项目名称: 以氨基肽酶N为靶的新型抗肿瘤胶束的构建及作用机制
项目编号: No.30873170
项目类型: 面上项目
立项/批准年度: 2009
项目学科: 轻工业、手工业
项目作者: 张烜
作者单位: 北京大学
项目金额: 28万元
中文摘要: 传统抗肿瘤药物因靶点分布低存在疗效差和副作用大的缺点,故靶向给药十分重要。研究表明肿瘤新生血管是肿瘤治疗中非常重要的靶标,氨基肽酶N(CD13)是肿瘤新生血管及肿瘤细胞的新靶点,它对肿瘤的发生、发展和转移具有非常重要的作用。紫杉醇除杀灭肿瘤细胞外,其抗肿瘤血管生成的新作用已得到证实。本课题选择肿瘤血管及肿瘤细胞高表达的CD13为靶标、其配体NGR(Asn-Gly-Arg)寡肽片段为靶头、具有抗肿瘤血管生成及抗肿瘤细胞双重作用的紫杉醇为模型、构建靶向肿瘤血管及肿瘤细胞的新型NGR-PEG-DSPE胶束给药系统,并对其作用机制进行深入研究。本课题采用跨学科研究手段阐明相关科学问题,认识该系统的作用机理和规律,具有很好的科学意义。该胶束的结构和模型药物选择设计思路等,国内外未见报道。本项目新颖性较好,研究力量较强,科研条件具备,有关工作基础较扎实,已进行部分前期研究,结果表明本项目的可行性良好。
中文关键词: 氨基肽酶N(CD13);靶向;抗肿瘤血管生成/抗肿瘤细胞;胶束;紫杉醇
英文摘要: Targeted drug delivery aims to increase the efficacy, and at the same time reduce the toxicity, of drugs in the body. Angiogenesis, which is defined as the formation of a neovascular blood supply derived from preexisting blood vessels, has been reported to be a critical step in tumor growth and metastasis. Aminopeptidase N (APN/CD13), as a new therapeutic target, plays a functional role in angiogenesis and invasion. It was reported that paclitaxel, cytotoxic anti-cancer drug, inhibits endothelial cell proliferation, motility, and tube formation at nanomolar concentrations. Therefore, in this project, paclitaxel-loaded NGR-modified SSL micelle was prepared and the mechanism of action of this new kind micelle was investigated, the potent dual targeted action of NGR to tumor cell as well as new blood vessel endothelial cell and the cytotoxic effect inhibiting endothelial cell proliferation of paclitaxel. It is important for clearing the mechanism of this new paclitaxel-loaded NGR modified micelles using molecular or biological methods.
英文关键词: Aminopeptidase N (APN/CD13); targeting; anti- angiogenesis; micelle; paclitaxel