Targeting the toxic alpha-synuclein protein found in the brains of people with Parkinson’s is one of the most promising approaches to treat the disease in the clinic – but getting any drug into the brain is a challenge. Sanofi SA has joined with ABL Bio Inc. to solve this problem, in-licensing ABL-301, a preclinical bispecific antibody that locks on to misfolded alpha-synuclein but also includes a molecular “shuttle” that allows it to penetrate the blood-brain barrier.