Salmonella typhimurium and lipopolysaccharide stimulate extracellularly regulated kinase activation in macrophages by a mechanism involving phosphatidylinositol 3-kinase and phospholipase D as novel intermediates

Citation
Kj. Procyk et al., Salmonella typhimurium and lipopolysaccharide stimulate extracellularly regulated kinase activation in macrophages by a mechanism involving phosphatidylinositol 3-kinase and phospholipase D as novel intermediates, INFEC IMMUN, 67(3), 1999, pp. 1011-1017
Citations number
49
Categorie Soggetti
Immunology
Journal title
INFECTION AND IMMUNITY
ISSN journal
00199567 → ACNP
Volume
67
Issue
3
Year of publication
1999
Pages
1011 - 1017
Database
ISI
SICI code
0019-9567(199903)67:3<1011:STALSE>2.0.ZU;2-I
Abstract
Activation of the extracellularly regulated kinase (ERK) pathway is part of the early biochemical events that follow lipopolysaccharide (LPS) treatmen t of macrophages or their infection by virulent and attenuated Salmonella s trains. Phagocytosis as well as the secretion of invasion-associated protei ns is dispensable for ERK activation by the pathogen. Furthermore, the path ways used by Salmonella and LPS to stimulate ERK are identical, suggesting that kinase activation might be solely mediated by LPS. Both stimuli activa te ERK by a mechanism involving herbimycin-dependent tyrosine kinase(s) and phosphatidylinositol 3-kinase. Phospholipase D activation and stimulation of protein kinase C appear to be intermediates in this novel pathway of MEK /ERK activation.