title: Regulation of cholesterol synthesis in skin fibroblasts derived from old people.
abstract: Sterol synthesis from radioactive acetate and the suppression of this synthesis by human low density lipoprotein (LDL) have been investigated in skin fibroblast strains derived from infant donors and from donors over the age of 70 years. The activity of the enzyme hydroxymethylglutaryl-CoA reductase and its repression by LDL has also been investigated in these fibroblast strains and in senescent cells of the foetal lung cell strain MRC-5. No age-related differences could be detected either in repression of [3H]acetate incorporation by LDL, or in repression of HMG-CoA reductase activity.
mesh_terms: D000368:Aged; D000375:Aging; D002478:Cells, Cultured / Q000378:metabolism*; D002784:Cholesterol / Q000096:biosynthesis*; D005260:Female; D005333:Fetus; D005347:Fibroblasts / Q000378:metabolism; D006801:Humans; D006903:Hydroxymethylglutaryl CoA Reductases / Q000378:metabolism*; D008077:Lipoproteins, LDL / Q000378:metabolism; D008297:Male; D012867:Skin / Q000378:metabolism
chemical_list: D008077:Lipoproteins, LDL; D002784:Cholesterol; D006903:Hydroxymethylglutaryl CoA Reductases