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Titolo:
HORMONAL-CONTROL OF HEPATIC GLYCOGEN-METABOLISM IN FOOD-DEPRIVED, CONTINUOUSLY SWIMMING COHO SALMON (ONCORHYNCHUS-KISUTCH)
Autore:
VIJAYAN MM; MAULE AG; SCHRECK CB; MOON TW;
Indirizzi:
EVS ENVIRONM CONSULTANTS,195 PEMBERTON AVE N VANCOUVER V7P 2R4 BC CANADA UNIV OTTAWA,DEPT BIOL OTTAWA K1N 6N5 ON CANADA OREGON STATE UNIV,DEPT FISHERIES & WILDLIFE,OREGON COOPERAT FISHERY RES UNIT CORVALLIS OR 97331
Titolo Testata:
Canadian journal of fisheries and aquatic sciences
fascicolo: 8, volume: 50, anno: 1993,
pagine: 1676 - 1682
SICI:
0706-652X(1993)50:8<1676:HOHGIF>2.0.ZU;2-B
Fonte:
ISI
Lingua:
ENG
Soggetto:
AMINO-ACID UTILIZATION; RAINBOW-TROUT; SALVELINUS-FONTINALIS; BROOK CHARR; GLUCOCORTICOID RECEPTORS; ISOLATED HEPATOCYTES; SPAWNING MIGRATION; NUTRITIONAL STATE; CORTISOL; GLUCONEOGENESIS;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Science Citation Index Expanded
Science Citation Index Expanded
Citazioni:
44
Recensione:
Indirizzi per estratti:
Citazione:
M.M. Vijayan et al., "HORMONAL-CONTROL OF HEPATIC GLYCOGEN-METABOLISM IN FOOD-DEPRIVED, CONTINUOUSLY SWIMMING COHO SALMON (ONCORHYNCHUS-KISUTCH)", Canadian journal of fisheries and aquatic sciences, 50(8), 1993, pp. 1676-1682

Abstract

The plasma cortisol concentration and liver cytosolic glucocorticoid receptor activities of continuously swimming, food-deprived coho salmon (Oncorhynchus kisutch) did not differ from those of resting, fed fish. Plasma glucose concentration was significantly higher in the exercising, starved fish, but there were no significant differences in either hepatic glycogen concentration or hepatic activities of glycogen phosphorylase, glycogen synthase, pyruvate kinase, or lactate dehydrogenase between the two groups. Total glucose production by hepatocytes didnot differ significantly between the two groups; glycogen breakdown accounted for all the glucose produced in the resting, fed fish whereasit explained only 59% of the glucose production in the exercised animals. Epinephrine and glucagon stimulation of glucose production by hepatocytes was decreased in the exercised fish without significantly affecting hepatocyte glycogen breakdown in either group. Insulin prevented glycogen breakdown and enhanced glycogen deposition in exercised fish. The results indicate that food-deprived, continuously swimming cohosalmon conserve glycogen by decreasing the responsiveness of hepatocytes to catabolic hormones and by increasing the responsiveness to insulin (anabolic hormone).

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 30/09/20 alle ore 02:19:45