Liang X, Xiu C, Liu M, Lin C, Chen H, Bao R, Yang S, Yu J. Platelet-neutrophil interaction aggravates vascular inflammation and promotes the progression of atherosclerosis by activating the TLR4/NF-κB pathway.
J Cell Biochem 2018;
120:5612-5619. [PMID:
30302814 DOI:
10.1002/jcb.27844]
[Citation(s) in RCA: 24] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/31/2018] [Accepted: 09/14/2018] [Indexed: 01/09/2023]
Abstract
Platelet-neutrophil interaction is well known for its role in inflammatory diseases; however, its biological role in atherosclerosis (AS) progression remains unclear. Human peripheral blood neutrophils were obtained to compare toll-like receptor 4 (TLR4), tumor necrosis factor α (TNF-α), interleukin (IL)-1β and myeloid-related proteins 8/14 (Mrp8/14) levels in 22 AS patients with those in 18 healthy controls using quantitative real-time polymerase chain reaction (qRT-PCR) and enzyme-linked immunosorbent assay (ELISA). Meanwhile, mouse marrow neutrophils subjected to different treatment were collected for the ELISA assay, cell apoptosis, and Western blot analysis. Normal diet or high-fat diet ApoE-/- mice with or without administration of Mrp8/14 antagonist paquinimod were used for plasma collection to measure total cholesterol, triglycerides, low-density lipoprotein cholesterol and high-density lipoprotein cholesterol, TNF-α, IL-1β, Mrp8/14, TLR4, and nuclear factor (NF)-κB p65 levels. The results showed that Mrp8/14 and TLR4-mediated inflammatory pathway was activated in neutrophils of AS patients. In vitro experiments demonstrated that platelet-neutrophil interaction promoted the Mrp8/14 release and inhibited neutrophil apoptosis via P-selectin. Furthermore, platelet-neutrophil interaction upregulated TLR4/myeloid differentiation factor 88/NF-κB pathway. Conversely, Mrp8/14/TLR4/NF-κB interference alleviated AS progression. In conclusion, Mrp8/14/TLR4/NF-κB activated by platelet-neutrophil interaction is an important inflammatory signaling pathway for AS pathogenesis.
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