Subcutaneous tocilizumab in the management of non-infectious uveitis in children: a brief report

Author:

Burlo FrancescaORCID,Tumminelli Cristina,Pastore SerenaORCID,Stocco Gabriele,Curci Debora,Lucafò Marianna,Tommasini Alberto,Taddio Andrea

Abstract

Abstract Background Tocilizumab is a humanized monoclonal antibody that acts as an IL-6 receptor antagonist. Intravenous tocilizumab is considered an option for children with anti-TNF refractory juvenile idiopathic arthritis-associated uveitis. In contrast, the potential of subcutaneous drug use with this indication is more controversial. Due to the decreased availability of intravenous tocilizumab during the COVID-19 pandemic, we started using the subcutaneous formulation of the drug in children with anti-TNF refractory uveitis. The study analyzes the serum concentration of tocilizumab and its clinical response in patients with anti-TNF refractory uveitis who started or switched to subcutaneous administration from intravenous use. Methods Five patients with non-infectious uveitis were treated with subcutaneous tocilizumab. Ocular inflammation was evaluated on slit lamp examination during clinical control. Serum tocilizumab concentrations were determined by ELISA. Results The mean blood concentration of tocilizumab was 61.4 µg/mL (range 2.7–137.0.), with higher values than levels recorded in adult patients with rheumatoid arthritis treated with intravenous tocilizumab. Three patients entered clinical remission. One patient developed a mild relapse and was treated with topical steroids. Only one patient did not respond to therapy. The medication was well tolerated without severe infection or other adverse events. Conclusion Our results support a possible role of subcutaneous tocilizumab in anti-TNF refractory uveitis.

Funder

Ministero della Salute

Publisher

Springer Science and Business Media LLC

Subject

Immunology and Allergy,Rheumatology,Pediatrics, Perinatology and Child Health

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