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Related Concept Videos

MicroRNAs01:22

MicroRNAs

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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...
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Updated: Sep 14, 2025

Profiling of Estrogen-regulated MicroRNAs in Breast Cancer Cells
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High sensitivity and specificity analysis of multiple miRNAs.

Yanyan Sun1, Yunlong Sun1, Yufei Peng1

  • 1State Key Laboratory of Analytical Chemistry for Life Science, School of Chemistry and Chemical Engineering, Nanjing University, No 163, Xianlin Avenue, Nanjing, 210023, PR China.

Analytica Chimica Acta
|July 23, 2025
PubMed
Summary
This summary is machine-generated.

A novel method enables multiplex microRNA (miRNA) detection using enzyme-free amplification and capillary electrophoresis. This approach offers high specificity and sensitivity for diagnosing diseases like cancer.

Keywords:
Entropy-driven circuitLED induced fluorescence detectionMultiplex microRNA detectionNon-gel sieving capillary electrophoresisStrand displacement

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Area of Science:

  • Biochemistry
  • Molecular Biology
  • Analytical Chemistry

Background:

  • Aberrant microRNA (miRNA) expression is linked to diseases, especially cancers.
  • Current multiplex miRNA detection methods face challenges in simplicity and sensitivity.
  • A need exists for advanced techniques for simultaneous detection of multiple miRNAs.

Purpose of the Study:

  • To develop a novel, sensitive, and specific multiplex miRNA detection strategy.
  • To overcome limitations of existing methods for simultaneous miRNA analysis.
  • To enable cost-effective and efficient miRNA detection for clinical applications.

Main Methods:

  • A non-gel sieving capillary electrophoresis (NGCE) strategy was developed.
  • Enzyme-free entropy-driven circuit (EDC) amplification was employed for sensitivity enhancement.
  • Magnetic bead purification and drag tags were integrated for efficient separation and detection.

Main Results:

  • Successful baseline separation of seven target miRNAs was achieved using NGCE.
  • Detection limits ranged from 154.6 amol to 933.8 amol with high recovery rates (88.36–115.14%) in human serum.
  • The method demonstrated high specificity, distinguishing single-nucleotide mismatched miRNAs and showing no cross-reactivity.

Conclusions:

  • The developed strategy allows for multiplex miRNA detection with high specificity and sensitivity.
  • The method is cost-effective, eliminating the need for fluorescent labeling or enzymatic steps.
  • This approach holds significant potential for early cancer diagnosis and prognostic management.