藏药柳茶提取物对K562肿瘤细胞生长的影响

目的:验证柳茶(Liucha)对肿瘤细胞体外生长的抑制作用,初步探讨其作用机制。方法:应用半固体琼脂培养法检测柳茶提取物对人白血病K562细胞集落形成能力的影响,用四甲基偶氮唑蓝(MTT)比色法观察柳茶提取物对肿瘤细胞代谢的影响,并在电镜下观察药物作用后肿瘤细胞形态学的变化。结果:与对照组相比,使用柳茶提取物后肿瘤细胞体外生长繁殖受到限制,表现为细胞软琼脂集落形成能力低下和MTT比色吸光度A值的降低。电镜下有细胞核周间隙变窄,染色质块状聚集浓染,线粒体肿大、嵴消失甚至呈空泡状等改变。结论:柳茶提取物具有抑制K562肿瘤细胞体外生长的潜能,作用机制可能与上述一系列形态学变化有关,这些变化可影响肿瘤细胞的代谢,从而限制其生长繁殖。

Effect of Liucha extract on tumor K562 cell growth

AIM: To investigate the effects of Liucha extract on the growth of tumor cells in vitro and its possible mechanism. METHODS: The capability of colony forming of human leukemia K562 cell in vitro and the cells metabolism were studied by semi-solid agar culture and MTT staining. Then , the changes in morphology in the tumor cells were examined using electronic microscope. RESULTS: Semi-solid agar culture and MTT colorimetric analysis showed that Liucha extrats could significantly inhibit the growth of the tumor cells and their capability of colony forming. Also,under the electronic microscope,it was found that the tumor K562 cell had a narrower perinuclear space,condensation of chromatin and an enlarged mitochondria , in which the cristase disappeared. CONCLUSION: The extract from Liucha possesses an inhibitory effect on K562 cell growth in vitro through affecting the metabolism of the tumor cells.