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相关概念视频

MicroRNAs01:22

MicroRNAs

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...
Riboswitches01:56

Riboswitches

Riboswitches are non-coding mRNA domains that regulate the transcription and translation of downstream genes without the help of proteins. Riboswitches bind directly to a metabolite and can form unique stem-loop or hairpin structures in response to the amount of the metabolite present. They have two distinct regions – a metabolite-binding aptamer and an expression platform.
The aptamer has high specificity for a particular metabolite which allows riboswitches to specifically regulate...
MicroRNAs01:22

MicroRNAs

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...
DNA Microarrays02:34

DNA Microarrays

Microarrays are high-throughput and relatively inexpensive assays that can be automated to analyze large quantities of data at a time. They are used in genome-wide studies to compare gene or protein expression under two varied conditions, such as healthy and diseased states. Microarrays consist of glass or silica slides on which probe molecules are covalently attached through surface functionalization. Most commonly, the slides are prepared through the chemisorption of silanes to silica...
MicroRNAs01:22

MicroRNAs

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...
Microbial Biosensors01:17

Microbial 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...

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伴侣聚合物增强的微RNA传感器在表面功能化的无功率微芯片上.

Ryo Ishihara1, Kotomi Katori2, Manaya Ogawa3

  • 1Faculty of Medicine, Juntendo University, Chiba 270-1695, Japan. ishihara@juntendo.ac.jp.

The Analyst
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概括

一种新型的人工伴侣聚合物显著增强了微RNA检测. 这一突破使得使用便携式微芯片快速,灵敏地识别液体活检生物标记物.

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科学领域:

  • 生物标志物发现发现
  • 分子诊断学 分子诊断
  • 聚合物科学 聚合物科学

背景情况:

  • 微RNA (miRNA) 是疾病的关键生物标志物,但在液体活检中检测它们是具有挑战性的.
  • 现有的方法往往缺乏灵敏度,特异性,或需要复杂的仪器仪表.
  • 开发快速和敏感的miRNA检测平台对于早期疾病诊断至关重要.

研究的目的:

  • 开发一种用于敏感和特定检测人类微RNA-500a-3p (hsa-miR-500a-3p) 的新方法.
  • 为了利用人工伴侣聚合物来加速微RNA检测的杂交动力学.
  • 为了证明便携式,无电源微芯片的实用性,用于快速生物标志物分析.

主要方法:

  • 使用人工伴侣聚合物来增强固定DNA探头和目标microRNA (hsa-miR-500a-3p) 之间的杂交.
  • 开发了一个表面功能化的,无电源的微芯片用于样本分析.
  • 采用便携式检测系统以获得快速结果.

主要成果:

  • 从小样本体积 (1.0μL) 中实现hsa-miR-500a-3p的敏感和特定检测.
  • 人工伴侣聚合物提高了超过三倍的检测灵敏度.
  • 使用便携式微芯片平台,在15分钟内成功检测.
  • 这是首次报告使用伴侣聚合物加速DNA-microRNA杂交的情况.

结论:

  • 人工伴侣聚合物增强混合化为微RNA检测提供了一种高度敏感和特定的方法.
  • 开发的便携式微芯片平台使液体活检生物标志物的快速临床分析成为可能.
  • 这项技术对早期疾病诊断和监测具有重大潜力.