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血管内皮细胞生长因子介导的免疫毒素抗胶质瘤的体外实验研究 被引量:1

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摘要 目的构建血管内皮细胞生长因子(VEGF)基因和铜绿假单胞菌外毒素衍生物(PE38)基因的真核融合表达载体,并研究其表达产物对U251细胞的影响。方法通过PCR获得本实验需要的VEGF165基因片段,通过酶切pRB391质粒获得铜绿假单胞菌外毒素衍生物PE38基因,再通过适当的酶切及连接反应,构建VEGF165与PE38融合基因的真核表达载体pIRES2-VEGF165-PE38-EGFP,经酶切及DNA测序证实构建成功后,用Lipofectamine2000脂质体转染293细胞,然后用RT-PCR及Elisa法检测VEGF165-PE38融合蛋白在293细胞的表达,并利用转染细胞后的培养上清体外测定VEGF165-PE38融合蛋白对U251的选择性细胞毒作用。结果酶切分析及DNA测序证实,VEGF165-PE38融合基因被成功克隆入真核表达质粒载体pIRES2-EGFP,RT-PCR及Elisa法检测证实重组基因可在293细胞表达。细胞转染上清对U251具有较强的细胞抑制效应。结论VEGF165-PE38融合基因构建,表达及其功能的初步研究,为进一步研究其对胶质瘤的靶向毒性及临床应用奠定基础。
出处 《中国神经精神疾病杂志》 CAS CSCD 北大核心 2009年第3期168-171,共4页 Chinese Journal of Nervous and Mental Diseases
基金 国家自然科学基金资助项目(编号:30500526) 广东省自然科学基金资助项目:(编号:06024442) 广东省科技计划项目:(编号:2008B030301152)
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