Yale Researchers Trick Bacteria to Deliver a Safer Vaccine
News Mar 19, 2013
The findings suggest new ways to create novel vaccines that effectively combat disease but can be tolerated by children, the elderly, and the immune-compromised who might be harmed by live vaccines.
“We have managed to assemble a functional protein-injection machine within bacterial mini-cells, and the amazing thing is that it works,” said Jorge Galan, senior author of the paper and the Lucille P. Markey Professor of Microbial Pathogenesis and chair of the Section of Microbial Pathogenesis at Yale.
Galan’s team has assembled the molecular machine used by Salmonella to cause food poisoning or typhoid fever. Scientists have been successful in modifying this protein injection machine to trigger a protective immune response against a variety of infectious diseases. However, it has been necessary to use modified or virulence-attenuated bacteria that carry this machine.
The new trick exploits a mutation that causes bacteria to create “mini-cells” when they improperly divide. Mini-cells contain no DNA and, therefore, are not pathogenic and extremely safe. Galan’s team was able to assemble the protein-injection machines within these bacterial cells, which when administered to mice, deliver antigens that trigger an immune response without causing an infection.
The system could be used to combat cancer as well as a wide variety of infectious diseases, Galan said.
Heather A. Carleton is lead author of the paper. Other Yale authors include Maria Lara-Tejero and Xiaoyun Liu.
The research was funded by the National Institutes of Health.
Scientists Report The Development of a Potent New Medicine to Fight AddictionNews
Scientists report the development of a potent new medicine to fight addiction.READ MORE
Evolution Threatens Efficient Bioproduction Scale-UpNews
The transition towards sustainable biobased chemical production is important for green growth, but productivity and yield of engineered cells frequently decrease in large industry-scale fermentation. According to a new study, the role of evolution has been underestimated in limiting bioprocesses.
Blood Cancers are Outsmarting the Immune System, But How?News
Researchers have discovered how some of the blood cancers known as myeloproliferative neoplasms (MPNs) evade the immune system.READ MORE
Comments | 0 ADD COMMENT
World Advanced Therapies & Regenerative Medicine Congress
May 16 - May 18, 2018