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Nanoscale:UTMD辅助PDT和基因治疗或可有效治疗三阴乳腺癌

2018-11-01 MedSci MedSci原创

三阴乳腺癌(TNBC)是一种侵袭性乳腺癌,由于缺乏孕激素受体(PR)、雌激素受体(ER)和HER2的表达,TNBC的复发率和整体存活率均差于其他乳腺癌亚型。为了提高TNBC的治疗效果,我们开发了一种新型多功能阳离子卟啉接枝脂质(CPGL)微泡,载有HIF1αsiRNA(siHIF@CpMB)。 由于CPGL的两亲结构,它可以与常规脂质自组装成微泡(MB),卟啉基团可以用作光动力疗法(PDT)

三阴乳腺癌(TNBC)是一种侵袭性乳腺癌,由于缺乏孕激素受体(PR)、雌激素受体(ER)和HER2的表达,TNBC的复发率和整体存活率均差于其他乳腺癌亚型。为了提高TNBC的治疗效果,我们开发了一种新型多功能阳离子卟啉接枝脂质(CPGL)微泡,载有HIF1αsiRNA(siHIF@CpMB)。

由于CPGL的两亲结构,它可以与常规脂质自组装成微泡(MB),卟啉基团可以用作光动力疗法(PDT)的光敏剂,而氨基可以通过静电吸附吸附HIF1αsiRNA(siHIF)。这种MB具有非常高的药物负载含量和较少的过早药物释放。通过实时US成像(3-12 MHz)可以轻松监控MB的分布。此外,借助超声靶向微泡破坏(UTMD),siHIF@CpMBs可以有效地原位转化为纳米粒子,通过空化效应促进卟啉和siRNA在肿瘤部位的积聚。HIF1αsiRNA下调HIF1α的表达水平,其由常见的缺氧肿瘤环境或ROS(由PDT产生)诱导,增强PDT功效并部分抑制肿瘤进展。

因此,UTMD辅助PDT和基因治疗的组合是治疗TNBC的有效策略。

原始出处:

Sun S, Xu Y, et al., Ultrasound-targeted photodynamic and gene dual therapy for effectively inhibiting triple negative breast cancer by cationic porphyrin lipid microbubbles loaded with HIF1α-siRNA. Nanoscale. 2018 Oct 22. doi: 10.1039/c8nr03074j. 

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    2019-05-22 江川靖瑶
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