Characterization of circulating antibodies with affinity to an epitope used in antibody-conjugated magnetic immunoassays from a case of falsely elevated cyclosporine A

摘要

Background: We report a case demonstrating falsely elevated cyclosporine A (CsA) levels by using the antibody conjugated magnetic immunoassay (ACMIA). To determine the cause of the false positive result, we examined the presence of an interferent in the patient's sample.