The US biotech is facing yet another setback on its journey to proof-of-concept for its proprietary gene editing technology as two pharma firms back out of collaborations in the neurological space.

Star will employ a hub-and-spoke model to launch portfolio companies focused on specific biological areas. The first company, Electra, will emphasize unmet medical needs and therapies that can address multiple diseases.

Licensing deals and partnerships carried the day during another hectic J.P. Morgan Healthcare Conference. Pfizer racked up its third deal of the week in a cancer collaboration with Dren Bio.

The deal bolsters Sanofi’s immuno-oncology pipeline and marks its sixth acquisition this year.