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Ultrasensitive Detection of Matrix Metalloproteinase 2 Activity Using a Ratiometric Surface-Enhanced Raman Scattering

Yingying Chen1, Dan Zhu1, Hanyan Zhong1

  • 1Jiangsu Key Laboratory on Optoelectronic Technology, School of Computer and Electronic Information/School of Artificial Intelligence, Nanjing Normal University, Nanjing 210023, Jiangsu, People's Republic of China.

ACS Applied Materials & Interfaces
|January 11, 2024
PubMed
Summary
This summary is machine-generated.

A novel nanosensor detects matrix metalloproteinase 2 (MMP-2) using ratiometric surface-enhanced Raman scattering (SERS). This sensitive tool aids in early cancer diagnosis by analyzing MMP-2 activity in tumor secretions.

Keywords:
MMP-2SERScore−satelliteratiometric detectiontumor

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Area of Science:

  • Biomedical Engineering
  • Analytical Chemistry
  • Oncology

Background:

  • Matrix metalloproteinase 2 (MMP-2) is a key enzyme implicated in cancer progression and metastasis.
  • Dysregulation of MMP-2 activity serves as a potential biomarker for cancer diagnosis and classification.
  • Developing sensitive and specific detection methods for MMP-2 is crucial for clinical applications.

Purpose of the Study:

  • To develop a highly sensitive and specific ratiometric surface-enhanced Raman scattering (SERS) nanosensor for quantifying MMP-2 activity.
  • To utilize a core-satellite nanostructure for reliable MMP-2 detection.
  • To explore the potential of this nanosensor for early cancer diagnosis using tumor cell secretions.

Main Methods:

  • Fabrication of a core-satellite SERS nanosensor comprising a magnetic bead core (DTNB-labeled gold shell) and a silver nanoparticle satellite (MBN-encoded).
  • The core and satellite were linked via an MMP-2-specific peptide substrate.
  • Quantification of MMP-2 activity based on the ratiometric change in SERS signals from DTNB (internal standard) and MBN (signal probe) upon peptide cleavage.

Main Results:

  • The developed nanosensor demonstrated high sensitivity and specificity for MMP-2 detection.
  • A low limit of detection (2.067 ng/mL) and a wide dynamic range (5–100 ng/mL) were achieved.
  • The nanosensor successfully quantified MMP-2 activity in tumor cell secretions, validating its practical applicability.

Conclusions:

  • The core-satellite structure-powered ratiometric SERS nanosensor provides a reliable platform for MMP-2 activity detection.
  • This technology holds promise for the early diagnosis and classification of malignant tumors.
  • The developed nanosensor offers a sensitive and specific approach for biomarker analysis in biological samples.