Regulation of hepatic expression of IGF I and fetal IGF binding protein mRNA in streptozotocin‐diabetic rats
- 17 July 1989
- journal article
- Published by Wiley in FEBS Letters
- Vol. 251 (1-2) , 253-256
- https://doi.org/10.1016/0014-5793(89)81465-6
Abstract
Hepatic mRNA levels of insulin-like growth factor I (IGF I) and of the fetal, nonglycosylated 32 kDa IGF-binding protein (BP) were analysed in diabetic, diabetic insulin- and IGF I-treated rats as well as in age-matched, healthy control animals. IGF I mRNA levels are reduced in diabetic rats and increased by insulin treatment. In contrast, the infusion of IGF I does not significantly upregulate IGF I mRNA levels. Fetal IGF BP mRNA expression is very low in healthy control animals, but high levels are found in diabetic rats. Insulin therapy lowers fetal IGF BP mRNA levels, whereas IGF I has no efrect. We propose that insulin is a major regulator of the 32 kDa IGF BP levels in adult rats.Keywords
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