Macrophage Polarization in Organ Transplantation: Advances in Understanding Its Effects on Graft Injury, Repair, and Fibrosis
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By
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Liping Wang
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Lijuan Wang
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Xu Chen
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Shaochen Yu
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July 17, 2026
Clinical Scorecard: Macrophage Polarization in Organ Transplantation: Advances in Understanding Its Effects on Graft Injury, Repair, and Fibrosis
At a Glance
| Category | Detail |
|---|
| Condition | Macrophage Polarization in Organ Transplantation |
| Key Mechanisms | Macrophages polarize into M1 (pro-inflammatory) and M2 (anti-inflammatory/reparative) phenotypes, influencing graft injury and repair. |
| Target Population | Patients undergoing organ transplantation. |
| Care Setting | Transplantation and immunology. |
Key Highlights
- Macrophages play critical roles in post-transplant immune response and tissue remodeling.
- M1 macrophages exacerbate tissue injury, while M2 macrophages are involved in repair and fibrosis.
- The JAK-STAT pathway is crucial in regulating macrophage polarization.
- Macrophage heterogeneity exceeds the traditional M1/M2 dichotomy.
- Therapeutic strategies may involve regulating macrophage polarization to improve graft outcomes.
Guideline-Based Recommendations
Diagnosis
- Assess macrophage polarization status to understand graft injury mechanisms.
Management
- Consider therapeutic strategies targeting macrophage polarization in transplant patients.
Monitoring & Follow-up
- Monitor for signs of acute rejection and chronic fibrosis related to macrophage activity.
Risks
- Sustained M2 activation may lead to excessive fibrosis.
Patient & Prescribing Data
Organ transplant recipients.
JAK inhibitors may offer dual anti-inflammatory and anti-fibrotic effects.
Clinical Best Practices
- Differentiate between donor-derived and recipient-derived macrophages in transplant settings.
- Utilize single-cell sequencing to explore macrophage heterogeneity.
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