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ThinkMind // International Journal On Advances in Systems and Measurements, volume 3, numbers 3 and 4, 2010 // View article sysmea_v3_n34_2010_1

Combining Aggregates of Synthetic Microscale Nanorobots with Swarms of Computer-controlled Flagellated Bacterial Robots to Enhance Target Therapies Through the Human Vascular Network

Authors:
Sylvain Martel

Keywords: Magnetic nanoparticles; medical nanorobots, magnetic resonance imaging, magnetotactic bacteria, target therapy

Abstract:
The field of medical nanorobotics exploits nanometer-scale components and phenomena to enable new or at least to enhance existing medical diagnostic and interventional procedures. The best route for such miniature robots to access the various regions inside the human body is certainly the vascular network which is constituted of nearly 100,000 km of blood vessels. The variations in blood vessels diameters from a few millimeters in the arteries, down to ~4 µm in the capillaries with respective important variations in blood flow velocities, lead to significant challenges in the development of a robot relying on a singe type of propulsion method while being trackable in the human body. This tracking feasibility in a living body was realized experimentally by integrating magnetic nanoparticles (MNP) capable of creating a net field inhomogeneity that could be detected by magnetic resonance imaging (MRI). In such an environment, dipole-dipole interaction between synthetic microscale nanorobots encapsulating MNP can be used to achieve higher magnetophoretic velocities when subjected to a 3D magnetic gradient force generated by an upgraded MRI platform to allow such aggregated nanorobots to travel in the blood circulatory network. Nonetheless, the potential limitations of using an artificial approach especially in the human microvasculature suggests that a biological system such as the molecular motors capable of flagellar propelling thrust force exceeding 4 pN provided by each MC-1 MRI-trackable magnetotactic bacteria swimming as swarms under computer control in blood vessels could enhance targeting efficacy in regions such as tumors. Presently, such artificial and natural approaches are unique and very different from any other methods proposed elsewhere. In this paper, these approaches are described with examples of implementations with the goal of demonstrating the potential advantages of combining them for targeting regions deep in the human body.

Pages: 92 to 98

Copyright: Copyright (c) to authors, 2010. Used with permission.

Publication date: April 6, 2011

Published in: journal

ISSN: 1942-261x
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