Dexamethasone and acetate modulate cytoplasmic leptin in bovine preadipocytes

Shinichi Yonekura, Shohei Hirota, Yukako Tokutake, Michael T. Rose, Kazuo Katoh, Hisashi Aso

研究成果: Article査読

2 被引用数 (Scopus)

抄録

Hormonal and nutrient signals regulate leptin synthesis and secretion. In rodents, leptin is stored in cytosolic pools of adipocytes. However, not much information is available regarding the regulation of intracellular leptin in ruminants. Recently, we demonstrated that leptin mRNA was expressed in bovine intramuscular preadipocyte cells (BIP cells) and that a cytoplasmic leptin pool may be present in preadipocytes. In the present study, we investigated the expression of cytoplasmic leptin protein in BIP cells during differentiation as well as the effects of various factors added to the differentiation medium on its expression in BIP cells. Leptin mRNA expression was observed only at 6 and 8 days after adipogenic induction, whereas the cytoplasmic leptin concentration was the highest on day 0 and decreased gradually thereafter. Cytoplasmic leptin was detected at 6 and 8 days after adipogenic induction, but not at 4 days after adipogenic induction. The cytoplasmic leptin concentration was reduced in BIP cells at 4 days after treatment with dexamethasone, whereas cytoplasmic leptin was not observed at 8 days after treatment. In contrast, acetate significantly enhanced the cytoplasmic leptin concentration in BIP cells at 8 days after treatment, although acetate alone did not induce adipocyte differentiation in BIP cells. These results suggest that dexamethasone and acetate modulate the cytoplasmic leptin concentration in bovine preadipocytes.

本文言語English
ページ(範囲)567-573
ページ数7
ジャーナルAsian-Australasian Journal of Animal Sciences
27
4
DOI
出版ステータスPublished - 2014 4

ASJC Scopus subject areas

  • 食品科学
  • 動物科学および動物学
  • 工学(全般)

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