High Sensitive Detection of Prostate Specific Antigen by Using Ferrocene Cored Asymmetric PAMAM Dendrimer Interface Screen Printed Electrodes. Issue 1 (30th October 2018)

• Record Type: Journal Article
• Authors: Cevik, Emre
• Is Part Of: Electroanalysis. Volume 31:Issue 1(2019)
• Page Start: 31
• Page End: 39
• Publication Date: 2018-10-30
• Subjects: Prostate cancer -- prostate specific antigen -- ferrocene -- PAMAM dendrimer -- screen printed electrode -- immunosensor; Electrochemical analysis -- Periodicals; Chemistry, Analytical -- Periodicals; Electrochemistry -- Periodicals; 543.4
• DOI: 10.1002/elan.201800440
• Languages: English
• ISSNs: 1040-0397

Abstract

Abstract: In this study, electrochemical immunosensors were developed for the detection of prostate specific antigen (PSA) using ferrocene (Fc) and polyamidoamine dendrimer (PAMAM) constructs. The biosensor fabrication was designed by modifying the screen‐printed gold electrode (Au) with ferrocene cored dendrimers (FcPAMAM) synthesized in three different generations. The self‐assembled monolayer principle was followed, to obtain sensitive, selective and disposable electrodes. Therefore, the Au electrodes were modified with cysteamine (Cys) to obtain a functional surface for FcPAMAM dendrimers to bind. Dendrimer generations were attached to this surface using a cross‐linker (glutaraldehyde) so that a suitable surface was obtained for binding of biological components. The Monoclonal PSA antibody (anti‐PSA) was immobilized on the Au electrode surface which coated with dendrimer, and (Au/Cys/FcPAMAM/anti‐PSA) biosensing electrode was obtained. The PSA detection performances of electrochemical impedance spectroscopy (EIS) and Amperometry based immunosensors exhibited very low detection limits; 0.001 ng mL −1 and 0.1 pg mL −1, respectively. In addition, EIS and Amperometry based biosensors using Au/Cys/FcPAMAM/anti‐PSA sensing electrode were represented excellent linear ranges of 0.01 ng mL −1 to 100 ng mL −1 and 0.001 ng mL −1 to 100 ng mL −1 . In order to determine the applicability recovery and selectivity tests were performed using three different proteins in human serum. Abstract :