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Preliminary study of real-time fiber optic based protein C biosensor by James O. Spiker; Kyung A. Kang is a Biochemistry, Genetics and Molecular Biology article available to read on EtoBox.

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Deficiency of protein C (PC), one of the human body's key anticoagulants, can lead to massive thrombotic complications. There is a diagnostic need to perform real-time assays, in order to quickly identify and treat this disease. An immuno-optical biosensor for the diagnosing of PC deficiencies and monitoring of PC concentrations is being developed for this purpose. Monoclonal antibody against PC (anti-PC) is immobilized on the surface of a tapered quartz fiber that is enclosed in a glass tube (capacity approximately 200 microL). Following sample injection, PC within a sample binds to the anti-PC in a highly specific reaction. The system is then probed with a fluorophore-tagged secondary antibody against PC. Excitation light is applied through the fiber, and the fluorescence intensity is correlated with the PC concentration in the sample. This study presents (1) a feasibility, direct binding assay, (2) a comparison of methods to immobilize anti-PC upon the fiber (direct immobilization vs an avidin-biotin bridge), and (3) effectiveness of an elution step to regenerate the fiber. PC-deficient patients typically have a concentration range less than 2.5 microg/mL. It was found that the

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Author

James O. Spiker; Kyung A. Kang

Publisher

John Wiley and Sons; Wiley (John Wiley & Sons); Wiley - V C H Verlag GmbbH & Co.; Wiley (ISSN 0006-3592)

Published

1999

Language

EN

Field

Biochemistry, Genetics and Molecular Biology (Life Sciences)