Treatment with clazakizumab was well tolerated and effective at treating musculoskeletal stress in patients with psoriatic arthritis (PsA), Dr. Philip Mease and his associates reported in a phase IIB study published in Arthritis & Rheumatology.
After 16 weeks, American College of Rheumatology (ACR) 20 response rates were highest in the group that received 100-mg doses of clazakizumab at 52.4%, compared with 46.3% for the 25-mg group, 39% for the 200-mg group, and 29.3% for the placebo group. ACR 50/ACR 70 response rates were higher for clazakizumab than for placebo after 16 weeks and 24 weeks, without clear evidence of a dose response.
Dr. Philip Mease
Adverse events were more common for patients taking clazakizumab and occurred most frequently in the 200-mg group. However, serious adverse events were no more common in the 25-mg and 100-mg groups, compared with the placebo group. Discontinuations due to adverse events were highest in the 200-mg group, and were similar in all other groups.
“Clazakizumab may be particularly suited for patients with PsA in whom skin disease is well controlled with topical agents, ultraviolet therapy, and/or oral systemic therapy such as MTX [methotrexate], but whose musculoskeletal manifestations, such as joint signs and symptoms, enthesitis, and dactylitis, require more potent systemic therapy. Furthermore, some PsA patients do not present with skin lesions at diagnosis; those patients may also benefit from clazakizumab treatment,” the investigators noted.
Find the full study in Arthritis & Rheumatology (doi: 10.1002/art.39700).