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Exp Clin Endocrinol Diabetes 2013; 121(02): 94-101
DOI: 10.1055/s-0033-1333780
Article
© J. A. Barth Verlag in Georg Thieme Verlag KG Stuttgart · New York

Cholesterol Homeostasis in the Ovaries of Neonatally Diethylstilbestrol-treated Mice

H. Kakuta
1   International Graduate School of Arts and Sciences, Yokohama City University, Yokohama, Japan
,
A. Matsushita
2   School of Advanced Sciences, The Graduate University for Advanced Studies, Hayama, Japan
,
K. Arikawa
2   School of Advanced Sciences, The Graduate University for Advanced Studies, Hayama, Japan
,
T. Iguchi
3   The Graduate University for Advanced Studies and Okazaki Institute for Integrative Bioscience, National Institute for Basic Biology, National Institutes of Natural Sciences, Okazaki, Japan
,
T. Sato
1   International Graduate School of Arts and Sciences, Yokohama City University, Yokohama, Japan
› Author Affiliations
Further Information

Publication History

received 12 August 2011
first decision 29 December 2011

accepted 06 February 2012

Publication Date:
20 February 2013 (online)

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Abstract

In the ovary of neonatally DES-treated mice, lipid droplets accumulation was observed in the hypertrophied interstitial tissues. Our previous results demonstrated that the impaired steroidogenesis in the ovary of neonatally DES-treated mice was caused by altered gonadotropins levels, and resulted in the hypertrophy of ovarian interstitial cells. We speculated that lipid droplets in the ovary mainly consisted of cholesterol. This study was aimed to examine the effects of neonatal DES on cholesterol homeostasis in the ovary. The serum and ovarian total cholesterol concentrations in 3-month-old neonatally DES-treated mice were significantly higher than those in the neonatally oil-treated mice, but triglyceride concentrations were not altered. In the ovary of neonatally DES-treated mice, expression of Hmgcr, a rate-limiting enzyme in de novo cholesterol biosynthesis, was reduced but expression of Ldlr and Scarb1, involved in cholesterol uptake, was not changed. These results suggest that cholesterol uptake is not altered in the ovary of 3-month-old neonatally DES-treated mice. However, the expression of Acat1, the microsomal acyl coenzyme A cholesterol acyltransferase which is involved in cholesterol esterification and storing was increased compared with that in the ovary of neonatally oil-treated mice. Since ovarian steroidogenesis in neonatally DES-treated mice was impaired, synthesized and/or obtained cholesterol from the blood may not be used sufficiently. Thus, in the ovary of neonatally DES-treated mice, cholesterol is esterified by ACAT1 and stored in the interstitial cells.

Key words

diethylstilbestrol - cholesterol homeostasis - ovary - lipid droplets

Supplementary Material

 

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