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Related Experiment Video

Updated: Jun 29, 2026

Extracellular Vesicle Tissue Factor Activity Assay
03:53

Extracellular Vesicle Tissue Factor Activity Assay

Published on: December 29, 2023

Small extracellular vesicles-enhanced enzymatic activity for sensitive detection.

Zhiyi Yan1, Mengjiao Mei1, Wenchao Geng2

  • 1College of Public Health, Zhengzhou University, Zhengzhou, 450001, China.

Biosensors & Bioelectronics
|June 27, 2026
PubMed
Summary
This summary is machine-generated.

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Researchers developed enhanced enzyme systems using small extracellular vesicles (sEVs) with cytochrome c (Cytc) and quantum dots (QDs). These sEV-based systems show significantly improved catalytic activity for biosensing applications.

Area of Science:

  • Biotechnology
  • Nanotechnology
  • Biosensing

Background:

  • Developing high-activity natural enzyme and nanozyme catalytic systems is crucial for biosensing.
  • Small extracellular vesicles (sEVs) offer a promising platform for enzyme activity regulation due to their biocompatibility and unique membrane structure.

Purpose of the Study:

  • To construct enhanced enzyme systems by incorporating cytochrome c (Cytc) and quantum dots (QDs) into sEVs.
  • To evaluate the peroxidase-like activity and detection capabilities of the novel sEV-based nanozyme systems.

Main Methods:

  • sEVs were utilized to encapsulate or conjugate Cytc and QDs, forming Cytc@sEVs and QDs@sEVs.
  • The peroxidase-like activity of the modified sEVs was compared to free Cytc and QDs.
  • The detection limit of the Cytc@sEVs system for sEVs was determined.
Keywords:
Cytochrome cNanozymeNatural enzymeQuantum dotssEVs

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Last Updated: Jun 29, 2026

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Main Results:

  • Cytc@sEVs, CQDs@sEVs, and WQDs@sEVs demonstrated significantly enhanced peroxidase activity (15-fold, 2-fold, and 12-fold, respectively) compared to their free counterparts.
  • The Cytc@sEVs system achieved a low detection limit of 43 particles/μL for sEVs detection.
  • sEVs effectively enhanced the catalytic performance of incorporated enzymes and nanozymes.

Conclusions:

  • The integration of sEVs with enzymes and QDs provides an effective strategy for creating high-performance nanozyme catalytic systems.
  • This sEV-driven enhancement approach offers a novel route for advancing biosensing technologies.
  • The developed system shows potential for sensitive detection of extracellular vesicles.