METHODS AND MATERIALS FOR THE IMMUNOASSAY OF APOLIPOPROTEIN(a) AND LIPOPROTEIN(a)

摘要

The present invention relates to monoclonal antibodies and a method for the quantification of apolipoprotein(a) and lipoprotein(a) present in human body fluids. The method is not sensitive to the presence of plasminogen or the apo(a) kringle 4 repeats. The assay involves the addition of the test sample to an immobilized anti-apo(a) antibody and forming a first immobilized complex of apolipoprotein(a)/anti-apo(a) first antibody, contacting first immune complex with an anti-apo(a) monoclonal antibody specific for apo(a) with non crossreactivity to plasminogen and which does not identify the kringle 4 type 2 apo(a) repeats and thereafter quantitating apo(a) based on the amount of bound anti-apo(a) monoclonal antibody. Immobilized goat or rabbit anti-human apo(a) antibody can be employed as the first capture antibody and the mouse anti-apo(a) monoclonal antibody as second antibody. The amount of anti-apo(a) monoclonal antibody bound is quantitated through binding of a third antibody enzyme conjugant, e.g., goat anti-mouse antibody/horseradish peroxidase (HRP) conjugate, followed by reaction with a suitable substrate such as o-phenylenediamine dihydrochloride.