SAN FRANCISCO and SUZHOU, China, June 13, 2024 /PRNewswire/ -- Innovent Biologics, Inc. ("Innovent") (HKEX: 01801), a world-class biopharmaceutical company that develops, manufactures and commercializes high-quality medicines for the treatment of oncology, cardiovascular and metabolic, autoimmune, ophthalmology and other major diseases, announced that the U.S. Food and Drug Administration (FDA) has granted Fast Track Designation to its TOPO1i anti-CLDN18.2 ADC (R&D code: IBI343), for the treatment of advanced unresectable or metastatic pancreatic ductal adenocarcinoma (PDAC) that has relapsed and/or is refractory to one prior line of therapy. Previously, IBI343 has already received FDA approval of its IND application for the treatment of PDAC.

At the ASCO 2024 Annual Meeting, Innovent reported the preliminary Phase 1 results of IBI343 in advanced PDAC patients who have received at least one prior line of treatment. In the 6 mg/kg dose group, among the 10 evaluable PDAC patients with CLDN18.2 1/2/3+≥60%, the overall response rate (ORR) was 40%.

Dr. Hui Zhou, Senior Vice President of Innovent, said, "Pancreatic cancer is highly malignant and difficult to diagnose early. At present, the treatment of advanced pancreatic cancer is still based on systemic chemotherapy. The clinical options for the second-line treatment are particularly limited, with response rate of only 6%-16%, and median survival period of only about 3-6 months. There are urgent clinical needs to be met. As the world's first CLDN18.2 ADC to obtain FTD certification in this difficult-to-treat cancer, IBI343 single-agent therapy shows encouraging efficacy and tolerable safety in the late-line treatment of patients with advanced pancreatic cancer. We will continue to confirm its efficacy and safety in this disease in subsequent clinical trials, and also explore IBI343 in combination therapy and other solid tumors including gastric cancer."

Fast Track Designation (FTD) is a rapid review process designed to facilitate the clinical development of a drug that may treat serious conditions and fulfill an unmet medical need. According to regulations, drug candidates that obtain FTD qualifications will have more opportunities to communicate with the FDA during subsequent drug development and review processes, which will help speed up the clinical development and approval of the drug.

About Pancreatic Ductal Adenocarcinoma

Pancreatic cancer is one of the most malignant tumors of the digestive system, with a 5-year survival rate of about 10% [i]. In recent years, the incidence of pancreatic cancer has increased, but the early diagnosis rate is still low, seriously endangering human life and health. At present, the treatment of advanced pancreatic cancer is still based on systemic chemotherapy. Currently, the first-line treatment options mostly use fluorouracil (5-FU) or gemcitabine-based chemotherapy. In the second-line treatment, clinical options are very limited, mainly alternatives to the first-line regimen, and the median survival period is only about 3 to 4 months[ii], [iii]. Claudin, a member of the tight junction molecule family, is a key structural and functional component of epithelial tight junctions. Among them, CLDN18.2 is normally buried in the gastric mucosa, but the development of malignancy leads to disruption of tight junctions and exposure of CLDN18.2 epitopes on the membrane of tumor cells[iv]. CLDN18.2 is present in 50% to 70% of pancreatic cancer patients, making it a highly scrutinized target[v].

About IBI343 (Claudin18.2 ADC)

IBI343 is a recombinant human anti-Claudin 18.2 monoclonal antibody-drug conjugate (ADC) developed by Innovent Biologics. IBI343 binds to the Claudin 18.2-expressing tumor cells, which causes the Claudin 18.2-dependent ADC internalization to occur. Following lysosomal processing of the ADC, the active drug (TOP1i) is liberated, which results in DNA damage and eventually apoptosis of the tumor cells. The free drug can also diffuse through the plasma membrane and effectively eliminate neighboring cells, leading to a "bystander killing effect". As an innovative TOPO1i ADC, IBI343 has demonstrated tolerable safety and encouraging efficacy signals in Phase 1 clinical studies. The therapeutic potential of IBI343 is currently being explored in tumor types such as gastric cancer and pancreatic cancer.

In May 2024, The National Medical Products Administration (NMPA) of China granted breakthrough therapy designation (BTD) to IBI343 for use as a single agent in patients with claudin 18.2–positive gastric or gastroesophageal junction (GEJ) adenocarcinoma who experienced disease progression following 2 prior lines of systemic treatment. The multi-center Phase 3 trial of IBI343 for this indication is in preparation.

https://en.prnasia.com/releases/apac/innovent-receives-fast-track-designation-from-the-u-s-fda-for-ibi343-topo1i-anti-cldn18-2-adc-as-monotherapy-for-advanced-pancreatic-cancer-450574.shtml