本文主要研究内容
作者肖艳(2019)在《多功能纳米材料在癌症治疗中的应用》一文中研究指出:癌症,又称恶性肿瘤,已成为世界第二大致死因素,严重着威胁人类的健康。基于纳米材料独特理化性质设计多功能靶向纳米探针是癌症治疗领域的热门研究方向。本文以刺激响应性纳米材料为载体,进行肿瘤靶向药物递送和多手段联合治疗,主要由以下几个部分构成:1、酸响应的纳米配位聚合物用于化疗与T1-加权磁共振成像针对肿瘤组织附近的pH差异,我们设计了一款具有靶向功能和酸响应性质的纳米配位聚合物(NCP)用作载药平台以及磁共振成像探针。基底钆基纳米配位聚合物(GdNCP)材料在中性环境中能保持结构完整,在酸性环境中会发生坍塌。GdNCP在中性溶液中通过配位结合抗癌药物盐酸阿霉素(Dox)并使Dox的荧光猝灭,后续于颗粒外层修饰上一层透明质酸,以防止药物的提前泄露并提高材料靶向能力。该材料通过CD44受体介导的内吞作用进入HeLa细胞,继而被酸性细胞器捕获而发生结构坍塌,释放出游离的Dox和碎片化的GdNCP。Dox恢复的荧光使我们可以实时监测药物的释放过程,裂解成碎片的GdNCP增强了T1加权的磁共振信号。该材料具有良好的生物相容性和生物降解性,还具备癌细胞靶向能力,因此在癌症诊疗领域具有显著应用潜力。2、大孔硅原位生成MnO2用于改善乏氧环境中的光动力学治疗以及T1-加权磁共振成像传统光敏剂的低选择性和肿瘤组织自身的乏氧环境限制了光动力学治疗在临床上的实际应用效果。基于此,我们以大孔硅为基底,在其孔道内原位生长MnO1纳米颗粒,随后共价连接光敏剂Ce6和修饰靶向适配体AS1411,构建了一种对酸性环境和H2O2能够快速响应的智能纳米材料。当材料靶向进入癌细胞后,MnO2颗粒与H2O2快速反应生成氧气和Mn2+,前者改善了乏氧环境下的光动力治疗效果,后者加强了T1-加权磁共振信号。这种具有良好生物相容性和H202响应性的自供氧材料有望应用于临床治疗中。3、UCNPs@MOF结构用于近红外光触发的光动力学治疗和同步药物释放相较于紫外光和可见光,近红外拥有更强的组织穿透能力和更小的组织伤害性,在生物医学领域得到了广泛的研究。我们提出了一种上转换材料(UCNPs)表面生长金属有机框架结构(MOF)的方案,以期实现近红外光控制下的光动力学治疗和药物释放。当我们用980nm激光照射该材料(UCNPs@MOF)时,多层UCNPs内核可以在紫外光区和可见光区发射光子,外层MOF结构中的偶氮苯基团和光敏剂分子会继而吸收光子。紫光可见光照射下的偶氮苯光异构作用能够实现抗癌药物的释放;同时,可见光激发后的光敏剂可以产生单线态氧。通过探索这样的新型结构,有望实现近红外光控制的光动力学治疗和同步药物释放。
Abstract
ai zheng ,you chen e xing zhong liu ,yi cheng wei shi jie di er da zhi si yin su ,yan chong zhao wei xie ren lei de jian kang 。ji yu na mi cai liao du te li hua xing zhi she ji duo gong neng ba xiang na mi tan zhen shi ai zheng zhi liao ling yu de re men yan jiu fang xiang 。ben wen yi ci ji xiang ying xing na mi cai liao wei zai ti ,jin hang zhong liu ba xiang yao wu di song he duo shou duan lian ge zhi liao ,zhu yao you yi xia ji ge bu fen gou cheng :1、suan xiang ying de na mi pei wei ju ge wu yong yu hua liao yu T1-jia quan ci gong zhen cheng xiang zhen dui zhong liu zu zhi fu jin de pHcha yi ,wo men she ji le yi kuan ju you ba xiang gong neng he suan xiang ying xing zhi de na mi pei wei ju ge wu (NCP)yong zuo zai yao ping tai yi ji ci gong zhen cheng xiang tan zhen 。ji de ga ji na mi pei wei ju ge wu (GdNCP)cai liao zai zhong xing huan jing zhong neng bao chi jie gou wan zheng ,zai suan xing huan jing zhong hui fa sheng tan ta 。GdNCPzai zhong xing rong ye zhong tong guo pei wei jie ge kang ai yao wu yan suan a mei su (Dox)bing shi Doxde ying guang cu mie ,hou xu yu ke li wai ceng xiu shi shang yi ceng tou ming zhi suan ,yi fang zhi yao wu de di qian xie lou bing di gao cai liao ba xiang neng li 。gai cai liao tong guo CD44shou ti jie dao de nei tun zuo yong jin ru HeLaxi bao ,ji er bei suan xing xi bao qi bu huo er fa sheng jie gou tan ta ,shi fang chu you li de Doxhe sui pian hua de GdNCP。Doxhui fu de ying guang shi wo men ke yi shi shi jian ce yao wu de shi fang guo cheng ,lie jie cheng sui pian de GdNCPzeng jiang le T1jia quan de ci gong zhen xin hao 。