Nanopatch-targeted skin vaccination against West Nile virus and chikungunya virus in mice

Tarl W. Prow, Xianfeng Chen, Natalie A. Prow, Germain J P Fernando, Cindy S E Tan, Anthony P. Raphael, David Chang, Merja P. Ruutu, Derek W K Jenkins, Alyssa Pyke, Michael L. Crichton, Kristin Raphaelli, Lucas Y H Goh, Ian H. Frazer, Michael S. Roberts, Joy Gardner, Alexander A. Khromykh, Andreas Suhrbier, Roy A. Hall, Mark A F Kendall

Research output: Contribution to journalArticlepeer-review

148 Citations (Scopus)


The 'Nanopatch' (NP) comprises arrays of densely packed projections with a defined geometry and distribution designed to physically target vaccines directly to thousands of epidermal and dermal antigen presenting cells (APCs). These miniaturized arrays are two orders of magnitude smaller than standard needles - which deliver most vaccines-and are also much smaller than current microneedle arrays. The NP is dry-coated with antigen, adjuvant, and/or DNA payloads. After the NP was pressed onto mouse skin, a protein payload co-localized with 91.4 ±4.1 APC mm-2 (or 2925 in total) representing 52% of the delivery sites within the NP contact area, agreeing well with a probability-based model used to guide the device design; it then substantially increases as the antigen diffuses in the skin to many more cells. APC colocalizing with protein payloads rapidly disappear from the application area, suggesting APC migration. The NP also delivers DNA payloads leading to cutaneous expression of encoded proteins within 24 h. The efficiency of NP immunization is demonstrated using an inactivated whole chikungunya virus vaccine and a DNA-delivered attenuated West Nile virus vaccine. The NP thus offers a needle-free, versatile, highly effective vaccine delivery system that is potentially inexpensive and simple to use.

Original languageEnglish
Pages (from-to)1776-1784
Number of pages9
Issue number16
Publication statusPublished - 12 Aug 2010


  • Immunology
  • Medicine
  • Microstructures
  • Transcutaneous
  • Vaccine delivery

ASJC Scopus subject areas

  • Biomaterials
  • Engineering (miscellaneous)
  • Biotechnology
  • Medicine(all)


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