1)三峡大学基础医学院,肿瘤微环境与免疫治疗湖北省重点实验室(三峡大学),宜昌 443002;2)三峡大学第一临床医学院(宜昌市中心人民医院)神经外科,宜昌 443000;3)三峡大学附属第二人民医院(宜昌市第二人民医院)超声科,宜昌 443003
国家自然科学基金(82371992),湖北省医学研究成果转化项目(WJ2023ZH0031)和肿瘤微环境与免疫治疗湖北省重点实验室开放基金(2022KZL2-05)资助。
1)College of Basic Medical Sciences, Hubei Key Laboratory of Tumor Microenvironment and Immunotherapy, China Three Gorges University, Yichang 443002, China;2)Department of Neurosurgery, The First Clinical Medical College of China Three Gorges University (Yichang Central People’s Hospital), Yichang 443000, China;3)Department of Ultrasonography, The Second People’s Hospital of China Three Gorges University (Yichang Second People’s Hospital), Yichang 443003, China
This work was supported by grants from The National Natural Science Foundation of China (82371992), Medical Research Achievement Transformation Project of Hubei Province (WJ2023ZH0031), and Hubei Provincial Key Laboratory of Tumor Microenvironment and Immunotherapy Open Fund (2022KZL2-05).
神经退行性疾病(neurodegenerative diseases,NDs)是一组以神经元结构和功能进行性丧失为特征的疾病,主要表现为认知功能下降、运动能力丧失及精神行为异常等症状,包括阿尔茨海默病(Alzheimer’s disease,AD)、帕金森病(Parkinson’s disease,PD)和肌萎缩侧索硬化症(amyotrophic lateral sclerosis,ALS)等。随着全球人口增长和老龄化趋势的加剧,NDs的发病率持续上升,目前尚无根治方法。血脑屏障(blood-brain barrier,BBB)在保护中枢神经系统稳定性、阻止血液中有害物质进入脑组织的同时,也限制了药物向脑实质的递送,为神经退行性疾病的治疗带来了巨大挑战。超声微泡靶向破坏(ultrasound-targeted microbubbles destruction,UTMD)技术是近年来在医学领域迅速发展的新兴技术,将聚焦超声(focused ultrasound,FUS)与微泡(microbubbles,MB)造影剂相结合,瞬时且可逆地打开BBB从而增加药物透过浓度,具有高效性、安全性和靶向性等特点,在NDs诊断和治疗领域具有巨大的开发潜力。本文介绍微泡的基本特征及超声微泡开放BBB的可能机制,并对UTMD技术在NDs治疗中的研究进展进行综述,旨在为神经退行性疾病治疗新策略和药物的研发提供理论依据和研究方向。
Neurodegenerative diseases (NDs) are a group of disorders characterized by the progressive loss of neuronal structure and function, leading to clinical manifestations such as cognitive decline, motor dysfunction, and neuropsychiatric abnormalities. NDs encompass a range of conditions, including Alzheimer’s disease (AD), Parkinson’s disease (PD), and amyotrophic lateral sclerosis (ALS), etc. With the intensifying trends of global population growth and aging, the incidence of NDs continues to rise, yet no curative treatments are currently available. The blood-brain barrier (BBB) plays a crucial role in maintaining central nervous system (CNS) homeostasis by blocking harmful substances in the bloodstream from entering brain tissue. More than 98% of small-molecule drugs and nearly 100% of large-molecule therapeutics fail to cross the BBB and reach brain parenchyma. Ultrasound-targeted microbubble destruction (UTMD) is an emerging interdisciplinary technology integrating materials science and bioengineering, which combines the advantages of microbubble carriers with the physical properties of ultrasound. This innovative approach enables transient and reversible opening of the BBB, and enhancing drug delivery efficiency. Microbubbles (MB) are the core component of the UTMD system, consisting of two fundamental structural elements: a gaseous core and a biocompatible outer shell. The drug-loading capacity of MB has been significantly expanded, evolving from traditional chemotherapeutic agents to encompass nucleic acid drugs, macromolecular antibodies, and even traditional Chinese medicines. Concurrently, their drug-loading strategies have advanced from initial passive physical adsorption to active targeted delivery. UTMD possesses the following 4 biological advantages. (1) UTMD can transiently and reversibly enhance the permeability of cell membranes and blood vessels. The biocompatible shells commonly used in microbubbles can be metabolized by the body, posing no risk of long-term accumulation. (2) UTMD not only significantly improves drug delivery efficiency but also simultaneously serves as an ultrasound contrast agent and therapeutic carrier, achieving the integration of diagnosis and treatment. (3) UTMD technology offers dual advantages of spatial targeting and molecular targeting, allowing for precise drug delivery. (4) UTMD only requires conventional ultrasound equipment, and the raw materials for microbubble preparation are readily available with simple synthesis processes. Whether applied in diagnostics or treatment, the cost remains relatively low. The mechanism by which UTMD opens the BBB is primarily associated with cavitation effect and sonoporation effect. The cavitation effect induces mechanical stretching of both cellular membranes and capillary walls, creating transient, reversible channels that facilitate macromolecular drug passage, to enhance BBB permeability. Meanwhile, the sonoporation effect promotes drug penetration through dual mechanisms: (1) augmenting passive diffusion across biological barriers; (2) potentiating active transport processes. This synergistic action significantly elevates both local drug concentrations and therapeutic efficacy at target sites. The permeability of BBB is predominantly influenced by both microbubble characteristics and ultrasound parameters. Microbubble characteristics and ultrasound parameters are key factors affecting BBB permeability. By adjusting the composition of microbubbles and optimizing ultrasound parameters, effective BBB opening can be achieved while minimizing tissue damage, to regulate the dosage of drugs delivered to the brain parenchyma. Both preclinical investigations and clinical trials have consistently shown that UTMD holds significant therapeutic promise for NDs. This article outlines the fundamental properties of microbubbles and elucidates the potential mechanisms underlying UTMD mediated BBB opening. Furthermore, it systematically reviews recent advances in UTMD technology for the treatment of treating various NDs, aiming to provide a theoretical foundation and future directions for developing novel therapeutic strategies and drugs for NDs.
李玲妍,郑若泉,胡火军,尤程程,杨轶,盛德乔,周军,黄益玲.超声靶向微泡破坏技术:神经退行性疾病治疗的新手段[J].生物化学与生物物理进展,2025,52(11):2759-2771
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