期刊
PROCESSES
卷 9, 期 12, 页码 -出版社
MDPI
DOI: 10.3390/pr9122203
关键词
antibody; cyclic voltammetry; electrochemical immunosensor; osmium telluride quantum dots; polypyrrole; prostate specific antigen
资金
- National Research Foundation (NRF) of South Africa [85102]
Prostate cancer is a major global threat, with PSA serving as a potential biomarker for early diagnosis. An extremely sensitive electrochemical immunosensor was developed with a detection limit of 0.36 ng/mL, making it suitable for clinical applications.
Prostate cancer is a dominant global threat to society. It affects nearly 4000 men in South Africa annually, making it the second most threatening cancerous disease after lung cancer. A potential serological biomarker to monitor early diagnosis of prostate cancer is prostate specific antigen (PSA). We used the PSA biomarker in our work to develop an extremely sensitive electrochemical immunosensor to achieve low detection limits. The fabrication steps followed with the combination of thioglycolic acid capped osmium telluride quantum dots (TGA-OsTe(2)QD)-polypyrrole (PPy) nanocomposite and prostate specific antigen modified on a glassy carbon electrode. The UV-Vis signatures of TGA-OsTe(2)QD-PPy showed an absorption band at 262 nm which is attributed to the PPy and TGA-OsTe(2)QD composite. This band corresponds to the energy band gap of 4.4 and 5.4 eV. The CV responses of BSA|Ab|TGA-OsTe(2)QD|PPy|GCE modified electrode to prostate specific antigen (PSA) was studied within a range of 0-16 ng/mL PSA that was linear, herein referred to as liner range (LR), which produced a limit of detection (LOD) value of 0.36 ng/mL PSA. The values of the immunosensor's calibration parameters (LR and LOD) make them suitable for real sample application, due to their coverage of the PSA concentration range (0-14 ng/mL) that is of clinical importance.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据