Data from the 15-HMedIdeS-09 study demonstrated that severe GBS patients treated with a single dose of imlifidase (0.25 mg/kg) plus intravenous immunoglobulin (IVIg) had rapid overall improvement in functional status including expedited recovery of muscle strength, fast return to independently walking, and a median time to independently walk (e.g., reaching Guillain-Barré Syndrome Disability Scale (GBS DS) 2 or less) by 16 days.

The indirect treatment comparison concluded that patients in the 15-HMedIdeS-09 study treated with imlifidase plus IVIg returned to independently walking 6 weeks sooner when compared to severe GBS patients in the IGOS real-world comparator group treated with IVIg. Additionally, patients in the 15-HMedIdeS-09 study experienced statistically significant improvement across several clinically meaningful measures at multiple time points as compared to the IGOS real-world comparator group including 6.4 times more likely at week 1, and 4.2 times more likely at week 4 to walk independently.  

“Our Phase 2 study results and the indirect treatment comparison with IGOS are critically important. Together they demonstrate the significant role imlifidase may play in future treatment options for GBS patients. Unlike other molecules, imlifidase can effectively and very rapidly remove IgG through enzymatic cleavage – halting the progression of nerve damage associated with GBS and stopping disease progression. The main goal of improved GBS treatments is to stop nerve damage early, reducing the time of hospitalization and support patients in regaining independence sooner. These findings underscore the role pathogenic IgG plays in severity and progression of GBS, and the clear potential of imlifidase to address unmet need in IgG-driven autoimmune diseases where faster acting treatment options are needed,” says Hitto Kaufmann, Chief R&D Officer, Hansa Biopharma.