NMR device for detection of analytes
First Claim
1. A device for the magnetic resonance detection of one or more analytes in a liquid sample, the device comprising a support defining a well holding a liquid sample comprising magnetic particles and the one or more analytes and having an RF coil disposed about the well, the RF coil configured to detect an echo response produced by exposing the liquid sample to a bias magnetic field created using one or more magnets and an RF excitation, wherein the magnetic particles have binding moieties on their surfaces, the binding moieties operative to alter an aggregation of the magnetic particles in the presence of the one or more analytes, and wherein at least one of the binding moieties is operative to bind to at least one of the following:
- (i) the one or more analytes;
(ii) another of the binding moieties; and
(iii) an aggregation-inducing molecule in the liquid sample, thereby producing an aggregate of multiply-linked magnetic particles as a function of the presence or concentration of the one or more analytes in the liquid sample.
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Accused Products
Abstract
This invention relates generally to detection devices having one or more small wells each surrounded by, or in close proximity to, an NMR micro coil, each well containing a liquid sample with magnetic nanoparticles that self-assemble or disperse in the presence of a target analyte, thereby altering the measured NMR properties of the liquid sample. The device may be used, for example, as a portable unit for point of care diagnosis and/or field use, or the device may be implanted for continuous or intermittent monitoring of one or more biological species of interest in a patient.
89 Citations
64 Claims
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1. A device for the magnetic resonance detection of one or more analytes in a liquid sample, the device comprising a support defining a well holding a liquid sample comprising magnetic particles and the one or more analytes and having an RF coil disposed about the well, the RF coil configured to detect an echo response produced by exposing the liquid sample to a bias magnetic field created using one or more magnets and an RF excitation, wherein the magnetic particles have binding moieties on their surfaces, the binding moieties operative to alter an aggregation of the magnetic particles in the presence of the one or more analytes, and wherein at least one of the binding moieties is operative to bind to at least one of the following:
- (i) the one or more analytes;
(ii) another of the binding moieties; and
(iii) an aggregation-inducing molecule in the liquid sample, thereby producing an aggregate of multiply-linked magnetic particles as a function of the presence or concentration of the one or more analytes in the liquid sample. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 36, 37, 38, 39, 40, 41, 42, 43, 44, 45, 46, 47, 48, 49, 50, 51, 52, 53, 54, 55, 56, 57, 58, 59, 60, 61, 62, 63, 64)
- (i) the one or more analytes;
Specification