Key clinical point: Serum levels of certain collagen degradation biomarkers were elevated in patients with psoriatic arthritis (PsA) vs. healthy controls (HC) and could be effectively lowered with guselkumab.
Major finding: Baseline serum concentrations of collagen degradation biomarkers C1M, C3M, C4M, and C6M were ≥1.25-times higher in patients with PsA vs. HC (adjusted P < .05). At week 24, 100 mg guselkumab every 4 weeks vs. placebo significantly reduced C1M, C3M, and C4M levels, whereas guselkumab 100 mg every 8 weeks vs. placebo significantly reduced C3M, C4M, and C6M levels (all adjusted P < .05), with improvements maintained up to week 52 (all adjusted P ≤ .0001).
Study details: Findings are from an exploratory analysis of the phase 3 DISCOVER 2 study that included 260 patients with active PsA and an inadequate response to standard and 76 HC.
Disclosures: This study was supported by Janssen Research & Development, LLC. Eight authors declared being employees of Janssen and owned stock in Johnson & Johnson, the parent company for Janssen. The other authors reported ties with several sources, including Janssen.
Source: Schett G et al. collagen turnover biomarkers associate with active psoriatic arthritis and decrease with guselkumab treatment in a phase 3 clinical trial (DISCOVER-2). Rheumatol Ther. 2022 (Mar 30). Doi: 10.1007/s40744-022-00444-x