Development of an SPR imaging biosensor for determination of cathepsin G in saliva and white blood cells

Cathepsin G (CatG) is an endopeptidase that is associated with the early immune response. The synthetic compound cathepsin G inhibitor I (CGI-I) was tested for its ability to inhibit the activity of CatG via a new surface plasmon resonance imaging assay. CGI-I was immobilized on the gold surface of...

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Detalles Bibliográficos
Autores principales: Gorodkiewicz, Ewa, Regulska, Elżbieta, Wojtulewski, Kazimierz
Formato: Texto
Lenguaje:English
Publicado: Springer Vienna 2011
Materias:
Original Paper
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3092066/
https://www.ncbi.nlm.nih.gov/pubmed/21660086
http://dx.doi.org/10.1007/s00604-011-0569-4
Descripción
Sumario:Cathepsin G (CatG) is an endopeptidase that is associated with the early immune response. The synthetic compound cathepsin G inhibitor I (CGI-I) was tested for its ability to inhibit the activity of CatG via a new surface plasmon resonance imaging assay. CGI-I was immobilized on the gold surface of an SPR sensor that was first modified with 1-octadecanethiol. A concentration of CGI-I equal to 4.0 μg·mL-1 and a pH of 8.0 were found to give the best results. The dynamic response of the sensor ranges from 0.25 to 1.5 ng·mL-1, and the detection limit is 0.12 ng·mL-1. The sensor was applied to detect CatG in human saliva and white blood cells. [Figure: see text]

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