Effect of vitamin E on transport processes in isolated rat hepatocytes.
Vitamin E deficiency is a common consequence of chronic cholestatic liver disorders. Inasmuch as vitamin E content of cellular membranes alters membrane properties such as fluidity and molecular order, we postulated that vitamin E status could affect hepatocyte transport processes dependent on membrane integrity. Hepatocytes were isolated from rats maintained on diets containing deficient, sufficient, or excess vitamin E. Cell viability and oxygen consumption were maintained in all groups of hepatocytes. Hepatocyte uptake of taurocholic acid and ouabain and Na+,K(+)-ATPase activity estimated by rubidium-86 influx did not differ with vitamin E status. Vitamin-E-deficient hepatocytes had increased generation of lipid peroxide products. We conclude that deficient or excess vitamin E status had little effect on selected transport processes in normal hepatocytes.
Sokol
R J
RJ
Department of Pediatrics, University of Colorado School of Medicine, Denver, 80262.
Devereaux
M W
MW
Khandwala
R A
RA
Narkewicz
M R
MR
Sondheimer
N J
NJ
D000818:Animals; D001693:Biological Transport, Active / Q000187:drug effects; D002470:Cell Survival / Q000187:drug effects; D015227:Lipid Peroxidation / Q000187:drug effects*; D008099:Liver / Q000166:cytology* / Q000187:drug effects / Q000378:metabolism; D008297:Male; D010101:Oxygen Consumption / Q000187:drug effects; D051381:Rats; D011919:Rats, Inbred Strains; D013656:Taurocholic Acid / Q000378:metabolism; D014810:Vitamin E / Q000494:pharmacology*; D014811:Vitamin E Deficiency / Q000378:metabolism; D014886:Weaning
D014810:Vitamin E; D013656:Taurocholic Acid