Abstract | OBJECTIVE: This study aimed to investigate whether the NLRP3 inflammasome in Kupffer cells (KCs) can be activated in response to high glucose (HG) and to evaluate its influence on hepatic insulin sensitivity. METHODS: RESULTS: Hepatocytes cocultured with KCs showed enhanced lipid accumulation, glucose output, and impaired insulin sensitivity when exposed to HG. Enhanced NLRP3 inflammasome activation was also evident in both hepatocytes and KCs. Moreover, KCs that were pretreated with caspase-1 inhibitor, NLRP3 inhibitor, and NLRP3 small interfering RNA corrected coculture-induced aberrances in insulin action and NLRP3 inflammasome activation in hepatocytes. KC coculture also increased interleukin-1β (IL-1β)-mediated nuclear factor-κB (NF-κB) activation in hepatocytes. In hyperglycemic mice, KC depletion inhibited NLRP3 inflammasome activation and improved hepatic insulin sensitivity. CONCLUSIONS:
|
Authors | Tao Zheng, Qibin Wang, Yongcheng Dong, Weidong Ma, Yonghong Zhang, Yan Zhao, Fang Bian, Li Chen |
Journal | Obesity (Silver Spring, Md.)
(Obesity (Silver Spring))
Vol. 28
Issue 7
Pg. 1270-1282
(07 2020)
ISSN: 1930-739X [Electronic] United States |
PMID | 32538511
(Publication Type: Journal Article, Research Support, Non-U.S. Gov't)
|
Copyright | © 2020 The Obesity Society. |
Chemical References |
- Inflammasomes
- NLR Family, Pyrin Domain-Containing 3 Protein
- Nlrp3 protein, mouse
- Glucose
|
Topics |
- Animals
- Cells, Cultured
- Dose-Response Relationship, Drug
- Glucose
(pharmacology)
- Inflammasomes
(drug effects, metabolism, physiology)
- Insulin Resistance
(genetics)
- Kupffer Cells
(drug effects, immunology, metabolism)
- Liver
(drug effects, metabolism)
- Male
- Mice
- Mice, Inbred C57BL
- Mice, Transgenic
- NLR Family, Pyrin Domain-Containing 3 Protein
(genetics, metabolism)
|