首页> 外文会议>First International Workshop on the Application of High Intensity Focused Ultrasound (Hifu) in Medicine, May 10-12, 2001, Chongqing, China >Noninvasive MRI-Guided Focal Opening of Blood BrainBarrier: Potential Use for Targeted Drug Delivery
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Noninvasive MRI-Guided Focal Opening of Blood BrainBarrier: Potential Use for Targeted Drug Delivery

机译:非侵入性MRI引导的血脑屏障局灶性开放:靶向药物输送的潜在用途

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摘要

The purpose was to test the hypothesis that focused ultrasound beams can be used to locally open the blood brain barrier (BBB) without damage to the surrounding brain tissue, and that Magnetic Resonance (MR) Imaging can be used to monitor this procedure. In spite of the large number of very potent neurologically active substances and drugs, many CNS diseases are difficult to treat due the inability of many large molecular size agents to penetrate the BBB. The BBB is a major limitation for utilizing neuropeptides, proteins, chemotherapeutic agents and genes for therapy. After non-localized, diffuse opening of the BBB, agents administered systematically or injected into the blood stream have undesired, often dose-limiting side effects due to their spread within the CNS. However, these substances could have more definitive therapeutic effect if their release in the brain could be localized. Image-guided monitoring and controlled opening of the BBB at a desired location could thus result in novel methods of treating CNS diseases such as brain tumors, seizure and movement disorders.
机译:目的是检验以下假设:聚焦超声束可用于局部打开血脑屏障(BBB)而不会损坏周围的脑组织,并且磁共振(MR)成像可用于监视此过程。尽管存在大量非常有效的神经活性物质和药物,但由于许多大分子药物无法穿透血脑屏障,许多中枢神经系统疾病仍难以治疗。 BBB是利用神经肽,蛋白质,化学治疗剂和基因进行治疗的主要限制。在BBB的非局限性,弥散性开放后,由于其在CNS中的扩散,系统地给药或注入血流的药物具有不良的,常常是剂量限制性的副作用。但是,如果这些物质在大脑中的释放可以局部定位的话,它们可能具有更明确的治疗效果。图像引导的监测和BBB在所需位置的受控打开可能会导致治疗CNS疾病(例如脑瘤,癫痫发作和运动障碍)的新方法。

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