Transcutaneous immunization with heat-labile enterotoxin: development of a needle-free vaccine patch.

Abstract:

:The skin is an attractive target for vaccine delivery. Adjuvants and antigens delivered into the skin can result in potent immune responses and an unmatched safety profile. The heat-labile enterotoxin (LT) from Escherichia coli, which acts both as antigen and adjuvant, has been shown to be delivered to human skin efficiently when used in a patch, resulting in strong immune responses. Iomai scientists have capitalized on these observations to develop late-stage products based on LT. This has encouraged commercial-level product development of a delivery system that is efficient, user-friendly and designed to address important medical needs. Over the past 2 years, extensive clinical testing and optimization has allowed the patch to evolve to a late-stage product. As a strategy for approval of a revolutionary vaccine-delivery system, the singular focus on optimization of LT delivery has enabled technical progress to extend patch-vaccine product development beyond LT. The field efficacy of the LT-based travelers' diarrhea vaccine has validated this approach. The discussion of transcutaneous immunization is unique, in that any consideration of the adjuvant must also include delivery, and the significant advances in a commercial patch application system are described. In this review, we integrate these concepts, update the clinical data and look to the future.

journal_name

Expert Rev Vaccines

authors

Glenn GM,Flyer DC,Ellingsworth LR,Frech SA,Frerichs DM,Seid RC,Yu J

doi

10.1586/14760584.6.5.809

subject

Has Abstract

pub_date

2007-10-01 00:00:00

pages

809-19

issue

5

eissn

1476-0584

issn

1744-8395

journal_volume

6

pub_type

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