作者: Thomas H. Corbett , Chiab Panchapor , Lisa Polin , Nancy Lowichik , Susan Pugh
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摘要: A highly active and broadly thioxanthone has been identified: N-[[1-[[2-(Diethylamino)ethyl]amino]-7-methoxy-9-oxo-9H-thioxanthen-4-yl] methylformamide (SR271425, BCN326862, WIN71425). In preclinical testing against a variety of subcutaneously growing solid tumors, the following %T/C Log10 tumor cell kill (LK) values were obtained: Panc-03 T/C = 0, 5/5 cures; Colon-38 (adv. stage) 3/5 cures, 4.9 LK; Mam-16/C 3.5 Mam-17/0 2.8 Colon-26 1/5 3.2 Colon-51 T/C= 2.7 Panc-02 3.1 B16 Melanoma 13%, 4.0 Squamous Lung-LC12 14%, BG-1 human ovarian 16%, 1.3 WSU-Br1 breast 25%, 0.8 LK. The agent was modestly doxorubicin (Adr)-resistant tumors: Mam-17/Adr =23%, Mam-16/C/Adr 1.0 LK, but retained substantial activity taxol-resistant tumor: Mam-16/C/taxol 3%, 2.4 SR271425 IV implanted leukemias, L1210 6.3 LK AML1498 5.3 equally both by oral routes administration, although requiring approximately 30% higher dose route. Based on its antitumor profile, it may be appropriate to evaluate in clinical trials.