Insulin-like growth factor-I in muscle metabolism and myotherapies.

Abstract:

:The critical anabolic and trophic role of signaling by insulin-like growth factors (IGF) I and II via the type-I IGF receptor (IGF-IR) is reviewed throughout the life of skeletal myocytes. The proliferative effects of IGF-IR stimulation, both during embryogenesis and during satellite cell proliferation following denervation or muscle injury, are mediated primarily through activation of mitogen-activated protein kinases. Signaling through phosphatidylinositol 3-kinase is essential to muscle protein synthesis and glucose uptake and may contribute to the observed resilience of mature muscle to programmed cell death. Degeneration or inhibition of the GH--IGF-I axis by aging, cachexia, sepsis, diabetes, drugs, and disuse all enhance muscle catabolism, and opposition of these effects by IGF-I may form the basis of effective myotherapy.

journal_name

Neurobiol Dis

journal_title

Neurobiology of disease

authors

Singleton JR,Feldman EL

doi

10.1006/nbdi.2001.0416

keywords:

subject

Has Abstract

pub_date

2001-08-01 00:00:00

pages

541-54

issue

4

eissn

0969-9961

issn

1095-953X

pii

S0969-9961(01)90416-4

journal_volume

8

pub_type

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