Inflammatory myopathies

Abatacept for the treatment of myositis-associated interstitial lung disease

Rheumatology (Oxford)Published Randomised controlled trial

Primary result · Change in %FVCResult — go to the resultBetween treatment difference −0.35 95% CI −6.91 to 6.21

Authors' conclusion

Abatacept did not significantly improve %FVC at 24 weeks.

Study context

Population
Participants with active ASyS-ILD
Participants
9 vs 11
Comparison
Abatacept vs placebo for 24 weeks, then open-label abatacept for all
  • Abataceptn = 9
  • Placebon = 11reference
Primary endpoint
Change in % predicted FVC (%FVC) from baseline
Follow-up
Week 24
Methodological detailsplacebo-controlled, pilot, 24-week open-label extension, not powered for primary or secondary endpoints, Analysed with a generalized linear mixed model
  • Placebo-controlled
  • Pilot
  • 24-week open-label extension
  • Not powered for primary or secondary endpoints
  • Analysed with a generalized linear mixed model

Primary result

Change in %FVC

Between treatment difference

−0.35

95% CI −6.91 to 6.21

P = 0.914

Abataceptvs Placebo
between treatment difference −0.35 (95% CI −6.91 to 6.21); P = 0.914

As reported in the abstract

Secondary outcomes

Secondary endpoints (FVC ml, %DLCO, shortness of breath questionnaire (SOBQ), pulmonary disease activity visual analogue scale (VAS)) · week 24

No significant difference in all secondary endpoints

%FVC, FVC (ml), %DLCO and SOBQ · week 48

Trends favouring abatacept, without statistical significance

Pulmonary disease activity VAS; pre-post baseline slopes of %FVC and quantitative image analysis (QIA) scores

Significant improvement in the abatacept arm

Original publication

Abatacept for the treatment of myositis-associated interstitial lung disease. Rheumatology (Oxford). Published 24 April 2025. doi:10.1093/rheumatology/keaf218

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