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- W2617777445 abstract "The development of a portable testing device for detecting Human Salivary α-Amylase (HSA) is very timely since such an enzyme is a valuable biomarker for diagnosing many diseases and monitoring the human stress. We show that an easy-to-use and robust device like the Quartz-Crystal Microbalance (QCM) can be a suitable platform for HSA sensing with a limit of detection of 1 µg/mL (77 U/L). The functionalization of the gold surface is realized by the Photochemical Immobilization Technique (PIT), a powerful and simple method based on an appropriate UV-activation of antibodies. The resulting QCM-based immunosensor allows one to detect HSA in saliva by simple dilution and one-step protocol, whereas the measurement of HSA content in body fluids like urine and serum could be carried out by introducing an additional step consisting of analyte ballasting through the formation of sandwich complexes, which pushes the limit of detection to less than 10 U/L. The validation of the one-step protocol with a standard laboratory method like Phadebas test demonstrates the reliability of the proposed immunosensors, which can be applied to the amylase concentration in body fluids like blood serum and urine for which the physiological level is above 20 U/L." @default.
- W2617777445 created "2017-06-05" @default.
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- W2617777445 date "2017-11-01" @default.
- W2617777445 modified "2023-09-24" @default.
- W2617777445 title "Flexible immunosensor for the detection of salivary α-amylase in body fluids" @default.
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- W2617777445 doi "https://doi.org/10.1016/j.talanta.2017.05.075" @default.
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