A low-invasive and effective transcutaneous immunization system using a novel dissolving microneedle array for
Kazuhiko Matsuo1, Yayoi Yokota, You Zhai
1Department of Biotechnology and Therapeutics, Graduate School of Pharmaceutical Sciences, Osaka University, 1-6 Yamadaoka, Suita, Osaka 565-0871, Japan.
Summary
A novel dissolving microneedle array offers a needle-free transcutaneous immunization (TCI) method effective for both soluble and particulate vaccine antigens. This safe and simple TCI system induces robust immune responses comparable to traditional vaccination.
Area of Science:
- Biotechnology
- Immunology
- Materials Science
Background:
- Transcutaneous immunization (TCI) is a needle-free vaccination approach.
- Current TCI systems are limited to soluble antigens and cannot effectively induce immune responses against particulate antigens.
Purpose of the Study:
- To develop a novel TCI system capable of delivering both soluble and particulate antigens.
- To evaluate the efficacy and safety of a dissolving microneedle array for TCI.
Main Methods:
- Fabrication of dissolving microneedle arrays from hyaluronate with lengths of 200, 300, and 800 μm.
- Application of TCI using the dissolving microneedle arrays with both soluble and particulate antigens in rats.
- Assessment of immune responses and skin irritation.
Main Results:
- The dissolving microneedle arrays effectively delivered both soluble and particulate antigens beneath the stratum corneum.
- TCI with these microneedles induced immune responses comparable to subcutaneous immunization, irrespective of antigen form.
- The microneedle application resulted in minimal skin irritation.
Conclusions:
- A novel dissolving microneedle array TCI system effectively delivers all antigen forms.
- This TCI system provides a safe, simple, and effective method for enhancing protective immune responses.
- The technology holds promise for improving vaccine delivery and efficacy.
