壳寡糖(chitooligosaccharides,COS)分子量小,可溶性好,具有抗肿瘤等多种生物活性.以人肺腺癌A549细胞系为研究对象,探究COS对A549细胞线粒体膜电位、细胞生长与死亡的影响.MTT结果表明COS浓度越高,刺激时间越长,其对A549细胞生长的抑制作用越明显;流式细胞仪检测结果显示,1mg/mL的COS明显地降低了细胞线粒体膜电位水平;活死细胞荧光染色实验表明,COS组死亡细胞比率提高,与对照组相比具有显著性差异.结果提示,COS可能通过降低线粒体的膜电位而促进A549细胞凋亡.
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