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Immunology research sheds new light on cell function, response
Date:1/16/2013

MANHATTAN, Kan. -- A Kansas State University-led study has uncovered new information that helps scientists better understand the complex workings of cells in the innate immune system. The findings may also lead to new avenues in disease control and prevention.

Philip Hardwidge, associate professor of diagnostic medicine and pathobiology, was the study's principal investigator. He and colleagues looked at the relationship between a bacterial protein and the innate immune system -- a system of defensive cells that responds rapidly to an infection in a nonspecific manner.

Among their findings, the researchers characterized a new protein that affects how cells in the innate immune system function and protect humans against invading bacteria such as E. coli O157:H7. The study, "NleB, a Bacterial Effector with Glycosyltransferase Activity, Targets GAPDH Function to Inhibit NF-kappaB Activation," was published in the most recent issue of the scientific journal Cell Host and Microbe. The National Institutes of Health's National Institute of Allergy and Infectious Diseases funded the study.

Hardwidge conducted the study with lead author Xiaofei Gao, a doctoral student at the University of Kansas Medical Center and now employed as a postdoctoral fellow at the Whitehead Institute; and with Thanh Pham and Leigh Ann Feuerbacher, postdoctoral research fellows in diagnostic medicine and pathobiology at Kansas State University. Colleagues at the University of Kansas Medical Center; the Institute of Infectiology in Muenster, Germany; and the Stowers Institute for Medical Research also contributed to the study.

The research team studied a bacterium that infects mice, named Citrobacter rodentium. The bacterium is similar to E. coli O157:H7, which causes diarrheal illness in humans. Both bacteria use the protein NleB to inhibit the innate immune system from fighting the bacteria.

"NleB is very important to t
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Contact: Philip Hardwidge
philiphardwidge@k-state.edu
785-532-2506
Kansas State University
Source:Eurekalert

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