系统性光动力疗法对急性髓细胞性白血病大鼠的疗效评价

Therapeutic evaluation of systemic photodynamic therapy in a rat model for acute myeloid leukemia

目的 研究系统性光动力疗法（SPDT）对髓细胞性白血病（BNML）大鼠的治疗效果.方法 尾静脉注射绿色荧光蛋白（GFP）-LT12细胞构建BNML大鼠模型.早期SPDT组、中期SPDT组和晚期SPDT组,分别于GFP-LT12注射后第5、10和15天进行SPDT;阴性对照组注射后常规饲养;阿糖胞苷（Ara-c）阳性对照组在注射后第7天经腹腔注射Ara-c.采用荧光成像系统追踪体内的GFP-LT12细胞,流式细胞仪检测组织器官中GFP-LT12细胞的含量,milliplex大鼠细胞因子9试剂盒检测血清中IFN-γ、IL-1α、IL-1β、IL-2、IL-4、IL-6、IL-10和TNF-α的水平.结果 与阴性对照组相比,早期SPDT组、中期SPDT组和晚期SPDT组大鼠的存活时间均得到延长,其差异均具有统计学意义（均P＜0.05）;晚期SPDT组大鼠髓和肝脏中GFP-LT12细胞的比率均有所下降;晚期SPDT组大鼠血清中IL-1β、IL-10、TNF-α和IFN-γ的表达水平明显降低,其差异均具有统计学意义（均P＜0.05）.结论 SPDT是一种有效的治疗白血病的方法,抗肿瘤免疫效应可能在此过程中起关键作用.

Objective To evaluate the efficacy of the systemic photodynamic therapy （SPDT）for treating leukemia using a Brown Norway myeloid leukemia （BNML） rat model.Methods The BNML rat model was established by injecting green fluorescent protein （GFP）-LT12 cells into the tail vein.After GFP-LT12 injection,the early-SPDT group,mid-SPDT group and late-SPDT group were treated with SPDT at 5,10 and 15 days,the negative control group was fed as usually,and the Ara-c positive control group was treated with Ara-c at 7 days.The GFP-LT12 cells were traced by a fluorescence imaging system.The GFP-LT12 cells in the tissues and organs were detected by flow cytometry.The levels of IFN-γ,IL-1α,IL-1β,IL-2,IL-4,IL-6,IL-10 and TNF-α in serum were detected by milliplex rat cytokine 9 kits.Results Compared with the negative control group,the survival times of the rats in the earlySPDT group,mid-SPDT group and the late-SPDT group were prolonged （all P〈0.05）.The ratios of GFP-LT12 cells in pulp and liver were decreased in the late-SPDT group.The levels of IL-1β,IL-10,TNF-α and IFN-γin serum of the late-SPDT group were decreased （all P〈0.05）.Conclusion The SPDT is an effective method for the treatment of leukemia,and the anti-tumor immune effect may play a key role in this process.