| Literature DB >> 8094929 |
R Edelman1, R G Russell, G Losonsky, B D Tall, C O Tacket, M M Levine, D H Lewis.
Abstract
We have searched for an effective oral delivery system for a purified enterotoxigenic Escherichia coli (ETEC) fimbrial adhesin, CFA/I, which elicits anti-colonization immunity. Purified CFA/I antigen encapsulated in biodegradable polymer microspheres of poly (DL-lactide-co-glycolide) (PLG) induced a vigorous, systemic CFA/I IgG antibody response in rabbits immunized once via intragastric tube; oral, unencapsulated CFA/I induced little or no circulating antibody. CFA/I-specific, S-IgA coproantibody was detected in one of three rabbits fed with the CFA/I-PLG microsphere vaccine. We conclude that PLG microspheres protected CFA/I from degradation in the stomach and effectively delivered the antigen for processing by the host's immune system.Entities:
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Year: 1993 PMID: 8094929 DOI: 10.1016/0264-410x(93)90012-m
Source DB: PubMed Journal: Vaccine ISSN: 0264-410X Impact factor: 3.641