Increased sensitivity of proximity ligation assays
First Claim
1. A method for enhancing the sensitivity of a proximity ligation assay, comprising detecting and/or quantitating one or more proteins in a sample by detecting and/or quantitating one or more protein specific amplification products comprising separating at least one protein specific amplification product from a mixture of amplification products by size, wherein the mixture of amplification products is formed by amplification of a ligated probe formed when at least two different proximity probes each specifically bind the same analyte and a connector oligonucleotide binds to each of the at least two different proximity probes.
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Abstract
Methods for enhancing the sensitivity of proximity ligation assays are provided herein. The methods make use of size separation methods, control of oligonucleotide size, and control of reaction conditions, to improve the assay sensitivity. Kits for performing the assay are also described.
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Citations
23 Claims
- 1. A method for enhancing the sensitivity of a proximity ligation assay, comprising detecting and/or quantitating one or more proteins in a sample by detecting and/or quantitating one or more protein specific amplification products comprising separating at least one protein specific amplification product from a mixture of amplification products by size, wherein the mixture of amplification products is formed by amplification of a ligated probe formed when at least two different proximity probes each specifically bind the same analyte and a connector oligonucleotide binds to each of the at least two different proximity probes.
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16-22. -22. (canceled)
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23. A method for enhancing the sensitivity of a proximity ligation assay, comprising detecting and/or quantitating one or more analytes in a sample by detecting and/or quantitating one or more analyte specific amplification products comprising separating at least one analyte specific amplification product from a mixture of amplification products by size, wherein the mixture of amplification products is formed by amplification of a ligated probe formed when at least two different proximity probes each specifically bind the same analyte and a connector oligonucleotide binds to each of the at least two different proximity probes, wherein the one or more analytes can be detected and/or quantitated in the samples at a concentration of 0.05 pg/ml to 50 ng/ml.
Specification