NLRC5 deficiency promotes myocardial damage induced by high fat diet in mice through activating TLR4/NF-κB
| Autor: | Shu-Ren Ma, Xiong-Wei Xie |
|---|---|
| Rok vydání: | 2017 |
| Předmět: |
Lipopolysaccharides
Male 0301 basic medicine medicine.medical_specialty Cardiac fibrosis Inflammation Diet High-Fat medicine.disease_cause 03 medical and health sciences 0302 clinical medicine Mice Inbred NOD Fibrosis Internal medicine medicine Animals Phosphorylation Mice Knockout Pharmacology Chemistry Myocardium Intracellular Signaling Peptides and Proteins NF-kappa B Cardiac muscle Feeding Behavior General Medicine medicine.disease Mice Inbred C57BL Toll-Like Receptor 4 Oxidative Stress IκBα 030104 developmental biology Endocrinology medicine.anatomical_structure 030220 oncology & carcinogenesis Immunology Knockout mouse TLR4 Cytokines Inflammation Mediators Insulin Resistance medicine.symptom Oxidative stress |
| Zdroj: | Biomedicine & Pharmacotherapy. 91:755-766 |
| ISSN: | 0753-3322 |
| DOI: | 10.1016/j.biopha.2017.03.062 |
| Popis: | The metabolic syndrome could be induced by high fat diet, leading to cardiovascular diseases, such as myocardial damage. Inflammation response and oxidative stress have been reported to be involved in high fat-induced heart injury, and the molecular mechanism is not fully understood. The NOD-like protein family member, NLRC5, could interact with IKKα to inhibit IKK complex activation. In our study, high fat diet-feeding mice showed cardiac fibrosis, inflammation and oxidative stress through collagen accumulation, TLR4/NF-κB and MAPKs signaling pathways activation. NLRC5 knockout mice fed with high fat showed accelerated fibrosis and inflammation response by promoting α-SMA, Collagen I, Collagen III, TLR4/MyD88, phosphorylated IKKα, IκBα and NF-κB expression. And no effect on oxidative stress was observed in wild type and NLRC5-deficiency samples in in vivo studies. Moreover, NLRC5-knockout and -knockdown cardiac muscle cells challenged with LPS also exhibited aggravated fibrosis levels and inflammatory response without any influences on ROS production in in vitro studies. In conclusion, the findings indicated that NLRC5 showed important effects on high fat-induced heart injury via fibrosis and inflammation modulation, providing an essential target for improving myocardial damage induced by high fat diet. |
| Databáze: | OpenAIRE |
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