Bacterial Virulence by P. Sansonetti

By P. Sansonetti

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Azurophilic granules are spherical or ellipsoid in shape and contain MPO. There are two subpopulations: one is poor in defensins and is made early in myeloid differentiation, while the second subpopulation is rich in defensins. Both subpopulations contain MPO, α-defensins, bactericidal/permeability-increasing protein (BPI), seprocidins and azurocidin. 3), MPO is a peroxidase which catalyzes the production of HOCl. α-Defensins are small cationic peptides and represent 5% of the granule content. Four α-defensins are found in primary granules: human neutrophil peptide -1, -2, -3 and -4 (HNP-1, -2, -3 and -4).

Moreover, NFκB activation in epithelial, inflammatory and mesenchymal cells may enhance COX2 production. Finally, our recent finding suggested the involvement of NFκB in H. pylori-induced mutagenesis [25]. Levels of IL-6 and IL-11 are also increased in the H. pylori-induced gastritis mucosa. Giraud et al. demonstrated the development of gastric cancer as a result of constitutive activation of STAT3 in mice, suggesting the importance of IL-6 and/ or IL-11 signaling in the development of gastric cancer [26, 27].

Rev. , 5 (8), 577–582. , et al. (2007) Novel cell death program leads to neutrophil extracellular traps. J. Cell. , 176 (2), 231–241. G. (1958) Bactericidal action of histone. J. Exp. , 108 (6), 925–944. 18 Berliner, N. (2008) Lessons from congenital neutropenia: 50 years of progress in understanding myelopoiesis. Blood, 111 (12), 5427–5432. S. (2008) Neutropenia in pediatric practice. Pediatr. , 29 (1), 12–23; quiz 24. C. (2007) Disorders of neutrophil function: an overview. Methods Mol. , 412, 489–504.

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