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Tips from the American Journal of Pathology
Date:3/24/2009

gut. These bacteria contribute to digestion, but also may cause disease. Some bacteria, such as Escheria coli (E. coli) or Citrobacter rodentium (C. rodentium), can breach the intestinal epithelial barrier, entering the blood and causing systemic infection.

Lymphostatin, a toxin produced by gram negative bacteria including E. coli and C. rodentium, has been associated with bacterial virulence. To determine if lymphostatin affects epithelial barrier integrity, Babbin et al generated two strains of C. rodentium, CrGIM21 and CrPrM5, with different mutations in lymphostatin. Whereas wild-type C. rodentium disrupted epithelial barrier function, CrGIM21 and CrPrM5 had reduced effects on two aspects of epithelial cell function. These data suggest that lymphostatin may be a strong target candidate for treatment of enteric gram negative bacteria.

Dr. Klapporth and colleagues postulate that "therapeutic interventions in form of specific immunoglobulins directed against lymphostatin and its enzymatic activities might provide an attractive alternative to antibiotics in treating intestinal injury and preventing extraintestinal manifestations of Gram negative infection."

Babbin BA, Sasaki M, Gerner-Schmidt KW, Nusrat A, Klapproth J-M A: The bacterial virulence factor lymphostatin compromises intestinal epithelial barrier function by modulating Rho GTPases. Am J Pathol 2009, 174: 1347-1357


Mouse Model of Human Psoriasis

Researchers led by Nicole Ward at Case Western Reserve University, Cleveland have developed a new mouse model to study human psoriasis. These findings are presented in the April 2009 issue of The American Journal of Pathology.

Psoriasis is a chronic inflammatory disease that causes red scaly patches to appear on the skin. It is characterized by excessive skin production, formation of new blood vessels, and the presence
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Contact: Angela Colmone
acolmone@asip.org
301-634-7953
American Journal of Pathology
Source:Eurekalert

Page: 1 2 3 4 5

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