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Related Experiment Video

Updated: Feb 14, 2026

Expression and Purification of Virus-like Particles for Vaccination
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Polymeric particles in vaccine delivery.

Allison C Rice-Ficht1, Angela M Arenas-Gamboa, Melissa M Kahl-McDonagh

  • 1Department of Molecular and Cellular Medicine, Texas A&M Health Science Center, College of Medicine, College Station, TX 77843-1114, USA. a-ficht@tamu.edu

Current Opinion in Microbiology
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Summary

Particulate vaccine delivery systems enhance adaptive immunity by improving antigen uptake and presentation. Particle characteristics like size and surface properties are key to optimizing immune responses.

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Area of Science:

  • Immunology
  • Vaccinology
  • Nanotechnology

Background:

  • Particulate vaccine delivery systems are increasingly recognized for their strategic role in vaccine design.
  • Antigen entrapment within particles significantly influences antigen acquisition, processing by antigen-presenting cells, and subsequent adaptive immune responses.
  • The adjuvant properties of particles are now understood at a molecular level, involving the Nalp3 inflammasome and toll-like receptor ligands.

Purpose of the Study:

  • To investigate the impact of particulate vaccine delivery systems on adaptive immunity.
  • To elucidate the mechanisms by which particles modulate immune cell interactions and responses.
  • To identify key particle characteristics that can be tuned to optimize vaccine efficacy.

Main Methods:

  • Utilizing erodible particles for antigen encapsulation and delivery to dendritic cells (DCs).
  • Employing particles less than 1 micrometer in size with amphipathic coatings.
  • Analyzing the effects of particle size, dissolution rates, surface chemistry, and charge on immune activation.

Main Results:

  • Inclusion of antigen within particles promotes antigen-specific cell-mediated immunity and prolonged antigen presentation.
  • Particles efficiently deliver antigen to and activate DCs, leading to combined humoral and cellular immune engagement.
  • Particle characteristics such as size, dissolution rate, surface chemistry, and charge are critical determinants of adaptive immunity.

Conclusions:

  • Particulate vaccine delivery systems offer a powerful strategy for enhancing vaccine-induced adaptive immunity.
  • Optimizing particle properties is central to designing effective vaccines that elicit robust and protective immune responses.
  • These findings highlight the potential of nanotechnology in advancing vaccine development.