AbstractA multitargeting prodrug (2) that releases gemcitabine, oxaliplatin, and doxorubicin in their active form in cancer cells is a potent cytotoxic agent with nM IC50s; it is highly selective to cancer cells with mean selectivity indices to human (136) and murine (320) cancer cells. It effectively induces release of DAMPs (CALR, ATP & HMGB1) in CT26 cells facilitating more efficient phagocytosis by J774 macrophages than the FDA drugs or their co‐administration. The viability of CT26 cells co‐cultured with J774 macrophages and treated with 2 was reduced by 32 % compared to the non‐treated cells, suggesting a synergistic antiproliferative effect between the chemical and immune reactions. 2 inhibited in vivo tumor growth in two murine models (LLC and CT26) better than the FDA drugs or their co‐administration with significantly lower body weight loss. Mice inoculated with CT26 cells treated with 2 showed slightly better tumor free survival than doxorubicin.
摘要 一种多靶点原药(2)能以其活性形式在癌细胞中释放吉西他滨、奥沙利铂和多柔比星,是一种有效的细胞毒药物,其 IC50 为 nM;它对癌细胞具有高度选择性,对人(136)和鼠(320)癌细胞具有平均选择性指数。它能有效诱导 CT26 细胞释放 DAMPs(CALR、ATP & 和 HMGB1),从而促进 J774 巨噬细胞更有效地吞噬细胞。与 J774 巨噬细胞共同培养的 CT26 细胞经 2 处理后,其存活率比未处理的细胞降低了 32%,这表明化学反应和免疫反应之间存在协同抗增殖效应。在两种小鼠模型(LLC 和 CT26)中,2 对体内肿瘤生长的抑制效果优于 FDA 药物或它们的联合用药,而且体重下降明显。用 2 处理过的 CT26 细胞接种小鼠的无瘤存活率略高于多柔比星。