NMR device for detection of analytes
First Claim
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1. A device configured for detection of an analyte using NMR comprising:
- a support defining one or more wells for holding a liquid sample;
an RF coil, anddisposed on said support, for reconstitution within said one or more wells, dried superparamagnetic particles having binding moieties linked thereto, wherein said binding moieties are operative to alter an aggregation of said magnetic particles in said liquid sample as a function of the presence or concentration of an analyte in said liquid sample and said RF coil configured to detect an echo response produced by exposing said liquid sample in said well to a bias magnetic field created using one or more magnets and an RF excitation.
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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.
119 Citations
18 Claims
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1. A device configured for detection of an analyte using NMR comprising:
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a support defining one or more wells for holding a liquid sample; an RF coil, and disposed on said support, for reconstitution within said one or more wells, dried superparamagnetic particles having binding moieties linked thereto, wherein said binding moieties are operative to alter an aggregation of said magnetic particles in said liquid sample as a function of the presence or concentration of an analyte in said liquid sample and said RF coil configured to detect an echo response produced by exposing said liquid sample in said well to a bias magnetic field created using one or more magnets and an RF excitation. - View Dependent Claims (2, 3, 4, 5)
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- 6. A device configured for detection of an analyte using NMR comprising a support defining one or more wells for holding a liquid sample, said sample comprising magnetic particles and an analyte, said magnetic particles having binding moieties linked thereto, wherein said binding moieties are operative to alter an aggregation of said magnetic particles in said liquid sample as a function of the presence or concentration of said analyte in said liquid sample, and wherein at least one of said wells has a varying cross section such that, in the presence of a magnetic field, aggregations of said particles move from an area of larger cross section to an area of smaller cross section, thereby concentrating said analyte carried with said aggregations.
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11. A method of measuring one or more analytes in a sample comprising:
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obtaining a sample for measuring one or more analytes; and measuring the presence of the one or more analytes in the sample using a device configured for detection of an analyte using NMR, the device comprising; a support defining one or more wells for holding a sample and magnetic particles, the magnetic particles having binding moieties linked thereto, wherein said binding moieties are operative to alter an aggregation phenomena of the magnetic particles in the sample as a function of the presence or concentration of analyte in said sample; and an RF coil disposed about each of the one or more wells, said RF coil configured to detect an echo response produced by exposing the sample to a bias magnetic field created using one or more magnets and an RF excitation; wherein an echo response detected from the sample exposed to the bias magnetic field and RF excitation is indicative of detection of the one or more analytes in the sample, thereby measuring the presence of the one or more analytes. - View Dependent Claims (12, 13)
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14. A device configured for detection of an analyte using NMR, said device comprising a plurality of wells for holding a liquid sample comprising magnetic particles and said analyte, said magnetic particles having binding moieties linked thereto, and, for each of said wells:
- an RF coil disposed about said well, said RF coil configured to detect an echo response produced by exposing said liquid sample in said well to a bias magnetic field created using one or more magnets and an RF excitation.
- View Dependent Claims (15, 16, 17, 18)
Specification