Tarlatamab (AMG-757)
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Mechanism of action
From the NCI Drug Dictionary: A bispecific T-cell engager (BiTE) antibody composed of two single-chain variable fragments (scFv), one directed against the tumor-associated antigen (TAA) delta-like protein 3 (DLL3) fused to one that is directed against the CD3 antigen found on T lymphocytes, with potential immunostimulating and antineoplastic activities. Upon administration, tarlatamab binds to both the CD3 antigen on cytotoxic T lymphocytes (CTLs) and the DLL3 antigen found on DLL3-expressing tumor cells. This activates and redirects CTLs to DLL3-expressing tumor cells, which results in the CTL-mediated cell death of DLL3-expressing tumor cells.
Preliminary data
Small cell lung cancer
- DeLLphi-301: Ahn MJ, Cho BC, Felip E, Korantzis I, Ohashi K, Majem M, Juan-Vidal O, Handzhiev S, Izumi H, Lee JS, Dziadziuszko R, Wolf J, Blackhall F, Reck M, Bustamante Alvarez J, Hummel HD, Dingemans AC, Sands J, Akamatsu H, Owonikoko TK, Ramalingam SS, Borghaei H, Johnson ML, Huang S, Mukherjee S, Minocha M, Jiang T, Martinez P, Anderson ES, Paz-Ares L; DeLLphi-301 Investigators. Tarlatamab for Patients with Previously Treated Small-Cell Lung Cancer. N Engl J Med. 2023 Nov 30;389(22):2063-2075. Epub 2023 Oct 20. link to original article PubMed NCT05060016