Alopecia Areata Exhibits Cutaneous And Systemic OX40 Activation Across Atopic Backgrounds

    August 2024 in “ Allergy
    Madeline Kim, Ester Del Duca, Dante Dahabreh, Daniel Lozano‐Ojalvo, Britta Carroll, M.H. Manson, Swaroop Bose, Digpal Singh Gour, Monali NandyMazumdar, Ying Liu, Mitchelle L. Yu Ekey, Amira Chowdhury, Michael Angelov, Benjamin Ungar, Yeriel Estrada, Emma Guttman‐Yassky
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    TLDR Alopecia areata patients show increased inflammation and OX40 activation, suggesting a new treatment target.
    The study investigated the molecular and cellular characteristics of alopecia areata (AA) in patients with and without atopic history by analyzing scalp biopsies and blood samples from 36 AA patients and 17 healthy controls. The results showed significant upregulation of Th1 and Th2 inflammatory markers and downregulation of hair keratins in AA patients, regardless of atopic background. However, AA patients with atopy exhibited greater Th2-skewed inflammation. The study also found that the OX40/OX40L axis was upregulated in both the skin and blood of AA patients, suggesting it as a potential therapeutic target for AA treatment.
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