gai cai liao ju you liang hao de sheng wu xiang rong xing he sheng wu jiang jie xing ,hai ju bei ai xi bao ba xiang neng li ,yin ci zai ai zheng zhen liao ling yu ju you xian zhe ying yong qian li 。2、da kong gui yuan wei sheng cheng MnO2yong yu gai shan fa yang huan jing zhong de guang dong li xue zhi liao yi ji T1-jia quan ci gong zhen cheng xiang chuan tong guang min ji de di shua ze xing he zhong liu zu zhi zi shen de fa yang huan jing xian zhi le guang dong li xue zhi liao zai lin chuang shang de shi ji ying yong xiao guo 。ji yu ci ,wo men yi da kong gui wei ji de ,zai ji kong dao nei yuan wei sheng chang MnO1na mi ke li ,sui hou gong jia lian jie guang min ji Ce6he xiu shi ba xiang kuo pei ti AS1411,gou jian le yi chong dui suan xing huan jing he H2O2neng gou kuai su xiang ying de zhi neng na mi cai liao 。dang cai liao ba xiang jin ru ai xi bao hou ,MnO2ke li yu H2O2kuai su fan ying sheng cheng yang qi he Mn2+,qian zhe gai shan le fa yang huan jing xia de guang dong li zhi liao xiao guo ,hou zhe jia jiang le T1-jia quan ci gong zhen xin hao 。zhe chong ju you liang hao sheng wu xiang rong xing he H202xiang ying xing de zi gong yang cai liao you wang ying yong yu lin chuang zhi liao zhong 。3、UCNPs@MOFjie gou yong yu jin gong wai guang chu fa de guang dong li xue zhi liao he tong bu yao wu shi fang xiang jiao yu zi wai guang he ke jian guang ,jin gong wai yong you geng jiang de zu zhi chuan tou neng li he geng xiao de zu zhi shang hai xing ,zai sheng wu yi xue ling yu de dao le an fan de yan jiu 。wo men di chu le yi chong shang zhuai huan cai liao (UCNPs)biao mian sheng chang jin shu you ji kuang jia jie gou (MOF)de fang an ,yi ji shi xian jin gong wai guang kong zhi xia de guang dong li xue zhi liao he yao wu shi fang 。dang wo men yong 980nmji guang zhao she gai cai liao (UCNPs@MOF)shi ,duo ceng UCNPsnei he ke yi zai zi wai guang ou he ke jian guang ou fa she guang zi ,wai ceng MOFjie gou zhong de ou dan ben ji tuan he guang min ji fen zi hui ji er xi shou guang zi 。zi guang ke jian guang zhao she xia de ou dan ben guang yi gou zuo yong neng gou shi xian kang ai yao wu de shi fang ;tong shi ,ke jian guang ji fa hou de guang min ji ke yi chan sheng chan xian tai yang 。tong guo tan suo zhe yang de xin xing jie gou ,you wang shi xian jin gong wai guang kong zhi de guang dong li xue zhi liao he tong bu yao wu shi fang 。
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论文作者分别是来自南京大学的肖艳,发表于刊物南京大学2019-07-02论文,是一篇关于酸响应论文,药物递送论文,磁共振成像论文,纳米配位聚合物论文,光动力学治疗论文,上转换材料论文,金属有机框架结构论文,南京大学2019-07-02论文的文章。本文可供学术参考使用,各位学者可以免费参考阅读下载,文章观点不代表本站观点,资料来自南京大学2019-07-02论文网站,若本站收录的文献无意侵犯了您的著作版权,请联系我们删除。
标签:酸响应论文; 药物递送论文; 磁共振成像论文; 纳米配位聚合物论文; 光动力学治疗论文; 上转换材料论文; 金属有机框架结构论文; 南京大学2019-07-02论文;