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One-pot synthesized AuNPs/MoS2/rGO nanocomposite as sensitive electrochemical aptasensing platform for nucleolin detection
Journal of Electroanalytical Chemistry ( IF 4.1 ) Pub Date : 2020-02-01 , DOI: 10.1016/j.jelechem.2020.113868
Xujie Su , Yujie Han , Zhiguang Liu , Lifang Fan , Yujing Guo

Abstract Simple, rapid, sensitive, and specific detection of cancer cells plays a pivotal role in the diagnosis and prognosis of cancer. This paper describes an alternative method for detection of nucleolin, which is a major nucleolar protein, overexpressed in several types of cancer, and is a cancer-specific target. Gold nanoparticles/molybdenum disulfide/reduced graphene oxide (AuNPs/MoS2/rGO) was easily synthesized with hydrothermal method and characterized by transmission electron microscopy (TEM), x-ray diffraction (XRD) and x-ray photoelectron spectroscopy (XPS). Combining the properties of large surface area and good electrical conductivity of AuNPs/MoS2/rGO with the high affinity and specificity of aptamer, a smart hierarchically self-assembled electrochemical aptasensor was established for the specific and sensitive nucleolin (as a model analyte) detection. Under the optimized conditions, AuNPs/MoS2/rGO based aptasensor exhibits a great performance for the detection of nucleolin with a linear response from 0.5 nM to 1.0 μM and a low detection limit of 0.16 nM. In addition, this electrochemical aptasensor has good reproducibility towards nucleolin. Besides, the practicability of the TNA (thiolated nucleolin aptamer)/AuNPs/MoS2/rGO was demonstrated by analysis of nucleolin in the blood sample. This work paves a promising way for the facile synthesis and design MoS2/rGO nanocomposite-based electrochemical aptasensor for testing tumor markers in clinical diagnostics.

中文翻译:

一锅法合成的 AuNPs/MoS2/rGO 纳米复合材料作为用于核仁素检测的灵敏电化学适配传感平台

摘要 简单、快速、灵敏、特异地检测癌细胞在癌症的诊断和预后中起着举足轻重的作用。本文介绍了一种检测核仁蛋白的替代方法,核仁蛋白是一种主要的核仁蛋白,在多种类型的癌症中过度表达,并且是癌症特异性靶标。金纳米粒子/二硫化钼/还原氧化石墨烯(AuNPs/MoS2/rGO)很容易用水热法合成,并通过透射电子显微镜(TEM)、X射线衍射(XRD)和X射线光电子能谱(XPS)表征。结合AuNPs/MoS2/rGO的大表面积和良好的导电性以及适配体的高亲和力和特异性,建立了一种智能分层自组装电化学适体传感器,用于特异性和灵敏的核仁蛋白(作为模型分析物)检测。在优化条件下,基于 AuNPs/MoS2/rGO 的适体传感器在检测核仁蛋白方面表现出出色的性能,线性响应范围为 0.5 nM 至 1.0 μM,检测限低至 0.16 nM。此外,这种电化学适体传感器对核仁素具有良好的重现性。此外,TNA(硫醇化核仁蛋白适体)/AuNPs/MoS2/rGO 的实用性通过血样中核仁蛋白的分析得到证实。这项工作为简便合成和设计基于 MoS2/rGO 纳米复合材料的电化学适体传感器在临床诊断中测试肿瘤标志物铺平了道路。基于 AuNPs/MoS2/rGO 的适体传感器在检测核仁蛋白方面表现出出色的性能,线性响应范围为 0.5 nM 至 1.0 μM,检测下限为 0.16 nM。此外,这种电化学适体传感器对核仁素具有良好的重现性。此外,TNA(硫醇化核仁蛋白适体)/AuNPs/MoS2/rGO 的实用性通过血样中核仁蛋白的分析得到证实。这项工作为简便合成和设计基于 MoS2/rGO 纳米复合材料的电化学适体传感器在临床诊断中测试肿瘤标志物铺平了道路。基于 AuNPs/MoS2/rGO 的适体传感器在检测核仁蛋白方面表现出出色的性能,线性响应范围为 0.5 nM 至 1.0 μM,检测下限为 0.16 nM。此外,这种电化学适体传感器对核仁素具有良好的重现性。此外,TNA(硫醇化核仁蛋白适体)/AuNPs/MoS2/rGO 的实用性通过血样中核仁蛋白的分析得到证实。这项工作为简便合成和设计基于 MoS2/rGO 纳米复合材料的电化学适体传感器在临床诊断中测试肿瘤标志物铺平了道路。TNA(硫醇化核仁蛋白适体)/AuNPs/MoS2/rGO 的实用性通过对血样中核仁蛋白的分析得到证实。这项工作为简便合成和设计基于 MoS2/rGO 纳米复合材料的电化学适体传感器在临床诊断中测试肿瘤标志物铺平了道路。TNA(硫醇化核仁蛋白适体)/AuNPs/MoS2/rGO 的实用性通过对血样中核仁蛋白的分析得到证实。这项工作为简便合成和设计基于 MoS2/rGO 纳米复合材料的电化学适体传感器在临床诊断中测试肿瘤标志物铺平了道路。
更新日期:2020-02-01
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