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A pilot study using a novel pyrotechnically driven prototype applicator for epidermal powder immunization in piglets.

Julia Engert1, Cihad Anamur1, Laura Engelke1

  • 1Department of Pharmacy, Pharmaceutical Technology & Biopharmaceutics, Ludwig-Maximilians-University Munich, Butenandtstr. 5, D-81377 Munich, Germany.

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Summary
This summary is machine-generated.

Epidermal powder immunization (EPI) offers a needle-free alternative for vaccine delivery. This study demonstrated that a novel pyrotechnic applicator can effectively deliver a dried influenza vaccine powder to induce anti-H1N1 antibody responses in piglets.

Keywords:
Epidermal powder immunizationH1N1 vaccineantibody responsein vivopig

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Area of Science:

  • Vaccinology
  • Biotechnology
  • Dermatology

Background:

  • Traditional needle-and-syringe immunization poses challenges, including needle phobia and biohazard waste.
  • Epidermal powder immunization (EPI) presents a promising alternative, leveraging the skin's outer layers for antigen delivery.

Purpose of the Study:

  • To evaluate the efficacy of a novel pyrotechnic applicator for delivering a dried influenza vaccine via EPI.
  • To assess the ability of the applicator to breach the stratum corneum and elicit an immune response.

Main Methods:

  • Influenza vaccine (Pandemrix®) was concentrated, freeze-dried, and cryo-milled into a powder.
  • The powder was loaded onto a novel pyrotechnic applicator with oily adjuvants.
  • Piglets received two immunizations via the applicator or intramuscular injection.
  • Anti-H1N1 antibody titers were measured using ELISA.

Main Results:

  • The pyrotechnic applicator successfully accelerated dried vaccine powder to supersonic speeds.
  • Particle impact was sufficient to penetrate the stratum corneum of piglet skin.
  • Immunization with the dried vaccine powder via EPI generated measurable anti-H1N1 antibody titers.

Conclusions:

  • A novel pyrotechnic applicator enables effective EPI of a dried influenza vaccine.
  • This needle-free approach successfully induced specific antibody responses in vivo.
  • EPI using pyrotechnic delivery shows potential as an alternative immunization strategy.