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一个双重向的电化学适应传感器用于检测与神经母细胞瘤相关的microRNA
Gabriel B K Sasa1, Biaxun He1, Chong Chen2
1Medical College, Tianjin University, Tianjin 300072, China.
Talanta
|August 28, 2024
概括
一种新的电化学感应传感器可以在超低水平上准确检测两个关键的神经母细胞瘤微RNA (miRNA-181和miRNA-184). 这种敏感的生物传感器为儿童早期癌症诊断提供了一个有前途的工具.
科学领域:
- 生物医学工程 生物医学工程
- 纳米技术纳米技术
- 分子诊断学 分子诊断
背景情况:
- 神经母细胞瘤 (NB) 是一种具有高死亡率的关键儿科癌症,需要先进的检测方法.
- 像miRNA-181和miRNA-184这样的微RNA (miRNA) 是神经母细胞瘤的关键生物标志物.
- 目前的诊断技术可能缺乏早期检测所需的灵敏度和特异性.
研究的目的:
- 设计和验证一个双目标电化学感应传感器,用于同时检测miRNA-181和miRNA-184.
- 为了实现神经母细胞瘤生物标志物检测的特殊灵敏度和特异性.
- 探索这种口味传感器在癌症查中的临床应用的潜力.
主要方法:
- 用金纳米棒 (AuNRs) 修改的丝网打印碳电极 (SPCEs) 和用aptamer功能化的金纳米粒子 (AuNPs) 的制造.
- 使用微分脉冲电压计 (DPV) 和循环电压计 (CV) 进行电化学检测.
- 使用人体血清样本验证了食感器的性能,并将结果与定量聚合酶连锁反应 (qPCR) 进行了比较.
主要成果:
- 实现了miRNA-181的5.10 aM和miRNA-184.4的9.39 aM的超敏感检测极限 (LODs).
- 对于两个目标miRNAs,证明了从0.1 fM到100 pM的广泛线性检测范围.
- 通过血清样本分析证实了胃感应器的可靠性和准确性,与qPCR有很好的相关性.
结论:
- 开发的双目标电化学感应传感器为神经母细胞瘤生物标志物检测提供了一个高度敏感,特定和便携式平台.
- 这种用户友好且易于设计的生物传感器显示了早期癌症查和临床诊断的重大前景.
- 吸食传感器代表了儿童癌症治疗点诊断领域的宝贵进步.
相关概念视频
01:22MicroRNAs
MicroRNA (miRNA) are short, regulatory RNA transcribed from introns—non-coding regions of a gene—or intergenic regions—stretches of DNA present between genes. Several processing steps are required to form biologically active, mature miRNA. The initial transcript, called primary miRNA (pri-mRNA), base-pairs with itself forming a stem-loop structure. Within the nucleus, an endonuclease enzyme, called Drosha, shortens the stem-loop structure into hairpin-shaped pre-miRNA. After the pre-miRNA ends...
01:22MicroRNAs
MicroRNA (miRNA) are short, regulatory RNA transcribed from introns (non-coding regions of a gene) or intergenic regions (stretches of DNA present between genes). Several processing steps are required to form biologically active, mature miRNA. The initial transcript, called primary miRNA (pri-mRNA), base-pairs with itself, forming a stem-loop structure. Within the nucleus, an endonuclease enzyme, called Drosha, shortens the stem-loop structure into hairpin-shaped pre-miRNA. After the pre-miRNA...
01:17Microbial Biosensors
Microbial biosensors are analytical devices that utilize living microbes to detect specific substances through measurable signals. These devices consist of two main components: biosensing organisms and signal-transducing elements. Biosensing organisms, such as Escherichia coli or Saccharomyces cerevisiae, are typically housed in multiwell plates connected to transducers, enabling rapid, real-time detection of target analytes.Signal Generation MechanismWhen a target analyte—such as...