This CLIA is designed, developed, and produced for the quantitative measurement of human pepsinogen I level in serum samples. The assay utilizes a two-site “sandwich” technique with two antibodies that bind to different epitopes of pepsinogen I.
Assay calibrators, controls, or patient samples are added directly to a reaction vessel containing streptavidin coated magnetic particles. Simultaneously, an acridinium ester antibody and a biotin antibody are added. The magnetic particles capture the biotin antibody as well as an immuno complex in the form of “magnetic particles – biotin pepsinogen I antibody – pepsinogen I – acridinium ester pepsinogen I antibody”.
The materials bound to the solid phase are held in a magnetic field while unbound materials are washed away. Then, the trigger solution is added to the reaction vessel and light generated by the reaction is measured with the ECL100 or ECL-25 analyzer. The relative light units (RLU) are proportional to the concentration of pepsinogen I in the sample. The amount of analyte in the sample is determined from a stored, multi-point calibration curve and reported in serum pepsinogen I concentration.