Devices and methods for magnetic enrichment of cells and other particles
First Claim
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1. A device for producing a sample enriched in a first cell or component thereof relative to a second component, said device comprising:
- (a) a channel through which said first cell or component flows; and
(b) a magnet that produces a magnetic field of between 0.05 and 5.0 Tesla and a magnetic field gradient of between 100 Tesla/m and 1,000,000 Tesla/m in said channel.
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Abstract
The invention features devices and methods for the enrichment of cells and other desired analytes by employing a magnetic field, alone or in conjunction with size-based separation. The devices and methods may be advantageously employed to enrich for rare cells, e.g., fetal cells or epithelial cells, present in a sample, e.g., maternal blood.
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Citations
109 Claims
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1. A device for producing a sample enriched in a first cell or component thereof relative to a second component, said device comprising:
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(a) a channel through which said first cell or component flows; and
(b) a magnet that produces a magnetic field of between 0.05 and 5.0 Tesla and a magnetic field gradient of between 100 Tesla/m and 1,000,000 Tesla/m in said channel. - 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, 86)
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47. A method of producing a sample enriched in a first cell or component thereof relative to a second component, said method comprising the steps of:
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(a) contacting a sample comprising said first cell or component with a reagent that alters the magnetic properties of a protein expressed in said first cell or component or said second component of said sample to produce an altered sample;
(b) contacting said altered sample with a channel having a magnet positioned relative to said channel and producing a magnetic field and magnetic field gradient capable of altering the passage of said first cell or component or said second component relative to the other, thereby producing said sample enriched in said first cell or component. - View Dependent Claims (48, 49, 50, 51, 52, 53, 54, 55, 56, 57, 58, 59, 60, 61, 62, 63, 64, 65, 66, 67, 68)
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69. A method for enriching a first analyte from a fluid sample containing said first analyte relative to second and third analytes in said sample, said method comprising:
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(a) performing a first enrichment step to enrich said first analyte from said fluid sample based on hydrodynamic size using a plurality of obstacles that direct said first analyte in a first direction and said second analyte in a second direction, and (b) performing a second enrichment step to enrich said first analyte from said fluid sample based on an intrinsic or extrinsic magnetic property of said first or third analyte. - View Dependent Claims (70, 71, 72, 73, 74, 75, 76, 77, 78, 79, 80, 81, 82, 83, 84, 85, 87, 88, 89, 90, 91, 92, 93)
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94. A system comprising a first module comprising (a) an array of obstacles that selectively directs one or more first analytes having a hydrodynamic size greater than a critical size in a first direction towards a first outlet and one or more second analytes having a hydrodynamic size smaller than said critical size in a second direction towards a second outlet;
(b) a second module comprising a channel for receiving said one or more first analytes from said first outlet; and
(c) a magnet that generates a magnetic field and magnetic field gradient in said channel to alter passage of said one or more first analytes.- View Dependent Claims (95, 96, 97, 98, 99, 100, 101, 102, 103, 104)
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105. A system comprising (a) a flow-through channel comprising a two dimensional array of obstacles that selectively directs one or more first analytes having a hydrodynamic size greater than a critical size in a first direction towards a first outlet and one or more second analytes having a hydrodynamic size less than a critical size in a second direction towards a second outlet;
- and (b) a magnet that generates a magnetic field and magnetic field gradient to alter the passage of said one or more first analytes.
- View Dependent Claims (106, 107, 108, 109)
Specification