高三尖杉酯碱对慢性粒细胞白血病患者骨髓CD34+CD7+细胞的影响

近年的研究表明，bcr—abl阳性的CD34^＋CD7^＋造血干细胞与慢性粒细胞白血病（CML）患者的白血病克隆的维持和疾病进展有关，是影响CML患者预后的独立危险因素，也是CML治疗的重要靶标之一。已有研究证实，单用高三尖杉酯碱（HHT）可使近30％的CML患者出现细胞遗传学效应，但HHT的作用机制仍有待进一步研究。我们观察了体内外HHT对CML患者骨髓CD34^＋CD7^＋细胞的影响，     

Effect of Homoharringtonine on Bone Morrow CD34^＋CD7^＋ Cells in Chronic Granulocytic Leukemia

Objective： To explore the effect of homoharringtonine （HHT） on bone morrow CD34^＋CD7^＋ cells in chronic granulocytic leukemia （CGL）. Methods： The changes of bone morrow CD34^＋CD7^＋ cells were observed after the treatment of HHT in 23 cases with CGL. The proliferation and apoptosis of CD34^＋CD7^＋ cells treated with HHT in vitro were studied. Results： The proportion of CD34^＋CD7^＋ cells in CGL （0.145±0.021） was higher than that of normal control （0.052±0.013）. The proportion of CD34^＋CD7^＋ cells in patients who got cytogenetic responses to HHT （0.072±0.020） decreased remarkably, but not in those patients who did not got cytogenetic responses to HHT, （0.137±0.023）. the proliferation of CD34^＋ cells was inhibited and the proportion of CD34^＋CD7^＋ cells decreased after cultured with HHT （0.134 in 24 h, 0.126 in 48 h and 0.102 in 72）. The apoptosis rate of CD34^＋CD7^＋ cells was higher than that in CD34^＋CDT cells （35.39%±4.39% versus 24.57%±4.01%, P〈0.05） 72 h after culture with HHT. Conclusion： The proportion of CD34^＋CD7^＋ cells in CGL was higher than that of normal control and HHT may inhibit the proliferation and induce apoptosis of bone marrow CD34^＋CD7^＋ cells.