Effect of progesterone on insulin-like growth factors(IGFs) and IGF-binding proteins(IGFBPs) in female rat

암컷 랫트에서 Progesterone투여가 Insulin-like Growth Factors(IGFs) 및 IGF-binding proteins(IGFBPs)에 미치는 효과

  • Jin, Song-Jun (Bio-safety Research Institute, College of Veterinary Medicine, Chonbuk National University) ;
  • Park, Soo-Hyun (Bio-safety Research Institute, College of Veterinary Medicine, Chonbuk National University) ;
  • Kang, Chang-Won (Bio-safety Research Institute, College of Veterinary Medicine, Chonbuk National University)
  • 김송군 (전북대학교 수의과대학, 생체안전성연구소) ;
  • 박수현 (전북대학교 수의과대학, 생체안전성연구소) ;
  • 강창원 (전북대학교 수의과대학, 생체안전성연구소)
  • Accepted : 2002.11.28
  • Published : 2002.12.30

Abstract

The sex steroid hormone progesterone is essential for normal development and maturation of the endometrium in preparation for the embryo implantation and the maintenance of pregnancy. Insulin-like growth factor (IGF) system that is composed of IGF-I, IGF-II, IGF binding proteins (IGFBPs) is also involved in the maintenance of pregnancy. In addition, liver, kidney, and uterus is a target tissue for IGF system. However, the effect of exogenous progesterone on IGF system was not elucidated in female rats. Therefore, we investigated the effect of progesterone on insulin-like growth factors (IGFs) and IGF-binding proteins in serum, liver, kidney, and uterus in female ovariectomized rats. IGFs concentration was measured by radioimmuoassay (RIA) and IGFBPs levels by western ligand blotting(WLB). IGF-I concentration was increased in serum, liver, and uterus, but not in kidney of progesterone-treated ovariectomized rats, compared to control (P<0.05). IGF-II concentration was decreased in liver, but not in serum, kidney, and uterus of progesterone-treated rats, compared to control (P<0.05). IGFBP-3 was increased in serum, but not in liver of progesterone-treated rats, compared to control. IGFBP-2 was decreased in kidney, but not in others tissues of progesterone-treated rats, compared to control. These results suggest that progesterone may exert diverse physiological functions via the tissue-specific regulation of IGFs/IGFBPs system in female rats.

Keywords

References

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