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Sci Rep:用抗体接株高分子实现对乳腺癌细胞的选择性给药

2017-03-27 佚名 Nature 自然科研

一篇名为Trastuzumab-grafted PAMAM dendrimers for the selective delivery of anticancer drugs to HER2-positive breast cancer的文章发表在《科学报告》上,文章利用特定抗体接株的树形高分子实现了对HER-2阳性乳腺癌细胞的选择性给药,为攻克乳腺癌提供了新的前景。大约20%的乳腺癌为人类表皮生

一篇名为Trastuzumab-grafted PAMAM dendrimers for the selective delivery of anticancer drugs to HER2-positive breast cancer的文章发表在《科学报告》上,文章利用特定抗体接株的树形高分子实现了对HER-2阳性乳腺癌细胞的选择性给药,为攻克乳腺癌提供了新的前景。

大约20%的乳腺癌为人类表皮生长因子受体2(HER-2)阳性。HER-2阳性乳腺癌比HER-2阴性乳腺癌更难治愈且更易复发。

TZ单抗接株的树形高分子对HER-2阳性乳腺癌细胞的选择性给药。

来自印度科学与工业研究理事会化学科技研究所的Ramakrishna Sistla与来自墨尔本皇家理工大学的DavidJ. Adams及其同事将HER-2的单克隆抗体曲妥珠单抗(TZ)接株在树形高分子上,这种人造分子有助于改善多西他赛(DTX)针对HER-2阳性乳腺癌细胞的给药。作者采用一种名为MAL-PEG-NHS的异质交联剂将TZ生物复合到树形高分子表面。为了方便对癌细胞进行成像分析,他们还在树形高分子中整合了异硫氰酸荧光素。

树状高分子对乳腺癌细胞的攻击效果。

作者对合成的树形高分子进行了一系列实验。体外研究显示,这些针对性树形高分子能够有选择地作用于HER-2阳性MDA-MB-453人类乳腺癌细胞,且对该类癌细胞显示出更高的防扩散效果,而对HER-2阴性MDA-MB-231人类乳腺癌细胞则影响较弱。相比未整合TZ的树形高分子,整合后的树形高分子对MDA-MB-453细胞具有更强的细胞内化与诱导凋亡能力。作者指出,将TZ结合在树形高分子表面有助于DTX的定位给药并减少特异性缺乏导致的系统毒性。另外,体内研究显示这种整合的纳米系统还显着改善了DTX的药代动力学特征。

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    2017-03-29 大爰

    不错学习了谢谢!

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    2017-03-29 yxch36

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