Unexpected trafficking of immune cells within the adipose tissue during the onset of obesity. - Archive ouverte HAL Access content directly
Journal Articles Biochemical and Biophysical Research Communications Year : 2009

Unexpected trafficking of immune cells within the adipose tissue during the onset of obesity.

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Abstract

The primary inflammatory events occurring in the adipose tissue (AT) during high fat diet (HFD)-induced obesity are poorly defined. The present study was undertaken to characterize, in wild-type(+/+) and lymphocyte deficient RAG2(-/-) mice under HFD, the changes in AT immune cells by flow cytometry analyses. In (+/+) mice, early accumulation of AT B-cells was observed, followed by increased AT T-cell numbers and finally by the appearance of insulin resistance and AT macrophage accumulation. Lack of lymphocytes in the RAG2(-/-) mice did not affect the onset of obesity and the state of insulin resistance. However, a striking accumulation of AT NK cells and activated macrophages was detected. The present study demonstrates that AT is the site of an unexpected dynamic in innate and adaptive cells during diet-induced obesity and insulin resistance. Moreover it appears that early AT lymphocyte infiltration could be considered a protective process to temper adipose tissue inflammation.
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inserm-00410102 , version 1 (17-08-2009)

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Carine Duffaut, Jean Galitzky, Max Lafontan, Anne Bouloumié. Unexpected trafficking of immune cells within the adipose tissue during the onset of obesity.. Biochemical and Biophysical Research Communications, 2009, 384 (4), pp.482-5. ⟨10.1016/j.bbrc.2009.05.002⟩. ⟨inserm-00410102⟩
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