相关实验视频

Updated: May 24, 2025

Digital Polymerase Chain Reaction Assay for the Genetic Variation in a Sporadic Familial Adenomatous Polyposis Patient Using the Chip-in-a-tube Format

Digital Polymerase Chain Reaction Assay for the Genetic Variation in a Sporadic Familial Adenomatous Polyposis Patient Using the Chip-in-a-tube Format

Published on: August 20, 2018

通过BODIPY-bismuthene DNA生物传感器进行先进的诊断

Laura Gutiérrez-Gálvez¹, Estefanía Enebral-Romero^1,2, Miguel Ángel Valle Amores³

¹Departamento de Química Analítica y Análisis Instrumental, Universidad Autónoma de Madrid, 28049, Madrid, Spain. tania.garcia@uam.es.

|March 6, 2025

概括

这项研究介绍了一种新型的电化学生物传感器,使用了少数层的比斯木六边形和BODIPY衍生品,用于在没有放大的情况下在患者样本中快速,敏感地检测像SARS-CoV-2这样的病毒序列.

科学领域:

纳米材料科学科学纳米材料科学
生物传感器技术技术
传染病诊断传染病诊断传染病诊断

背景情况:

病毒感染的早期和准确诊断对于有效的治疗和公共健康至关重要.
现有的诊断方法通常需要放大步骤,增加时间和复杂性.
开发灵敏,快速和临床诊断工具是非常可取的.

研究的目的:

开发一种电化学生物传感器,用于早期感染诊断.
直接从鼻抽样中检测特定的病毒序列.
为了增强检测,利用几层甲基六边形 (FLBHs) 和一个BODIPY (BDP) 衍生物 (BDP-NaSO3).

主要方法:

使用FLBHs制造一个电化学生物传感器平台.
在FLBH平台上固定硫化DNA捕获探针.
使用BDP-NaSO3作为目标序列杂交的电化学指标.
使用SARS-CoV-2特定序列 (RdRp基因) 测试生物传感器的性能.
生物传感器的验证,通过直接检测鼻口腔拭子样本.

主要成果:

FLBHs为DNA探头固定提供了一个改进的平台,提高了灵敏度.
BDP-NaSO3作为混合化事件的有效电化学指标.
生物传感器实现了SARS-CoV-2 RdRp序列的4.97 fM的低检测极限.
已经证明了选择性和快速检测,具有从16.6 fM到100 fM的线性范围.
在19 Cts的鼻拭片样本中成功检测出SARS-CoV-2,没有放大.

结论:

开发的电化学生物传感器为早期病毒感染诊断提供了一种敏感,特定和快速的方法.
FLBHs和BDP-NaSO3的组合为直接核酸检测提供了一个强大的平台.
生物传感器的稳定性,较低的样本体积要求和临床治疗点的潜力使其适用于临床环境.

更多相关视频

In Vitro Biochemical Assays using Biotin Labels to Study Protein-Nucleic Acid Interactions

In Vitro Biochemical Assays using Biotin Labels to Study Protein-Nucleic Acid Interactions

Published on: July 17, 2019

Development of an Electrochemical DNA Biosensor to Detect a Foodborne Pathogen

Development of an Electrochemical DNA Biosensor to Detect a Foodborne Pathogen

Published on: June 3, 2018

相关概念视频

Labeling DNA Probes

Labeling DNA Probes

DNA probes are fragments of DNA labeled with a reporter tag to enable their detection or purification. The resulting labeled DNA probes can then hybridize to target nucleic acid sequences through complementary base-pairing, and may be used to recover or identify these regions.
Radioisotopes, fluorophores, or small molecule binding partners like biotin or digoxigenin, are the most widely used reporter tags for labeling DNA probes. These labels can be attached to the probe DNA molecule via...

Southern Blot

Southern Blot

Agarose gel electrophoresis is very useful in separating DNA fragments by size. Running a DNA ladder containing fragments of the known length alongside the sample helps determine the approximate length of the sample DNA fragments. However, additional steps are needed to verify the sequence identity of the sample DNA fragments.
Denatured DNA fragments must be transferred onto a carrier membrane from the gel to make it accessible to a probe - a small ssDNA fragment complementary to the target DNA...