Jin Z, Luo Y, Zhao H, Cui J, He W, Li J, Pi J, Qing L, Wu W.
Qingre Huoxue Decoction regulates macrophage polarisation to attenuate atherosclerosis through the inhibition of NF-κB signalling-mediated inflammation.
J Ethnopharmacol 2023;
301:115787. [PMID:
36206868 DOI:
10.1016/j.jep.2022.115787]
[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] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/19/2022] [Revised: 09/24/2022] [Accepted: 09/29/2022] [Indexed: 06/16/2023]
Abstract
ETHNOPHARMACOLOGICAL RELEVANCE
Atherosclerosis (AS) is a common pathogenesis of cardiovascular diseases. Qingre Huoxue Decoction (QRHX) is an herbal formula used for the prevention and treatment of AS. However, the potential mechanism of QRHX is not clear.
AIM OF THE STUDY
In our study, RNA sequencing combined with preclinical models were used to analyse the effect and mechanism of QRHX for the treatment of AS.
MATERIALS AND METHODS
For in vivo studies, ApoE-/- mice were fed with a high-fat diet to induce AS. We measured weight, blood lipid, inflammatory cytokines, lipid deposition, plaque, and the M1/M2 macrophage. For in vitro studies, RAW264.7 were induced by lipopolysaccharides and treated with different concentrations of QRHX. We focusd on the relationship between QRHX, the NF-κB pathway, and macrophage polarisation, and performed simultaneous RNA sequencing both in vivo and in vitro.
RESULTS
In vivo, QRHX decreased weight, improved blood lipid, relieved the degree of lipid deposition, reduced plaque area, decreased the levels of inflammatory cytokines (MCP-1, NLRP3, and TNFα), down-regulated the expression of iNOS, and up-regulated the expression of Arg-1. In vitro, QRHX down-regulated M1 markers, iNOS and CCR7, with lower concentrations of IL-1β; furthermore, QRHX up-regulated M2 markers, Arg-1, CD163, Ym-1, and Fizz-1, with higher concentrations of IL-4 and IL-10. RNA sequencing of both samples in vivo and in vitro suggested that NF-κB was the target pathway of QRHX to regulate macrophage polarisation; this result was validated at the gene and protein levels.
CONCLUSIONS
QRHX induced M2 polarisation, reduced an inflammatory response, and played a role in stabilising plaque by mediating the NF-κB signalling pathway.
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