Methods and kits for detecting a target cell
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Abstract
The present invention concerns the identification of specific target cells in whole blood. The present invention discloses methods for detecting and optionally quantifying a target cell in untreated or substantially untreated whole blood. The present invention further discloses kits for detecting and optionally quantifying a target cell in untreated or substantially untreated whole blood.
66 Citations
70 Claims
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1-46. -46. (canceled)
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47. A kit for detecting a target cell in a sample of untreated or substantially untreated whole blood, comprising a solid substrate, wherein
said target cell is selected from the group consisting of erythrocytes, lymphocytes, monocytes, megakaryocytes, granulocytes, hematopoietic stem cells, hematopoietic progenitor cells, dendritic cells, Langerhans cells, epithelial cells, fibroblasts, metastatic cancer cells, and circulating fetal cells; -
said untreated or substantially untreated whole blood has not been treated for erythrocyte lysis;
said untreated or substantially untreated whole blood has not been subjected to cell concentration, centrifugation, filtration, buffy coat preparation, plasma removal, serum removal, or isolation of a group of cells;
said solid substrate comprises;
a multi-layered composition comprising;
polyanion layers and polycation layers in an alternating arrangement substantially parallel to the surface of said solid substrate;
a high affinity binding pair, said high affinity binding pair selected from the group consisting of avidin and biotin, protein A and immunoglobulin, protein G and immunoglobulin, protein L and immunoglobulin, and a ligan-receptor pair; and
a specific binding agent that specifically binds said target cell, wherein said specific binding agent is bound to said solid substrate by a non-covalent binding reaction, and wherein said specific binding agent is selected from the group consisting of antibodies, antibody fragments, antigen-binding sites of antibodies, antigens, ligands, and receptors; and
said detecting is by optical methods.
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- 48. The kit of claim 48, wherein said detecting permits quantifying said target cells bound to said solid substrate.
- 61. The kit of claim 61, wherein said chamber is of known dimensions.
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68. The kit of claim 68, wherein the top polyionic layer of said multi-layered composition is covalently bound to said first member of said high affinity binding pair.
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70. The kit of claim 70 wherein the top polyionic layer of said multi-layered composition is covalently bound to said one unit of the first member of said high affinity binding pair.
Specification