Journal
CLINICAL REVIEWS IN ALLERGY & IMMUNOLOGY
Volume 61, Issue 3, Pages 403-423Publisher
HUMANA PRESS INC
DOI: 10.1007/s12016-021-08883-0
Keywords
Alopecia areata; Etiopathogenesis; Diagnosis; Treatment; JAK inhibitor
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Funding
- National Natural Science Foundation of China [82073459, 81773311]
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Alopecia areata is a chronic autoimmune disease that results in hair loss, with complex pathogenesis and limited efficacy of available treatments. Recent research has led to the development of new treatment strategies, including JAK inhibitors, in addressing the condition.
Alopecia areata (AA) is a common chronic tissue-specific autoimmune disease, resulting in hair loss, that affects up to 2% of the general population. The exact pathobiology of AA has still remained elusive, while the common theory is the collapse of the immune privilege of the hair follicle caused by immunological mechanism. Multiple genetic and environment factors contribute to the pathogenesis of AA. There are several clinical treatments for AA, varying from one or multiple well-defined patches to more diffuse or total hair loss of the scalp (alopecia totalis) or hair loss of the entire body (alopecia universalis). The available treatments for AA, such as corticosteroids and other immunomodulators, minoxidil, and contact immunotherapy, are of limited efficacy with a high risk of adverse effects and high recurrence rates, especially for patients with severe AA. Recent insights into the pathogenesis of AA have led to the development of new treatment strategies, such as Janus kinase (JAK) inhibitors, biologics, and several small molecular agents. In addition, modern therapies for AA, including antihistamines, platelet-rich plasma (PRP) injection, and other novel therapies have been well explored. In this review, we discussed the recent advances in the pathogenesis, diagnosis, and treatment of AA.
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