Leptin

A potential novel antidepressant

Xinyun Lu, Chung Sub Kim, Alan Fraser, Wei Zhang

Research output: Contribution to journalArticle

298 Citations (Scopus)

Abstract

Leptin, a hormone secreted from adipose tissue, was originally discovered to regulate body weight. The localization of the leptin receptor in limbic structures suggests a potential role for leptin in emotional processes. Here, we show that rats exposed to chronic unpredictable stress and chronic social defeat exhibit low leptin levels in plasma. Systemic leptin treatment reversed the hedonic-like deficit induced by chronic unpredictable stress and improved behavioral despair dose-dependently in the forced swim test (FST), a model widely used for screening potential antidepressant efficacy. The behavioral effects of leptin in the FST were accompanied by increased neuronal activation in limbic structures, particularly in the hippocampus, Intrahippocampal infusion of leptin produced a similar antidepressant-like effect in the FST as its systemic administration. By contrast, infusion of leptin into the hypothalamus decreased body weight but had no effect on FST behavior. These findings suggest that: (i) impaired leptin production and secretion may contribute to chronic stress-induced depression-like phenotypes, (ii) the hippocampus is a brain site mediating leptin's antidepressant-like activity, and (iii) elevating leptin signaling in brain may represent a novel approach for the treatment of depressive disorders.

Original languageEnglish (US)
Pages (from-to)1593-1598
Number of pages6
JournalProceedings of the National Academy of Sciences of the United States of America
Volume103
Issue number5
DOIs
StatePublished - Jan 31 2006
Externally publishedYes

Fingerprint

Leptin
Antidepressive Agents
Hippocampus
Body Weight
Leptin Receptors
Pleasure
Brain
Depressive Disorder
Hypothalamus
Adipose Tissue
Hormones
Depression
Phenotype

Keywords

  • Depression
  • Forced swim test
  • Hippocampus
  • Social defeat
  • Stress

ASJC Scopus subject areas

  • General

Cite this

Leptin : A potential novel antidepressant. / Lu, Xinyun; Kim, Chung Sub; Fraser, Alan; Zhang, Wei.

In: Proceedings of the National Academy of Sciences of the United States of America, Vol. 103, No. 5, 31.01.2006, p. 1593-1598.

Research output: Contribution to journalArticle

Lu, Xinyun ; Kim, Chung Sub ; Fraser, Alan ; Zhang, Wei. / Leptin : A potential novel antidepressant. In: Proceedings of the National Academy of Sciences of the United States of America. 2006 ; Vol. 103, No. 5. pp. 1593-1598.
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