Issue 9, 2016

Peptide nanofiber–CaCO3 composite microparticles as adjuvant-free oral vaccine delivery vehicles

Abstract

To combat mucosal pathogens that cause gastrointestinal (GI) infections, local mucosal immunity is required which is best achieved through oral vaccination. Oral delivery of vaccines is also a safe and convenient alternative to injected vaccines due to its non-invasive nature and high compliance rate for all ages. However, the lack of effective and safe mucosal adjuvants, the selective permeability of the mucus barrier, and the harsh GI environment continue to pose a significant challenge for oral vaccine development. Microparticle-based strategies are attractive for oral vaccination due to their ability to efficiently penetrate the mucus barrier and have the added advantage of protecting the antigen in the harsh gastric environment. In this work, self-adjuvanting peptide nanofiber–CaCO3 composite microparticles were prepared and investigated for oral vaccine delivery. Compared to polymeric microparticles, inorganic CaCO3 microparticles have unique advantages due to the biocompatibility of CaCO3 as a natural mineral, mild preparation conditions, and its porous structure that is suitable for loading other materials. Particle size distribution, nanofiber loading efficiency, morphology, and degradation in simulated gastric fluid were characterized. The composite microparticles were efficient at penetrating the mucus barrier and were localized to immune inductive sites and elicited the production of mucosal antibody responses, particularly the protective IgA isotype following oral administration. The magnitude of the mucosal immune response was comparable to the gold-standard adjuvant cholera toxin B (CTB). Our results indicate that OVA-KFE8/CaCO3 composite microparticles are efficient self-adjuvanting oral vaccine delivery vehicles for induction of mucosal antibody responses.

Graphical abstract: Peptide nanofiber–CaCO3 composite microparticles as adjuvant-free oral vaccine delivery vehicles

Supplementary files

Article information

Article type
Paper
Submitted
10 ago. 2015
Accepted
22 oct. 2015
First published
22 oct. 2015

J. Mater. Chem. B, 2016,4, 1640-1649

Author version available

Peptide nanofiber–CaCO3 composite microparticles as adjuvant-free oral vaccine delivery vehicles

J. D. Snook, C. B. Chesson, A. G. Peniche, S. M. Dann, A. Paulucci, I. V. Pinchuk and J. S. Rudra, J. Mater. Chem. B, 2016, 4, 1640 DOI: 10.1039/C5TB01623A

To request permission to reproduce material from this article, please go to the Copyright Clearance Center request page.

If you are an author contributing to an RSC publication, you do not need to request permission provided correct acknowledgement is given.

If you are the author of this article, you do not need to request permission to reproduce figures and diagrams provided correct acknowledgement is given. If you want to reproduce the whole article in a third-party publication (excluding your thesis/dissertation for which permission is not required) please go to the Copyright Clearance Center request page.

Read more about how to correctly acknowledge RSC content.

Social activity

Spotlight

Advertisements