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Related Concept Videos

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...

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Related Experiment Video

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A Multiplexed Luciferase-based Screening Platform for Interrogating Cancer-associated Signal Transduction in Cultured Cells
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Quantitative oncogene-mapping within malignant tumors through Multi-parameter MRI based on RNA-triggered nanoprobes.

Wenyue Li1,2,3,4, Runjie Wang2, Xinyi Zhang2

  • 1Department of Rehabilitation Medicine, School of Medicine, the Second Affiliated Hospital of South China University of Technology (Guangzhou First People's Hospital), Guangzhou, 510180, China.

Materials Today. Bio
|February 25, 2026
PubMed
Summary

This study introduces a novel magnetic resonance tuning (MRET) imaging method for precise cancer diagnosis. The technique uses targeted nanoprobes to quantify microRNA (miRNA) levels in tumors, enabling early detection.

Keywords:
Magnetic resonance imagingMagnetic resonance tuningMulti-parameterOncogene-mappingTumor-associated miRNA

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Area of Science:

  • Biomedical Engineering
  • Molecular Imaging
  • Nanotechnology

Background:

  • Genomic instability is a hallmark of cancer, necessitating precise oncogene detection for early diagnosis.
  • Detecting low-abundance oncogenes in vivo remains a significant challenge for current imaging techniques.

Purpose of the Study:

  • To develop a quantitative magnetic resonance imaging (MRI) strategy for analyzing tumor-associated microRNA (miRNA) using magnetic resonance tuning (MRET).
  • To establish a method for early tumor diagnosis and pathological analysis through precise oncogene quantification.

Main Methods:

  • Integrated superparamagnetic iron oxide (Fe3O4) nanoparticles and paramagnetic gadolinium (Gd-DTPA) enhancers via a DNA linker.
  • Embedded AS1411 aptamers for targeting overexpressed nucleolins in tumor cells.
  • Utilized hybridization with target miRNA to release Gd3+-labeled sequences, enhancing T1 signals for miRNA quantification.

Main Results:

  • Verified the MRET effect in vitro with varying concentrations of miR-21.
  • Visualized enhanced T2 and activated T1 signals in vivo in 4T1 and CT26 subcutaneous tumor models.
  • Established a quantitative correlation between MRI signals and local miR-21 concentration in vivo.

Conclusions:

  • The developed nanoprobes show potential for precise tumor-related gene diagnosis and quantification.
  • This approach offers a promising avenue for prompt and accurate tumor diagnosis through miRNA analysis.