Environmental Modulation of JAK3-Mediated Immune Dysregulation in Alopecia Areata
November 2025
in “
Scholarly Commons (Embry–Riddle Aeronautical University)
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alopecia areata autoimmune disorder hair loss T-cell hair follicles Janus kinase 3 JAK3 urban air pollutants fine particulate matter diesel exhaust ozone oxidative stress epigenetic changes JAK3–STAT signaling immune cells heavy metals endocrine disruptors nutritional status gut microbiome cytokine balance autoimmune activation biomarkers AA immune system pollutants air pollution gut health immune response
TLDR Urban air pollution worsens hair loss in alopecia areata by increasing immune response.
Alopecia areata (AA) is an autoimmune disorder causing non-scarring hair loss due to T-cell–driven destruction of hair follicles, with Janus kinase 3 (JAK3) playing a central role in this process. The study highlights how environmental factors, particularly urban air pollutants like fine particulate matter, diesel exhaust, and ozone, modulate JAK3 expression and signaling, exacerbating the autoimmune response. These pollutants induce oxidative stress and epigenetic changes, enhancing JAK3–STAT signaling in immune cells around hair follicles. Additional factors such as heavy metals, endocrine disruptors, nutritional status, and gut microbiome imbalances further influence cytokine balance and autoimmune activation. The research synthesizes existing data to propose a model of JAK3 activation, identifying potential regulatory nodes and biomarkers relevant to AA risk and activity.
