Estrogens increase expression of bone morphogenetic protein 8b in brown adipose tissue of mice.

Biology of sex differences (2015-04-14)
Aldo Grefhorst, Johanna C van den Beukel, E Leonie Af van Houten, Jacobie Steenbergen, Jenny A Visser, Axel Pn Themmen
RESUMEN

In mammals, white adipose tissue (WAT) stores fat and brown adipose tissue (BAT) dissipates fat to produce heat. Several studies showed that females have more active BAT. Members of the bone morphogenetic protein (BMP) and fibroblast growth factor (FGF) families are expressed in BAT and are involved in BAT activity. We hypothesized that differential expression of BMPs and FGFs might contribute to sex differences in BAT activity. We investigated the expression of BMPs and FGFs in BAT of male and female C57BL/6J mice upon gonadectomy, cold exposure, and exposure to sex steroids. Of the FGF family, BAT Fgf1, Fgf9, Fgf18, and Fgf21 expression was induced upon cold exposure, but only Fgf1 expression was obviously different between the sexes: females had 2.5-fold lower BAT Fgf1 than males. Cold exposure induced BAT Bmp4 and Bmp8b expression, but only Bmp8b differed between the sexes: females had 35-fold higher BAT Bmp8b than males. Ovariectomy almost completely blunted BAT Bmp8b expression, while orchidectomy had no effect. Male mice and ovariectomized female mice treated with diethylstilbestrol (DES) had approximately 350-fold and approximately 36-fold higher BAT Bmp8b expression, respectively. Ninety-day and 7-day treatment of female mice with dihydrotestosterone (DHT) decreased BAT Bmp8b expression by approximately fivefold and approximately fourfold, respectively. Finally, treatment of primary murine brown adipocytes with DES did not result in changes in Bmp8b expression. BAT Bmp8b expression in mice is positively regulated by presence of ovaries and estrogens such as DES.

MATERIALES
Referencia del producto
Marca
Descripción del producto

Sigma-Aldrich
HEPES, ≥99.5% (titration)
Sigma-Aldrich
D-(+)-Glucose, ≥99.5% (GC)
Sigma-Aldrich
HEPES, BioPerformance Certified, ≥99.5% (titration), suitable for cell culture
Sigma-Aldrich
D-(+)-Glucose, powder, BioReagent, suitable for cell culture, suitable for insect cell culture, suitable for plant cell culture, ≥99.5%
Sigma-Aldrich
Dextrose, meets EP, BP, JP, USP testing specifications, anhydrous
Sigma-Aldrich
D-(+)-Glucose, ACS reagent
Sigma-Aldrich
HEPES buffer solution, 1 M in H2O
Supelco
Dextrose, Pharmaceutical Secondary Standard; Certified Reference Material
Sigma-Aldrich
D-(+)-Glucose, BioXtra, ≥99.5% (GC)
Sigma-Aldrich
Rosiglitazone, ≥98% (HPLC)
SAFC
HEPES
Sigma-Aldrich
HEPES, BioUltra, for molecular biology, ≥99.5% (T)
USP
Dextrose, United States Pharmacopeia (USP) Reference Standard
Sigma-Aldrich
D-(+)-Glucose, BioUltra, anhydrous, ≥99.5% (sum of enantiomers, HPLC)
Supelco
D-(+)-Glucose, analytical standard
SAFC
HEPES
Sigma-Aldrich
HEPES, BioXtra, pH 5.0-6.5 (1 M in H2O), ≥99.5% (titration)
Sigma-Aldrich
Bicinchoninic acid disodium salt hydrate, ≥98% (HPLC)
Sigma-Aldrich
D-(+)-Glucose, suitable for mouse embryo cell culture, ≥99.5% (GC)
Sigma-Aldrich
HEPES, BioXtra, suitable for mouse embryo cell culture, ≥99.5% (titration)
Sigma-Aldrich
D-(+)-Glucose, tested according to Ph. Eur.
Sigma-Aldrich
HEPES, anhydrous, free-flowing, Redi-Dri, ≥99.5%
Sigma-Aldrich
D-(+)-Glucose, Hybri-Max, powder, BioReagent, suitable for hybridoma
Supelco
HEPES, Pharmaceutical Secondary Standard; Certified Reference Material
Supelco
Docosanoic acid tryptamide, analytical standard
Sigma-Aldrich
D-Glucose-12C6, 16O6, 99.9 atom % 16O, 99.9 atom % 12C
Sigma-Aldrich
Diethylstilbestrol, mixture of cis and trans, 97%