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Related Concept Videos

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...
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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.
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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

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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...
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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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Chaperone polymer-enhanced microRNA sensing on a surface-functionalised power-free microchip.

Ryo Ishihara1, Kotomi Katori2, Manaya Ogawa3

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

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Summary
This summary is machine-generated.

A novel artificial chaperone polymer significantly enhances microRNA detection. This breakthrough enables rapid, sensitive identification of liquid biopsy biomarkers using a portable microchip.

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Area of Science:

  • Biomarker Discovery
  • Molecular Diagnostics
  • Polymer Science

Background:

  • MicroRNAs (miRNAs) are crucial biomarkers for diseases, but their detection in liquid biopsies is challenging.
  • Existing methods often lack sensitivity, specificity, or require complex instrumentation.
  • Developing rapid and sensitive miRNA detection platforms is critical for early disease diagnosis.

Purpose of the Study:

  • To develop a novel method for sensitive and specific detection of human microRNA-500a-3p (hsa-miR-500a-3p).
  • To leverage artificial chaperone polymers to accelerate hybridization kinetics for microRNA detection.
  • To demonstrate the utility of a portable, power-free microchip for rapid biomarker analysis.

Main Methods:

  • Utilized an artificial chaperone polymer to enhance the hybridization between immobilized DNA probes and target microRNA (hsa-miR-500a-3p).
  • Developed a surface-functionalized, power-free microchip for sample analysis.
  • Employed a portable detection system for rapid results.

Main Results:

  • Achieved sensitive and specific detection of hsa-miR-500a-3p from a small sample volume (1.0 µL).
  • The artificial chaperone polymer improved detection sensitivity by over three orders of magnitude.
  • Demonstrated successful detection within 15 minutes using the portable microchip platform.
  • This represents the first reported use of chaperone polymers to accelerate DNA-microRNA hybridization.

Conclusions:

  • Artificial chaperone polymer-enhanced hybridization offers a highly sensitive and specific method for microRNA detection.
  • The developed portable microchip platform enables rapid point-of-care analysis of liquid biopsy biomarkers.
  • This technology holds significant potential for early disease diagnosis and monitoring.