Biomaterials:中科大开发纳米给药系统可同时杀伤乳腺癌细胞和癌症干细胞

2016-07-13 佚名 生物谷

近日,来自中国科学技术大学的王均教授实验室在国际学术期刊Biomaterials上发表了一项最新研究进展,他们发现借助纳米颗粒运输系统将自噬抑制药物和化疗药物联合使用可以有效杀伤乳腺癌细胞和乳腺癌干细胞,该研究为解决因乳腺癌干细胞导致的治疗抵抗及复发等问题提供了一个新的治疗方法。在过去十年内,癌症干细胞的概念迅速发展,得到了越来越多的关注,科学家们认为癌症干细胞在肿瘤起始、进展和转移、复发以及药物

近日,来自中国科学技术大学的王均教授实验室在国际学术期刊Biomaterials上发表了一项最新研究进展,他们发现借助纳米颗粒运输系统将自噬抑制药物和化疗药物联合使用可以有效杀伤乳腺癌细胞和乳腺癌干细胞,该研究为解决因乳腺癌干细胞导致的治疗抵抗及复发等问题提供了一个新的治疗方法。

在过去十年内,癌症干细胞的概念迅速发展,得到了越来越多的关注,科学家们认为癌症干细胞在肿瘤起始、进展和转移、复发以及药物抵抗过程中扮演了重要角色。同时消灭数量庞大的肿瘤细胞和数量稀少的癌症干细胞亚群可能会产生良好的治疗效果,并最终导致癌症病情的缓解。

越来越多的证据表明自噬在癌症干细胞维持,可塑性和存活方面发挥重要功能。在这项研究中,研究人员对自噬如何影响乳腺癌干细胞对化疗药物的易感性进行了研究,他们首先从乳腺癌细胞系MDA-MB-231中分选出ALDHhi细胞,用氯喹(CQ,一种自噬抑制剂药物)对细胞的自噬过程进行抑制,结果发现乳腺癌干细胞的干性发生下降,对化疗药物(DOX和DTXL)的易感性增加。

近些年纳米医学领域也取得了长足发展,特别是借助纳米颗粒运输系统进行药物输送已经在多种疾病的治疗中得到证明。在该研究中研究人员进一步证明在体外培养条件下纳米颗粒介导的自噬抑制能够促进化疗药物对ALDHhi MDA-MB-231细胞的治疗效率。通过纳米药物运输系统给药可以显著延长DOX和DTXL这两种药物的循环半寿期,增加药物在肿瘤组织和ALDHhi细胞中的富集。更加重要的是,研究人员利用MDA-MB-231细胞建立的肿瘤正位小鼠模型进行研究发现,相比于单种药物治疗,将分别装载CQ(NPCQ)和DOX(NPDOX)的纳米颗粒联合使用以及将两种药物包装在同一个纳米运输系统(NPCQ/DOX)中能够同时清除肿瘤细胞和癌症干细胞,展现出更加有效和持续的肿瘤生长抑制作用。

因此,该研究表明借助纳米颗粒药物运输系统将自噬抑制药物和化疗药物同时送达肿瘤部位能够有效地发挥杀伤作用,是治疗乳腺癌的一种有效策略。

原始出处

Rong Suna, 1, Song Shenb, 1, Yun-Jiao Zhanga, Cong-Fei Xua, Zhi-Ting Caoa, Long-Ping Wena, Jun Wang.Nanoparticle-facilitated autophagy inhibition promotes the efficacy of chemotherapeutics against breast cancer stem cells.Biomaterials.2016

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    2016-12-27 sunylz
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    2016-07-15 yxch36
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