The covalent NLRP3-inflammasome inhibitor Oridonin relieves myocardial infarction induced myocardial fibrosis and cardiac remodeling in mice

2020 ◽  
pp. 107133
Author(s):  
Ri-Feng Gao ◽  
Xiao Li ◽  
Hai-Yan Xiang ◽  
Heng Yang ◽  
Chun-Yu Lv ◽  
...  
Keyword(s):  
Myocardial Infarction ◽  
Myocardial Fibrosis ◽  
Nlrp3 Inflammasome ◽  
Cardiac Remodeling

scholarly journals Qiliqiangxin Attenuates Adverse Cardiac Remodeling after Myocardial Infarction in Ovariectomized Mice via Activation of PPARγ

2017 ◽  
Vol 42 (3) ◽  
pp. 876-888 ◽  
Author(s):  
Shutong Shen ◽  
Huimin Jiang ◽  
Yihua Bei ◽  
Jialiang Zhang ◽  
Haifeng Zhang ◽  
...  
Keyword(s):  
Myocardial Infarction ◽  
Myocardial Fibrosis ◽  
Cardiac Remodeling ◽  
Heart Function ◽  
Quantitative Polymerase Chain Reaction ◽  
Mrna Level ◽  
Protective Effects ◽  
Female Mice ◽  
Ovariectomized Mice ◽  
Collagen Iii

Background/Aims: This study was designed to investigate the therapeutic effect of traditional Chinese medication Qiliqiangxin (QLQX) on adverse cardiac remodeling after myocardial infarction (MI) in bilateral ovariectomized (OVX) female mice. Methods: Eight-week old female C57BL/6 mice were operated to ligate the left anterior descending coronary artery seven days after bilateral ovariectomy and were orally administered either QLQX or vehicle. 21 days after ligation, echocardiography was performed to evaluate the heart function of all mice. Masson's Trichrome staining was applied to evaluate myocardial fibrosis. Collagen deposition was determined by the mRNA level of Collagen I, Collagen III and α-SMA using real-time quantitative polymerase chain reaction (qPCR). Myocardial apoptosis was examined by the protein level of Bax, Bcl2 and the Bcl2/Bax ratio using western blotting. Results: These mice displayed a significant reduction in heart function, increased myocardial fibrosis and apoptosis, and decreased expression of peroxisome proliferator activated receptor γ (PPARγ) in the heart tissue, which could be reversed by QLQX treatment. Inhibition of PPAR reduced QLQX-mediated cardio-protective effects, while PPARγ activation did not further enhance the beneficial effect of QLQX. Furthermore, QLQX upregulated 9 genes (Cd36, Fatp, Pdk4, Acadm, Acadl, Acadvl, Cpt1a, Cpt1b and Cpt2) facilitating energy metabolism in the MI hearts of the OVX mice and 5 (Acadm, Acadl, Cpt1a, Cpt1b, Cpt2) of the 9 genes were the downstream targets of PPARγ. Conclusion: The present study indicates that QLQX has a treatment effect on pathological remodeling post MI in bilateral OVX female mice via activation of PPARγ, suggesting that QLQX may be a promising prescription for the treatment of postmenopausal women suffering from MI.

scholarly journals Activation in M1 but not M2 Macrophages Contributes to Cardiac Remodeling after Myocardial Infarction in Rats: a Critical Role of the Calcium Sensing Receptor/NRLP3 Inflammasome

2015 ◽  
Vol 35 (6) ◽  
pp. 2483-2500 ◽  
Author(s):  
Wenxiu Liu ◽  
Xin Zhang ◽  
Meng Zhao ◽  
Xiaohui Zhang ◽  
Jinyu Chi ◽  
...  
Keyword(s):  
Myocardial Infarction ◽  
Western Blotting ◽  
Nlrp3 Inflammasome ◽  
Cardiac Remodeling ◽  
Cardiac Fibroblasts ◽  
Critical Role ◽  
Inflammasome Activation ◽  
Calcium Sensing Receptor ◽  
Calcium Sensing ◽  
Collagen Secretion

Aims: Macrophage (MΦ) infiltration during myocardial infarction (MI) amplifies cardiac inflammation and remodeling. We investigated whether activation of the NRLP3 inflammasome by a calcium sensing receptor (CaSR) in MΦ subsets contributes to cardiac remodeling following MI. Methods and Results: Infiltrated MΦ exhibited biphasic activation after MI; M1MΦ peaked at MI 3d and decreased until MI 14d, whereas M2MΦ peaked at MI 7d and decreased at MI 14d as shown via immunohistochemistry. IL-1β co-infiltrated with both M1MΦ and M2MΦ; IL-1β exhibited the same infiltrating tendency as M1MΦ, which was detected by immunohistochemistry. Increasing ventricular fibrosis was confirmed by Masson staining. CaSR and NLRP3 inflammasome in the MI group were upregulated in MΦ subsets in myocardium and peritoneal MΦ (p-MΦ) compared with the sham groups which were detected by immunofluorescence and western blotting. CaSR-activated NLRP3 inflammasome played a role in M1MΦ via PLC-IP3 but did not play a role in M2MΦ which were polarized by the THP-1 as shown by western blotting and intracellular calcium measurement. CaSR/NLRP3 inflammasome activation in M1MΦ led to the following effects: upregulated α-sma, MMP-2 and MMP-9, and collagen secretion; and downregulated TIMP-2 in cardiac fibroblasts via IL-1β-IL-1RI, which was detected by coculturing M1MΦ and cardiac fibroblasts. Conclusions: We suggest that the CaSR/NLRP3 inflammasome plays an essential role via the PLC-IP3 pathway in M1MΦ to promote cardiac remodeling post-MI in rats, including accelerated cardiac fibroblast phenotypic transversion, increased collagen and extracellular matrix (ECM) secretion; however, the CaSR/NLRP3 inflammasome does not play a role in this process in M2MΦ.

