Sanofi gained an exclusive option on Vigil Neuroscience’s small-molecule TREM2 agonist programme for Alzheimer’s disease after making a $40-million investment in the biotech firm. “We view Sanofi’s investment in Vigil as a validation of our promising precision medicine approach,” remarked Vigil CEO Ivana Magovčević-Liebisch.Vigil’s lead TREM2 agonist, dubbed VG-3927, is currently being evaluated in a Phase I study, with interim data expected in mid-2024. “Recent discoveries have highlighted the role of microglial signalling and neuroinflammation in neurodegenerative diseases. TREM2 is a well credentialed microglia target in this context,” noted Erik Wallstroem, Sanofi's global head of neurology development.In connection with the equity investment – priced at $7.44 per share – Sanofi gained the exclusive right of first negotiation for a licence, grant or transfer of rights to research, develop, manufacture and commercialise Vigil’s small-molecule TREM2 agonist program, including VG-3927. Vigil indicated on Thursday that the proceeds will be used to fund its R&D activities, extending its cash runway into 2026. The biotech’s lead programme is luzanebart, a fully-human monoclonal antibody agonist targeting TREM2, which is currently in Phase II development for people with adult-onset leukoencephalopathy with axonal spheroids and pigmented glia.Vigil’s shares jumped more than 30% on the news.