Insulin activates phospholipase C in fat cells: similarity with the activation of pyruvate dehydrogenase.

Abstract:

:Phospholipase C (PHL-C) activity determined in homogenates of fat cells treated with physiological concentrations of insulin showed a 2-3-fold increase as compared to controls in the absence of insulin. The changes of PHL-C and pyruvate dehydrogenase (PDH) activity which was measured concomitantly exhibited very similar characteristics as to insulin sensitivity, saturability, time dependence and glucose requirement. Exogenous PHL-C as an activator of PDH in fat cells (Honeyman et al., 1983) also showed a striking similarity to insulin. Our findings strongly suggest that, in fat cells, PHL-C is susceptible to short-term activation by insulin. This effect may be relevant to the mechanism of PDH activation and perhaps to other metabolic actions of insulin.

journal_name

Mol Cell Endocrinol

authors

Koepfer-Hobelsberger B,Wieland OH

doi

10.1016/0303-7207(84)90091-1

subject

Has Abstract

pub_date

1984-06-01 00:00:00

pages

123-9

issue

1-2

eissn

0303-7207

issn

1872-8057

pii

0303-7207(84)90091-1

journal_volume

36

pub_type

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