Abnormal lipid/lipoprotein metabolism and high plasma testosterone levels in male but not female aromatase-knockout mice

Akiko Amano, Yoshitaka Kondo, Yoshihiro Noda, Mitsuhiro Ohta, Noriaki Kawanishi, Shuichi Machida, Kazuteru Mitsuhashi, Takafumi Senmaru, Michiaki Fukui, Osamu Takaoka, Taisuke Mori, Jo Kitawaki, Masafumi Ono, Toshiji Saibara, Hiroshi Obayashi, Akihito Ishigami

研究成果: Article査読

15 被引用数 (Scopus)

抄録

Sex steroid hormones, such as estrogen and testosterone, are believed to play important roles in lipid metabolism. To elucidate the effects of estrogen depletion on lipid metabolism in male and female mice, we used aromatase-knockout (ArKO) mice, in which Cyp19 gene disruption prevented estrogen synthesis in vivo. These mice were divided into the following 4 groups: male and female ArKO mice and male and female wild-type (WT) mice. These mice were fed a normal-fat diet (13.6% fat) ad libitum. At 159 days after birth, the mice were tested for liver and plasma lipid content and hepatic hormone receptor- and lipid/lipoprotein metabolism-related gene expression. Interestingly, we found that hepatic steatosis was accompanied by markedly elevated plasma testosterone levels in male ArKO mice but not in female ArKO mice. Plasma lipoprotein profiles exhibited concurrent decreases in LDL- and small dense LDL-triglyceride (TG) levels in male ArKO mice. Moreover, male mice, but not female mice, exhibited marked elevations in androgen receptor (AR), sterol regulatory element-binding protein 1 (SREBP1), and CD36 expression. These results strongly suggest that Cyp19 gene disruption, which induces a sexually dimorphic response and high plasma testosterone levels in male mice, also induces hepatic steatosis.

本文言語English
ページ(範囲)47-58
ページ数12
ジャーナルArchives of Biochemistry and Biophysics
622
DOI
出版ステータスPublished - 2017 5 15
外部発表はい

ASJC Scopus subject areas

  • 生物理学
  • 生化学
  • 分子生物学

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