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蓖麻毒素的纯化及其对血管内皮细胞增殖与凋亡的影响 被引量:1

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摘要 目的:对蓖麻毒素纯化方法进行改良并探讨其体外抗血管生成的药理作用。方法:通过磷酸盐缓冲液抽提、Sepharose 4B亲和层析与Sephacryl S-100分子筛层析纯化蓖麻毒素,反相疏水高效液相色谱法测定蛋白纯度,免疫印迹法进行鉴定;原代培养人脐静脉内皮细胞,免疫细胞化学法鉴定,MTT法检测蓖麻毒素对细胞增殖的抑制作用,流式细胞术定量分析细胞凋亡率。结果:采用改良法纯化蓖麻毒素明显缩短了纯化周期,纯化的蛋白经免疫印迹技术证实为蓖麻毒素,蛋白纯度高达95.3%;纯化的蓖麻毒素抑制体外培养人脐静脉内皮细胞增殖作用具有明显的时间及剂量依赖效应,并且可明显诱导细胞凋亡,随着药物浓度增加,细胞凋亡率,尤其是晚期凋亡率上升更明显。结论:采用改良方法纯化可获得高纯度的蓖麻毒素,纯化的蓖麻毒素具有明显的抑制血管内皮细胞增殖,诱导细胞凋亡作用。
出处 《中药材》 CAS CSCD 北大核心 2009年第5期750-753,共4页 Journal of Chinese Medicinal Materials
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