目的：研究新多胺类似物四丁基丙二胺（TBP）对人早幼粒白血病细胞HL-60生长的影响及其作用机制。方法：MTT比色法分析TBP对HL-60细胞增殖的影响，流式细胞术检测TBP对HL-60细胞周期的影响，DNA片段化和线粒体膜电位分析用于检测细胞凋亡，化学发光法检测TBP对多胺降解代谢酶精胺氧化酶（SMO）和乙酰多胺氧化酶（APAO ）活性的影响。结果：TBP通过抑制细胞周期和诱导细胞凋亡显著抑制HL-60细胞增殖；随TBP药物浓度增高，HL-60细胞凋亡水平增加，SMO和APAO的活性亦显著增高。结论：新多胺类似物TBP能够通过诱导多胺降解代谢途径关键酶活性和诱导细胞凋亡而抑制 HL-60细胞增殖，具有抗白血病治疗的潜在应用前景。%Objective To investigate the effect of the new polyamine analogue tetrabutyl propanediamine (TBP) on cell proliferation and the underlying mechanism. Methods MTT assay was performed to determine cell proliferation. Flow cytometry was performed to detect cell cycle transition. DNA fragmentation and mitochondrial membrane potential determinations were performed to detect cell apoptosis. The activity of key enzymes in polyamine catabolism was detected by chemiluminescence assay. Results TBP could significantly inhibit the proliferation of HL-60 cells by blockingcell cycle transition and by inducing apoptosis. The TBP-induced apoptosis of HL-60 cells was in a dose-dependent manner. The enzyme activities of SMO and APAO were also significantly increased in HL-60 cells after treatment with 100 μM TBP for 24 hours. Conclusions TBP, as a new putrescine analogue, could inhibit proliferation of HL-60 cells by increasing the enzyme activity of SMO and APAO and inducing apoptosis.
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