Decreased triglyceride-rich lipoproteins in transgenic skinny mice overexpressing leptin

Naoki Matsuoka, Yoshihiro Ogawa, Hiroaki Masuzaki, Ken Ebihara, Megumi Aizawa-Abe, Noriko Satoh, Eiichiro Ishikawa, Yukio Fujisawa, Atsushi Kosaki, Kazunori Yamada, Hideshi Kuzuya, Kazuwa Nakao

研究成果: Contribution to journalArticle査読

23 被引用数 (Scopus)

抄録

Leptin is an adipocyte-derived circulating satiety factor with a variety of biological effects. Evidence has accumulated suggesting that leptin may modulate glucose and lipid metabolism. In the present study, we examined lipid metabolism in transgenic skinny mice with elevated plasma leptin concentrations. The plasma concentrations of triglycerides and free fatty acids in transgenic skinny mice were 71.5 (P < 0.01) and 89.1% (P < 0.05) of those in their nontransgenic littermates, respectively. Separation of plasma into lipoprotein classes by ultracentrifugation revealed that very low density lipoprotein-triglyceride concentrations were markedly reduced in transgenic skinny mice relative to the controls. The clearance of triglycerides estimated by a fat-loading test was enhanced in transgenic skinny mice; the triglyceride concentration in transgenic skinny mice 3 h after fat loading was 39.7% (P < 0.05) of that of their nontransgenic littermates. Postheparin plasma lipoprotein lipase activity increased 1.4-fold (P < 0.05) in transgenic skinny mice. Our data demonstrated a significant reduction in plasma triglyceride concentrations, accompanied by increased lipoprotein lipase activity in transgenic skinny mice overexpressing leptin, suggesting that leptin plays a role in long-term triglyceride metabolism.

本文言語英語
ページ(範囲)E334-E339
ジャーナルAmerican Journal of Physiology - Endocrinology and Metabolism
280
2 43-2
DOI
出版ステータス出版済み - 2 2001
外部発表はい

All Science Journal Classification (ASJC) codes

  • 内分泌学、糖尿病および代謝内科学
  • 生理学
  • 生理学(医学)

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