TNF-alpha inhibitors work as well in juveniles with SpA as in adults, giving good long-term results, according to a small observational study conducted in 3 countries.
Hugle B, Burgos-Vargas R, Inman RD, et al., Long-term outcome of anti-tumor necrosis factor alpha blockade in the treatment of juvenile spondyloarthritis.Clin Exp Rheumatol. 2014 Jan 3. [Epub ahead of print]
A small observational study conducted in Canada, Germany, and Spain suggests that anti-tumor necrosis factor-alpha (TNF-Î±) drugs are just as safe and effective long-term in juvenile spondyloarthritis (JSpA) as they are in adults.
The open-label study of 16 patients with JSpA and related disorders refractory to non-steroidal anti-inflammatory drugs (NSAIDs) and to methotrexate (MTX) found that the majority reached clinical remission within 6 months with TNF-Î± inhibitors -- and maintained low disease activity in joints for up to 7 years.
The only exceptions were patients with hip disease, two of whom required hip replacements at 3 and 8 years, respectively.
Conventional JSpA treatments, NSAIDs and corticosteroids, relieve symptoms but have little effect on long-term damage. And while anti-TNF-Î± drugs are safe and effective in adult-onset SpA, there are no long-term data in children with enthesitis-related arthritis (ERA).
The study group, mostly teenage boys, took etanercept (n=10) or infliximab (n=6) and were observed for a median of 7.2 years.
As early as 6 weeks after beginning this treatment, patients showed significant improvement -- a median of 0 total active joint counts (TAJCs) and tender entheseal counts (TECs). By 6 months, 83% met criteria for clinical remission (both a TAC and TEC of 0 at any time period), an effect that was sustained over follow-up. Ten patients followed in a prior short-term trial had similar results.
The authors say that radiographic evidence suggests TNF-Î± drugs are less effective in controlling sacroiliac joint disease.
In the study group, 6 patients (38%) had an arthritic flare at around two years. Two patients had mild temporary drug reactions, but there were no other adverse events.