Insulin-like growth factor 1 mRNA expression in the uterus of streptozotocin-treated diabetic mice

Yoshie Manabe, Makoto Tochigi, Akiyoshi Moriwaki, Sakae Takeuchi, Sumio Takahashi

Research output: Contribution to journalArticle

4 Citations (Scopus)

Abstract

Reproductive functions decline with the onset of diabetes in female mice. Diabetic mice have smaller uteri with an underdeveloped endometrium, suggesting diminished estrogen-induced growth. We aimed to clarify the changes in the estrous cycle and in insulin-like growth factor 1 (IGF1) expression in the uteri of streptozotocin (STZ)-treated diabetic mice, because IGF1 is one of the main growth factors involved in estrogen-induced uterine growth. ICR female mice were intraperitoneally administered STZ (10 mg/100 g BW), and blood glucose levels were determined. Mice with blood glucose levels > 200 mg/dl were classified as diabetic mice. The onset of diabetes was associated with acyclic estrous cycles. Diabetes was also induced with STZ in ovariectomized mice. Uterine Igf1 mRNA levels were reduced in ovariectomized STZ-treated diabetic mice. Estrogen is known to stimulate Igf1 mRNA expression in the uterus, but estrogen action was abolished in the uteri of STZ-treated diabetic mice. mRNA expressions of estrogen receptor α (ERα) and steroid hormone receptor coactivators (SRC-1/Ncoa1, SRC-2/Ncoa2, SRC-3/Ncoa3 and CBP/p300/Crebbp) were reduced in the uteri of ovariectomized STZ-treated diabetic mice. The present study demonstrates that diabetes induces a decline in female reproductive functions in mice. Igf1 expression in ovariectomized diabetic female mice was decreased, and decreased responsiveness to estrogen in the uteri of diabetic mice is probably associated with a reduction in ERα and steroid receptor coactivator mRNA expression.

Original languageEnglish
Pages (from-to)398-404
Number of pages7
JournalJournal of Reproduction and Development
Volume59
Issue number4
DOIs
Publication statusPublished - Aug 27 2013

Keywords

  • Diabetes
  • Insulin-like growth factor 1 (IGF1)
  • Mouse
  • Uterus

ASJC Scopus subject areas

  • Animal Science and Zoology

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