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用于检测面筋的荧光封端介孔适体传感器。

A fluorogenic capped mesoporous aptasensor for gluten detection.

机构信息

CIBER de Bioingeniería, Biomateriales y Nanomedicina (CIBER-BBN) Av, Monforte de Lemos, 3-5. Pabellón 11, Planta 0 28029 Madrid, Spain; Instituto Interuniversitario de Investigación de Reconocimiento Molecular y Desarrollo Tecnológico, Universitat Politècnica de València, Universitat de València, Camino de Vera s/n, 46022, Valencia, Spain; Unidad Mixta de Investigación en Nanomedicina y Sensores. Universitat Politècnica de València, Instituto de Investigación Sanitaria La Fe, Av. Fernando Abril Martorell 106, Torre A, planta 6, 46026, Valencia, Spain.

CIBER de Bioingeniería, Biomateriales y Nanomedicina (CIBER-BBN) Av, Monforte de Lemos, 3-5. Pabellón 11, Planta 0 28029 Madrid, Spain; Instituto Interuniversitario de Investigación de Reconocimiento Molecular y Desarrollo Tecnológico, Universitat Politècnica de València, Universitat de València, Camino de Vera s/n, 46022, Valencia, Spain; Unidad Mixta de Investigación en Nanomedicina y Sensores. Universitat Politècnica de València, Instituto de Investigación Sanitaria La Fe, Av. Fernando Abril Martorell 106, Torre A, planta 6, 46026, Valencia, Spain; Departamento de Químiíca Física, Universitat de València, C/ Doctor Moliner, 50, 46100, Burjassot, Valencia, Spain; Unidad Mixta UPV-CIPF de Investigación en Mecanismos de Enfermedades y Nanomedicina. Universitat Politècnica de València, Centro de Investigación Príncipe Felipe, C/ Eduardo Primo Yúfera 3, 46012, Valencia, Spain.

出版信息

Anal Chim Acta. 2021 Feb 22;1147:178-186. doi: 10.1016/j.aca.2020.12.060. Epub 2020 Dec 30.

DOI:
10.1016/j.aca.2020.12.060
PMID:33485577
Abstract

Celiac disease is a complex and autoimmune disorder caused by the ingestion of gluten affecting almost 1% of global population. Nowadays an effective treatment does not exist, and the only way to manage the disease is the removal of gluten from the diet. Owing the key role played by gluten, clear and regulated labelling of foodstuff and smart methods for gluten detection are needed to fight frauds on food industry and to avoid the involuntary ingestion of this protein by celiac patients. On that scope, the development of a novel detection system of gluten is here presented. The sensor consists of nanoporous anodic alumina films loaded with a fluorescent dye and capped with an aptamer that recognizes gliadin (gluten's soluble proteins). In the presence of gliadin, aptamer sequences displace from the surface of anodic alumina resulting in pore opening and dye delivery. The dispositive shows a limit of detection (LOD) of 100 μg kg of gliadin, good selectivity and a detection time of approximately 60 min. Moreover, the sensor is validated in real food samples. This novel probe allows fast gluten detection through a simple signalling process with potential use for food control.

摘要

乳糜泻是一种由摄入麸质引起的复杂自身免疫性疾病,影响了全球近 1%的人口。目前尚无有效的治疗方法,而管理这种疾病的唯一方法就是从饮食中去除麸质。鉴于麸质的关键作用,需要对食品进行清晰和规范的标签,并采用智能的麸质检测方法,以打击食品行业的欺诈行为,并避免乳糜泻患者无意中摄入这种蛋白质。在这一领域,我们提出了一种新型的麸质检测系统。该传感器由负载荧光染料的纳米多孔阳极氧化铝膜和识别麦醇溶蛋白(麸质的可溶性蛋白质)的适体组成。在麦醇溶蛋白存在的情况下,适体序列从阳极氧化铝表面置换,导致孔打开和染料传递。该设备的检测限为 100μg/kg 麦醇溶蛋白,具有良好的选择性和大约 60 分钟的检测时间。此外,该传感器在实际食品样本中得到了验证。这种新型探针通过简单的信号处理实现快速的麸质检测,具有用于食品控制的潜力。

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