Methods and apparatus for use in detection and quantitation of various cell types and use of optical bio-disc for performing same
First Claim
Patent Images
1. A method of detecting and quantifying a cell type of interest among various types of cells, said method comprising the steps of:
- providing a test sample having target cells, said target cells having a common surface marker, said target cells including a first cell type having a first surface marker and a second cell type having a second surface marker;
providing a bio-disc, said bio-disc comprising a substantially circular substrate having a center and an outer edge, a target zone disposed between said center and said outer edge, a plurality of capture antibodies bound to said substantially circular substrate within said target zone such that said plurality of capture antibodies are immobilized in said target zone, said plurality of capture antibodies having affinity for said common surface marker on said target cells;
depositing said test sample on said target zone;
allowing said target cells including said first and second type cells present in said test sample to bind with said plurality of capture antibodies through said common surface marker;
washing said target zone to remove any unbound cells;
providing a reporter agent having a signal antibody bound thereto, said signal antibody having specific affinity to said first surface marker;
depositing said reporter agent on said target zone;
allowing said signal antibody to bind to said first surface marker on said first cell type in said target zone to thereby tag said first cell type;
washing the target zone to remove any unbound reporter agent; and
scanning a beam of electromagnetic radiation over said target zone to thereby determine the number of tagged first cell type cells and untagged second cell type cells.
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Abstract
Methods and apparatus for conducting differential cell counts including leukocytes and use of optical bio-discs for performing such cell counts is disclosed. The bio-disc includes a substantially circular substrate having a center and an outer edge, an active layer associated with the substrate; a target zone disposed between the center and the outer edge; and a plurality of capture antibodies bound to the active layer such that the antibodies are immobilized on the active layer in the target zone.
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Citations
54 Claims
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1. A method of detecting and quantifying a cell type of interest among various types of cells, said method comprising the steps of:
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providing a test sample having target cells, said target cells having a common surface marker, said target cells including a first cell type having a first surface marker and a second cell type having a second surface marker;
providing a bio-disc, said bio-disc comprising a substantially circular substrate having a center and an outer edge, a target zone disposed between said center and said outer edge, a plurality of capture antibodies bound to said substantially circular substrate within said target zone such that said plurality of capture antibodies are immobilized in said target zone, said plurality of capture antibodies having affinity for said common surface marker on said target cells;
depositing said test sample on said target zone;
allowing said target cells including said first and second type cells present in said test sample to bind with said plurality of capture antibodies through said common surface marker;
washing said target zone to remove any unbound cells;
providing a reporter agent having a signal antibody bound thereto, said signal antibody having specific affinity to said first surface marker;
depositing said reporter agent on said target zone;
allowing said signal antibody to bind to said first surface marker on said first cell type in said target zone to thereby tag said first cell type;
washing the target zone to remove any unbound reporter agent; and
scanning a beam of electromagnetic radiation over said target zone to thereby determine the number of tagged first cell type cells and untagged second cell type cells. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. A method of making an optical bio-disc for detection of various types of cells in a sample, said method comprising the steps of:
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providing a substrate having a center and an outer edge;
encoding information on an information layer associated with said substrate, said encoded information being readable by a disc drive assembly to control rotation of said disc;
forming a target zone on said substrate between said center and said outer edge;
applying an active layer in said target zone; and
depositing within said target zone, a plurality of capture antibodies, at least some of said capture antibodies attaching to said active layer to thereby become immobilized within said target zone. - View Dependent Claims (10, 11, 12, 13, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 36, 37, 38)
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14. A method of detecting and quantifying a cell type in a test sample having various types of cells, said method comprising the steps of:
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providing a bio-disc including a substantially circular substrate having a center and an outer edge, a target zone disposed between the center and the outer edge, a plurality of capture antibodies bound to said substrate within said target zone such that said plurality of capture antibodies are immobilized in said target zone, said plurality of capture antibodies having affinity for a common antigen among said various types of cells;
depositing said test sample on said target zone;
allowing said plurality of capture antibodies to bind with said common antigen to immobilize said various types of cells in said target zone;
washing said target zone to remove unbound cells;
providing at least one group of signal antibodies, each antibody thereof having attached thereto a reporter agent unique for said group, each group of signal antibodies having affinity to one cell type among the various types of cells immobilized in said target zone;
allowing said at least one group of signal antibodies to bind to its respective cell type to thereby tag said respective cell type;
washing said target zone to remove unbound signal antibodies; and
scanning a beam of electromagnetic radiation over said target zone to thereby determine the number of untagged cells and cells tagged with said at least one group of signal antibodies.
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15. An optical bio-disc for detecting a cell type among various cell types in a sample, said optical bio-disc comprising:
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a substantially circular substrate having a center and an outer edge;
an active layer associated with said substrate;
a target zone disposed between said center and said outer edge; and
a plurality of capture antibodies bound to said active layer such that said antibodies are immobilized on said active layer in said target zone. - View Dependent Claims (16, 17, 18, 19, 20, 21, 22, 23, 24, 25)
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39. A method of detecting and quantitating target cells in a test sample, said method comprising the steps of:
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providing a bio-disc, said bio-disc comprising a substantially circular substrate having a center and an outer edge, an active layer associated with said substrate, a target zone disposed between said center and said outer edge, at least one capture antibody bound to said active layer such that said capture antibody is immobilized on said active layer in said target zone, said capture antibody having affinity to said target cell;
depositing said test sample on said target zone;
allowing any target cell present in said test sample to bind with said capture antibody;
washing said target zone to remove any unbound cells;
providing a plurality of signal antibodies, each signal antibody having an affinity agent that binds to a binding agent;
allowing said signal antibodies to bind to any target cell that have antigens recognized by said signal antibodies to thereby tag any target cell;
washing said target zone to remove any unbound signal antibodies;
providing a plurality of reporter agents, each reporter agent having one or more binding agents;
allowing said reporter agents to bind to any signal antibody bound to any target cell in said target zone;
washing said target zone to remove any unbound reporter agents; and
scanning a beam of electromagnetic radiation over said target zone and analysing a return beam to thereby determine the number of tagged and untagged cells. - View Dependent Claims (40, 41, 42, 43, 44, 45, 46, 47, 48, 49, 50)
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51. A method of detecting and quantifying a target cell, said method comprising the steps of:
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providing a bio-disc including a substantially circular substrate having a center and an outer edge, a target zone disposed between the center and the outer edge, an affinity agent bound to said substrate within said target zone such that said affinity agent is immobilized in said target zone;
providing a sample containing said target cell, said target cell having a surface marker;
mixing a reporter agent with said sample, said reporter agent having attached thereto a capture antibody and a binding agent, said capture antibody having affinity to said surface marker, said binding agent having affinity to said affinity agent;
allowing said capture antibody to bind with said surface marker on said target cell to thereby tag said target cell with said reporter agent, depositing said sample with said tagged target cell on said target zone;
allowing said binding agent attached to said reporter agent to bind with said affinity agent to immobilize said target cell in said target zone;
washing said target zone to remove unbound cells; and
scanning a beam of electromagnetic radiation over said target zone to thereby determine the number of cells tagged with said reporter agent. - View Dependent Claims (52, 53, 54)
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Specification