塞来昔布诱导急性早幼粒细胞白血病细胞株MR2凋亡及机制的研究

目的:探讨塞来昔布诱导急性早幼粒细胞白血病细胞株MR2细胞凋亡作用及其可能机制。方法:应用MTT法分析塞来昔布对细胞增殖的影响;琼脂糖凝胶电泳进行DNA片段化分析;流式细胞仪检测细胞凋亡情况;PCR检测融合基因PML/RARα和凋亡相关基因Survivin表达;免疫印迹检测caspase-3、9和PARP蛋白表达。结果:MTT示塞来昔布对MR2细胞具有明显的增殖抑制作用,并具有时间和剂量依赖性。琼脂糖凝胶电泳见DNA片段化,形成典型梯状条带。流式细胞仪检测发现塞来昔布处理24 h后,随着作用浓度增加,MR2细胞早期凋亡率从5.06%增至36.1%,细胞内Survivin表达降低而PML/RARα无明显变化。同时伴有caspase-3、9和PARP蛋白的激活。结论:塞来昔布能够通过诱导凋亡抑制MR2细胞增殖,其机制可能与抑制Survivin表达有关,但与融合基因PML/RARα无明显关系。

三硫化二砷治疗急性早幼粒细胞白血病首例报告

Acute promyelocytic leukemia (APL) is a malignant and fatal disease. The authors report here for the first time in the world that a chemically synthesized diarsenic trisulfide (DATS, As 2S 3) used alone by mouth can have a remarkable effect in the treatment. The patient is reported to have attained not only hematological/clinical complete remission, but also cytogenetic and molecular biological remission after treatment. A male 47 year old patient with APL which was not treated before was given DATS by mouth from Nov.18, 1998. The dosage was 0.5 g tid. Promyelocytes in his bone marrow were decreased from 90% to normal range. Alongside, there was normalization of blood platelet count and hemoglobin value. He was discharged with hematological remission on Dec.31, 1998, and attained cytogenetic and molecular biological remission in March 1999. The side effect was minimal.

全反式维甲酸治疗急性早幼粒细胞白血病60例

目的：总结全反式维甲酸（ATRA）治疗急性早幼粒细胞白血病（APL）经验，探讨如何降低治疗中的早期死亡率。方法：选择60例确诊为APL的患者，采用ATRA治疗。结果：53例（883％）达完全缓解。29例（483％）出现白细胞增多症，9例出现高白细胞综合征，加用小剂量三尖杉酯碱、羟基脲或米托蒽醌，8例症状消失。6例出现维甲酸综合征，使用甲基强的松龙或地塞米松并用小剂量ATRA治疗后4例好转。结论：早期识别ATR毒副作用，尽早治疗，可以降低APL患者早期死亡率。