• FOR46, an ADC targeting CD46, is in Phase 1 development with potential applications in mCRPC and other CD46-expressing cancers
  • Collaboration expands FibroGen’s clinical pipeline with potential first-in-class product candidate

SAN FRANCISCO, CA and LA JOLLA, CA, USA I May 08, 2023 I FibroGen, Inc. (Nasdaq: FGEN) and Fortis Therapeutics announced that FibroGen has entered into an exclusive license with Fortis Therapeutics for FOR46, a potential first-in-class Phase 1 antibody-drug conjugate (ADC) targeting a novel epitope on CD46. FOR46 is being developed for the treatment of metastatic castration-resistant prostate cancer (mCRPC) and is being explored for use in other CD46 expressing cancers. As part of the clinical development strategy, FibroGen will continue Fortis Therapeutics’ work to develop a PET-based biomarker utilizing a radiolabeled version of the targeting antibody (PET46) for patient selection.

“The agreement with Fortis Therapeutics bolsters FibroGen’s clinical pipeline in a capital-efficient manner, providing a product candidate with the potential to address a significant unmet medical need in oncology,” said Enrique Conterno, Chief Executive Officer, FibroGen. “FOR46 is a natural fit with our R&D capabilities and expertise. The flexibility of the agreement gives us the opportunity to clinically develop FOR46, and ultimately acquire it as a Phase 3-ready asset, potentially delivering a therapy that may transform the treatment of patients with mCRPC and other CD46 expressing cancers.”

“We are pleased to partner with the team at FibroGen, who are experienced in advancing novel drug candidates in the clinic for life-threatening diseases,” said Jay Lichter, Ph.D., President and CEO of Fortis and Managing Partner of Avalon Bioventures. “We believe that FOR46 is a novel and unique antibody drug conjugate therapy that could help patients with prostate cancer and other cancers, where currently approved treatments have failed.”

Under the terms of the agreement, there is no upfront consideration. FibroGen will conduct and fund future research, development, and manufacturing of FOR46 and PET46. During the four-year evaluation period, FibroGen has the option to acquire Fortis Therapeutics for $80 million. In addition, Fortis is eligible to receive up to a total of $200 million based on various regulatory approvals.

About FOR46

FOR46 is an antibody drug conjugate that binds a specific conformational epitope of CD46 that is highly expressed in various cancer types, including multiple myeloma and prostate and colorectal tumors, with limited reactivity against normal tissues. FOR46 is a fully human antibody conjugated to MMAE, a potent cytotoxic payload utilized in a variety of approved ADCs. Early clinical data show FOR46 to be generally well tolerated with demonstrated monotherapy activity in multiple myeloma and mCRPC.

About FibroGen
FibroGen, Inc. is a biopharmaceutical company committed to discovering, developing, and commercializing a pipeline of first-in-class therapeutics. The Company applies its pioneering expertise in connective tissue growth factor (CTGF) biology and hypoxia-inducible factor (HIF) to advance innovative medicines for the treatment of unmet needs. Pamrevlumab, an anti-CTGF human monoclonal antibody, is in clinical development for the treatment of idiopathic pulmonary fibrosis (IPF), locally advanced unresectable pancreatic cancer (LAPC), metastatic pancreatic cancer, and Duchenne muscular dystrophy (DMD). Roxadustat (爱瑞卓®, EVRENZO™) is currently approved in China, Europe, Japan, and numerous other countries for the treatment of anemia in CKD patients on dialysis and not on dialysis. Roxadustat is in clinical development for anemia of chronic kidney disease (CKD) and anemia associated with myelodysplastic syndromes (MDS), and for chemotherapy-induced anemia (CIA). FibroGen recently expanded its research and development portfolio to include product candidates in the immuno-oncology space. For more information, please visit www.fibrogen.com.

About Fortis Therapeutics

Fortis Therapeutics is an immuno-oncology biotech developing a novel antibody-drug conjugate for late-stage multiple myeloma and metastatic castration-resistant prostate cancer. Fortis was founded based on technology exclusively licensed from UCSF and developed in the laboratory of Bin Liu, Ph.D. Fortis is located in Avalon Bioventures’s Community of Innovation, in San Diego. FOR46 is Fortis’ sole pharmaceutical asset. For more information, please visit www.fortistx.com.

SOURCE: Fortis Therapeutics