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Updated: May 29, 2026
Isolation of Macrophage Subsets and Stromal Cells from Human and Mouse Myocardial Specimens
Published on: December 17, 2019
Macrophages and the Survival of Cardiomyocytes After Myocardial Infarction
1Pediatric Translational Medicine Institute, Shanghai Children's Medical Center, Shanghai Jiao Tong University School of Medicine, China (M.Z.).
Insights
Macrophages play complex roles after myocardial infarction (MI), impacting cardiomyocyte survival and death. Understanding these diverse macrophage functions is key to developing targeted therapies for heart attack recovery.
Area of Science:
- Cardiology
- Immunology
- Cell Biology
Background:
- Myocardial infarction (MI) presents a significant global health challenge, leading to cardiomyocyte death.
- Post-MI, immune cells, particularly macrophages, infiltrate the injured heart tissue.
- Macrophages are traditionally known for clearing dead cells but exhibit complex, often contradictory, roles in cardiac repair.
Purpose of the Study:
- To review the diverse dynamics and functions of macrophages following myocardial infarction.
- To elucidate the roles of macrophages in cardiomyocyte survival and regulated cell death.
- To explore how single-cell technologies can identify specific macrophage subsets for therapeutic targeting.
Main Methods:
- Literature review focusing on macrophage biology in the context of myocardial infarction.
- Analysis of research on macrophage ontogeny, polarization, and functional states post-MI.
- Discussion of single-cell technologies for dissecting macrophage heterogeneity.
Main Results:
- Macrophages exhibit diverse functional states and ontogenies after MI, not a homogenous population.
- These macrophage populations play critical, yet often opposing, roles in cardiomyocyte survival and death.
- Specific macrophage clusters identified through single-cell analysis offer potential therapeutic targets.
Conclusions:
- Macrophages are key regulators of cardiac cell fate after MI, influencing both survival and death pathways.
- Targeting specific macrophage subsets holds promise for improving outcomes after myocardial infarction.
- Advanced technologies like single-cell sequencing are crucial for understanding macrophage complexity and developing precision medicine approaches.
Abstract:
Myocardial infarction (MI) causes a severe burden to public health worldwide. After MI, stressed cardiomyocytes undergo necrosis and regulated cell death. Dynamic cell cascades ensue to limit tissue injury and promote healing. MI and subsequent ischemic injury trigger the influx of innate immune cells. Macrophages, among the first responders of MI, are known mostly to coordinate the scavenging of dead cardiomyocytes. However, rather than occurring as a homogenous population, macrophages have diverse ontogenies and pathological functions, exhibiting contradictory roles in the survival and death of cardiomyocytes. This review focused on macrophages and discussed their diverse dynamics and functional patterns after MI. We shared the insight into the roles of macrophages in cardiomyocyte survival and regulated cell death. We explored the use of single-cell technology to discriminate specific macrophage clusters that can provide clues for the precise targeting of cardiomyocyte survival after MI.
