Microfluidic-prepared DOTAP nanoparticles induce strong T-cell responses in mice

Autoři: Yasunari Haseda aff001;  Lisa Munakata aff002;  Jie Meng aff001;  Ryo Suzuki aff002;  Taiki Aoshi aff001
Působiště autorů: Vaccine Dynamics Project, BIKEN Innovative Vaccine Research Alliance Laboratories, Research Institute for Microbial Diseases, Osaka University, Suita, Osaka, Japan aff001;  Laboratory of Drug and Gene Delivery Research, Faculty of Pharma-Science, Teikyo University, Itabashi-ku, Tokyo, Japan aff002;  Vaccine Dynamics Project, BIKEN Center for Innovative Vaccine Research and Development, The Research Foundation for Microbial Diseases of Osaka University, Suita, Osaka, Japan aff003
Vyšlo v časopise: PLoS ONE 15(1)
Kategorie: Research Article
doi: https://doi.org/10.1371/journal.pone.0227891


For the induction of antigen-specific T-cell responses by vaccination, an appropriate immune adjuvant is required. Vaccine adjuvants generally provide two functions, namely, immune potentiator and delivery, and many adjuvants that can efficiently induce T-cell responses are known to have the combination of these two functions. In this study, we explored a cationic lipid DOTAP-based adjuvant. We found that the microfluidic preparation of DOTAP nanoparticles induced stronger CD4+ and CD8+ T-cell responses than liposomal DOTAP. The further addition of Type-A CpG D35 in DOTAP nanoparticles increased the induction of T-cell responses, particularly in CD4+ T cells. Further investigations revealed that the size of DOTAP nanoparticles, prepared buffer conditions, and physicochemical interaction with vaccine antigen are important factors for the efficient induction of T-cell responses with a relatively small antigen dose. These results suggested that microfluidic-prepared DOTAP nanoparticles plus D35 are a promising adjuvant for a vaccine that induces therapeutic T-cell responses for treating cancer and infectious diseases.

Klíčová slova:

Antigens – Cytotoxic T cells – Enzyme-linked immunoassays – Immune response – Immunologic adjuvants – Lipids – Nanoparticles – T cells


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