本文主要研究内容
作者陈仕红(2019)在《姜黄素和阿霉素双载药靶向脂质体的制备及抗肿瘤活性研究》一文中研究指出:目的结肠癌作为当今社会危害人类健康的恶性肿瘤之一,已受到越来越多人的重视。现代医疗对结肠癌的治疗方法主要是利用化学药物对肿瘤进行抑制,但越来越多化学药物的应用,肿瘤出现了耐药性,肿瘤的治疗难度也越来越大。在众多化学药物中,阿霉素因抗瘤谱广,应用最为广泛,但也存在肿瘤治疗的耐药问题。随着众多学者对肿瘤的不断深入研究,发现了肿瘤部位特殊的微环境,也发现因肿瘤部位的强渗透与滞留效应会导致化疗药物治疗效果不佳,因此,纳米粒子递送系统应运而生。纳米粒子递送系统借助纳米粒子微米尺寸的优势可停滞在肿瘤部位,且不会被淋巴循环带走,是一种很好的药物递送载体。但因其只具有一定的特异性,靶向效果不佳,若利用肿瘤细胞的特异性,达到主动靶向的作用,将会是一种很有效的药物输送系统。利用脂质体包载阿霉素,形成阿霉素脂质体,虽然可以一定程度上提高肿瘤的治疗效果,但却因肿瘤多药耐药现象的存在,治疗效果受到一定限制。姜黄素作为我国传统中药,也是一种可食用的色素,具有抗炎、抗血管生成、抗肿瘤等多种药理活性,随着现代研究的深入,发现姜黄素还具有抑制P-糖蛋白的功能。肿瘤多药耐药产生的重要原因之一就是P-糖蛋白的过表达,因此,姜黄素是一种潜在的多药耐药的逆转剂。方法本文利用脂质体作为药物载体,以姜黄素作为化疗增敏剂,阿霉素作为化疗药物制备双载药的脂质体,为达到更加有效的抗肿瘤效果,采用主客体识别的方法对姜黄素水溶性进行改善,利用cRGD肽与肿瘤部位过表达的整合素ανβ3特异性结合,以达到脂质体主动靶向作用。结果本研究首先制备出姜黄素包合物,采用傅里叶红外光谱与X-射线衍射法对姜黄素包合产物进行验证。其次,采用薄膜法制备脂质体,并对脂质体的组成比例进行优化,经过粒径、PDI、包封率和载药量的比较,优选出磷脂和胆固醇最佳比例为5:1的制备方案,得到粒径为364.3±2.036 nm,PDI为0.194±0.059,包封率为94.95%,载药量为1.36%的脂质体。然后,采用FTIR和H-NMR验证合成的DSPE-PEG2000-cRGD,并采用薄膜法制备出cRGD-(CUR-CD+DOX)-LPs(2:1)脂质体,TEM验证脂质体的外观形貌,粒径仪测得cRGD-(CUR-CD+DOX)-LPs(2:1)的粒径为379.5±4.950 nm,PDI为0.192±0.01,Zeta电位为-15.1±4.34 mV,高效液相色谱法测得DOX载药量为0.15%,包封率为71.28%;CUR载药量为0.30%;包封率为50.80%。最后,研究cRGD-(CUR-CD+DOX)-LPs(2:1)对肿瘤细胞的抑制效果。经流式细胞仪检测细胞内吞的平均荧光强度、荧光倒置显微镜观察荧光强度,筛选出脂质体表面最佳cRGD肽的密度为9.56%;采用MTT法考察考察其对细胞的毒性,结果显示与阿霉素盐酸盐水溶液(DOX-sol)相比能明显抑制肿瘤生长;为研究其内吞途径,采用流式细胞仪检测荧光强度,得出脂质体进入细胞的途径是通过内吞途径进入细胞,以小窝蛋白介导的方式以及非网格蛋白和小窝蛋白介导的方式入胞。采用荧光显微镜、激光共聚焦扫描显微镜和流式细胞仪检测各种制剂在细胞中的内吞量,结果表明cRGD-(CUR-CD+DOX)-LPs(2:1)处理细胞后DOX的红色荧光最强,效果最好。研究cRGD-(CUR-CD+DOX)-LPs(2:1)对细胞周期的结果中,cRGD-(CUR-CD+DOX)-LPs(2:1)可将HCT-8/TAX细胞阻滞于有丝分裂的G2/M期,在促细胞凋亡结果中有明显的促细胞凋亡作用。结论将DOX和CUR-CD共载进脂质体,并在表面修饰上靶向基团cRGD,得到cRGD-(CUR-CD+DOX)-LPs(2:1)。通过细胞实验结果表明,所制脂质体除对HCT-8/TAX细胞显示出良好的抗肿瘤效果外,还具有一定的逆转多药耐药作用,为开发改善型结肠癌纳米粒子递送系统提供了有效的实验依据。
Abstract
mu de jie chang ai zuo wei dang jin she hui wei hai ren lei jian kang de e xing zhong liu zhi yi ,yi shou dao yue lai yue duo ren de chong shi 。xian dai yi liao dui jie chang ai de zhi liao fang fa zhu yao shi li yong hua xue yao wu dui zhong liu jin hang yi zhi ,dan yue lai yue duo hua xue yao wu de ying yong ,zhong liu chu xian le nai yao xing ,zhong liu de zhi liao nan du ye yue lai yue da 。zai zhong duo hua xue yao wu zhong ,a mei su yin kang liu pu an ,ying yong zui wei an fan ,dan ye cun zai zhong liu zhi liao de nai yao wen ti 。