疾病部位靶向给药系统一直是药剂学研究的热点,但人体内非常复杂的环境因素明显影响了药物靶向治疗的效果。肿瘤组织血管和生理特征的异常使得纳米载体携带抗肿瘤药物进入机体后,往往富集在肿瘤血管的周边或肿瘤细胞的间隙然后释放出药物,经常导致细胞内药物的浓度较低,治疗效果并不非常明显。
最近,为解决这一瓶颈问题,国家纳米科学中心梁兴杰课题组的研究人员采用具有肿瘤靶向性以及渗透性的新型短肽分子修饰于纳米胶束表面,通过与非功能化修饰的纳米胶束对比实验发现,此靶向型纳米载体系统可以有效增强载带药物对于肿瘤细胞的杀伤效果,在治疗时间内显著增强了药物在细胞内的有效作用浓度,活体动物实验也表明,此靶向胶束可以有效的富集于小鼠肿瘤组织,增强药物在肿瘤组织内的渗透,且能维持较长时间的血药浓度。该纳米药物载体合成方法简单易行,具有一定的应用前景。
目前,相关研究成果已在线发表于《纳米快报》(Nano Letters,DOI: 10.1021/nl400586t)上。
该工作得到国家自然科学基金、科技部纳米重大研究计划、中科院“百人计划”等项目的支持。(生物谷Bioon.com)
DOI: 10.1021/nl400586t
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Functionalized Nanoscale Micelles Improve Drug Delivery for Cancer Therapy in Vitro and in Vivo
Tuo Wei , Juan Liu , Huili Ma , Qiang Cheng , Yuanyu Huang , Jing Zhao , Shuaidong Huo , Xiangdong Xue , Zicai Liang , and Xing-Jie Liang
In October 2011, we—David H. Gar?eld, MD, medical oncologist, United States; Harold Jacob Brenner, MD, FRCR,radiation oncologist, Israel; and Lucy Lu, oncology nurse,Shanghai, China—were part of a group that opened the ?rst of planned multiple outpatient cancer centers in China, offering radiation therapy, chemotherapy, and imaging, including magnetic resonance imaging (MRI), computed tomography (CT),ultrasound, and mammography. Although we had previously researched oncology in China, we were still in for a great many surprises