Abstract

Iberdomide, a cereblon modulator, promotes degradation of transcription factors Ikaros and Aiolos. Evaluate iberdomide efficacy and safety in cutaneous lupus erythematosus (CLE) in a phase 2 study. Patients were randomized (2:2:1:2) to iberdomide 0.45 (n=81), 0.30 (n=82), or 0.15 mg (n=42) or placebo (n=83) daily while continuing background lupus medications. The mean (SD) baseline Cutaneous Lupus Area and Severity Index Activity (CLASI-A) score was 6.9 (7.0); 28% of patients had a score ≥8; 56% had acute CLE, 29% chronic CLE, and 16% subacute CLE. Mean CLASI-A improvement in patients with baseline score ≥8 was 39.7% for iberdomide 0.45 mg versus 20.1% for placebo at week 4 (P=0.032), with continued improvement through week 24 (66.7% vs 54.2%; P=0.295). Proportions of patients achieving ≥50% CLASI-A reduction from baseline at week 24 were significantly greater for iberdomide 0.45 mg versus placebo for patients with subacute (91.7% vs 52.9%, P=0.035) and chronic (62.1% vs 27.8%; P=0.029) CLE but not for the overall population (55.6% vs 44.6%) or patients with baseline CLASI-A ≥8 (66.7% vs 50.0%). Small patient subgroups of CLE subtypes. Iberdomide showed beneficial effects when added to background lupus medications in patients with subacute and chronic CLE.

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