Search PubMed⌕ Search

SEARCH · Search PubMed

Results for “SHIVERING”

Search indexed PubMed citations on genomics, clinical trials, systematic reviews and public health. Explore titles, authors and supplied subject terms, then open the PubMed record.

Quote a phrase for an exact phrase match. Source license links do not imply unrestricted reuse.

At least 559 records · Page 31Linked to original sources
PubMed1982

Effects of endogenous glucagon on glucose kinetics in shivering dogs.

Intravenous infusion of D-[3-3H]glucose at a constant rate was used to measure glucose production (rate of appearance, Ra) and utilization (rate of disappearance, Rd) in normal overnight-fasted dogs exposed to either neutral (TaN = +25 degrees C) or cold (TaC = -21 degrees C) ambient temperature. At TaC the metabolic rate was 4.1 times greater than at TaN and the dogs remained normothermic under both conditions. During control periods, cold exposure provoked a 2.2 times increase in hepatic Ra while plasma glucagon remained unaffected. Between two control periods somatostatin (1 microgram.kg-1.min-1 iv) and insulin (0.5 mU.kg-1.min-1 intraportal) were infused in such a manner that plasma insulin remained fairly constant at basal levels while glucagon dropped by 51% (TaN) and 66% (TaC), these percentages being not significantly different. This selective glucagon deficiency resulted in a 24% (TaN) and 30% (TaC) reduction in plasma glucose concentration, due to a 23% (TaN) and 25% (TaC) reduction in glucose production. There was a significant (r = 0.82, P less than 0.01) correlation between the control Ra and the reduction induced by the glucagon deficiency. At TaN and TaC, two significant parallel relationships were found between hepatic Ra and plasma glucagon concentration suggesting that glucagon has a modulatory effect on more fundamental mechanisms triggered by the cold-increased metabolic needs.

Animals↗