Alternative M2 activation of Kupffer cells by PPARdelta ameliorates obesity-induced insulin resistance.

Alternative M2 activation of Kupffer cells by PPARdelta ameliorates obesity-induced insulin resistance. Research Abstract Details 

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Alternative M2 activation of Kupffer cells by PPARdelta ameliorates obesity-induced insulin resistance. Abstract Text:

Macrophage infiltration and activation in metabolic tissues underlie obesity-induced insulin resistance and type 2 diabetes. While inflammatory activation of resident hepatic macrophages potentiates insulin resistance, the functions of alternatively activated Kupffer cells in metabolic disease remain unknown. Here we show that in response to the Th2 cytokine interleukin-4 (IL-4), peroxisome proliferator-activated receptor delta (PPARdelta) directs expression of the alternative phenotype in Kupffer cells and adipose tissue macrophages of lean mice. However, adoptive transfer of PPARdelta(-/-) (Ppard(-/-)) bone marrow into wild-type mice diminishes alternative activation of hepatic macrophages, causing hepatic dysfunction and systemic insulin resistance. Suppression of hepatic oxidative metabolism is recapitulated by treatment of primary hepatocytes with conditioned medium from PPARdelta(-/-) macrophages, indicating direct involvement of Kupffer cells in liver lipid metabolism. Taken together, these data suggest an unexpected beneficial role for alternatively activated Kupffer cells in metabolic syndrome and type 2 diabetes.

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Alternative M2 activation of Kupffer cells by PPARdelta ameliorates obesity-induced insulin resistance. Journal Published:

PUBLICATION TYPE: Research Support, Non-U.S. Gov

Journal: Cell metabolism

VOLUME: 7

Page Numbers: 496-507

Journal Abbreviation: Cell Metab.

ISSN: 1932-7420

DAY: 4

MONTH: Jun

YEAR: 2008

Alternative M2 activation of Kupffer cells by PPARdelta ameliorates obesity-induced insulin resistance. Information

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LANGUAGE: eng

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Grant and Affiliation Information for Alternative M2 activation of Kupffer cells by PPARdelta ameliorates obesity-induced insulin resistance.

AFFILIATION: Division of Endocrinology, Metabolism and Gerontology, Department of Medicine, Stanford University School of Medicine, Stanford, CA 94305-5103, USA.

Country: United States

AGENCY: United States NHLBI

GRANT: HL076746

ACRONYM: HL

MEDLINETA: Cell Metab

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