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http://dx.doi.org/10.3339/jkspn.2011.15.2.125

$17{\beta}$-estradiol Attenuates Renal Fibrosis in Mice with Obstructive Uropathy  

Cho, Min-Hyun (Department of Pediatrics, Kyungpook National University School of Medicine)
Jang, Hee-Seong (Department of Anatomy, Kyungpook National University School of Medicine)
Jung, Kyung-Jin (Department of Anatomy, Kyungpook National University School of Medicine)
Park, Kwon-Moo (Department of Anatomy, Kyungpook National University School of Medicine)
Publication Information
Childhood Kidney Diseases / v.15, no.2, 2011 , pp. 125-137 More about this Journal
Abstract
Purpose : Men are generally more prone to chronic renal disease and progression to end stage renal disease than women. The purpose of this study is to prove the effect of gender and sex hormone on renal fibrosis in mice with unilateral ureteral obstruction (UUO) and to elucidate the specific underlying mechanisms. Methods :We compared the expression of ${\alpha}$-smooth muscle actin (${\alpha}$-SMA) in female and male mice with complete UUO (day 7). After this, we estimated the changes of renal fibrosis in the female mice with oophorectomy and in the female mice with oophorectomy and replacement of $17{\beta}$-estradiol, respectively. Results : The level of ${\alpha}$-SMA in the female kidney with UUO was significantly lower than that in the male kidney with UUO. oophorectomy and replacement of $17{\beta}$-estradiol did not change the expression of angiotensin II type 1 (AT1) receptor in the female kidney with UUO, whereas the expression of angiotensin II type 2 (AT2) receptor was significantly more elevated in the intact female (IF) and the oophorectomized female with estrogen (OF+E) than that in the oophorectomized female (OF). The expressions of inducible nitric oxide synthase (iNOS) in the IF and OF+E mice were significantly more elevated than that in the OF mice, which was similar to the expression of AT2 receptor. Conclusion : The female gender is associated with resistance to renal fibrosis in obstructive uropathy and this gender difference may originate from the existence of $17{\beta}$-estradiol, which has an anti-fibrotic effect via upregulation of the AT2 receptor and iNOS.
Keywords
Renal fibrosis; Ureteral obstruction; Gender; $17{\beta}$-estradiol;
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