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New Immunosensing-Fluorescence Detection of Tumor Marker Cytokeratin-19 Fragment (CYFRA 21-1) Via Carbon Quantum Dots/Zinc Oxide Nanocomposite.
Nanoscale Research Letters ( IF 5.418 ) Pub Date : 2020-01-15 , DOI: 10.1186/s11671-020-3247-9
Nawal Ahmed Alarfaj 1 , Maha Farouk El-Tohamy 1 , Hesham Farouk Oraby 2
Affiliation  

The rapid detection of lung cancer in early stages using the antigen cytokeratin-19 fragment (CYFRA 21-1) as a tumor marker in human serum plays an important role in the survival of patients and taking a fast surgical reaction. This study aimed to employ the green synthesized carbon quantum dots conjugated zinc oxide nanocomposite as a highly sensitive fluorescence immunosensing solution for fast determination of CYFRA 21-1 antigen in human serum. The suggested method was conducted by applying a hydrothermal method to prepare carbon quantum dots using Citrus lemon pericarp. The formed carbon quantum dots were used in the reduction and stabilization of zinc acetate to synthesize carbon quantum dots-zinc oxide nanocomposite. To form a sandwich capping antibody-antigen-antibody immunosensing system, a CYFRA 21-1 antigen was trapped by immobilizing a non-conjugated monoclonal antibody BM 19.21 on the surface of carbon quantum dots-zinc oxide nanocomposite and another monoclonal antibody KS 19.1, which was coated on the microtiter well surface. This system has a tunable fluorescence feature recorded at excitation and emission of λex = 470 and λem = 520 nm, respectively. The suggested nanocomposite fluorescence immunosensing system displayed a linear relationship of 0.01-100 ng mL-1 with a limit of detection of 0.008 ng mL-1. The suggested immunosensing system based on carbon quantum dots-zinc oxide nanocomposite provides a promising approach for rapid diagnoses of lung cancer by detecting CYFRA 21-1 in human serum.

中文翻译:

通过碳量子点/氧化锌纳米复合材料对肿瘤标记物细胞角蛋白19片段(CYFRA 21-1)进行新的免疫荧光检测。

使用抗原细胞角蛋白19片段(CYFRA 21-1)作为人血清中的肿瘤标志物在早期阶段对肺癌进行快速检测在患者生存和快速手术反应中起着重要作用。本研究旨在将绿色合成的碳量子点共轭氧化锌纳米复合材料用作高灵敏度的荧光免疫传感溶液,用于快速测定人血清中的CYFRA 21-1抗原。建议的方法是通过应用水热法使用柑橘柠檬果皮制备碳量子点而进行的。所形成的碳量子点被用于还原和稳定乙酸锌,以合成碳量子点-氧化锌纳米复合材料。为了形成夹心加帽抗体-抗原-抗体免疫传感系统,通过将非结合的单克隆抗体BM 19.21固定在碳量子点-氧化锌纳米复合材料的表面上,并将另一种单克隆抗体KS 19.1固定在微滴定孔表面上,从而捕获CYFRA 21-1抗原。该系统具有在激发和发射分别为λex= 470和λem= 520 nm时记录的可调荧光特征。建议的纳米复合荧光免疫传感系统显示出0.01-100 ng mL-1的线性关系,检出限为0.008 ng mL-1。建议的基于碳量子点-氧化锌纳米复合材料的免疫传感系统通过检测人血清中的CYFRA 21-1,为快速诊断肺癌提供了一种有前途的方法。在碳量子点-氧化锌纳米复合材料的表面上具有21和另一种单克隆抗体KS 19.1,其被包被在微量滴定孔表面上。该系统具有在激发和发射分别为λex= 470和λem= 520 nm时记录的可调荧光特征。建议的纳米复合荧光免疫传感系统显示出0.01-100 ng mL-1的线性关系,检出限为0.008 ng mL-1。建议的基于碳量子点-氧化锌纳米复合材料的免疫传感系统通过检测人血清中的CYFRA 21-1,为快速诊断肺癌提供了一种有前途的方法。在碳量子点-氧化锌纳米复合材料的表面上具有21和另一种单克隆抗体KS 19.1,其被包被在微量滴定孔表面上。该系统具有在激发和发射分别为λex= 470和λem= 520 nm时记录的可调荧光特征。建议的纳米复合荧光免疫传感系统显示出0.01-100 ng mL-1的线性关系,检出限为0.008 ng mL-1。建议的基于碳量子点-氧化锌纳米复合材料的免疫传感系统通过检测人血清中的CYFRA 21-1,为快速诊断肺癌提供了一种有前途的方法。建议的纳米复合荧光免疫传感系统显示出0.01-100 ng mL-1的线性关系,检出限为0.008 ng mL-1。建议的基于碳量子点-氧化锌纳米复合材料的免疫传感系统通过检测人血清中的CYFRA 21-1,为快速诊断肺癌提供了一种有前途的方法。建议的纳米复合荧光免疫传感系统显示出0.01-100 ng mL-1的线性关系,检出限为0.008 ng mL-1。建议的基于碳量子点-氧化锌纳米复合材料的免疫传感系统通过检测人血清中的CYFRA 21-1,为快速诊断肺癌提供了一种有前途的方法。
更新日期:2020-01-15
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