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other·cardiology, immunology, preclinical research, biomedical research·PMC10190454

M2 Macrophage‐Derived sEV Regulate Pro‐Inflammatory CCR2 + Macrophage Subpopulations to Favor Post‐AMI Cardiac Repair

Advanced Science · 12 authors, 4 centres

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TL;DR

M2~EV~ were administered via intramyocardial injection.

Full summary

139 CHARS

M2~EV~ were administered via intramyocardial injection. The study suggests M2~EV~ could be a cell-free therapy for post-AMI cardiac repair.

STUDY TYPE

other

SPECIALTY

cardiology

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AI pipeline

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100% · A

ORIGINAL PAPER

PMC10190454

M2 Macrophage‐Derived sEV Regulate Pro‐Inflammatory CCR2 + Macrophage Subpopulations to Favor Post‐AMI Cardiac Repair

Advanced Science

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ABSTRACT

Abstract Tissue‐resident cardiac macrophage subsets mediate cardiac tissue inflammation and repair after acute myocardial infarction (AMI). CC chemokine receptor 2 (CCR2)‐expressing macrophages have phenotypical similarities to M1‐polarized macrophages, are pro‐inflammatory, and recruit CCR2 + circulating monocytes to infarcted myocardium. Small extracellular vesicles (sEV) from CCR2 – macrophages, which phenotypically resemble M2‐polarized macrophages, promote anti‐inflammatory activity and cardiac repair. Here, the authors harvested M2 macrophage‐derived sEV (M2 EV ) from M2‐polarized bone‐marrow‐derived macrophages for intramyocardial injection and recapitulation of sEV‐mediated anti‐inflammatory activity in ischemic‐reperfusion (I/R) injured hearts. Rats and pigs received sham surgery; I/R without treatment; or I/R with autologous M2 EV treatment. M2 EV rescued cardiac function and attenuated injury markers, infarct size, and scar size. M2 EV inhibited CCR2 + macrophage numbers, reduced monocyte‐derived CCR2 + macrophage recruitment to infarct sites, induced M1‐to‐M2 macrophage switching and promoted neovascularization. Analysis of M2 EV microRNA content revealed abundant miR‐181b‐5p, which regulated macrophage glucose uptake, glycolysis, and mitigated mitochondrial reactive oxygen species generation. Functional blockade of miR‐181b‐5p is detrimental to beneficial M2 EV actions and resulted in failure to inhibit CCR2 + macrophage numbers and infarct size. Taken together, this investigation showed that M2 EV rescued myocardial function, improved myocardial repair, and regulated CCR2 + macrophages via miR‐181b‐5p‐dependent mechanisms, indicating an option for cell‐free therapy for AMI.

CITATION EXPORT

Lan Li, Jiasong Cao, Sheng Li et al.. M2 Macrophage‐Derived sEV Regulate Pro‐Inflammatory CCR2+ Macrophage Subpopulations to Favor Post‐AMI Cardiac Repair. Advanced Science. (2023). https://doi.org/10.1002/advs.202202964

AUTHORS

12 · 4 CENTRES

Lan Li, Jiasong Cao, Sheng Li, Tianyi Cui, Jingyu Ni, Han Zhang, Yan Zhu, Jingyuan Mao, Xiumei Gao, Adam C. Midgley, Meifeng Zhu, Guanwei Fan

1 State Key Laboratory of Modern Chinese Medicine Key Laboratory of Pharmacology of Traditional Chinese Medical Formulae for the Ministry of Education Tianjin University of Traditional Chinese Medicine Tianjin 301617 China
2 National Clinical Research Center for Chinese Medicine Acupuncture and Moxibustion State Key Laboratory of Component‐based Chinese Medicine First Teaching Hospital of Tianjin University of Traditional Chinese Medicine Tianjin 300193 China
3 Tianjin Key Laboratory of Human Development and Reproductive Regulation Tianjin Central Hospital of Gynecology Obstetrics Tianjin 300052 China
4 Key Laboratory of Bioactive Materials for the Ministry of Education College of Life Sciences Nankai University Tianjin 300071 China