Journal
ENDOCRINOLOGY AND METABOLISM CLINICS OF NORTH AMERICA
Volume 41, Issue 2, Pages 283-+Publisher
W B SAUNDERS CO-ELSEVIER INC
DOI: 10.1016/j.ecl.2012.04.011
Keywords
Insulin-like growth factors; Growth hormone; Adipogenesis; Obesity
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Adipose tissue has been recognized as a major target of growth hormone (OH) action. GH was shown to inhibit adipocyte differentiation but stimulated preadipocyte proliferation in vitro. OH acts directly via its receptor or via upregulating insulin-like growth factor (IGF)-I, which is a critical mediator of preadipocyte proliferation, differentiation, and survival. Results from clinical studies on GH treatment in patients with GH deficiency or GH insensitivity syndrome can be used to dissect GH and IGF as well as IGF-binding protein (IGFBP) actions in vivo. In this article, changes of the GH/IGF system during adipocyte differentiation in vitro as well as related signaling pathways and their impact on adipose tissue growth and function are discussed. Clinical considerations include the effects of GH and IGF-I on adipose tissue during treatment of GH deficiency, differences in the IGF system between visceral and subcutaneous adipose tissue depots as well as the recently emerging role for adipose tissue in the regulation of glucose homeostasis.
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