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Interleukin 32 Exacerbates Vitiligo by Promoting Inflammation and Oxidative Stress-induced Injury in Melanocytes
Tianqi Wei1, Xin Huang1, Jing Zhu1
1Hospital for Skin Diseases, Institute of Dermatology, Chinese Academy of Medical Sciences & Peking Union Medical College, Nanjing, China.
Inflammation
|July 14, 2026
Summary
Interleukin 32 (IL32) exacerbates oxidative stress and inflammation in vitiligo by damaging melanocytes. Targeting IL32 may offer a new therapeutic strategy for vitiligo treatment.
Area of Science:
- Dermatology
- Immunology
- Cell Biology
Background:
- Vitiligo pathogenesis involves oxidative stress and inflammation, with cytokines playing a key role.
- Interleukin 32 (IL32) is a pro-inflammatory cytokine with enhanced expression observed in vitiligo lesions.
Purpose of the Study:
- To investigate the role of IL32 in oxidative stress-induced melanocyte inflammation in vitiligo.
- To explore IL32's contribution to vitiligo progression using cell and animal models.
Main Methods:
- Established knockdown and overexpression models in PIG melanocyte cell lines.
- Utilized transcriptomic analysis to identify IL32-mediated inflammatory pathways.
- Assessed IL32's effect on depigmentation in a mouse model of vitiligo.
Main Results:
- Oxidative stress increases IL32 production in melanocytes, worsening cellular injury.
- IL32 suppression activates the Nrf2 pathway, reducing oxidative stress.
- IL32 promotes secretion of inflammatory cytokines (e.g., CXCL9), potentially recruiting CD8+ T cells and accelerating depigmentation in mice.
Conclusions:
- IL32 is a key mediator of oxidative stress and inflammation in vitiligo.
- Targeting IL32 presents a promising therapeutic approach for vitiligo by reducing melanocyte damage and inflammation.
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