Sanofi completes acquisition of DR-0201 Paris, May 27, 2025. Sanofi announces the completion of its acquisition of DR-0201, a targeted bispecific myeloid cell engager, from Dren Bio, Inc., a private clinical-stage biopharmaceutical company. The acquisition bolsters Sanofi’s ambition to become the foremost immunology company and broadens the company’s leading immunology pipeline. DR-0201, now named SAR448501, has shown robust B-cell depletion in pre-clinical and early clinical studies. The potential first-in ...