Lupus & antiphospholipid syndrome

Litifilimab reduces skin and joint disease in participants with SLE: additional results from Part A of the phase II LILAC study

Lupus Sci MedPublished Prespecified and exploratory analyses of LILAC Part A

Authors' conclusion

These findings characterise litifilimab’s effects on skin and joints and complement the LILAC Part A primary efficacy results, supporting the benefit of litifilimab for skin and joint manifestations in SLE.

Study context

Population
Adults with SLE from LILAC Part A with active skin and/or joint disease at baselinemodified intent-to-treat population subsets with active skin and/or joint disease at baseline
Participants
64 vs 56
Comparison
Litifilimab versus placebo
  • LITIFILIMAB 450 MGn = 64
  • PLACEBOn = 56
Methodological detailsphase II, modified intent-to-treat population subsets, placebo-controlled
  • Phase II
  • Modified intent-to-treat population subsets
  • Placebo-controlled

Primary result

As reported in the abstract

CLASI-50 and CLASI-70 responses (baseline CLASI-Activity (CLASI-A) score ≥8) · weeks 4, 8, 12, 16, 20 and 24
  • Greater proportions of participants achieved CLASI-50 and CLASI-70 responses with litifilimab than placebo

Further findings

Joint-50 response, total tender plus total swollen joints · week 24

Joint-50 response, total tender and/or swollen joints · week 24

Joint-50 response, total tender and swollen joints · week 24

Resolution of SLEDAI-2K rash · week 24

Resolution of SLEDAI-2K arthritis · week 24

Resolution of SLEDAI-2K rash and arthritis · week 24

Improvement of ≥1 grade in the BILAG-2004 mucocutaneous and musculoskeletal domains · week 24

Original publication

Litifilimab reduces skin and joint disease in participants with SLE: additional results from Part A of the phase II LILAC study. Lupus Sci Med. Published 2 November 2026. doi:10.1136/lupus-2026-002159

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