A12F03B</s0></fC02><fC02 i1="02" i2="X"><s0>002A25D02</s0></fC02><fC03 i1="01" i2="X" l="FRE"><s0>Intracellulaire</s0><s5>01</s5></fC03><fC03 i1="01" i2="X" l="ENG"><s0>Intracellular</s0><s5>01</s5></fC03><fC03 i1="01" i2="X" l="SPA"><s0>Intracelular</s0><s5>01</s5></fC03><fC03 i1="02" i2="X" l="FRE"><s0>pH</s0><s5>02</s5></fC03><fC03 i1="02" i2="X" l="ENG"><s0>pH</s0><s5>02</s5></fC03><fC03 i1="02" i2="X" l="SPA"><s0>pH</s0><s5>02</s5></fC03><fC03 i1="03" i2="X" l="FRE"><s0>Protection</s0><s5>03</s5></fC03><fC03 i1="03" i2="X" l="ENG"><s0>Protection</s0><s5>03</s5></fC03><fC03 i1="03" i2="X" l="SPA"><s0>Protección</s0><s5>03</s5></fC03><fC03 i1="04" i2="X" l="FRE"><s0>Extracellulaire</s0><s5>04</s5></fC03><fC03 i1="04" i2="X" l="ENG"><s0>Extracellular</s0><s5>04</s5></fC03><fC03 i1="04" i2="X" l="SPA"><s0>Extracelular</s0><s5>04</s5></fC03><fC03 i1="05" i2="X" l="FRE"><s0>Tolérance</s0><s5>05</s5></fC03><fC03 i1="05" i2="X" l="ENG"><s0>Tolerance</s0><s5>05</s5></fC03><fC03 i1="05" i2="X" l="SPA"><s0>Tolerancia</s0><s5>05</s5></fC03><fC03 i1="06" i2="X" l="FRE"><s0>Pisces</s0><s2>NS</s2><s5>06</s5></fC03><fC03 i1="06" i2="X" l="ENG"><s0>Pisces</s0><s2>NS</s2><s5>06</s5></fC03><fC03 i1="06" i2="X" l="SPA"><s0>Pisces</s0><s2>NS</s2><s5>06</s5></fC03><fC03 i1="07" i2="X" l="FRE"><s0>Court terme</s0><s5>07</s5></fC03><fC03 i1="07" i2="X" l="ENG"><s0>Short term</s0><s5>07</s5></fC03><fC03 i1="07" i2="X" l="SPA"><s0>Corto plazo</s0><s5>07</s5></fC03><fC03 i1="08" i2="X" l="FRE"><s0>Sang</s0><s5>08</s5></fC03><fC03 i1="08" i2="X" l="ENG"><s0>Blood</s0><s5>08</s5></fC03><fC03 i1="08" i2="X" l="SPA"><s0>Sangre</s0><s5>08</s5></fC03><fC03 i1="09" i2="X" l="FRE"><s0>Plasma</s0><s5>10</s5></fC03><fC03 i1="09" i2="X" l="ENG"><s0>Plasma</s0><s5>10</s5></fC03><fC03 i1="09" i2="X" l="SPA"><s0>Plasma</s0><s5>10</s5></fC03><fC03 i1="10" i2="X" l="FRE"><s0>Hydrogénocarbonate</s0><s2>NA</s2><s5>11</s5></fC03><fC03 i1="10" i2="X" l="ENG"><s0>Hydrogencarbonates</s0><s2>NA</s2><s5>11</s5></fC03><fC03 i1="10" i2="X" l="SPA"><s0>Hidrógenocarbonato</s0><s2>NA</s2><s5>11</s5></fC03><fC03 i1="11" i2="X" l="FRE"><s0>Chlorure</s0><s2>NA</s2><s5>13</s5></fC03><fC03 i1="11" i2="X" l="ENG"><s0>Chlorides</s0><s2>NA</s2><s5>13</s5></fC03><fC03 i1="11" i2="X" l="SPA"><s0>Cloruro</s0><s2>NA</s2><s5>13</s5></fC03><fC03 i1="12" i2="X" l="FRE"><s0>Branchie</s0><s5>14</s5></fC03><fC03 i1="12" i2="X" l="ENG"><s0>Gill</s0><s5>14</s5></fC03><fC03 i1="12" i2="X" l="SPA"><s0>Branquia</s0><s5>14</s5></fC03><fC03 i1="13" i2="X" l="FRE"><s0>Dioxyde de carbone</s0><s2>NK</s2><s2>FX</s2><s5>69</s5></fC03><fC03 i1="13" i2="X" l="ENG"><s0>Carbon dioxide</s0><s2>NK</s2><s2>FX</s2><s5>69</s5></fC03><fC03 i1="13" i2="X" l="SPA"><s0>Carbono dióxido</s0><s2>NK</s2><s2>FX</s2><s5>69</s5></fC03><fC07 i1="01" i2="X" l="FRE"><s0>Vertebrata</s0><s2>NS</s2></fC07><fC07 i1="01" i2="X" l="ENG"><s0>Vertebrata</s0><s2>NS</s2></fC07><fC07 