Dissecting Hair Breakage in Alopecia Areata: The Central Role of Dysregulated Cysteine Homeostasis

May 2024 in “ Amino Acids ”

Wen Xu, Bo Xie, Dongfan Wei, Xiuzu Song

alopecia areata cysteine disulfide bond autophagy ferroptosis glutathione metallothionein keratin N-acetylcysteine oxidative stress stress-related hormones AA NAC

From the encyclopedia

Alopecia Areata →

autoimmune disorder causing patchy hair loss

Keratin →

Studysummary This review identifies cysteine's central role in hair growth and its potential impact on Alopecia Areata's pathogenesis, suggesting examination of cysteine metabolism might clarify the disease's underlying mechanisms and lead to new treatments. Our plain-language summary of this paper — not a Tressless recommendation.

This review article examines the role of dysregulated cysteine homeostasis in hair breakage associated with Alopecia Areata (AA). Cysteine is essential for hair shaft stability through disulfide bond formation, and disruptions in its metabolism can lead to hair fragility and breakage, early indicators of AA. The review suggests that aberrant cysteine metabolism may be linked to autophagy, ferroptosis, immunity, and psychiatric symptoms, offering potential therapeutic strategies. It also discusses cysteine's role in synthesizing antioxidants like glutathione and metallothionein, which protect against oxidative stress and support keratin production. The article proposes that interventions such as N-acetylcysteine supplementation could be beneficial. Additionally, it highlights that psychological symptoms in AA patients might be secondary complications, with stress-related hormones potentially playing a primary role in AA development. Further research is needed to validate these hypotheses and understand the pathophysiology of AA.

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