Targeted Neuronal Injury for the Non-Invasive Disconnection of Brain Circuitry

作者： Wilson Wang*1, Yanrong Zhang*2, Matthew J. Anzivino1, Edward H. Bertram3, James Woznak1,4, Alexander Klibanov5, Erik Dumont6, Max Wintermark*2, Kevin S. Lee*1,7,8 1Department of Neuroscience,University of Virginia, 2Department of Radiology,Stanford University, 3Department of Neurology,University of Virginia, 4Global Internship Program,Focused Ultrasound Foundation, 5Department of Medicine,University of Virginia, 6Image Guided Therapy, 7Department of Neurosurgery,University of Virginia, 8Center for Brain, Immunology, and Glia,University of Virginia

简介：

Overview

This study presents a non-invasive method for producing focal neuronal lesions in the brain, utilizing Magnetic Resonance-guided Focused Ultrasound (MRgFUS). By transiently opening the blood-brain barrier, a neurotoxin is delivered to targeted regions, enabling precise neuronal loss without damaging surrounding tissues.

Key Study Components

Area of Science

• Neuroscience
• Non-invasive surgical techniques
• Neuronal lesioning

Background

• Current surgical interventions for neurological diseases can be invasive and damaging to non-target tissues.
• A non-invasive technique for producing neuronal lesions is sought to enhance treatment options.
• The study explores the Ping method, which focuses on precisely targeting neuronal loss.
• This method involves opening the blood-brain barrier and delivering a neurotoxin systemically.

Purpose of Study

• To demonstrate a non-invasive approach for creating neuronal lesions in targeted brain areas.
• To utilize MRgFUS for focal blood-brain barrier openings.
• To assess the effectiveness and specificity of the neurotoxin delivery.

Methods Used

• Magnetic Resonance-guided Focused Ultrasound (MRgFUS) was employed.
• Animal models, specifically the tish rat, were used to target cortical malformations.
• The method includes a series of steps: animal preparation, administration of microbubbles, sonication, and infusion of quinolinic acid.
• Histological analysis was performed post-euthanasia to evaluate neuronal degeneration.

Main Results

• The Ping method successfully produced neuronal loss localized to the areas where the blood-brain barrier was opened.
• Fluoro Jade staining indicated numerous degenerating neurons within targeted regions.
• Focused ultrasound followed by neurotoxin administration demonstrated precise targeting capabilities.
• Post-mortem analyses revealed the effectiveness of the method in achieving its goals.

Conclusions

• This study provides evidence for a non-invasive surgical technique to selectively induce neuronal lesions.
• The methodology demonstrated the potential to enhance therapeutic strategies for neurological disorders.
• Insights gained could advance the understanding of neuronal mechanisms and treatment paradigms.

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