Direct and indirect effects of leptin on adipocyte metabolism

Research output: Contribution to journalReview article

104 Scopus citations

Abstract

Leptin is hypothesized to function as a negative feedback signal in the regulation of energy balance. It is produced primarily by adipose tissue and circulating concentrations correlate with the size of body fat stores. Administration of exogenous leptin to normal weight, leptin responsive animals inhibits food intake and reduces the size of body fat stores whereas mice that are deficient in either leptin or functional leptin receptors are hyperphagic and obese, consistent with a role for leptin in the control of body weight. This review discusses the effect of leptin on adipocyte metabolism. Because adipocytes express leptin receptors there is the potential for leptin to influence adipocyte metabolism directly. Adipocytes also are insulin responsive and receive sympathetic innervation, therefore leptin can also modify adipocyte metabolism indirectly. Studies published to date suggest that direct activation of adipocyte leptin receptors has little effect on cell metabolism in vivo, but that leptin modifies adipocyte sensitivity to insulin to inhibit lipid accumulation. In vivo administration of leptin leads to a suppression of lipogenesis, an increase in triglyceride hydrolysis and an increase in fatty acid and glucose oxidation. Activation of central leptin receptors also contributes to the development of a catabolic state in adipocytes, but this may vary between different fat depots. Leptin reduces the size of white fat depots by inhibiting cell proliferation both through induction of inhibitory circulating factors and by contributing to sympathetic tone which suppresses adipocyte proliferation. This article is part of a Special Issue entitled: Modulation of Adipose Tissue in Health and Disease.

Original languageEnglish (US)
Pages (from-to)414-423
Number of pages10
JournalBiochimica et Biophysica Acta - Molecular Basis of Disease
Volume1842
Issue number3
DOIs
StatePublished - Mar 1 2014

Keywords

  • Insulin
  • Leptin receptor
  • Lipogenesis
  • Lipolysis
  • Sympathetic nervous system

ASJC Scopus subject areas

  • Molecular Medicine
  • Molecular Biology

Fingerprint Dive into the research topics of 'Direct and indirect effects of leptin on adipocyte metabolism'. Together they form a unique fingerprint.

  • Cite this