Development of a Microbead Whole Cell Delivery System for Oral Immunization against traveler's diarrhea

Award Information
Agency:
Department of Defense
Branch
Army
Amount:
$68,112.00
Award Year:
2001
Program:
SBIR
Phase:
Phase I
Contract:
DAMD17-01-C-0026
Agency Tracking Number:
A002-1573
Solicitation Year:
n/a
Solicitation Topic Code:
n/a
Solicitation Number:
n/a
Small Business Information
ANTEX BIOLOGOCIS, INC.
300 Professional Drive, Gaithersburg, MD, 20879
Hubzone Owned:
N
Socially and Economically Disadvantaged:
N
Woman Owned:
N
Duns:
189488554
Principal Investigator:
Richard Walker
Director
(301) 590-0129
rwalker@antexbiologics.com
Business Contact:
Larry Ellingsworth
Vice President
(301) 590-0129
ellingsworthl@antexbiologics.com
Research Institution:
n/a
Abstract
Antex biologics is developing inactivated whole cell vaccines for oral delivery to prevent infections by bacteria causing traveler's diarrhea. A new, possibly breakthrough, microbead formulation technology is being developed which should be evaluated forits potential to enhance these inactivated whole cell vaccines. These beads should improve the safety, stability and immunogenicity as well as ease of administration of the whole cell vaccine. In this Phase I SBIR, Campylobacter jejuni, a major cause ofdiarrhea, will be prepared as a dry formulation by spray-coating the inactivated bacterial cells onto a sugar/starch microbead core and then covering the antigen-coated core with a methacrylic acid copolymer. The microbeads will be insoluble at gastricpH, but will be readily soluble at higher (intestinal) pH. This formulation will be tested for its oral immunogenicity and efficacy in a mouse model Antex has developed.This effort should provide a means to better achieve immunoprotection against entericinfections, for which no vaccines are now available. It may also establish an approach for more effective oral vaccines against a broad range of infections. Potential populations for use of such a product include deployed military personnel, internationaltravelers, and global and national public health and child immunization programs.

* information listed above is at the time of submission.

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