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Anticancer LNA Oligonucleotides Detection through a Simple Paper-Based Platform.

Ada Raucci1,2, Giovanna Liciberto1, Michele Guida1

  • 1University of Naples Federico II, Department of Pharmacy, Via D. Montesano 49, Naples 80131, Italy.

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Summary
This summary is machine-generated.

We developed a paper-based electrochemical biosensor for detecting locked nucleic acid (LNA) oligonucleotides in biological fluids. This rapid, low-cost assay enables point-of-care monitoring for LNA therapeutics.

Keywords:
LNAsantisense oligonucleotideselectrochemical biosensorsmiRNAspersonalized medicine

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Area of Science:

  • Biomedical Engineering
  • Analytical Chemistry
  • Molecular Biology

Background:

  • Locked nucleic acids (LNAs) are crucial for gene silencing and precision oncology but lack simple quantification methods for clinical use.
  • Current methods for LNA detection are not suitable for direct analysis in biological fluids, hindering therapeutic optimization.
  • Effective monitoring of LNA drug levels is essential for personalized medicine and timely therapeutic feedback.

Purpose of the Study:

  • To develop a rapid, sensitive, and portable biosensor for direct quantification of antisense LNA oligonucleotides in biological samples.
  • To establish a point-of-care assay for monitoring LNA-based therapeutics, addressing the limitations of existing methods.
  • To demonstrate the feasibility of using a paper-based electrochemical platform for LNA detection in complex matrices like human plasma.

Main Methods:

  • Designed a paper-based electrochemical biosensor utilizing gold nanoparticle-modified electrodes.
  • Employed a methylene blue-labeled RNA probe that hybridizes with the target LNA oligonucleotide.
  • Utilized a signal-off voltammetric detection strategy upon target hybridization.

Main Results:

  • Achieved picomolar detection limits for LNA oligonucleotides.
  • Demonstrated high reproducibility and reliability of the biosensor.
  • Confirmed successful detection in undiluted human plasma without prior sample preparation.

Conclusions:

  • The developed paper-based electrochemical biosensor offers a simple, rapid, and cost-effective method for direct LNA quantification.
  • This platform facilitates point-of-care monitoring of LNA therapeutics, improving personalized treatment strategies.
  • The versatile biosensor design provides a foundation for future personalized medicine platforms targeting oligonucleotide therapeutics.