TY - JOUR
T1 - Peptide nanofiber-CaCO3 composite microparticles as adjuvant-free oral vaccine delivery vehicles
AU - Snook, Joshua D.
AU - Chesson, Charles B.
AU - Peniche, Alex G.
AU - Dann, Sara M.
AU - Paulucci, Adriana
AU - Pinchuk, Iryna V.
AU - Rudra, Jai S.
N1 - Publisher Copyright:
© 2016 The Royal Society of Chemistry.
PY - 2016
Y1 - 2016
N2 - 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.
AB - 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.
UR - http://www.scopus.com/inward/record.url?scp=84959423228&partnerID=8YFLogxK
U2 - 10.1039/c5tb01623a
DO - 10.1039/c5tb01623a
M3 - Article
AN - SCOPUS:84959423228
SN - 2050-7518
VL - 4
SP - 1640
EP - 1649
JO - Journal of Materials Chemistry B
JF - Journal of Materials Chemistry B
IS - 9
ER -