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高强度聚焦超声不完全消融对体外培养肝癌细胞的影响

, PP. 261-266

Keywords: 肝癌,残余癌,高强度聚焦超声,血管形成

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Abstract:

目的通过高强度聚焦超声不完全消融筛选残留肝癌细胞,探讨其生物学行为改变及对血管形成的影响。方法在声功率5W下,获得高强度聚焦超声辐照肝癌细胞的温度-时间关系,在某一温度下筛选出高强度聚焦超声不完全消融最佳肝癌细胞亚系并继续培养获得稳定子代。细胞活性实验检测细胞增殖率及热耐受性;划痕实验和Transwell小室侵袭实验检测迁移和侵袭能力;观察内皮细胞管腔形成的变化。结果随着高强度聚焦超声照射时间增加,温度增加,细胞死亡率增加,在48℃及以上温度肝癌SMMC7721细胞基本全部死亡,而47℃筛选出的SMMC7721肝癌细胞亚系增殖率、热耐受性较正常肝癌细胞增强(P<0.05),运动能力、侵袭能力无明显变化(P>0.05);并能促进内皮细胞增殖、迁移和管腔形成(P<0.05)。结论高强度聚焦超声能够杀灭肿瘤细胞,然而高强度聚焦超声不完全消融会促使肝癌细胞生物学行为转变并能促进血管形成。

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