为了推进宫颈癌诊断,我们提出了一种最先进的无标记电化学免疫传感器,设计用于同时检测多种生物标志物蛋白(p16INK4a,p53和Ki67)。该免疫传感器是使用聚乙烯亚胺涂覆的金纳米颗粒/2D二硫化钨/氧化石墨烯(PEI-AuNP/2DWS2/GO)复合修饰的三丝网印刷碳电极(3SPCE)阵列构建的。2DWS2/GO混合提供了一个大的比表面积支持良好分散的PEI-AuNP和吸附的氧化还原活性物质,提高整体性能。PEI-AuNP修饰的2DWS2/GO复合材料不仅提高了电极电导率,而且增加了抗体负载能力。氧化还原活性物种,包括Cd2+离子,2,3-二氨基吩嗪(DAP),和亚甲蓝(MB),作为不同的信号化合物来定量检测宫颈癌生物标志物P16INK4a,分别为p53和Ki67。此外,免疫传感器显示了高灵敏度的检测,良好的储存稳定性,高选择性,和可接受的再现性。该免疫传感器显示出与蛋白质浓度对数的良好线性关系。此外,免疫传感器还显示出高灵敏度,良好的储存稳定性,高选择性,和可接受的再现性。我们的有希望的结果以及免疫传感器在检测人血清中三种肿瘤标志物中的成功应用,突显了其在宫颈癌临床诊断中的潜力。
To advance cervical cancer diagnostics, we propose a state-of-the-art label-free electrochemical immunosensor designed for the simultaneous detection of multiple biomarker proteins (p16INK4a, p53, and Ki67). This immunosensor is constructed using a polyethyleneimine-coated gold nanoparticles/2D tungsten disulfide/graphene oxide (PEI-AuNPs/2D WS2/GO) composite-modified three-screen-printed carbon electrode (3SPCE) array. The 2D WS2/GO hybrid provides a large specific surface area for supporting well-dispersed PEI-AuNPs and adsorbed redox-active species, enhancing overall performance. The PEI-AuNPs-decorated 2D WS2/GO composite not only improves electrode conductivity but also increases the antibody loading capacity. Redox-active species, including Cd2+ ions, 2,3-diaminophenazine (DAP), and methylene blue (MB), serve as distinct signaling compounds to quantitatively detect the cervical cancer biomarkers p16INK4a, p53, and Ki67, respectively. Additionally, the immunosensor demonstrates the detection with high sensitivity, good storage stability, high selectivity, and acceptable reproducibility. This immunosensor demonstrates a good linear relationship with the logarithm of protein concentrations. Additionally, the immunosensor also demonstrates high sensitivity, good storage stability, high selectivity, and acceptable reproducibility. Our promising results and the successful application of the immunosensor in detecting three tumor markers in human serum highlight its potential for clinical diagnosis of cervical cancer.