Unknown

Dataset Information

0

The NLRP3 inflammasome instigates obesity-induced inflammation and insulin resistance.


ABSTRACT: The emergence of chronic inflammation during obesity in the absence of overt infection or well-defined autoimmune processes is a puzzling phenomenon. The Nod-like receptor (NLR) family of innate immune cell sensors, such as the nucleotide-binding domain, leucine-rich-containing family, pyrin domain-containing-3 (Nlrp3, but also known as Nalp3 or cryopyrin) inflammasome are implicated in recognizing certain nonmicrobial originated 'danger signals' leading to caspase-1 activation and subsequent interleukin-1? (IL-1?) and IL-18 secretion. We show that calorie restriction and exercise-mediated weight loss in obese individuals with type 2 diabetes is associated with a reduction in adipose tissue expression of Nlrp3 as well as with decreased inflammation and improved insulin sensitivity. We further found that the Nlrp3 inflammasome senses lipotoxicity-associated increases in intracellular ceramide to induce caspase-1 cleavage in macrophages and adipose tissue. Ablation of Nlrp3 in mice prevents obesity-induced inflammasome activation in fat depots and liver as well as enhances insulin signaling. Furthermore, elimination of Nlrp3 in obese mice reduces IL-18 and adipose tissue interferon-? (IFN-?) expression, increases naive T cell numbers and reduces effector T cell numbers in adipose tissue. Collectively, these data establish that the Nlrp3 inflammasome senses obesity-associated danger signals and contributes to obesity-induced inflammation and insulin resistance.

SUBMITTER: Vandanmagsar B 

PROVIDER: S-EPMC3076025 | biostudies-literature | 2011 Feb

REPOSITORIES: biostudies-literature

altmetric image

Publications

The NLRP3 inflammasome instigates obesity-induced inflammation and insulin resistance.

Vandanmagsar Bolormaa B   Youm Yun-Hee YH   Ravussin Anthony A   Galgani Jose E JE   Stadler Krisztian K   Mynatt Randall L RL   Ravussin Eric E   Stephens Jacqueline M JM   Dixit Vishwa Deep VD  

Nature medicine 20110109 2


The emergence of chronic inflammation during obesity in the absence of overt infection or well-defined autoimmune processes is a puzzling phenomenon. The Nod-like receptor (NLR) family of innate immune cell sensors, such as the nucleotide-binding domain, leucine-rich-containing family, pyrin domain-containing-3 (Nlrp3, but also known as Nalp3 or cryopyrin) inflammasome are implicated in recognizing certain nonmicrobial originated 'danger signals' leading to caspase-1 activation and subsequent in  ...[more]

Similar Datasets

2023-11-06 | PXD045836 | Pride
| S-EPMC7104778 | biostudies-literature
2015-05-18 | E-GEOD-58952 | biostudies-arrayexpress
| S-EPMC8882720 | biostudies-literature
| S-EPMC7109060 | biostudies-literature
| S-EPMC6648799 | biostudies-literature
| S-EPMC7933514 | biostudies-literature
| S-EPMC2844841 | biostudies-other
2015-05-18 | GSE58952 | GEO
| S-EPMC4167757 | biostudies-literature