Unsaturated Fatty Acids Prevent Activation of NLRP3 Inflammasome in Human Monocytes/macrophages

Overview

Journal J Lipid Res

Publisher Elsevier

Specialty Biochemistry

Date 2013 Sep 6

PMID 24006511

Citations 65

Authors

Laurent Lhomme

Nathalie Esser

Laura Riva

Andre Scheen

Nicolas Paquot

Jacques Piette

Sylvie Legrand-Poels

Affiliations

Soon will be listed here.

Abstract

The NLRP3 inflammasome is involved in many obesity-associated diseases, such as type 2 diabetes, atherosclerosis, and gouty arthritis, through its ability to induce interleukin (IL)-1β release. The molecular link between obesity and inflammasome activation is still unclear, but free fatty acids have been proposed as one triggering event. Here we reported opposite effects of saturated fatty acids (SFAs) compared with unsaturated fatty acids (UFAs) on NLRP3 inflammasome in human monocytes/macrophages. Palmitate and stearate, both SFAs, triggered IL-1β secretion in a caspase-1/ASC/NLRP3-dependent pathway. Unlike SFAs, the UFAs oleate and linoleate did not lead to IL-1β secretion. In addition, they totally prevented the IL-1β release induced by SFAs and, with less efficiency, by a broad range of NLRP3 inducers, including nigericin, alum, and monosodium urate. UFAs did not affect the transcriptional effect of SFAs, suggesting a specific effect on the NLRP3 activation. These results provide a new anti-inflammatory mechanism of UFAs by preventing the activation of the NLRP3 inflammasome and, therefore, IL-1β processing. By this way, UFAs might play a protective role in NLRP3-associated diseases.

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