Patent ID: 8796039
Filing Date: 2014-08-05
Classification: G01N

Abstract:
1. A method for detecting a test substance in a body fluid sample, comprising (1) immobilizing either a test substance or a ligand on a solid support; (2) contacting the test substance, which is contained in the body fluid sample, and the ligand for a given period of time in the presence and absence of a receptor for the ligand, wherein the test substance is an antibody against the ligand; (3) detecting the binding between the test substance and the ligand; and (4) comparing the level of binding between the test substance and the ligand in the presence and absence of the receptor, wherein the test substance has an inhibitory activity on binding between the ligand and the receptor if the level of binding between the test substance and the ligand in the presence of the receptor is lower than the level of binding between the test substance and the ligand in the absence of the receptor.