Related Experiment Videos
DNA vaccines against enteric infections
1Division of Infectious Diseases, Tufts University, Cummings School of Veterinary Medicine, North Grafton, MA 01536, USA. John.Herrmann@tufts.edu
Vaccine
|August 13, 2005
Summary
DNA vaccines offer protection against infectious diseases. Oral administration of DNA vaccines shows promise for enteric infections, targeting mucosal tissues effectively in animal models.
Area of Science:
- Immunology
- Vaccinology
- Molecular Biology
Background:
- DNA vaccines, first described in 1993, induce protective immune responses against various infectious agents.
- Previous research demonstrated DNA vaccine efficacy for enteric infections caused by viral, bacterial, and parasitic agents.
- Current DNA vaccine delivery methods include intramuscular injection and gene gun delivery.
Purpose of the Study:
- To explore the potential of oral administration for DNA vaccines.
- To target enteric mucosal tissues for enhanced vaccine delivery and efficacy.
- To review advancements in oral DNA vaccine strategies for enteric infections.
Main Methods:
- Encapsulation of plasmid DNA in polymeric microparticles for oral delivery.
- Utilizing live bacterial vectors to deliver DNA vaccines orally.
- Evaluation of efficacy in animal models for specific enteric pathogens.
Main Results:
- Oral DNA vaccines encapsulated in microparticles were effective against rotavirus in animal models.
- DNA vaccines delivered via live bacterial vectors showed efficacy against Listeria monocytogenes in animal models.
- Oral administration targets vaccines to enteric mucosal tissues, offering a convenient delivery method.
Conclusions:
- Oral administration of DNA vaccines is a viable strategy for targeting enteric mucosal immunity.
- Encapsulated DNA and bacterial vector delivery systems show promise for oral enteric DNA vaccines.
- While human trials are pending, veterinary vaccine trials indicate positive outcomes.