The effects of starvation on plasma free amino acid and glucose concentrations in lake sturgeon
Identifieur interne : 000864 ( Istex/Corpus ); précédent : 000863; suivant : 000865The effects of starvation on plasma free amino acid and glucose concentrations in lake sturgeon
Auteurs : T. E. Gillis ; J. S. BallantyneSource :
- Journal of Fish Biology [ 0022-1112 ] ; 1996-12.
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Abstract
The effect of starvation on the metabolism of the lake sturgeon Acipenser fulvescens was examined by measuring haematocrit, plasma glucose concentrations, and plasma free amino acids. Plasma was sampled on day 0, 10, 20, 45 and 60 of a 60‐day starvation period. Haematocrit was observed to decrease with starvation indicating a decreased oxygen carrying capacity of the blood. Plasma glucose levels differed only at day 10, with a decrease in blood glucose level in the starved group. No differences were detected between groups for alanine, aspartate, and serine, while elevated levels were observed for glutamine throughout the experiment. An increase in arginine, tyrosine, valine, methionine, tryptophan, phenylalanine, glutamate, glycine, isoleucine, histidine and leucine, concentrations were observed after 45 days of starvation. The maintenance, or increased plasma levels, of glucogenic amino acids in combination with the maintenance of blood glucose concentrations indicates active gluconeogenic processes in the liver supported by muscle proteolysis.
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DOI: 10.1111/j.1095-8649.1996.tb01797.x
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Haematocrit was observed to decrease with starvation indicating a decreased oxygen carrying capacity of the blood. Plasma glucose levels differed only at day 10, with a decrease in blood glucose level in the starved group. No differences were detected between groups for alanine, aspartate, and serine, while elevated levels were observed for glutamine throughout the experiment. An increase in arginine, tyrosine, valine, methionine, tryptophan, phenylalanine, glutamate, glycine, isoleucine, histidine and leucine, concentrations were observed after 45 days of starvation. The maintenance, or increased plasma levels, of glucogenic amino acids in combination with the maintenance of blood glucose concentrations indicates active gluconeogenic processes in the liver supported by muscle proteolysis.</p></abstract></abstractGroup></contentMeta></header></component></istex:document></istex:metadataXml><mods version="3.6"><titleInfo lang="en"><title>The effects of starvation on plasma free amino acid and glucose concentrations in lake sturgeon</title></titleInfo><titleInfo type="alternative" contentType="CDATA" lang="en"><title>The effects of starvation on plasma free amino acid and glucose concentrations in lake sturgeon</title></titleInfo><name type="personal"><namePart type="given">T. E.</namePart><namePart type="family">Gillis</namePart><affiliation>Department of Zoology, University of Guelph, Ontario, N1G 2W1, Canada</affiliation><role><roleTerm type="text">author</roleTerm></role></name><name type="personal"><namePart type="given">J. S.</namePart><namePart type="family">Ballantyne</namePart><affiliation>Department of Zoology, University of Guelph, Ontario, N1G 2W1, Canada</affiliation><affiliation>E-mail: jballant@uoguelph.ca</affiliation><role><roleTerm type="text">author</roleTerm></role></name><typeOfResource>text</typeOfResource><genre type="article" displayLabel="article"></genre><originInfo><publisher>Blackwell Publishing Ltd</publisher><place><placeTerm type="text">Oxford, UK</placeTerm></place><dateIssued encoding="w3cdtf">1996-12</dateIssued><edition>(Received 19 March 1996, Accepted 29 July 1996)</edition><copyrightDate encoding="w3cdtf">1996</copyrightDate></originInfo><language><languageTerm type="code" authority="rfc3066">en</languageTerm><languageTerm type="code" authority="iso639-2b">eng</languageTerm></language><physicalDescription><internetMediaType>text/html</internetMediaType><extent unit="references">41</extent></physicalDescription><abstract lang="en">The effect of starvation on the metabolism of the lake sturgeon Acipenser fulvescens was examined by measuring haematocrit, plasma glucose concentrations, and plasma free amino acids. Plasma was sampled on day 0, 10, 20, 45 and 60 of a 60‐day starvation period. Haematocrit was observed to decrease with starvation indicating a decreased oxygen carrying capacity of the blood. Plasma glucose levels differed only at day 10, with a decrease in blood glucose level in the starved group. No differences were detected between groups for alanine, aspartate, and serine, while elevated levels were observed for glutamine throughout the experiment. An increase in arginine, tyrosine, valine, methionine, tryptophan, phenylalanine, glutamate, glycine, isoleucine, histidine and leucine, concentrations were observed after 45 days of starvation. The maintenance, or increased plasma levels, of glucogenic amino acids in combination with the maintenance of blood glucose concentrations indicates active gluconeogenic processes in the liver supported by muscle proteolysis.</abstract><subject lang="en"><genre>keywords</genre><topic>amino acids</topic><topic>starvation</topic><topic>fasting</topic><topic>glucose</topic><topic>lake sturgeon</topic><topic>Acipenser fulvescens</topic><topic>plasma</topic></subject><relatedItem type="host"><titleInfo><title>Journal of Fish Biology</title></titleInfo><genre type="journal">journal</genre><identifier type="ISSN">0022-1112</identifier><identifier type="eISSN">1095-8649</identifier><identifier type="DOI">10.1111/(ISSN)1095-8649</identifier><identifier type="PublisherID">JFB</identifier><part><date>1996</date><detail type="volume"><caption>vol.</caption><number>49</number></detail><detail type="issue"><caption>no.</caption><number>6</number></detail><extent unit="pages"><start>1306</start><end>1316</end><total>11</total></extent></part></relatedItem><identifier type="istex">B75FD0CA53CE3448DECD1359BCCF8D873EBBF872</identifier><identifier type="DOI">10.1111/j.1095-8649.1996.tb01797.x</identifier><identifier type="ArticleID">JFB1306</identifier><recordInfo><recordContentSource>WILEY</recordContentSource><recordOrigin>Blackwell Publishing Ltd</recordOrigin></recordInfo></mods></metadata><serie></serie></istex></record>Pour manipuler ce document sous Unix (Dilib)
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