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Related Experiment Video

Updated: Jan 17, 2026

Surface-enhanced Resonance Raman Scattering Nanoprobe Ratiometry for Detecting Microscopic Ovarian Cancer via Folate Receptor Targeting
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Dual Gatekeepers-Driven Signal Amplification Strategy for Precise Detection and Modulation of Ovarian Cancer Exosome

Ying Chen1, Liang Shen2, Yuan Wei3

  • 1The First Affiliated Hospital of Shandong First Medical University, Shandong Provincial Qianfoshan Hospital, Jinan 250014, China.

ACS Sensors
|September 19, 2025
PubMed
Summary

This study presents a novel dual gatekeeper strategy for sensitive ovarian cancer detection using aptamers. The method differentiates malignant from benign exosomes, aiding early tumor diagnosis and understanding intercellular communication.

Keywords:
AgNCsaptamercell-exosome interactionsexosome subtypeproximity-activated DNA walking

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MicroRNA Amplification and Recognition through Locked-nucleic-acid In situ Hybridization as A Novel Detection and Quantification Method
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MicroRNA Amplification and Recognition through Locked-nucleic-acid In situ Hybridization as A Novel Detection and Quantification Method

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Area of Science:

  • Biomedical Engineering
  • Molecular Biology
  • Cancer Research

Background:

  • Early ovarian cancer detection is challenging due to subtle symptoms and overlapping protein expression.
  • Distinguishing malignant from benign exosomes is crucial for accurate diagnosis.

Purpose of the Study:

  • To develop a highly sensitive detection strategy for ovarian cancer-derived exosome subtypes.
  • To precisely modulate exosome interactions with target cells for therapeutic insights.

Main Methods:

  • Utilized CA125 and carcinoembryonic antigen (CEA) aptamers as dual gatekeepers for exosome recognition.
  • Employed hairpin DNA structures and an exonuclease III-driven DNA walking system for signal amplification.
  • Incorporated nucleic acid-stabilized silver nanoclusters (AgNCs) to enhance detection sensitivity.

Main Results:

  • Achieved highly sensitive and specific detection of ovarian cancer exosomes.
  • Successfully differentiated malignant exosomes from benign ones.
  • Enabled distinction between early and late-stage ovarian tumors.
  • Demonstrated regulation of exosome-target cell interactions.

Conclusions:

  • The dual gatekeeper strategy offers a powerful tool for early ovarian cancer detection.
  • This approach provides insights into exosome-mediated intercellular communication and immune evasion.
  • Establishes a foundation for cancer immunotherapy research and exosome-related biological processes.