ICRA 2012 Paper Abstract

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Paper TuB07.3

Tabatabaei, Seyed Nasrollah (Ecole Polytechnique de Montreal), Sonia, Duchemin (Cerebrovascular Pharmacology Laboratory, Department of Pharmacol), Giouard, Hélène (Cerebrovascular Pharmacology Laboratory, Department of Pharmacol), Martel, Sylvain (Ecole Polytechnique de Montreal (EPM))

Towards MR-Navigable Nanorobotic Carriers for Drug Delivery into the Brain

Scheduled for presentation during the Regular Session "Micro and Nano Robots I" (TuB07), Tuesday, May 15, 2012, 11:00−11:15, Meeting Room 7 (Remnicha)

2012 IEEE International Conference on Robotics and Automation, May 14-18, 2012, RiverCentre, Saint Paul, Minnesota, USA

This information is tentative and subject to change. Compiled on December 11, 2017

Keywords Micro/Nano Robots, Micro and Nanoscale Automation, Brain Machine Interface

Abstract

Magnetic Resonance Navigation (MRN) relies on Magnetic Nanoparticles (MNPs) embedded in microcarriers or microrobots to allow the induction of a directional propelling force by 3D magnetic gradients. These magnetic gradients are superposed on a sufficiently high homogeneous magnetic field to achieve maximum propelling force through magnetization saturation of the MNP. As previously demonstrated by our group, such technique was successful at maintaining microcarriers along a planned trajectory in the blood vessels based on tracking information gathered using Magnetic Resonance Imaging (MRI) sequences from artifacts caused by the same MNPs. Besides propulsion and tracking, the same MNPs can be synthesized with characteristics that can allow for the diffusion of therapeutic cargo carried by these MR-navigable carriers through the Blood Brain Barrier (BBB) using localized hyperthermia without compromising the MRN capabilities. In the present study, an external heating apparatus was used to impose a regional heat shock on the skull of a living mouse model. The effect of heat on the permeability of the BBB was assessed using histological observation and tissue staining by Evans blue dye. Results show direct correlation between hyperthermia and BBB leakage as well as its recovery from thermal damage. Therefore, the proposed navigable agents could be suitable for controlled opening of the BBB by hyperthermia and selective brain drug delivery.

 

 

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