On December 24, 2022 Shanghai Junshi Biosciences Co., Ltd ("Junshi Biosciences", HKEX: 1877; SSE: 688180) and Coherus BioSciences, Inc. ("Coherus", Nasdaq: CHRS) reported that the companies have not received an action letter from the U.S. Food and Drug Administration (FDA, the Agency) regarding the Biologics License Application (BLA) for toripalimab in combination with chemotherapy as treatment for recurrent or metastatic nasopharyngeal carcinoma (NPC) by the Prescription Drug User Fee Action (PDUFA) date of December 23, 2022 (Press release, Coherus Biosciences, DEC 24, 2022, View Source [SID1234625599]).
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The FDA previously communicated that an on-site inspection of Junshi Biosciences’ manufacturing facility for toripalimab is required before the Agency can approve the application; however, they were unable to conduct the inspection during the current review cycle due to the ongoing impact of COVID-19 related restrictions on travel in China. The BLA for toripalimab remains under review, and Junshi Biosciences and Coherus are engaged in ongoing discussions with the Agency about the pre-approval inspection plans.
"There is a significant unmet need for those living with NPC, and toripalimab has demonstrated significant and clinically meaningful improvement as recognized by the FDA’s Breakthrough Therapy Designation. Both Coherus and the FDA are highly committed to bringing toripalimab to NPC patients in the U.S. as quickly as possible," said Theresa LaVallee, Ph.D., Coherus’ Chief Development Officer. "We are working closely and collaboratively with the FDA to schedule inspections of the manufacturing facility quickly and understand the need to ensure the safety of their inspectors. We continue to support the FDA as needed to allow for their assessment of toripalimab to be finalized."
"Although toripalimab’s BLA review process has been impacted by the COVID-19 pandemic, we believe the impact is temporary," said Dr. Sheng Yao, Senior Vice President of Junshi Biosciences. "Together with our partner Coherus, we are working with the FDA to expedite the facility inspection so it may be conducted safely as soon as possible in order to provide NPC patients with a treatment that has been demonstrated to be safe and effective. Our production operations are well prepared for the inspection."
The FDA has granted priority review for the toripalimab BLA for use in combination with gemcitabine and cisplatin as first-line treatment for patients with advanced recurrent or metastatic NPC and for toripalimab monotherapy for the second-line or later treatment of recurrent or metastatic NPC after platinum-containing chemotherapy. Recurrent or metastatic NPC is an aggressive head and neck tumor which has no FDA-approved treatment options.
About toripalimab
Toripalimab is an anti-PD-1 monoclonal antibody that blocks PD-L1 binding to the PD-1 receptor at a unique site that minimizes opportunities for the tumor cell to evade the immune system and decreases PD-1’s expression on the T-cell as a second method of restoring the body’s immune response.
The FDA granted Breakthrough Therapy designation for toripalimab in combination with chemotherapy for the first-line treatment of recurrent or metastatic NPC in 2021 as well as for toripalimab monotherapy in the second or third-line treatment of recurrent or metastatic NPC in 2020. Additionally, the FDA has granted Fast Track designation for toripalimab for the treatment of mucosal melanoma and Orphan Drug designations for the treatment of esophageal cancer, NPC, mucosal melanoma, soft tissue sarcoma, and small cell lung cancer ("SCLC").