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Ringling RE, Gastecki ML, Woodford ML, Lum-Naihe KJ, Grant RW, Pulakat L, Vieira-Potter VJ, Padilla J. Loss of Nlrp3 Does Not Protect Mice from Western Diet-Induced Adipose Tissue Inflammation and Glucose Intolerance. PLoS One 2016; 11:e0161939. [PMID: 27583382 PMCID: PMC5008778 DOI: 10.1371/journal.pone.0161939] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/13/2016] [Accepted: 08/15/2016] [Indexed: 02/03/2023] Open
Abstract
We tested the hypothesis that loss of Nlrp3 would protect mice from Western diet-induced adipose tissue (AT) inflammation and associated glucose intolerance and cardiovascular complications. Five-week old C57BL6J wild-type (WT) and Nlrp3 knockout (Nlrp3-/-) mice were randomized to either a control diet (10% kcal from fat) or Western diet (45% kcal from fat and 1% cholesterol) for 24 weeks (n = 8/group). Contrary to our hypothesis that obesity-mediated white AT inflammation is Nlrp3-dependent, we found that Western diet-induced expression of AT inflammatory markers (i.e., Cd68, Cd11c, Emr1, Itgam, Lgals, Il18, Mcp1, Tnf, Ccr2, Ccl5 mRNAs, and Mac-2 protein) were not accompanied by increased caspase-1 cleavage, a hallmark feature of NLRP3 inflammasome activation. Furthermore, Nlrp3 null mice were not protected from Western diet-induced white or brown AT inflammation. Although Western diet promoted glucose intolerance in both WT and Nlrp3-/- mice, Nlrp3-/- mice were protected from Western diet-induced aortic stiffening. Additionally, Nlrp3-/- mice exhibited smaller cardiomyocytes and reduced cardiac fibrosis, independent of diet. Collectively, these findings suggest that presence of the Nlrp3 gene is not required for Western diet-induced AT inflammation and/or glucose intolerance; yet Nlrp3 appears to play a role in potentiating arterial stiffening, cardiac hypertrophy and fibrosis.
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Affiliation(s)
- Rebecca E. Ringling
- Department of Nutrition and Exercise Physiology, University of Missouri, Columbia, Missouri, United States of America
| | - Michelle L. Gastecki
- Department of Nutrition and Exercise Physiology, University of Missouri, Columbia, Missouri, United States of America
| | - Makenzie L. Woodford
- Department of Nutrition and Exercise Physiology, University of Missouri, Columbia, Missouri, United States of America
| | - Kelly J. Lum-Naihe
- Department of Medical Pharmacology and Physiology, University of Missouri, Columbia, Missouri, United States of America
| | - Ryan W. Grant
- Department of Nutrition Science, Purdue University, West Lafayette, Indiana, United States of America
| | - Lakshmi Pulakat
- Department of Nutrition and Exercise Physiology, University of Missouri, Columbia, Missouri, United States of America
- Department of Medicine, University of Missouri, Columbia, Missouri, United States of America
- Research Service, Harry S Truman Memorial Veterans Affairs Hospital, Columbia, Missouri, United States of America
| | - Victoria J. Vieira-Potter
- Department of Nutrition and Exercise Physiology, University of Missouri, Columbia, Missouri, United States of America
| | - Jaume Padilla
- Department of Nutrition and Exercise Physiology, University of Missouri, Columbia, Missouri, United States of America
- Dalton Cardiovascular Research Center, University of Missouri, Columbia, Missouri, United States of America
- Department of Child Health, University of Missouri, Columbia, Missouri, United States of America
- * E-mail:
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