Sandwich assays in droplets
First Claim
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1. A method for measuring the quantity of target analytes, the method comprising:
- forming a plurality of fluidic compartmentalized portions, each comprising;
a target analyte from a sample, a first binding agent specific for a first binding region on the target analyte and comprising a target identifier, and a second binding agent specific for a second binding region on the target analyte, wherein the second binding agent comprises a functionalized portion for immobilization to a solid support;
producing in the one or more compartmentalized portions, one or more complexes each comprising the first and second binding agents bound to the target analyte;
disrupting and releasing contents of the plurality of compartmentalized portions;
immobilizing the one or more complexes on a solid support through the functionalized portion of the second binding agent to form one or more immobilized complexes;
separating the immobilized complexes from the other released contents; and
detecting the target identifiers of the separated immobilized complexes, thereby identifying the quantity of the target analyte.
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Abstract
The invention generally relates to performing sandwich assays in droplets. In certain embodiments, the invention provides methods for detecting a target analyte that involve forming a compartmentalized portion of fluid including a portion of a sample suspected of containing a target analyte and a sample identifier, a first binding agent having a target identifier, and a second binding agent specific to the target analyte under conditions that produce a complex of the first and second binding agents with the target analyte, separating the complexes, and detecting the complexes, thereby detecting the target analyte.
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Citations
77 Claims
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1. A method for measuring the quantity of target analytes, the method comprising:
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forming a plurality of fluidic compartmentalized portions, each comprising; a target analyte from a sample, a first binding agent specific for a first binding region on the target analyte and comprising a target identifier, and a second binding agent specific for a second binding region on the target analyte, wherein the second binding agent comprises a functionalized portion for immobilization to a solid support; producing in the one or more compartmentalized portions, one or more complexes each comprising the first and second binding agents bound to the target analyte; disrupting and releasing contents of the plurality of compartmentalized portions; immobilizing the one or more complexes on a solid support through the functionalized portion of the second binding agent to form one or more immobilized complexes; separating the immobilized complexes from the other released contents; and detecting the target identifiers of the separated immobilized complexes, thereby identifying the quantity of the target analyte. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 45, 46, 47, 51, 52, 53, 54, 55, 72, 73, 74, 75)
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23. A method for a determining a number of a target nucleic acid, the method comprising:
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forming a plurality of fluidic compartmentalized portions, each comprising; a sample containing a target nucleic acid, wherein the target nucleic acid comprises a binding region and a second binding region, and a first binding agent specific for the first binding region on the target nucleic acid and comprising a target identifier, and a second binding agent specific for the second binding region on the target nucleic acid, wherein the second binding agent comprises a functionalized portion for immobilization to a solid support; producing in the one or more compartmentalizing portions, one or more complexes each comprising the first and second binding agents bound to the target nucleic acid; disrupting and releasing contents of the plurality of compartmentalized portions; immobilizing the one or more complexes on a solid support through the functionalized portion of the second binding agent to form one or more immobilized complexes; separating each immobilized complex fromt the other released contents; and detecting the target identifiers of the separated immobilized complexes, thereby identifying the target nucleic acid. - View Dependent Claims (24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 39, 40, 41, 42, 43, 44, 56, 57, 67, 68, 69, 70, 71)
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34. A method for identifying a number of target biological molecules, the method comprising:
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forming a plurality of fluidic compartmentalized portions, each comprising; a portion of a sample suspected of containing a target biological molecule and unspecific analytes, wherein the target biological molecule comprises a first binding region and a second binding region, a first binding agent specific for the first binding region on the target biological molecule and comprising a target identifier, and a second binding agent specific for the second binding region on the target biological molecule, and a competitive inhibitor specific to the unspecific analytes, wherein the second binding agent comprises a functionalized portion for immobilization to a solid support producing in the one or more compartmentalizing portions, one or more complexes each comprising the first and second binding agents bound to the target molecule; disrupting and releasing contents of the plurality of compartmentalized portions; immobilizing the one or more complexes on a solid support through the functionalized portion of the second binding agent to form one or more immobilized complexes; separating the immobilized complexes from the other released contents; and detecting the target identifiers of the separated immobilized complexes, thereby identifying the target biological molecules. - View Dependent Claims (35, 36, 37, 38, 48, 49, 50, 58, 59, 60, 61, 62, 63, 64, 65, 66, 76, 77)
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Specification