Posted on 5th June 2025

Vigil Neuroscience IGNITE Phase 2 trial discontinued

Vigil Neuroscience announced on 21st May that they will be acquired by Sanofi who have decided they will not be purchasing Iluzanebart (VGL101), Vigil’s monoclonal antibody being studied in a Phase 2 trial for adult-onset leukoencephalopathy with axonal spheroids and pigmented glia (ALSP).

Yesterday, Vigil announced an update on the IGNITE Phase 2 trial with Iluzanebart. After reviewing final data analysis, they determined there were no beneficial effects on biomarkers or clinical endpoints observed in CSF1R-ALSP patients treated with Iluzanebart. Unfortunately, they have decided that the Phase 2 IGNITE long-term extension study, and the ILLUMINATE Natural History Study will be discontinued.

Read message from Vigil Neuroscience

The Sisters’ Hope Foundation externally-led patient focused drug development (EL-PFDD) session will be held virtually on Friday 20th June 2025 at 6pm British Summer Time. They are calling on the ALSP community to come together to shine a light on the devastation caused by ALSP and the urgent need for a treatment and cure.

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