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Related Experiment Video

Updated: Jun 16, 2025

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Fast Isolation and Sensitive Multicolor Visual Detection of Small Extracellular Vesicles by Multifunctional

Guihua Zhang1, Qiannan Zhang1, Huanghuang Zhu1

  • 1State Key Laboratory of Physical Chemistry of Solid Surfaces, Key Laboratory for Chemical Biology of Fujian Province, The MOE Key Laboratory of Spectrochemical Analysis and Instrumentation, Department of Chemical Biology, College of Chemistry and Chemical Engineering, Xiamen University, Xiamen 361005, China.

Analytical Chemistry
|August 19, 2024
PubMed
Summary

Researchers developed a new SIMPLE method for fast isolation and sensitive detection of small extracellular vesicles (sEVs). This aptamer-functionalized nanosphere approach offers a rapid, visual, and instrument-free platform for sEV analysis and disease monitoring.

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Area of Science:

  • Biotechnology
  • Nanotechnology
  • Biomedical Engineering

Background:

  • Small extracellular vesicles (sEVs) are crucial for intercellular communication, with significant diagnostic and therapeutic potential.
  • Current methods for sEV isolation and detection face challenges in efficiency, sensitivity, and speed.
  • Developing rapid and sensitive techniques is vital for advancing sEV-based applications.

Purpose of the Study:

  • To introduce a novel strategy, SIMPLE (fast isolation and multicolor visual detection of sEVs using aptamer-functionalized polydopamine nanospheres).
  • To enable efficient isolation and highly sensitive detection of sEVs.
  • To provide a versatile platform for disease monitoring and functional exploration.

Main Methods:

  • Synthesis of aptamer-functionalized polydopamine nanospheres (Apt-PDANS).
  • Utilizing Apt-PDANS for selective binding to sEV surface proteins, increasing their size for filtration-based isolation.
  • Employing Fe3+-doped PDANS for multicolor visual detection and quantitative analysis.

Main Results:

  • Achieved fast isolation of sEVs via filtration, bypassing ultracentrifugation limitations.
  • Demonstrated highly sensitive detection with a limit of 3.2 × 10^4 sEV mL^-1 within 1 hour.
  • Enabled instrument-free, multicolor visual detection and quantitative analysis of sEVs.

Conclusions:

  • The SIMPLE strategy offers a straightforward, rapid, sensitive, and versatile platform for sEV analysis.
  • This method shows potential for monitoring epithelial-mesenchymal transition and cancer diagnosis.
  • The technology could be widely adopted for various disease monitoring and functional studies.