sui zhao zhong duo xue zhe dui zhong liu de bu duan shen ru yan jiu ,fa xian le zhong liu bu wei te shu de wei huan jing ,ye fa xian yin zhong liu bu wei de jiang shen tou yu zhi liu xiao ying hui dao zhi hua liao yao wu zhi liao xiao guo bu jia ,yin ci ,na mi li zi di song ji tong ying yun er sheng 。na mi li zi di song ji tong jie zhu na mi li zi wei mi che cun de you shi ke ting zhi zai zhong liu bu wei ,ju bu hui bei lin ba xun huan dai zou ,shi yi chong hen hao de yao wu di song zai ti 。dan yin ji zhi ju you yi ding de te yi xing ,ba xiang xiao guo bu jia ,re li yong zhong liu xi bao de te yi xing ,da dao zhu dong ba xiang de zuo yong ,jiang hui shi yi chong hen you xiao de yao wu shu song ji tong 。li yong zhi zhi ti bao zai a mei su ,xing cheng a mei su zhi zhi ti ,sui ran ke yi yi ding cheng du shang di gao zhong liu de zhi liao xiao guo ,dan que yin zhong liu duo yao nai yao xian xiang de cun zai ,zhi liao xiao guo shou dao yi ding xian zhi 。jiang huang su zuo wei wo guo chuan tong zhong yao ,ye shi yi chong ke shi yong de se su ,ju you kang yan 、kang xie guan sheng cheng 、kang zhong liu deng duo chong yao li huo xing ,sui zhao xian dai yan jiu de shen ru ,fa xian jiang huang su hai ju you yi zhi P-tang dan bai de gong neng 。zhong liu duo yao nai yao chan sheng de chong yao yuan yin zhi yi jiu shi P-tang dan bai de guo biao da ,yin ci ,jiang huang su shi yi chong qian zai de duo yao nai yao de ni zhuai ji 。fang fa ben wen li yong zhi zhi ti zuo wei yao wu zai ti ,yi jiang huang su zuo wei hua liao zeng min ji ,a mei su zuo wei hua liao yao wu zhi bei shuang zai yao de zhi zhi ti ,wei da dao geng jia you xiao de kang zhong liu xiao guo ,cai yong zhu ke ti shi bie de fang fa dui jiang huang su shui rong xing jin hang gai shan ,li yong cRGDtai yu zhong liu bu wei guo biao da de zheng ge su ανβ3te yi xing jie ge ,yi da dao zhi zhi ti zhu dong ba xiang zuo yong 。jie guo ben yan jiu shou xian zhi bei chu jiang huang su bao ge wu ,cai yong fu li xie gong wai guang pu yu X-she xian yan she fa dui jiang huang su bao ge chan wu jin hang yan zheng 。ji ci ,cai yong bao mo fa zhi bei zhi zhi ti ,bing dui zhi zhi ti de zu cheng bi li jin hang you hua ,jing guo li jing 、PDI、bao feng lv he zai yao liang de bi jiao ,you shua chu lin zhi he dan gu chun zui jia bi li wei 5:1de zhi bei fang an ,de dao li jing wei 364.3±2.036 nm,PDIwei 0.194±0.059,bao feng lv wei 94.95%,zai yao liang wei 1.36%de zhi zhi ti 。