Porcine Insulin-Like Growth Factor (IGF) Binding Protein Blocks IGF-I Action on Porcine Adipose Tissue

P. E. Walton, R. Gopinath, T. D. Etherton

Research output: Contribution to journalArticle

20 Scopus citations

Abstract

A growth hormone-dependent insulin-like growth factor (IGF) binding protein (IGFBP) purified from porcine serum specifically blocked the acute insulin-like effects of IGF-I on lipogenesis and glucose oxidation in porcine adipose tissue. This inhibition was dose dependent with half-maximal effective concentrations of IGFBP of 530 ng/ml for lipogenesis and 590 ng/ml for glucose oxidation in the presence of 10-8 M IGF-I. The IGFBP also caused decreased rates of lipogenesis following a 1-hr preincubation of tissue with IGF-I (10-8 M). The IGFBP had no effect on insulin action on porcine adipose tissue. These findings demonstrate the inhibitory effects of a highly purified porcine serum IGFBP on the biologic effects of IGF-I in vitro, and provide evidence that the growth hormone-dependent IGFBP blocks the acute insulin-like actions of IGF-I in vivo.

Original languageEnglish (US)
Pages (from-to)315-319
Number of pages5
JournalProceedings of the Society for Experimental Biology and Medicine
Volume190
Issue number4
DOIs
StatePublished - Apr 1989

All Science Journal Classification (ASJC) codes

  • Biochemistry, Genetics and Molecular Biology(all)

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