Effects of olanzapine on glucose transport, proliferation and survival in C2C12 myoblasts.

Abstract:

:The aim of our study was to investigate the direct effects of atypical antipsychotics on muscle cell functions in order to ascertain the diabetic liability of these drugs. We investigated the effects of olanzapine, clozapine and alpha-methyl-5-hydroxytryptamine on basal glucose uptake and glucose uptake in response to insulin using in vitro cultures of mouse skeletal muscle satellite cells (C2C12). We extended our study to the effects of these compounds on cell proliferation, survival and differentiation into myotubes and on the growth of differentiated myotubes. Olanzapine and alpha-methyl-5-HT stimulated 2-deoxyglucose uptake in C2C12 myoblasts in a dose-dependent manner (minimal effective dose: 2 microM olanzapine and 10 microM alpha-methyl-5-HT). The treatment with clozapine had no effect on glucose transport. Insulin and olanzapine increased the plasma membrane (PM) abundance of glucose transporter GLUT4. We investigated whether protein kinase Akt (PKB) and AMP-dependent kinase may participate in mediating olanzapine effects on glucose transport. Clozapine and olanzapine did not induce DNA laddering in differentiating myoblasts and differentiated myotubes and did not affect myotube growth. Olanzapine-induced glucose disposal in vitro is consistent with the acute lowering of plasma glucose/insulin concentrations that occurs in rats before olanzapine-induced overeating [Albaugh, V.L., Henry, C.R., Bello, N.T., Hajnal, A., Lynch, S.L., Halle, B., Lynch, C.J., 2006. Hormonal and metabolic effects of olanzapine and clozapine related to body weight in rodents. Obesity 14, 36-50].

journal_name

Mol Cell Endocrinol

authors

Tulipano G,Spano P,Cocchi D

doi

10.1016/j.mce.2008.04.010

subject

Has Abstract

pub_date

2008-09-24 00:00:00

pages

42-9

issue

1-2

eissn

0303-7207

issn

1872-8057

pii

S0303-7207(08)00152-4

journal_volume

292

pub_type

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