Regulation of Insulin-Like Growth Factor I Receptor Gene Expression in Normal and Pathological States

  • Haim Werner
  • Bethel Stannard
  • Mark A. Bach
  • Charles T. RobertsJr.
  • Derek LeRoith
Part of the Advances in Experimental Medicine and Biology book series (AEMB, volume 293)


Most of the biological actions of insulin-like growth factor I (IGF-I)/somatomedin C are initiated by its binding to the IGF-I receptor, a heterotetrameric glycoprotein structurally related to the insulin receptor1. The presence of IGF-I receptors in most body tissues suggests that it mediates many different effects. Indeed, IGF-I has been shown to be involved not only in endocrine functions, such as the mediation of growth hormone’s effect on longitudinal growth, but it is also involved in many autocrine/paracrine systems at the local tissue level2,3. These biological actions include both short-term, metabolic effects (similar in nature to those stimulated by insulin) as well as long term, growth promoting actions. It is not surprising then, that the IGF- I receptor should be able to respond to various tissue — and development- specific stimuli. To study the expression of the IGF-I receptor gene in both physiological and pathological conditions in a convenient animal model, we undertook the cloning of rat IGF-I receptor cDNAs.


Granulosa Cell Diabetic Kidney RNase Protection Assay Receptor Gene Promoter Major Transcription Start Site 
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Copyright information

© Plenum Press, New York 1991

Authors and Affiliations

  • Haim Werner
    • 1
  • Bethel Stannard
    • 1
  • Mark A. Bach
    • 1
  • Charles T. RobertsJr.
    • 1
  • Derek LeRoith
    • 1
  1. 1.Section of Molecular and Cellular Physiology Diabetes Branch, NIDDKNational Institutes of HealthBethesdaUSA

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