PHENOTYPIC HETEROGENEITY OF CARDIAC MACROPHAGES DURING WOUND HEALING FOLLOWING MYOCARDIAL INFARCTION: PERSPECTIVES IN CLINICAL RESEARCH

2018 ◽  
Vol 33 (2) ◽  
pp. 70-76 ◽  
Author(s):  
A. E. Gombozhapova ◽  
Yu. V. Rogovskaya ◽  
M. S. Rebenkova ◽  
J. G. Kzhyshkowska ◽  
V. V. Ryabov
Keyword(s):  
Myocardial Infarction ◽  
Wound Healing ◽  
Cardiac Remodeling ◽  
Phenotypic Heterogeneity ◽  
Macrophage Infiltration ◽  
Myocardial Regeneration ◽  
Control Group ◽  
M2 Macrophage ◽  
Inflammatory Phase ◽  
Regenerative Phase

Purpose. Myocardial regeneration is one of the most ambitious goals in prevention of adverse cardiac remodeling. Macrophages play a key role in transition from inflammatory to regenerative phase during wound healing following myocardial infarction (MI). We have accumulated data on macrophage properties ex vivo and in cell culture. However, there is no clear information about phenotypic heterogeneity of cardiac macrophages in patients with MI. The purpose of the project was to assess cardiac macrophage infiltration during wound healing following myocardial infarction in clinical settings taking into consideration experimental knowledge.Material and Methods. The study included 41 patients with fatal MI type 1. In addition to routine analysis, macrophages infiltration was assessed by immunohistochemistry. We used CD68 as a marker for the cells of the macrophage lineage, while CD163, CD206, and stabilin-1 were considered as M2 macrophage biomarkers. Nine patients who died from noncardiovascular causes comprised the control group.Results. The intensity of cardiac macrophage infiltration was higher during the regenerative phase than during the inflammatory phase. Results of immunohistochemical analysis demonstrated the presence of phenotypic heterogeneity of cardiac macrophages in patients with MI. We noticed that numbers of CD68+, CD163+, CD206+, and stabilin-1+ macrophages depended on MI phase.Conclusion. Our study supports prospects for implementation of macrophage phenotyping in clinic practice. Improved understanding of phenotypic heterogeneity might become the basis of a method to predict adverse cardiac remodeling and the first step in developing myocardial regeneration target therapy.

scholarly journals Myocardial fibrosis reversion via rhACE2-electrospun fibrous patch for ventricular remodeling prevention

2021 ◽  
Vol 6 (1) ◽  
Author(s):  
Zeping Qiu ◽  
Jingwen Zhao ◽  
Fanyi Huang ◽  
Luhan Bao ◽  
Yanjia Chen ◽  
...  
Keyword(s):  
Myocardial Infarction ◽  
Myocardial Fibrosis ◽  
Ventricular Remodeling ◽  
Cardiac Fibroblasts ◽  
Cost Effective ◽  
Intramyocardial Injection ◽  
Undesirable Consequence ◽  
Adverse Remodeling

AbstractMyocardial fibrosis and ventricular remodeling were the key pathology factors causing undesirable consequence after myocardial infarction. However, an efficient therapeutic method remains unclear, partly due to difficulty in continuously preventing neurohormonal overactivation and potential disadvantages of cell therapy for clinical practice. In this study, a rhACE2-electrospun fibrous patch with sustained releasing of rhACE2 to shape an induction transformation niche in situ was introduced, through micro-sol electrospinning technologies. A durable releasing pattern of rhACE2 encapsulated in hyaluronic acid (HA)—poly(L-lactic acid) (PLLA) core-shell structure was observed. By multiple in vitro studies, the rhACE2 patch demonstrated effectiveness in reducing cardiomyocytes apoptosis under hypoxia stress and inhibiting cardiac fibroblasts proliferation, which gave evidence for its in vivo efficacy. For striking mice myocardial infarction experiments, a successful prevention of adverse ventricular remodeling has been demonstrated, reflecting by improved ejection fraction, normal ventricle structure and less fibrosis. The rhACE2 patch niche showed clear superiority in long term function and structure preservation after ischemia compared with intramyocardial injection. Thus, the micro-sol electrospun rhACE2 fibrous patch niche was proved to be efficient, cost-effective and easy-to-use in preventing ventricular adverse remodeling.

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