Chen X, Huang Q, Feng J, Xiao Z, Zhang X, Zhao L. GLP-1 alleviates NLRP3 inflammasome-dependent inflammation in perivascular adipose tissue by inhibiting the NF-κB signalling pathway.
J Int Med Res 2021;
49:300060521992981. [PMID:
33641439 PMCID:
PMC7917887 DOI:
10.1177/0300060521992981]
[Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/03/2023] Open
Abstract
Objectives
To study the effect of glucagon-like peptide 1 (GLP-1) on NLR family pyrin domain containing 3 (NLRP3) inflammasome-induced inflammation in perivascular adipose tissue (PVAT) of Zucker diabetic fatty (ZDF) rats and the underlying role of nuclear factor (NF)-κB signalling.
Methods
Thirty ZDF rats were randomly divided into three study groups: DM (0.9% saline, subcutaneously); DM+GLP-1 (liraglutide, s.c.); and NF-κB+GLP-1 (betulinic acid then liraglutide, s.c.). Ten Zucker lean rats were examined as normal controls. PVAT from ZDF (DM) rats was examined for inflammasome mRNA. Protein levels of NLRP3, cleaved caspase-1, caspase-1, gasdermin D (GSDMD), interleukin (IL)-1β and IL-18 in PVAT were compared between control, DM and DM+GLP-1 groups. Protein levels of NLRP3, IL-1β, IL-18 and NF-κB in PVAT were compared between control, DM, DM+GLP-1 and NF-κB+GLP-1 groups.
Results
The inflammasome most abundantly expressed in ZDF rat PVAT was NLRP3. NLRP3, cleaved caspase-1, IL-1β, IL-18, and GSDMD were markedly upregulated in DM versus control tissue, and GLP-1 reversed this effect. Inhibition of NLRP3 inflammasome-associated inflammation by GLP-1 was lost by activation of NF-κB with betulinic acid.
Conclusion
GLP-1 may alleviate NLRP3 inflammasome-dependent inflammation in PVAT by inhibiting NF-κB signalling.
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