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Injection of Syngeneic Murine Melanoma Cells to Determine Their Metastatic Potential in the Lungs
Published on: May 24, 2016
Determination of Cadherin-17 in Tumor Tissues of Different Metastatic Grade Using a Single Incubation-Step
Alejandro Valverde1, Eloy Povedano1, Víctor Ruiz-Valdepeñas Montiel1
1Departamento de Química Analítica , Universidad Complutense de Madrid , E-28040 Madrid , Spain.
Abstract:
This paper reports the development of an amperometric immunosensing platform for the determination of cadherin-17 (CDH-17), an atypical adhesion protein involved in the progression, metastatic potential, and survival of high prevalence gastric, hepatocellular, and colorectal tumors. The methodology developed relies on the efficient capture and enzymatic labeling of the target protein on the magnetic microparticles (MBs) surface using commercial antibodies and amperometric transduction at screen-printed carbon electrodes (SCPEs) through the HRP/H2O2/HQ system. The developed immunosensing platform allows the selective determination of the target protein at low ng mL-1 level (LOD of 1.43 ng mL-1) in 45 min and using a single incubation step. The electrochemical immunosensor was successfully used for the accurate determination of the target protein in a small amount (0.5 μg) of raw lysates of colon cancer cells with different metastatic potential as well as in extracts from paraffin embedded cancer colon tissues of different metastatic grade.
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