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Vol. 158, Suppl. 1, 2012
Issue release date: May 2012

Obesity and Eosinophilic Inflammation: Does Leptin Play a Role

Takeda M. · Ueki S. · Kato H. · Konno Y. · Chihara M. · Itoga M. · Kobayashi Y. · Moritoki Y. · Ito W. · Kayaba H. · Chihara J.
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It has been pointed out that obesity is a risk factor for, and is involved in the exacerbation of asthma. Mounting evidence about adipose tissue-derived proteins (adipokines) gave rise to the current understanding of obesity as a systemic inflammatory disorder. In this review, we summarized the involvement of leptin, focusing on eosinophil functions. Several studies have indicated that leptin can restrain eosinophil apoptosis, enhance migration, increase adhesion molecules and induce cytokine production. Since leptin also acts on a variety of immune cells related to allergic response, increased leptin in obese individuals potentially explains the mechanism by which obesity leads to an exacerbation of asthma. Further studies targeting adipokines will delineate the association between obesity and eosinophil-associated diseases.

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