On July 21, 2021 Sorrento Therapeutics, Inc. (Nasdaq: SRNE, "Sorrento") reported its partner Escugen Biotechnology Co, Ltd. ("Escugen") and Sorrento’s subsidiary Levena (Suzhou) Biopharma Co., Ltd. ("Levena") have received an approval letter from the Center for Drug Evaluation (CDE) of the National Medical Products Administration (NMPA) for its Application for Clinical Trial (Acceptance No. CXSL2101069) of Recombinant Humanized Anti-Trop2 Mab-SN38 Conjugate (Press release, Sorrento Therapeutics, JUL 21, 2021, View Source [SID1234585070]).
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The TROP-2 ADC (ESG-401) was jointly developed by Shanghai-based Escugen and Levena, and the two companies jointly own the domestic and international patents for this ADC and share global rights for the product.
ESG-401 has potentially distinct differentiating advantages over its competitors in terms of safety, effectiveness and process robustness. Using an innovative, highly stable and cleavable linker, this ADC demonstrated in a series of preclinical studies that it releases very little free toxin during circulation, highly enriches in tumor tissues and rapidly endocytoses, thereby effectively killing tumor cells and inhibiting tumor growth. In the preclinical studies, ESG-401 demonstrated excellent safety, with no off-target or off-tumor toxicity observed in those high-dose, repetitively administered non-human primates. Additionally, ESG-401 showed significant antitumor activity in a variety of tumor models expressing TROP-2, with a low effective dosage and long inhibition time on tumor growth. ESG-401 potentially addresses a highly unmet need for the treatment of multiple solid tumors, including triple-negative breast cancer and urothelial carcinoma.
Sorrento intends to file a US IND for this ESG-401 before the end of the year.