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Single-Cell Transcriptomic Analysis Reveals an Inflammatory Antigen-Presenting Macrophages Subtype Drive Vitiligo
Ruozhou Qi1, Min Huang1, Ziyi Lin1
1Department of Dermatology, Dongzhimen Hospital, Beijing University of Chinese Medicine, Beijing, China, bucm.edu.cn.
Mediators of Inflammation
|January 7, 2026
Summary
This study identifies a new inflammatory macrophage subtype driving vitiligo by harming melanocytes and boosting T-cell responses. STAT1 inhibition shows promise for treating vitiligo by reducing this macrophage activity.
Area of Science:
- Immunology
- Dermatology
- Genomics
Background:
- Vitiligo is a depigmentation disorder involving melanocyte loss, with T-cells implicated but macrophage roles unclear.
- This research investigates macrophage heterogeneity and function in vitiligo pathogenesis.
Purpose of the Study:
- To characterize macrophage subpopulations and their functional roles in vitiligo.
- To identify key molecular regulators of these macrophages.
- To explore therapeutic strategies targeting macrophage dysfunction.
Main Methods:
- Single-cell RNA sequencing (scRNA-seq) of skin from healthy individuals and vitiligo patients.
- Computational analyses including clustering, pseudotime, cell-cell communication, and hdWGCNA.
- In vivo and in vitro experiments to assess STAT1 inhibition effects.
Main Results:
- Identified five macrophage subpopulations, with inflammatory antigen-presenting macrophages (Mac-InflamAP) enriched in vitiligo lesions.
- Mac-InflamAP, an M1-polarized terminal state, inhibits melanocytes and enhances T-cell activation via TNF signaling.
- STAT1 was identified as a key regulator in Mac-InflamAP; its inhibition ameliorated vitiligo progression and reduced M1 polarization and antigen presentation.
Conclusions:
- Revealed a novel inflammatory macrophage subpopulation driving vitiligo through direct melanocyte inhibition and T-cell activation.
- Identified STAT1 as a critical regulator, presenting a potential therapeutic target for vitiligo.
- Advanced understanding of the immune mechanisms underlying vitiligo pathogenesis.
