Nature Nanotechnology:绿茶不仅养生,将来也可用于治癌

2014-10-23 佚名 生物谷

新加坡科学家最近发现绿茶中的一种有效成分能够作为潜在的纳米载药系统用于输送蛋白药物以治疗癌症。在动物试验中,研究人员利用这种名为没食子酸(EGCG)的抗氧化剂来装载罗氏和基因泰克的抗乳腺癌药物Herceptin,相比于对照组,载药系统组疗效超出了两倍之多。同时,通过载药系统包载后,药物在肝脏和肾脏的积累降低了70%左右,在肺部的积累降低了40%。这一研究已经被发表在著名期刊 Nature Na

新加坡科学家最近发现绿茶中的一种有效成分能够作为潜在的纳米载药系统用于输送蛋白药物以治疗癌症。在动物试验中,研究人员利用这种名为没食子酸(EGCG)的抗氧化剂来装载罗氏和基因泰克的抗乳腺癌药物Herceptin,相比于对照组,载药系统组疗效超出了两倍之多。同时,通过载药系统包载后,药物在肝脏和肾脏的积累降低了70%左右,在肺部的积累降低了40%。这一研究已经被发表在著名期刊 Nature Nanotechnology上。

一直以来,EGCG都只被认为是绿茶中的一种有益成分,而它的载药系统功能则是最近才被发现的。研究人员将EGCG和聚乙二醇结合起来,使得EGCG能够保护蛋白质药物不被降解。负责这一研究的Jackie Ying介绍说,将绿茶中的有效成分应用到纳米医药领域尚属首次,而药物与载药系统的协同作用也令研究人员感到惊喜。

下一步,研究人员希望将这种载药系统拓展到个性化治疗和健康食品方面。

原始出处

Chung JE1, Tan S1, Gao SJ1, Yongvongsoontorn N1, Kim SH2, Lee JH2, Choi HS2, Yano H3, Zhuo L1, Kurisawa M1, Ying JY1.Self-assembled micellar nanocomplexes comprising green tea catechin derivatives and protein drugs for cancer therapy.Nat Nanotechnol. 2014 Oct 5

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    2015-04-18 shock_melon
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    2014-11-17 yinhl1990
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    2015-07-22 liye789132251
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    2014-10-25 hbwxf

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绿茶中的一种主要成分能够作为抗癌蛋白载体,用来合成一种稳定、有效的治疗用纳米复合物。在线发表于《自然-纳米技术》上的这项发现或有助于建立更好的药物投递系统。 一些癌症治疗方法的效果依赖于药剂中的治疗成分和将药物投递至肿瘤位置的载体。设计药物载体时,有几个因素必须考虑:首先,其必须具有特定性,这样才能针对肿瘤而不伤及其他组织;其次,药物与载体的配比也很重要,因为如果身体无法代谢载体的话

PLOS ONE:绿茶有助预防老年痴呆症

日本一个研究小组最新研究发现,绿茶具有预防老年痴呆症的作用,习惯每天喝绿茶的人,患病率大约只有不喝绿茶人的三分之一。 从2007年到2013年,日本金泽大学研究人员以石川县的490名60岁以上的居民为对象,调查了老年痴呆症的发病率。结果发现,在完全没有饮用绿茶习惯的138人中,有43人患上老年痴呆症或者轻度认知障碍;而每天饮用绿茶的157人中,只有18人患病。另外还发现,隔三差五喝绿茶的人患病风险