Loss of glucagon control of gluconeogenesis in liver cells from rats with bile duct obstruction.
Bile acids induce membrane alterations including reduced response to peptide hormones in vitro. Isolated liver cells from rats with bile duct obstruction were studied regarding gluconeogenesis and its hormonal control. While cells from shamoperated animals showed an 63% increase of glucose release in the presence of glucagon (1 microM), cells from cholestatic livers did not response regardless of the duration of obstruction. Cholestatic cells also showed other signs of membrane alterations, such as an increased enzyme leakage while redoxstatus and other metabolic responses were unchanged. These results suggest that a loss of hormonal control in the liver could contribute to disturbations of glucose homeostasis in cholestatic conditions.
D000818:Animals; D002779:Cholestasis / Q000378:metabolism*; D001651:Cholestasis, Extrahepatic / Q000378:metabolism; D003135:Common Bile Duct / Q000601:surgery; D005260:Female; D005934:Glucagon / Q000502:physiology*; D005943:Gluconeogenesis; D066298:In Vitro Techniques; D008026:Ligation; D008099:Liver / Q000378:metabolism*; D051381:Rats; D011919:Rats, Inbred Strains
D005934:Glucagon