Regulation of expression of leptin mRNA and secretion of leptin by thyroid hormone in 3T3-L1 adipocytes

Tadashi Yoshida, Toshiaki Monkawa, Matsuhiko Hayashi, Takao Saruta

研究成果: Article査読

87 被引用数 (Scopus)

抄録

Leptin, the obese gene product, is secreted exclusively by adipocytes and regulates energy balance. We examined the effects of thyroid hormones on the regulation of leptin in 3T3-L1 adipocytes. Fully differentiated adipocytes were incubated with thyroid hormones, and the expression of leptin mRNA was measured by quantitative reverse transcription-polymerase chain reaction. After a 24-h incubation, triiodothyronine (T3) at 10-1000 nmol/l significantly increased the expression of leptin mRNA (237-337%). These stimulatory effects were not observed in preadipocytes. By contrast, thyroxine (T4) at 1-1000 nmol/l did not affect leptin mRNA expression in adipocytes. We also measured the levels of secreted leptin in conditioned media using radioimmunoassay. T3 at 10 and 1000 nmol/l significantly increased the levels of secreted leptin (132% and 126%, respectively) after a 24 h incubation. Our present data suggest that thyroid hormone is a novel regulator of leptin mRNA expression and protein secretion in 3T3-L1 adipocytes.

本文言語English
ページ(範囲)822-826
ページ数5
ジャーナルBiochemical and Biophysical Research Communications
232
3
DOI
出版ステータスPublished - 1997 3 27

ASJC Scopus subject areas

  • Biophysics
  • Biochemistry
  • Molecular Biology
  • Cell Biology

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