Session: PO.IM02.09 - Therapeutic Antibodies 1
Date:
Format: E-posters
Title: 2870/13-Dose selection investigations and combination strategies of NM21-1480, a PD-L1/4-1BB/HSA trispecific MATCH3 therapeutic clinical candidate
Presenter: Dr.
CS2006/NM21-1480 is a monovalent, tri-specific antibody-based molecule targeting PD-L1, 4-1BB, and human serum albumin (HSA). CS2006/NM21-1480 represents a leading class of broadly acting next-generation anti-PD-1/PD-L1 cancer immunotherapies and a new backbone molecule for tumor-specific combination therapies. CS2006/NM21-1480 is designed to bind to the immune co-stimulatory receptor 4-1BB and conditionally activate T cells only when engaging and blocking the checkpoint receptor ligand PD-L1 on the surface of tumor cells, potentially preventing the liver toxicities observed with previous anti-4-1BB agonistic antibodies.
Compared to other PD-L1/4-1BB bispecific antibody candidates, CS2006/NM21-1480's unique monovalent structure and ultra-high-affinity PD-L1-binding are designed to tap the synergistic potential of tumor-localized modulation of PD-L1 and 4-1BB. Furthermore, half-life extension via the HSA-binding is designed to enable convenient dosing schedules for patients. CS2006/NM21-1480 is anticipated to be effective against tumors with a wide range of PD-L1 expression levels and may overcome primary and/or acquired resistance to anti-PD-1/PD-L1 therapies.
'The preclinical data of CS2006/NM21-1480 are encouraging and further demonstrate its potential to become a best-in-class anti-4-1BB agonist and next-generation immune checkpoint inhibitor. The bell-shape dose-response curve associated with this class of agents presents a unique challenge with dose-selection in the clinic. However, this concern seems to be alleviated by the fine affinity balance engineered in CS2006/NM21-1480 which allows optimal PD-L1 blockade and 4-1BB activation at the same time.' Dr.
CS2006/NM21-1480 was discovered and engineered by Numab Therapeutics ('Numab'), CStone's partner, using its proprietary ?cap technology and MATCH platform. CStone and Numab signed an exclusive regional licensing agreement for the development and commercialization of the drug candidate. Pursuant to the terms of the licensing agreement, CStone will fund the research and development of CS2006/NM21-1480 up to completion of an initial Phase 1b clinical trial. In exchange, CStone obtains exclusive rights from Numab to develop and commercialize CS2006/NM21-1480 in
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