Glucocorticoid sparing effect of Janus Kinase inhibitors compared to biological Disease Modifying Anti-Rheumatic Drugs in rheumatoid arthritis, a single-center retrospective analysis

Background: Glucocorticoid sparing in rheumatoid arthritis (RA) treatment is crucial to minimizing adverse effects associated with long-term use. Janus kinase inhibitors (JAKi) could potentially offer a more potent glucocorticoid-sparing effect than biological Disease-Modifying Antirheumatic Drugs (bDMARDs).

Material and methods: This is a single-center retrospective analysis of RA patients treated with JAKi or bDMARDs. Glucocorticoid tapering, rescue therapy and discontinuation were analyzed through mixed-effects models, Poisson regression, and multivariable logistic regression, respectively, adjusting for baseline disease activity, demographic factors, and treatment line.

Results: A total of 716 RA patients treated with JAKi (n = 156) or bDMARDs (n = 560) were evaluated. JAKi treatment was associated with a more rapid reduction in glucocorticoid dose within the first 6 months and 60% higher odds of discontinuation compared with bDMARDs (adjusted odds ratio 1.63, 95% CI 1.02-2.60, p 0.039). Despite a higher baseline glucocorticoid dose, over 50% of JAKi-treated patients discontinued glucocorticoids after 12 months, vs ∼40% for bDMARDs. The need for glucocorticoid rescue therapy was significantly higher in the bDMARD group (rate ratio 2.66 (95% CI, 1.88-3.74)).

Conclusion: Our findings indicate that JAK inhibitors facilitate more rapid glucocorticoid tapering compared with bDMARDs in RA patients. These results underscore the potential of JAK inhibitors to reduce long-term glucocorticoid exposure, highlighting their value in RA management strategies, including minimizing glucocorticoid-related adverse effects.