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Habibi J, Homan C, Naz H, Chen D, Lastra G, Whaley-Connell A, Sowers JR, Jia G. Endothelial MRs Mediate Western Diet-Induced Lipid Disorders and Skeletal Muscle Insulin Resistance in Females. Endocrinology 2023; 164:bqad091. [PMID: 37289042 PMCID: PMC10284339 DOI: 10.1210/endocr/bqad091] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/18/2023] [Revised: 05/18/2023] [Accepted: 06/06/2023] [Indexed: 06/09/2023]
Abstract
Consumption of a Western diet (WD) consisting of excess fat and carbohydrates activates the renin-angiotensin-aldosterone system, which has emerged as an important risk factor for systemic and tissue insulin resistance. We recently discovered that activated mineralocorticoid receptors (MRs) in diet-induced obesity induce CD36 expression, increase ectopic lipid accumulation, and result in systemic and tissue insulin resistance. Here, we have further investigated whether endothelial cell (EC)-specific MR (ECMR) activation participates in WD-induced ectopic skeletal muscle lipid accumulation, insulin resistance, and dysfunction. Six-week-old female ECMR knockout (ECMR-/-) and wild-type (ECMR+/+) mice were fed either a WD or a chow diet for 16 weeks. ECMR-/- mice were found to have decreased WD-induced in vivo glucose intolerance and insulin resistance at 16 weeks. Improved insulin sensitivity was accompanied by increased glucose transporter type 4 expression in conjunction with improved soleus insulin metabolic signaling in phosphoinositide 3-kinases/protein kinase B and endothelial nitric oxide synthase activation. Additionally, ECMR-/- also blunted WD-induced increases in CD36 expression and associated elevations in soleus free fatty acid, total intramyocellular lipid content, oxidative stress, and soleus fibrosis. Moreover, in vitro and in vivo activation of ECMR increased EC-derived exosomal CD36 that was further taken up by skeletal muscle cells, leading to increased skeletal muscle CD36 levels. These findings indicate that in the context of an obesogenic WD, enhanced ECMR signaling increases EC-derived exosomal CD36 resulting in increased uptake and elevated concentrations of CD36 in skeletal muscle cells, contributing to increased lipid metabolic disorders and soleus insulin resistance.
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Affiliation(s)
- Javad Habibi
- Department of Medicine-Endocrinology and Metabolism, University of Missouri School of Medicine, Columbia, MO, 65212, USA
- Research Service, Harry S Truman Memorial Veterans Hospital, Research Service, 800 Hospital Dr, Columbia, MO, 65201, USA
| | - Carlton Homan
- Department of Medicine-Endocrinology and Metabolism, University of Missouri School of Medicine, Columbia, MO, 65212, USA
| | - Huma Naz
- Department of Medicine-Endocrinology and Metabolism, University of Missouri School of Medicine, Columbia, MO, 65212, USA
- Research Service, Harry S Truman Memorial Veterans Hospital, Research Service, 800 Hospital Dr, Columbia, MO, 65201, USA
| | - Dongqing Chen
- Department of Medicine-Endocrinology and Metabolism, University of Missouri School of Medicine, Columbia, MO, 65212, USA
- Research Service, Harry S Truman Memorial Veterans Hospital, Research Service, 800 Hospital Dr, Columbia, MO, 65201, USA
| | - Guido Lastra
- Department of Medicine-Endocrinology and Metabolism, University of Missouri School of Medicine, Columbia, MO, 65212, USA
- Research Service, Harry S Truman Memorial Veterans Hospital, Research Service, 800 Hospital Dr, Columbia, MO, 65201, USA
| | - Adam Whaley-Connell
- Department of Medicine-Endocrinology and Metabolism, University of Missouri School of Medicine, Columbia, MO, 65212, USA
- Department of Medicine–Nephrology and Hypertension, University of Missouri School of Medicine, Columbia, MO 65212, USA
- Research Service, Harry S Truman Memorial Veterans Hospital, Research Service, 800 Hospital Dr, Columbia, MO, 65201, USA
| | - James R Sowers
- Department of Medicine-Endocrinology and Metabolism, University of Missouri School of Medicine, Columbia, MO, 65212, USA
- Department of Medicine–Nephrology and Hypertension, University of Missouri School of Medicine, Columbia, MO 65212, USA
- Research Service, Harry S Truman Memorial Veterans Hospital, Research Service, 800 Hospital Dr, Columbia, MO, 65201, USA
- Dalton Cardiovascular Research Center, University of Missouri, Columbia, MO, 65212, USA
- Department of Medical Pharmacology and Physiology, University of Missouri School of Medicine, Columbia, MO, 65212, USA
| | - Guanghong Jia
- Department of Medicine-Endocrinology and Metabolism, University of Missouri School of Medicine, Columbia, MO, 65212, USA
- Research Service, Harry S Truman Memorial Veterans Hospital, Research Service, 800 Hospital Dr, Columbia, MO, 65201, USA
- Dalton Cardiovascular Research Center, University of Missouri, Columbia, MO, 65212, USA
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