METHOD FOR DIGITAL IMMUNOSENSING ON SINGLE MOLECULES USING LABEL IMMOBILIZATION AND AMPLIFICATION STRATEGY

• Main Author: Stengele, Nikolaus-Peter
• Format: Patent
• Language: English
• Published: 02.05.2024
• Subjects: INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIRCHEMICAL OR PHYSICAL PROPERTIES; MEASURING; PHYSICS; TESTING

The present invention relates to diagnostic test and technology. In particular, the present invention relates to a method for determining an analyte suspected to be present in a sample comprising (a) contacting said sample with (i) a first binding agent which is capable of specifically binding to the analyte and which is immobilized on a solid support and (ii) a second binding agent which is capable of specifically binding to the analyte and which is capable of reversibly binding at least one detectable label, wherein said first and/or second binding agent is linked to an linking agent which is capable of covalently binding the at least one reversibly bound detectable label to the solid support when the first and second binding agents are in physical proximity, for a time and under conditions which allow specific binding of the analyte to the first and the second binding agent such that an complex of first binding agent, analyte and second binding agent is formed, and which allow for covalently binding the at least one detectable label to the solid support, and (b) removing the complex of first binding agent, analyte and second binding agent from the solid support such that the solid support having covalently bound the at least one detectable label remains, and (c) detecting the at least one covalently bound detectable label on the solid support whereby the analyte is determined. The present invention also relates to a device for determining an analyte suspected to be present in a sample, to the use of the device of the invention for determining an analyte suspected to be present in a sample in said sample, and to a kit for determining an analyte suspected to be present in a sample.