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白癜风的临床特征、免疫发病机制与治疗策略。

Clinical Features, Immunopathogenesis, and Therapeutic Strategies in Vitiligo.

机构信息

Department of Dermatology, Xijing Hospital, Fourth Military Medical University, No. 127 of West Changle Road, Xi'an, Shaanxi, 710032, China.

出版信息

Clin Rev Allergy Immunol. 2021 Dec;61(3):299-323. doi: 10.1007/s12016-021-08868-z. Epub 2021 Jul 20.

Abstract

Vitiligo is an autoimmune disease of the skin characterized by epidermal melanocyte loss resulting in white patches, with an approximate prevalence of 0.5-2% worldwide. Several precipitating factors by chemical exposure and skin injury present commonly in patients with vitiligo. Although the diagnosis appears to be straightforward for the distinct clinical phenotype and specific histological features, vitiligo provides many challenges including chronicity, treatment resistance, frequent relapse, associated profound psychosocial effect, and negative impact on quality of life. Multiple mechanisms are involved in melanocyte disappearance, including genetics, environmental factors, and immune-mediated inflammation. Compelling evidence supports the melanocyte intrinsic abnormalities with poor adaptation to stressors leading to instability and release of danger signals, which will activate dendritic cells, natural killer cells, and innate lymphoid cells to initiate innate immunity, ultimately resulting in T-cell mediated adaptive immune response and melanocyte destruction. Importantly, the cross- talk between keratinocytes, melanocytes, and immune cells, such as interferon (IFN)-γ signaling pathway, builds inflammatory loops that give rise to the disease deterioration. Improved understanding of the immune pathogenesis of vitiligo has led to the development of new therapeutic options including Janus kinase (JAK) inhibitors targeting IFN-γ signaling pathways, which can effectively reverse depigmentation. Furthermore, definition of treatment goals and integration of comorbid diseases into vitiligo management have revolutionized the way vitiligo is treated. In this review, we highlight recent developments in vitiligo clinical aspects and immune pathogenesis. Our key objective is to raise awareness of the complexity of this disease, the potential of prospective therapy strategies, and the need for early and comprehensive management.

摘要

白癜风是一种皮肤自身免疫性疾病,其特征是表皮黑素细胞丧失,导致出现白色斑块,全球患病率约为 0.5-2%。许多化学暴露和皮肤损伤的诱发因素在白癜风患者中很常见。尽管根据明显的临床表型和特定的组织学特征,白癜风的诊断似乎很简单,但它也带来了许多挑战,包括慢性、治疗抵抗、频繁复发、相关的深刻心理社会影响以及对生活质量的负面影响。多种机制参与黑素细胞消失,包括遗传、环境因素和免疫介导的炎症。大量证据支持黑素细胞内在异常,对压力源适应不良导致不稳定和释放危险信号,这将激活树突状细胞、自然杀伤细胞和固有淋巴细胞,启动固有免疫,最终导致 T 细胞介导的适应性免疫反应和黑素细胞破坏。重要的是,角质形成细胞、黑素细胞和免疫细胞之间的相互作用,如干扰素(IFN)-γ信号通路,构建了炎症循环,导致疾病恶化。对白癜风免疫发病机制的深入了解导致了新的治疗选择的发展,包括针对 IFN-γ信号通路的 Janus 激酶(JAK)抑制剂,这些抑制剂可以有效地逆转色素减退。此外,定义治疗目标和将合并症纳入白癜风管理中,彻底改变了白癜风的治疗方式。在这篇综述中,我们强调了白癜风临床和免疫发病机制方面的最新进展。我们的主要目标是提高对这种疾病复杂性的认识、潜在的前瞻性治疗策略的潜力,以及早期和全面管理的必要性。

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