Aptevo Therapeutics Inc. has filed a provisional patent with the U.S. Patent and Trademark Office (USPTO) pertaining to an anti-PD-L1 x anti-CD40 bispecific antibody, APVO-711, with the potential to treat a range of solid malignancies such as head and neck squamous cell carcinoma, melanoma and carcinomas of the lung, gastrointestinal tract and colon.
Blincyto (blinatumomab, Amgen Inc.), the first FDA-approved bispecific antibody, gained regulatory approval in 2014, but the intervening years have been fairly bleak for bispecific antibodies as companies worked through technical challenges.
Aptevo Therapeutics Inc.’s chief scientific officer, Jane Gross, told BioWorld that the sale of the firm’s marketed recombinant hemophilia B therapeutic, Ixinity, to Medexus Pharmaceuticals Inc. allowed for a “cleaner message” to Wall Street. “It was a little difficult to explain having a commercial asset and an R&D pipeline,” she said.