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Related Experiment Video

Updated: Jun 15, 2026

Surface-enhanced Resonance Raman Scattering Nanoprobe Ratiometry for Detecting Microscopic Ovarian Cancer via Folate Receptor Targeting
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RNA quantification using gold nanoprobes - application to cancer diagnostics.

João Conde1, Jesús M de la Fuente, Pedro V Baptista

  • 1CIGMH, Departamento de Ciências da Vida, Faculdade de Ciências e Tecnologia, Universidade Nova de Lisboa, Campus de Caparica, 2829-516 Caparica, Portugal. pmvb@fct.unl.pt.

Journal of Nanobiotechnology
|February 26, 2010
PubMed
Summary

This study introduces a novel gold nanoparticle method for rapid and sensitive detection of cancer-related molecular alterations. The technique accurately quantifies BCR-ABL fusion transcripts in chronic myeloid leukemia cells, enabling faster diagnosis.

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Area of Science:

  • Nanotechnology
  • Molecular Diagnostics
  • Oncology

Background:

  • Molecular nanodiagnostics offer potential for early cancer detection through sensitive identification of molecular alterations.
  • Gold nanoparticles functionalized with oligonucleotides (Au-nanoprobes) are emerging as a sensitive tool for nucleic acid detection.
  • Early detection of cancer-related molecular alterations is crucial for timely intervention and improved patient outcomes.

Purpose of the Study:

  • To develop and validate a gold nanoparticle-based approach for the molecular recognition and quantification of the BCR-ABL fusion transcript (mRNA).
  • To report the first instance of specific mRNA quantification directly within cancer cells using Au-nanoprobes.
  • To establish an inexpensive, rapid, and sensitive method for detecting and quantifying oncogene transcripts for cancer diagnostics.

Main Methods:

  • Utilized gold nanoparticles derivatized with thiol-modified oligonucleotides (Au-nanoprobes) for molecular detection.
  • Developed a method for direct quantification of unamplified total human RNA and specific detection of the BCR-ABL fusion transcript.
  • Assessed the sensitivity of the Au-nanoprobe assay for differential gene expression analysis from total RNA.

Main Results:

  • Successfully demonstrated the quantification of the BCR-ABL fusion transcript (mRNA) directly in cancer cells.
  • Achieved sensitive detection and quantification of specific mRNA from as little as 10 ng/µL of total RNA.
  • The assay completed in under 30 minutes post-RNA extraction, minimizing RNA degradation and enabling rapid analysis.

Conclusions:

  • The developed Au-nanoprobe method provides an inexpensive, rapid, and highly sensitive approach for quantifying specific mRNA, including the BCR-ABL oncogene transcript.
  • This assay represents a significant advancement for the early diagnosis of chronic myeloid leukemia (CML) and potentially other cancers.
  • The methodology's versatility allows for extension to target other genes implicated in cancer development, offering a promising diagnostic tool.