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A microarray patch SARS-CoV-2 vaccine induces sustained antibody responses and polyfunctional cellular immunity.

Stephen C Balmert1, Zohreh Gholizadeh Ghozloujeh1, Cara Donahue Carey1

  • 1Department of Dermatology, University of Pittsburgh School of Medicine, Pittsburgh, PA 15213, USA.

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Summary

A novel dissolvable microneedle array patch (MAP) vaccine for SARS-CoV-2 offers needle-free immunization. This stable, shelf-ready MAP vaccine enhances immune responses and safety compared to traditional injections.

Keywords:
ImmunologyMedical biotechnologyVirology

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Area of Science:

  • Immunology
  • Vaccinology
  • Dermatology

Background:

  • Global immunization requires effective, broadly deployable vaccines for COVID-19 and emerging diseases.
  • Traditional intramuscular vaccines face challenges in stability, delivery, and systemic toxicity.

Purpose of the Study:

  • To develop and evaluate a dissolvable microarray patch (MAP) SARS-CoV-2 vaccine for needle-free immunization.
  • To assess the immunogenicity, safety, and stability of the MAP vaccine platform.

Main Methods:

  • Development of multicomponent MAPs delivering SARS-CoV-2 S1 antigen and a TLR3 agonist (Poly(I:C)).
  • Evaluation of immune responses (antibody and cellular) in systemic and mucosal sites.
  • Assessment of vaccine stability, toxicity, and antigen-presenting cell activation in human skin models.

Main Results:

  • MAP vaccines induced robust systemic and respiratory mucosal antibody and cellular immune responses.
  • Antibodies neutralized SARS-CoV-2 efficiently and persisted for over a year.
  • The MAP platform demonstrated enhanced stability without refrigeration and reduced systemic adjuvant toxicity.
  • MAP vaccines activated skin-migratory antigen-presenting cells, indicating human translation feasibility.

Conclusions:

  • The dissolvable MAP vaccine provides effective, needle-free immunization against SARS-CoV-2.
  • This platform offers improved immunogenicity, safety, and stability compared to intramuscular vaccines.
  • The MAP technology presents a promising alternative for global infectious disease immunization efforts.