title: Late onset of obesity in male androgen receptor-deficient (AR KO) mice.
abstract: An androgen receptor (AR) null mutant mice line was generated by means of a Cre-lox P system. The male (AR(L-/Y)) (KO) mice exhibited typical features of testicular feminization mutant (Tfm) disease in external reproductive organs with growth retardation. The growth curve of the male AR KO mice was similar to that of the wild-type female littermates until the 10th week of age, but thereafter a drastic increase in the growth was observed with development of obesity. Clear increase in the wet weights of white adipose tissues, but not of brown adipose tissue, was found in the 30-week-old male AR KO mice. However, no significant alteration in serum lipid parameters and food intake was observed. Thus, the present results suggest that AR may serve as a negative regulator of adipose development in adult males.
authors.affiliation: Institute of Molecular and Cellular Biosciences, University of Tokyo, 1-1-1 Yayoi, Bunkyo-ku, Japan.
authors.forename: Takashi
authors.initials: T
authors.lastname: Sato
authors.forename: Takahiro
authors.initials: T
authors.lastname: Matsumoto
authors.forename: Takashi
authors.initials: T
authors.lastname: Yamada
authors.forename: Tomoyuki
authors.initials: T
authors.lastname: Watanabe
authors.forename: Hirotaka
authors.initials: H
authors.lastname: Kawano
authors.forename: Shigeaki
authors.initials: S
authors.lastname: Kato
mesh_terms: D017667:Adipocytes / Q000187:drug effects / Q000473:pathology; D000273:Adipose Tissue / Q000187:drug effects / Q000254:growth & development / Q000473:pathology; D000367:Age Factors; D000818:Animals; D013196:Dihydrotestosterone / Q000494:pharmacology; D004958:Estradiol / Q000494:pharmacology; D005260:Female; D050356:Lipid Metabolism; D008297:Male; D051379:Mice; D018345:Mice, Knockout; D009765:Obesity / Q000209:etiology* / Q000235:genetics / Q000378:metabolism / Q000473:pathology; D011944:Receptors, Androgen / Q000172:deficiency* / Q000235:genetics
chemical_list: D011944:Receptors, Androgen; D013196:Dihydrotestosterone; D004958:Estradiol