ran hou ,cai yong FTIRhe H-NMRyan zheng ge cheng de DSPE-PEG2000-cRGD,bing cai yong bao mo fa zhi bei chu cRGD-(CUR-CD+DOX)-LPs(2:1)zhi zhi ti ,TEMyan zheng zhi zhi ti de wai guan xing mao ,li jing yi ce de cRGD-(CUR-CD+DOX)-LPs(2:1)de li jing wei 379.5±4.950 nm,PDIwei 0.192±0.01,Zetadian wei wei -15.1±4.34 mV,gao xiao ye xiang se pu fa ce de DOXzai yao liang wei 0.15%,bao feng lv wei 71.28%;CURzai yao liang wei 0.30%;bao feng lv wei 50.80%。zui hou ,yan jiu cRGD-(CUR-CD+DOX)-LPs(2:1)dui zhong liu xi bao de yi zhi xiao guo 。jing liu shi xi bao yi jian ce xi bao nei tun de ping jun ying guang jiang du 、ying guang dao zhi xian wei jing guan cha ying guang jiang du ,shai shua chu zhi zhi ti biao mian zui jia cRGDtai de mi du wei 9.56%;cai yong MTTfa kao cha kao cha ji dui xi bao de du xing ,jie guo xian shi yu a mei su yan suan yan shui rong ye (DOX-sol)xiang bi neng ming xian yi zhi zhong liu sheng chang ;wei yan jiu ji nei tun tu jing ,cai yong liu shi xi bao yi jian ce ying guang jiang du ,de chu zhi zhi ti jin ru xi bao de tu jing shi tong guo nei tun tu jing jin ru xi bao ,yi xiao wo dan bai jie dao de fang shi yi ji fei wang ge dan bai he xiao wo dan bai jie dao de fang shi ru bao 。cai yong ying guang xian wei jing 、ji guang gong ju jiao sao miao xian wei jing he liu shi xi bao yi jian ce ge chong zhi ji zai xi bao zhong de nei tun liang ,jie guo biao ming cRGD-(CUR-CD+DOX)-LPs(2:1)chu li xi bao hou DOXde gong se ying guang zui jiang ,xiao guo zui hao 。yan jiu cRGD-(CUR-CD+DOX)-LPs(2:1)dui xi bao zhou ji de jie guo zhong ,cRGD-(CUR-CD+DOX)-LPs(2:1)ke jiang HCT-8/TAXxi bao zu zhi yu you si fen lie de G2/Mji ,zai cu xi bao diao wang jie guo zhong you ming xian de cu xi bao diao wang zuo yong 。jie lun jiang DOXhe CUR-CDgong zai jin zhi zhi ti ,bing zai biao mian xiu shi shang ba xiang ji tuan cRGD,de dao cRGD-(CUR-CD+DOX)-LPs(2:1)。tong guo xi bao shi yan jie guo biao ming ,suo zhi zhi zhi ti chu dui HCT-8/TAXxi bao xian shi chu liang hao de kang zhong liu xiao guo wai ,hai ju you yi ding de ni zhuai duo yao nai yao zuo yong ,wei kai fa gai shan xing jie chang ai na mi li zi di song ji tong di gong le you xiao de shi yan yi ju 。
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论文作者分别是来自湖北中医药大学的陈仕红,发表于刊物湖北中医药大学2019-07-05论文,是一篇关于脂质体论文,逆转多药耐药论文,靶向给药系统论文,肿瘤论文,湖北中医药大学2019-07-05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,资料来自湖北中医药大学2019-07-05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:脂质体论文; 逆转多药耐药论文; 靶向给药系统论文; 肿瘤论文; 湖北中医药大学2019-07-05论文;