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In vivo imaging and biodistribution of near infrared dye loaded brain-metastatic-breast-cancer-cell-membrane coated polymeric nanoparticles

机译:在近红外染料近红外染料的体内成像和生物分布中脑 - 转移乳腺癌 - 膜膜涂覆的聚合物纳米颗粒

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摘要

Brain metastatic breast cancer is challenging to treat due to the presence of the blood-brain barrier (BBB) and a lack of ability to target precisely. Most drugs fail to cross the BBB limiting their effectiveness. To combat this problem, a brain metastatic breast cancer cell (MDA-MB-831) membrane-coated polymeric nanoparticle (CCNP) was synthesized. The small size (similar to 70 nm) and anionic surface charge (-20 mV) achieved during formulation allowed for high penetration and retention in the brain when compared to the PEGylated polymeric nanoparticle alone (mPEG-PLGA or NP). Doxorubicin-loaded CCNP showed high preferential cytotoxicity in vitro. Live (4-120 h) and ex vivo near-infrared imaging in nude mice showed extended circulation and retention of CCNP compared to uncoated nanoparticles. These data indicate that drug/dye-loaded CCNPs demonstrate excellent potential for cancer theranostics of brain metastatic breast tumors.
机译:由于血脑屏障(BBB)的存在以及缺乏靶向靶向的能力,脑转移性乳腺癌是挑战性的挑战。 大多数药物未能跨越限制其有效性的BBB。 为了解决这个问题,合成了脑转移乳腺癌细胞(MDA-MB-831)膜涂覆的聚合物纳米颗粒(CCNP)。 与单独的聚乙二醇化聚合物纳米颗粒相比(MPEG-PLGA或NP)相比,在制剂中允许在脑内允许高渗透和保留期间实现的小尺寸(类似于70nm)和阴离子表面电荷(-20mV)。 加载oxorubicin的CCNP在体外显示出高的优先细胞毒性。 Live(4-120 H)和裸鼠中的近红外成像显示出与未涂覆的纳米颗粒相比,CCNP的延长循环和保留。 这些数据表明,药物/染料负载的CCNP表现出脑转移乳腺肿瘤的癌症治疗患者的优异潜力。

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