cholecalciferol has been researched along with Starvation* in 3 studies
3 other study(ies) available for cholecalciferol and Starvation
| Article | Year |
|---|---|
Sex differences in the hydroxylation of cholecalciferol and of 5 beta-cholestane-3 alpha, 7 alpha, 12 alpha-triol in rat liver.
The effect of sex hormones on hydroxylation of cholecalciferol ('vitamin D3') and of 5 beta-cholestane-3 alpha, 7 alpha, 12 alpha-triol has been investigated in female- and male-rat livers. The mitochondrial cholecalciferol 25-hydroxylase and C27-steroid 27-hydroxylase activities were respectively 4.6- and 2.7-fold higher in female- than in male-rat livers. The microsomal 1 alpha-hydroxycholecalciferol 25-hydroxylase was 2.8-fold higher in male- than in female-rat liver. No significant difference was found in the microsomal 25-hydroxylation of 5 beta-cholestane-3 alpha, 7 alpha, 12 alpha-triol. Liver microsomes (microsomal fractions) from male, but not from female, rats also catalysed 1-hydroxylation of 5 beta-cholestane-3 alpha, 7 alpha, 12 alpha-triol. Injection of testosterone into female rats decreased the mitochondrial cholecalciferol 25-hydroxylase and C27-steroid 27-hydroxylase activities, but not to a statistically significant extent. Testosterone treatment had no effect on the microsomal hydroxylases in female-rat liver. Injection of oestradiol valerate to male rats resulted in increased activities of both mitochondrial hydroxylases to the same levels as those of control females, while the microsomal enzyme activities decreased. The present results indicate that sex hormones exert a regulatory control on the mitochondrial cholecalciferol 25-hydroxylase and C27-steroid 27-hydroxylase activities. Topics: Animals; Cholecalciferol; Cholestanols; Estradiol; Female; Hydroxylation; Liver; Male; Microsomes, Liver; Mitochondria, Liver; Rats; Rats, Inbred Strains; Sex Characteristics; Starvation; Testosterone | 1987 |
The effect of DDT on vitamin D metabolism and calcium binding activity in the chick.
The mechanism of DDT impaired calcium absorption was studied in control, DDT fed and starved chicks. The metabolism of [3H]cholecalciferol was the same in the 3 groups, but the DDT fed and starved chicks had less intestinal calcium binding activity than the control chicks. These results suggest that DDT impaired calcium absorption and intestinal calcium binding activity may be a result of DDT induced anorexia. Topics: Animals; Calcium; Chickens; Cholecalciferol; DDT; Diet; Intestinal Mucosa; Starvation; Vitamin D | 1979 |
Structural lipoproteins of the mucosal cell.
Topics: Animals; Bile Acids and Salts; Chemical Phenomena; Chemistry; Cholecalciferol; Detergents; Guinea Pigs; In Vitro Techniques; Intestinal Mucosa; Lipoproteins; Liver; Microsomes; Mitochondria; Mucous Membrane; Nitrogen; Phospholipids; Sodium Chloride; Starvation; Surface-Active Agents; Ultrasonics | 1964 |