Ixekizumab Tops Placebo in Axial Spondyloarthritis

Significant improvements for patients with prior inadequate response, intolerance to TNFi
Significant improvements for patients with prior inadequate response, intolerance to TNFi

HealthDay News — For patients with active radiographic axial spondyloarthritis (r-axSpA) and prior inadequate response or intolerance to 1 or 2 tumor necrosis factor inhibitors (TNFi), ixekizumab treatment results in significant improvements vs. placebo, according to a study published online October 20 in Arthritis & Rheumatology. The research was published to coincide with the annual meeting of the American College of Rheumatology, held from October 19 to 24 in Chicago.

Atul Deodhar, MD, from the Oregon Health & Science University in Portland, and colleagues recruited adults with inadequate response/intolerance to one or two TNFi, an established diagnosis of axSpA, and fulfillment of the Assessment of Spondyloarthritis International Society (ASAS) criteria for r-axSpA. They randomly assigned the patients to placebo (104 patients) or 80mg subcutaneous ixekizumab every 2 weeks (IXEQ2W) or 4 weeks (IXEQ4W; 98 and 114 patients, respectively). 

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The researchers found that compared with placebo, the proportion of IXEQ2W and IXEQ4W patients who achieved ASAS 40% response was significantly greater at week 16 (30.6 and 25.4%, respectively, vs 12.5%), with statistically significant differences seen as early as week 1 of treatment. Compared with placebo, there were statistically significant improvements in disease activity, function, quality of life, and spinal magnetic resonance imaging inflammation with 16 weeks of ixekizumab treatment. Treatment-emergent adverse events were more frequent with ixekizumab.

"These positive results provide support for ixekizumab as a potential treatment option for patients with ankylosing spondylitis, including those who have had an inadequate response to treatment with TNF inhibitors, a difficult-to-treat population," Deodhar said in a statement.

Several authors disclosed financial ties to pharmaceutical companies, including Eli Lilly, which manufactures ixekizumab and funded the study.

For more coverage of ACR/ARHP 2018, click here.

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