| Budget Amount *help |
¥5,590,000 (Direct Cost: ¥4,300,000、Indirect Cost: ¥1,290,000)
Fiscal Year 2014: ¥1,170,000 (Direct Cost: ¥900,000、Indirect Cost: ¥270,000)
Fiscal Year 2013: ¥1,690,000 (Direct Cost: ¥1,300,000、Indirect Cost: ¥390,000)
Fiscal Year 2012: ¥2,730,000 (Direct Cost: ¥2,100,000、Indirect Cost: ¥630,000)
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| Outline of Final Research Achievements |
To investigate the effects of endocrine disruptors on the hypothalamus-pituitary-gonad axis, LH-secreting gonadotropes and the expression of genes involved in the synthesis and secretion of gonadotropins in the anterior pituitary of neonatally diethylstilbestrol (DES) mice were examined. The percentage of LH-secreting gonadotropes in the medial area of 90-day-old neoDES females was significantly lower than that of 90-day-old neoOil females. Ovariectomy increased the expression of the alpha subunit of glycoprotein hormones, FSH beta subunit and Lhb subunit both in neoOil and neoDES females, suggesting that the anterior pituitary of neoDES female mice is regulated by ovarian hormones via negative feedback. These results suggest that LH-secreting gonadotropes in the female mice are not only directly affected by neoDES but also are influenced by the masculinization of the hypothalamus. That is, neonatal DES exposure can masculinize or defeminize the hypothalamus of female mice.
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