Abstract
As the traditional conservative remedy for endometrial carcinoma (EC), progesterone has great limitations due to its poor performance, and a new strategy is urgently needed. Our previous work revealed that the antipsychotic drug chlorpromazine (CPZ) has stronger antitumor activity on EC than progesterone does, which may provide a promising conservative alternative for EC patients. Unfortunately, the severe extrapyramidal symptoms (EPSs) at concentrations (>5 mg/kg) that are required for anticarcinoma activity limited its repurposing. Therefore, a series of novel CPZ derivatives were designed and synthesized to avoid EPS and retain its antitumor activity. Among them, 11·2HCl and 18 displayed greater inhibitory activity by modulating SOS1. Notably, even at a dose of 100 mg/kg, 11·2HCl/18 had little effect on the extrapyramidal system. In conclusion, 11·2HCl and 18 greatly repressed the malignant features of endometrial carcinoma and decreased extrapyramidal side effects compared with the original drug CPZ.
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