MONOCLONAL ANTIBODY RECOGNIZING FK506-BINDING PROTEIN, METHOD OF ASSAYING FK506-BINDING PROTEIN LEVEL, AND KIT THEREOF.

摘要

The invention relates to a monoclonal antibody (anti-FKBP antibody) which recognizes an antigenic determinant present in an FK506-binding protein (FKBP) and does not inhibit the binding between FKBP and FK506, a method of assaying a plasma FKBP level which comprises reacting an immobilized anti-FKBP antibody with an enzyme-labelled FK506 and FKBP present in a specimen and determining the extent of color development of the enzyme-substrate complex formed thereby, and a kit therefor. The invention serves to facilitate a more accurate assay of a plasma FKBP level which affects the immunosuppressive activity of FK506, whereby the optimal FK506 dose can be determined in close accordance with the condition of each individual patient.