Magnetically-controllable delivery system for therapeutic agents
First Claim
1. A magnetic delivery system for delivering a magnetizable particle to a location in a body, the magnetic delivery system comprising:
- a magnetizable object, wherein the magnetizable object includes a plurality of segments distributed throughout the magnetizable object and wherein the segments are configured to provide a magnetic gradient for attracting the magnetizable particle; and
wherein the segments further comprise a coating wherein the coating is patterned to provide non-uniform magnetization of a surface of the segments when the magnetizable object is magnetized; and
an external source of a magnetic field capable of (i) magnetizing the magnetizable particle and (ii) increasing a degree of magnetization of the magnetizable object and thereby creating the magnetic gradient.
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Abstract
A magnetic delivery system for delivering a magnetizable particle to a location in a body, the device includes a magnetizable object implanted in the body, wherein the magnetizable object includes a plurality of segments distributed throughout the magnetizable object and wherein the segments are configured to provide a magnetic gradient for attracting the magnetizable particle and an external source of a magnetic field capable of (i) magnetizing the magnetizable particle and (ii) increasing a degree of magnetization of the magnetizable object and thereby creating the magnetic gradient. A drug delivery system including the magnetic delivery system and a magnetizable particle associated with a therapeutic agent and/or a cell. A cell delivery system based on the magnetic delivery system and a magnetizable particle associated with a cell. A method of using the magnetic delivery system for delivery of a therapeutic agent and/or a cell to a targeted location in a body.
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Citations
37 Claims
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1. A magnetic delivery system for delivering a magnetizable particle to a location in a body, the magnetic delivery system comprising:
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a magnetizable object, wherein the magnetizable object includes a plurality of segments distributed throughout the magnetizable object and wherein the segments are configured to provide a magnetic gradient for attracting the magnetizable particle; and wherein the segments further comprise a coating wherein the coating is patterned to provide non-uniform magnetization of a surface of the segments when the magnetizable object is magnetized; and an external source of a magnetic field capable of (i) magnetizing the magnetizable particle and (ii) increasing a degree of magnetization of the magnetizable object and thereby creating the magnetic gradient. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 36)
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13. The magnetic delivery system of chum 12, wherein at least one of the magnetizable object and the magnetizable particle is magnetized only in the presence of the external magnetic field.
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37. The method of chum 36, wherein a size of each segment is selected to be commensurate with a size of the magnetizable particle such that at least one spatial dimension of each segment does not exceed by more than about 10,000 times at least one spatial dimension of the magnetizable particle.
Specification