Looking to shore up its spinal muscular atrophy (SMA) franchise, Biogen, Inc. has exercised an option with partner Ionis Pharmaceuticals, Inc. for its preclinical SMA candidate, BIIB115, as the patent expiration date for the firms’ Spinraza (nusinersen) looms in 2023.
The US firm paid Ionis $60m upfront in the fourth quarter of 2021 under their agreement for the asset which...








