Spondyloarthritis & psoriatic arthritis

Enhanced Type 1 Interferon Signature in Axial Spondyloarthritis Patients Unresponsive to Secukinumab Treatment

Arthritis RheumatolPublished Mechanistic study

Authors' conclusion

With treatment, SEC-NR patients have a more pronounced type 1 IFN signature than SEC-R patients, suggesting a mechanism contributing to this larger inflammatory burden.

Study context

Population
Patients with axial spondyloarthritis (axSpA), PBMC collected before and 24 weeks after secukinumab treatment
Participants
30 patients
Comparison
Secukinumab responders vs nonresponders
Outcome
Immune profiles (CD4+ subset frequency; gene expression of mature CD45RO+CD45RA-CD4+ T cells)
Follow-up
Before and 24 weeks after secukinumab
Methodological detailsflow cytometry, NanoString analysis
  • Flow cytometry
  • NanoString analysis

Main finding

As reported in the abstract

Immune profiles
SEC-NR had increased frequency of IL-17A-producing RORγt+CD4+ T cells vs healthy controls before secukinumab
P < 0.01
SEC-NR had significant increase of CXCR3+ CD4+ T cells before secukinumab vs secukinumab responders (SEC-R)
P < 0.01

Original publication

Enhanced Type 1 Interferon Signature in Axial Spondyloarthritis Patients Unresponsive to Secukinumab Treatment. Arthritis Rheumatol. Published 10 October 2024. doi:10.1002/art.42974

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