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Responsive Polydiacetylene Vesicles for Biosensing Microorganisms.

Estelle Lebègue1, Carole Farre2, Catherine Jose3

  • 1Institute of Chemical Sciences, University of Rennes 1, 35000 Rennes, France. estelle.lebegue@univ-rennes1.fr.

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Responsive polydiacetylene (PDA) vesicles offer a colorimetric and fluorescent method for detecting microorganisms like bacteria and viruses. This review details their application and analytical performance for biosensing.

Keywords:
bacteriabiosensingpeptidespolydiacetylenetoxinsvesiclesvirus

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Area of Science:

  • Materials Science
  • Analytical Chemistry
  • Biotechnology

Background:

  • Polydiacetylene (PDA) materials exhibit a stimuli-responsive blue-to-red colorimetric transition and a change from non-fluorescent to fluorescent.
  • These properties make PDA-based systems promising for sensitive and visual detection applications.

Purpose of the Study:

  • To review the principles of using responsive PDA vesicles for detecting various microorganisms (bacteria, viruses) and related biomolecules (toxins, DNA).
  • To detail the detection of antibacterial and antiviral peptides using these PDA vesicle systems.
  • To analyze and compare the performance of PDA vesicles in suspension versus immobilized formats.

Main Methods:

  • Review of existing literature on polydiacetylene (PDA) vesicle synthesis and characterization.
  • Detailed explanation of the colorimetric and fluorescent detection mechanisms triggered by microbial or peptide analytes.
  • Compilation and comparison of analytical performance data for different PDA vesicle configurations (suspension, immobilized, encapsulation).

Main Results:

  • Responsive PDA vesicles enable direct detection of bacteria and viruses, as well as indirect detection via toxins or DNA.
  • Effective detection of antibacterial and antiviral peptides has been demonstrated using PDA vesicle platforms.
  • Analytical performances are presented and compared for vesicles in suspension and immobilized states, highlighting advantages of each.

Conclusions:

  • Responsive PDA vesicles are versatile and sensitive tools for microbial and peptide detection, offering visual readouts.
  • The choice between vesicle suspension or immobilization impacts analytical performance, with specific advantages for each.
  • Further research and development are needed to address future challenges and optimize PDA-based biosensing platforms.