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J Immunol. 2011 Nov 1;187(9):4517-29. doi: 10.4049/jimmunol.1101493. Epub 2011 Sep 23.

Sirtuin 1 promotes Th2 responses and airway allergy by repressing peroxisome proliferator-activated receptor-γ activity in dendritic cells.

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1
Laboratory of Cellular and Molecular Physiology, Interdisciplinary Cluster for Applied Genoproteomics (GIGA-Research), University of Liège, Liège B-4000, Belgium.

Abstract

Sirtuins are a unique class of NAD(+)-dependent deacetylases that regulate diverse biological functions such as aging, metabolism, and stress resistance. Recently, it has been shown that sirtuins may have anti-inflammatory activities by inhibiting proinflammatory transcription factors such as NF-κB. In contrast, we report in this study that pharmacological inhibition of sirtuins dampens adaptive Th2 responses and subsequent allergic inflammation by interfering with lung dendritic cell (DC) function in a mouse model of airway allergy. Using genetic engineering, we demonstrate that sirtuin 1 represses the activity of the nuclear receptor peroxisome proliferator-activated receptor-γ in DCs, thereby favoring their maturation toward a pro-Th2 phenotype. This study reveals a previously unappreciated function of sirtuin 1 in the regulation of DC function and Th2 responses, thus shedding new light on our current knowledge on the regulation of inflammatory processes by sirtuins.

PMID:
21948987
DOI:
10.4049/jimmunol.1101493
[Indexed for MEDLINE]
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