Johnson & Johnson highlights new data that showcase the strength of nipocalimab, demonstrating long-term sustained disease control in adults living with generalized myasthenia gravis (gMG)

Core Insights - Johnson & Johnson announced positive results from the Phase 3 Vivacity-MG3 study and its open-label extension, demonstrating long-term efficacy and safety of nipocalimab in treating generalized myasthenia gravis (gMG) [1][2][5] Efficacy and Safety - Nipocalimab showed sustained reductions in immunoglobulin G (IgG) antibodies and improvements in gMG symptoms over 84 weeks, with follow-up data extending to 128 weeks confirming a consistent safety profile [1][4] - Patients receiving nipocalimab plus standard of care (SOC) achieved a mean change in MG-ADL score of -5.64 (p<0.001) after 60 weeks, indicating significant symptom improvement [2][5] - The treatment group had four times greater odds of improving muscle strength and function compared to the placebo group, with a statistically significant QMG score improvement of -4.9 (p<0.001) [1][2] Patient Outcomes - 45% of patients on steroids at the open-label extension baseline were able to reduce or discontinue steroid use, with the mean prednisone dose decreasing from 23 mg to 10 mg per day [2][4] - A significant proportion of patients (36.4%) in the nipocalimab group demonstrated improvements in QMG scores for over 75% of the study duration compared to 10.5% in the placebo group [2][5] Disease Context - Generalized myasthenia gravis affects approximately 700,000 people globally, characterized by severe muscle weakness and difficulties in daily activities [4][5] - The disease primarily impacts young women and older men, with a notable prevalence in pediatric populations [4][5] Regulatory Designations - Nipocalimab has received multiple designations from the U.S. FDA, including Fast Track and Orphan Drug status for various conditions, highlighting its potential as a therapeutic option in the autoantibody disease space [6][8]