The mechanisms underlying the genetic association between HLA-B27 and ankylosing spondylitis, including the contribution of endoplasmic reticulum aminopeptidase 1 (ERAP1), continue to elude the field. New findings support the involvement of the unfolded protein response and highlight the therapeutic potential and limitations of targeting ERAP1 in this disease.
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Haroon, N., Inman, R.D. ERAP1 and the return of the UPR in ankylosing spondylitis. Nat Rev Rheumatol 19, 134–135 (2023). https://doi.org/10.1038/s41584-023-00910-y
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DOI: https://doi.org/10.1038/s41584-023-00910-y