Though the new vaccine has not yet been applied to clinical trials in humans, it has worked well in preclinical studies, the results of which the team reports in the latest issue of the journal Angewandte Chemie.
"The vaccine provided outstanding protection," says author Kim Janda, Ph.D., who holds the Ely R. Callaway, Jr. Chair in Chemistry at TSRI.
A Rapid and Deadly Disease
Sepsis, also known as septic shock and systemic inflammatory response syndrome, is characterized by shock to one's organs following poisoning with endotoxins--chemical components of certain bacteria. The endotoxin molecules themselves are not particularly harmful, but the way that the immune system reacts to them is.
When bacteria like the deadly N. meningitidis invade the body, they trigger the immune system to stage a biochemical defense. One of the ways that the body initially responds to such an infection is to recruit white blood cells, like macrophages, which engulf the pathogens and destroy them. The macrophages also fight the pathogens by producing chemicals at the site of an infection that induce inflammation.
However, there is a limit to how much inflammation a body can take. If the infection is widespread, the systemic endotoxin levels can be so high that the macrophages respond by producing a lethal amount of inflammatory chemicals. One of these chemicals is called tumor necrosis factor alpha (TNF-alpha).
The prognosis for sepsis is dire. It can affect many parts of the body, from the bones to the brain, and death due to septic shock can occur in a matter of hours. According to the National Institutes of Health, two percent of
Contact: Jason Bardi
Scripps Research Institute