The primary objective of the study is to evaluate the efficacy of subcutaneous zilucoplan in participants with AChR antibody positive gMG who experience severe exacerbations requiring hospitalization. A total of 15 patients will be enrolled in the study with treatment lasting 12 weeks. Dosing will be weight based.
Patients will be presented with the option of undergoing standard of care plasma exchange or IVIG or to participate in the research study to determine if the use of zilucoplan would rapidly alleviate the most severe symptoms of gMG (respiratory dysfunction and/or bulbar dysfunction). Assessments will include medical history, physical exam, vital signs and bloodwork. MG assessments will also be conducted including the QMG and MG-ADL and patient reported outcome measures like the Myasthenia Gravis Quality of Life 15 item Revised (MGQoL15r) scale. Treatment will start in the hospital and once the patient is discharged, treatment will continue as an outpatient. Current medications and adverse events will also be reviewed and documented. Patients who undergo treatment with zilucoplan will be vaccinated against meningitis prior to starting the study drug and will continue with the recommended set of vaccines for 6 months. Antibiotics will be taken concurrently until patients are fully vaccinated.
The study aims to find a less invasive method to treat MG patients who are experiencing an exacerbation. Utilization of a subcutaneous medication with relatively rapid onset of action may provide a viable alternative to the current therapeutic approaches. If rapid complement inhibition were to prove efficacious in the treatment of acute exacerbations of gMG, this therapy would potentially obviate the need for transfer to tertiary care centers, avoid the potentially hazardous placement of a large bore central venous catheter for plasmapheresis, and potentially reduce hospital length of stay.