Chronic Administration of Growth Hormone (GH) to Adult Chickens Exerts Marked Effects on Circulating Concentrations of Insulin-like Growth Factor-I (IGF-I), IGF Binding Proteins, Hepatic GH Regulated Gene I, and Hepatic GH Receptor MRNA

Overview

Journal Endocrine

Specialty Endocrinology

Date 1997 Apr 1

PMID 9225125

Citations 1

Authors

S V Radecki

S K Agarwal

J Burnside

J A Proudman

C G Scanes

Affiliations

Soon will be listed here.

Abstract

In young birds, growth hormone (GH) administration has been found to have only a small or even no effect on circulating concentrations of insulin-like growth factor-I (IGF-I). This is in obvious contrast to the situation in mammals. The present study examines the effect of continuous administration of GH in adult male chickens. Plasma concentrations of IGF-I were markedly elevated (2.5-3.0-fold, p < 0.001) in GH-treated chickens. There were also some transient increases in the circulating levels of IGF binding proteins. Adult chickens showed other manifestations of increased responsiveness to GH, including elevated hepatic expression of GH-regulated gene-I (mRNA) with GH treatment (p < 0.05), and a tendency (p < 0.08) for decreased GH-receptor mRNA. In contrast to the changes in circulating concentrations of GH and IGF-I with GH treatment, no changes in plasma concentrations of thyroid hormones, reproductive hormones, glucose, or nonesterified fatty acids were evident.

Citing Articles

Growth hormone (GH) action in the brain: neural expression of a GH-response gene.

Harvey S, Lavelin I, Pines M J Mol Neurosci. 2002; 18(1-2):89-95.

PMID: 11931354 DOI: 10.1385/JMN:18:1-2:89.

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