alexa A novel multi-array immunoassay device for tumor markers based on insert-plug model of piezoelectric immunosensor.
Engineering

Engineering

Journal of Biosensors & Bioelectronics

Author(s): Zhang B, Zhang X, Yan HH, Xu SJ, Tang DH,

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Abstract A novel multi-array immunoassay device based on the insert-plug model of piezoelectric (Pz) immunosensor fabricated with the screw clamp apparatus has been developed for quantitative detection of tumor markers such as alpha-fetoprotein (AFP), carcinoembryonic antigen (CEA), prostate specific antigen (PSA), and carcinoma antigen 125 (CA125) in serum, in which single immunosensor can oscillate independently with the frequency stability of +/-1 Hz (hertz) in air phase and +/-2 Hz in liquid phase. These response characteristics of Pz tumor marker multi-array immunoassay device such as time-cost, reproducibility and specificity, etc. were also investigated, respectively. The detection range for AFP, CEA, PSA and CA125 obtained by multi-array Pz immunosensor were 20-640 ng/ml, 1.5-30 microg/ml, 1.5-40 ng/ml and 5-150 IU/ml, respectively, with the coefficient of variance (CV) less than 5\% and no cross-reactivates with other tumor markers in serum were observed. Application of the multi-array immunosensor to clinical samples demonstrated that results were in good agreement with chemiluminescence immunoassay (CLIA). Moreover, the multi-array Pz immunosensor could be regenerated to be reused for three cycles without appreciable loss of response activity. Therefore, the proposed multi-array immunoassay device based on Pz immunosensor provides a rapid, sensitive, specific, reusable, convenient and reliable alternative for the detection of tumor markers in clinical laboratory. This article was published in Biosens Bioelectron and referenced in Journal of Biosensors & Bioelectronics

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