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Fluidic Membrane-Bound Protocells Enabling Versatile Assembly of Functional Nanomaterials for Biomedical

Baihao You1, Chia-Hung Chen1

  • 1Department of Biomedical Engineering, City University of Hong Kong, Y6700, 6/F, Yellow Zone, Yeung Kin Man Academic Building, 83 Tat Chee Avenue, Kowloon, Hong Kong 999077, China.

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Summary

Researchers developed robust fluidic membrane-bound protocells (FMPs) using tannic acid and PEG. These FMPs can be functionalized with nanomaterials for biomedical applications, such as catalyzing reactions for potential gout treatment.

Keywords:
coacervate dropletdense hydrogen bonding networkfluidic membranenanoassemblyprotocell

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Area of Science:

  • Soft matter physics
  • Biomimetic materials science
  • Nanotechnology

Background:

  • Membrane-bound protocells are crucial for compartmentalizing biochemical reactions but often lack stability and functionalization capabilities for biomedical use.
  • Existing synthetic protocells struggle with robustness in biological settings and are difficult to modify for advanced applications.

Purpose of the Study:

  • To develop stable and easily functionalizable fluidic membrane-bound protocells (FMPs) for biomedical applications.
  • To create a new class of protocells leveraging liquid-liquid phase separation and hydrogen bonding for enhanced structural integrity.

Main Methods:

  • Utilized liquid-liquid phase separation of tannic acid (TA) and polyethylene glycol (PEG) to form coacervate droplets.
  • Introduced polyvinylpyrrolidone (PVP) to create a dense surface hydrogen bonding network, forming robust FMPs.
  • Employed electrostatic attraction for post-functionalization with nanomaterials, specifically Pt/CeO2 nanozymes.

Main Results:

  • Successfully synthesized robust fluidic membrane-bound protocells (FMPs) with enhanced stability.
  • Demonstrated flexible post-functionalization of FMPs with nanozymes (Pt/CeO2@Fe3+/FMPs).
  • The functionalized FMPs effectively catalyzed the degradation of uric acid and hydrogen peroxide.

Conclusions:

  • The developed FMPs offer a stable and versatile platform for compartmentalized biochemical reactions.
  • The ability to incorporate functional nanomaterials opens avenues for designing advanced therapeutic systems.
  • These FMPs show promise for treating conditions like gout by degrading harmful byproducts.