通过巨噬细胞膜自组装和低频超声辐照辅助的靶向聚合物增强胶质瘤特异性药物递送

Enhancing glioma-specific drug delivery through self-assembly of macrophage membrane and targeted polymer assisted by low-frequency ultrasound irradiation.

作者信息

Lin Junqing, Lin Zhenhu, Liu Leilei, Lin Wenjin, Xie Xiaodong, Zhang Xiujuan

机构信息

Department of Interventional Radiology, Fujian Medical University Union Hospital, Fuzhou, China.

Department of Ultrasound, Fujian Medical University Union Hospital, Fuzhou, 350001, Fujian, China.

出版信息

Mater Today Bio. 2024 Apr 25;26:101067. doi: 10.1016/j.mtbio.2024.101067. eCollection 2024 Jun.

Abstract

The blood-brain Barrier (BBB), combined with immune clearance, contributes to the low efficacy of drug delivery and suboptimal treatment outcomes in glioma. Here, we propose a novel approach that combines the self-assembly of mouse bone marrow-derived macrophage membrane with a targeted positive charge polymer (An-PEI), along with low-frequency ultrasound (LFU) irradiation, to achieve efficient and safe therapy for glioma. Our findings demonstrate the efficacy of a charge-induced self-assembly strategy, resulting in a stable co-delivery nanosystem with a high drug loading efficiency of 44.2 %. Moreover, this structure triggers a significant release of temozolomide in the acidic environment of the tumor microenvironment. Additionally, the macrophage membrane coating expresses Spyproteins, which increase the amount of An-BMP-TMZ that can evade the immune system by 40 %, while LFU irradiation treatment facilitates the opening of the BBB, allowing for enormously increased entry of An-BMP-TMZ (approximately 400 %) into the brain. Furthermore, after crossing the BBB, the Angiopep-2 peptide-modified An-BMP-TMZ exhibits the ability to selectively target glioma cells. These advantages result in an obvious tumor inhibition effect in animal experiments and significantly improve the survival of glioma-bearing mice. These results suggest that combining the macrophage membrane-coated drug delivery system with LFU irradiation offers a feasible approach for the accurate, efficient and safe treatment of brain disease.

摘要

血脑屏障(BBB)与免疫清除作用相结合,导致胶质瘤药物递送效率低下和治疗效果欠佳。在此,我们提出一种新方法,即将小鼠骨髓源性巨噬细胞膜的自组装与靶向正电荷聚合物(An-PEI)相结合,并进行低频超声(LFU)照射,以实现对胶质瘤的高效安全治疗。我们的研究结果证明了电荷诱导自组装策略的有效性,形成了一种稳定的共递送纳米系统,其药物负载效率高达44.2%。此外,这种结构在肿瘤微环境的酸性条件下能触发替莫唑胺的大量释放。另外,巨噬细胞膜涂层表达Spy蛋白,可使逃避免疫系统的An-BMP-TMZ量增加40%,而LFU照射处理有助于打开血脑屏障,使An-BMP-TMZ进入大脑的量大幅增加(约400%)。此外,穿过血脑屏障后,血管生成素-2肽修饰的An-BMP-TMZ表现出选择性靶向胶质瘤细胞的能力。这些优势在动物实验中产生了明显的肿瘤抑制效果,并显著提高了荷瘤小鼠的存活率。这些结果表明,将巨噬细胞膜包被的药物递送系统与LFU照射相结合为准确、高效、安全地治疗脑部疾病提供了一种可行的方法。

https://cdn.ncbi.nlm.nih.gov/pmc/blobs/e9e7/11068854/0a660339caab/ga1.jpg

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