i1="01" i2="X" l="SPA"><s0>Vertebrata</s0><s2>NS</s2></fC07><fC07 i1="02" i2="X" l="FRE"><s0>Appareil circulatoire</s0><s5>20</s5></fC07><fC07 i1="02" i2="X" l="ENG"><s0>Circulatory system</s0><s5>20</s5></fC07><fC07 i1="02" i2="X" l="SPA"><s0>Aparato circulatorio</s0><s5>20</s5></fC07><fC07 i1="03" i2="X" l="FRE"><s0>Système nerveux central</s0><s5>21</s5></fC07><fC07 i1="03" i2="X" l="ENG"><s0>Central nervous system</s0><s5>21</s5></fC07><fC07 i1="03" i2="X" l="SPA"><s0>Sistema nervioso central</s0><s5>21</s5></fC07><fC07 i1="04" i2="X" l="FRE"><s0>Appareil digestif</s0><s5>22</s5></fC07><fC07 i1="04" i2="X" l="ENG"><s0>Digestive system</s0><s5>22</s5></fC07><fC07 i1="04" i2="X" l="SPA"><s0>Aparato digestivo</s0><s5>22</s5></fC07><fC07 i1="05" i2="X" l="FRE"><s0>Trouble de l'équilibre acidobasique</s0><s5>23</s5></fC07><fC07 i1="05" i2="X" l="ENG"><s0>Acid base balance disorder</s0><s5>23</s5></fC07><fC07 i1="05" i2="X" l="SPA"><s0>Trastorno equilibrio acidobásico</s0><s5>23</s5></fC07><fC07 i1="06" i2="X" l="FRE"><s0>Trouble métabolique</s0><s5>24</s5></fC07><fC07 i1="06" i2="X" l="ENG"><s0>Metabolic disorder</s0><s5>24</s5></fC07><fC07 i1="06" i2="X" l="SPA"><s0>Trastorno metabolismo</s0><s5>24</s5></fC07><fC07 i1="07" i2="X" l="FRE"><s0>Pathologie de l'appareil respiratoire</s0><s5>25</s5></fC07><fC07 i1="07" i2="X" l="ENG"><s0>Respiratory disease</s0><s5>25</s5></fC07><fC07 i1="07" i2="X" l="SPA"><s0>Aparato respiratorio patología</s0><s5>25</s5></fC07><fN21><s1>187</s1></fN21><fN44 i1="01"><s1>OTO</s1></fN44><fN82><s1>OTO</s1></fN82></pA></standard></inist><affiliations><list><country><li>Canada</li><li>Portugal</li><li>États-Unis</li></country><region><li>Californie</li></region></list><tree><country name="Canada"><noRegion><name sortKey="Baker, D W" sort="Baker, D W" uniqKey="Baker D" first="D. W." last="Baker">D. W. Baker</name></noRegion><name sortKey="Brauner, C J" sort="Brauner, C J" uniqKey="Brauner C" first="C. J." last="Brauner">C. J. Brauner</name><name sortKey="Huynh, K T" sort="Huynh, K T" uniqKey="Huynh K" first="K. T." last="Huynh">K. T. Huynh</name><name sortKey="Morgan, J D" sort="Morgan, J D" uniqKey="Morgan J" first="J. D." last="Morgan">J. D. Morgan</name></country><country name="États-Unis"><region name="Californie"><name sortKey="Matey, V" sort="Matey, V" uniqKey="Matey V" first="V." last="Matey">V. Matey</name></region></country><country name="Portugal"><noRegion><name sortKey="Wilson, J M" sort="Wilson, J M" uniqKey="Wilson J" first="J. M." last="Wilson">J. M. Wilson</name></noRegion></country></tree></affiliations></record>Pour manipuler ce document sous Unix (Dilib)
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|texte= Complete intracellular pH protection during extracellular pH depression is associated with hypercarbia tolerance in white sturgeon, Acipenser transmontanus
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