Effect of drugs, peptide hormones and lipogenic precursors on the relative incorporation of [3H]H2O and carbon into hepatic cholesterol

FEBS Letters

Gibbons, G.F.¹  Björnsson, O.G.¹  Pullinger, C.R.¹ 

[1] Metabolic Research Laboratory, Nuffield Department of Clinical Medicine, Radcliffe Infirmary, Woodstock Road, Oxford OX2 6HE, England

关键词: Insulin;    Glucagon;    Pyruvate;    Lactate;    NADPH;    Cholesterol synthesis;   

DOI  :  10.1016/0014-5793(85)81264-3

学科分类：生物化学/生物物理

来源: John Wiley & Sons Ltd.

【 摘 要 】

Measurement of the weight of desmosterol produced during its biosynthesis in the presence of tritiated water and triparanol has permitted a direct determination of the relative flux of carbon and tritium (the H/C ratio) into sterol in hepatocytes. The H/C ratio increased with time of incubation irrespective of the nutritional state of the donor animals. This increase was more marked in hepatocytes from starved animals. Pyruvate and lactate increased, and glucagon decreased, the sterol H/C ratio. Addition of pyruvate to incubations containing glucagon resulted in a 32–67% increase in the H/C ratio depending upon nutritional status. Insulin had no effect whilst (−)-hydroxycitrate decreased the ratio by 25%.

【 授权许可】

Unknown