Systemic JIA with and without macrophage activation syndrome
For systemic JIA without macrophage activation syndrome (MAS), the guidelines similarly advise against oral glucocorticoids as initial monotherapy while conditionally recommending NSAIDs for initial monotherapy. Where the guidelines differ most from those for oligoarticular and TMJ arthritis is in progression of DMARD use, with a strong recommendation against conventional synthetic DMARDs as an initial monotherapy and interleukin-1 and IL-6 inhibitors conditionally recommended for initial monotherapy.
For patients who don’t adequately respond to NSAIDs or glucocorticoids, IL-1 and IL-6 inhibitors are strongly recommended over a single or combination of conventional DMARDs. Residual arthritis or an incomplete response to IL-1 or IL-6 inhibitors should lead next to biologic or conventional DMARDs instead of long-term glucocorticoids.
For patients with MAS, the guidelines conditionally recommend IL-1 and IL-6 inhibitors over calcineurin inhibitor monotherapy to reach inactive disease and MAS resolution, with glucocorticoids conditionally recommended in initial treatment. Again, however, for patients with incomplete responses to IL-1 or IL-6 inhibitors or with residual arthritis, the guidelines advise biologic or conventional DMARDs over long-term glucocorticoids.
In patients with sJIA with or without a history of MAS who have inactive disease, practitioners should taper and discontinue glucocorticoids (a strong recommendation). A conditional recommendation for tapering and discontinuing biologic DMARDs follows attainment of inactive disease.
Beyond pharmacology
Although many of the nonpharmacologic recommendations did not have strong evidence based on assessment with Grading of Recommendations Assessment, Development, and Evaluation methodology, consensus was more often the case than not, Dr. Onel said, such as with vaccination.
“There was strong support for the use of immunizations in children with JIA and specific guidance for children with JIA receiving immunosuppression, not on immunosuppression, and children who are underimmunized or unimmunized,” she said. “Although the supportive evidence was very low as per GRADE, panel members were strongly in favor [of immunizations], given risk of infection for immunosuppressed children as well as the preponderance of evidence in similar disease states, such as IBD [inflammatory bowel disease].”
An area with less consensus was whether to check antibody titers for vaccine-preventable childhood infections before beginning immunosuppressive medication, but more panelists opposed the practice than supported it, Dr. Onel said.
“Some panelists felt that the information might be useful for risk management in case of an outbreak or exposure,” she said. “Most believed that screening a fully immunized child was of low benefit and might delay treatment and incur unnecessary cost.”
The process of developing the documents also reveals where the biggest gaps are in research.
“One of the things that we should strive for in the future is really to do more systematic studies so we have better quality of evidence going forward,” Dr. Shenoi said. Overall, however, the guidelines also reveal the progress made in treatment of JIA.
“We now know some of the key cytokines that are involved in the disease pathogenesis, and we have effective therapies for some of these pathways,” Dr. Shenoi said. “We used to use a lot more toxic medication for systemic JIA, and in past decades, these patients used to be on steroids forever. Now we have targeted therapies, and we have some patients who don’t ever need steroids because people are moving toward targeted therapies and having good results. That’s a huge step forward in the field.”
The research was funded by the ACR. Dr. Shenoi has been a consultant for Pfizer. Dr. Onel disclosed no relevant financial relationships.
A version of this article first appeared on Medscape.com.