Insulin-like growth factors and thecal-granulosa-cell function

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Abstract
Insulin-like growth factors (IGFs) belong to a family of low mol. wt, single chain plypeptides inducing growth promotion and insulin-like metabolism effects and regulating both cell replication and differentiation. Recent studies in laboratory animals suggest that IGFs play an important role as intraovarian regulators in several mammalian species. Tbe purpose of this article was to review current concepts of interactions between the IGFs and the thecal-granulosa-cell function. To provide a basic understanding of these interactions, we have first analysed data concerning biosynthesis, biochemical structure, pharmacokinetics, degradation, binding proteins and receptors for IGFs. Then we have discussed the specific interactions between IGFs and theca-granulosa-cell regulation, and analysed the significance of the relationship to the pathophysiology of some endocrine and reproductive disorders, including hyperandrogenism and female infertility.

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