References
Query Results -- Details
MGI Accession ID: MGI:3843721
J Number: J:148184
Other Accession IDs:
Title: Early bacterial colonization induces toll-like receptor-dependent transforming growth factor beta signaling in the epithelium.
Authors: Beisswenger C; Lysenko ES; Weiser JN
Journal: Infect Immun
Volume: 77
Issue: 5
Date: 2009 May
Year: 2009
Pages: 2212-20
Review Status: Peer Reviewed
Abstract:
Colonization of the upper respiratory tract is an initial step that may lead to disease for many pathogens. To prevent compromise of the epithelial barrier, the host must monitor and tightly control bacterial levels on the mucosa. Here we show that innate immune functions of respiratory epithelial cells control colonization by Streptococcus pneumoniae and Haemophilus influenzae in a Toll-like receptor (TLR)-dependent manner. Activation of inflammatory pathways, including mitogen-activated protein kinase signaling, in respiratory epithelial cells was accompanied by the induction of the transforming growth factor beta signaling cascade during early colonization. Thus, colonization resulted in upregulation of factors involved in a proinflammatory response (e.g., interleukin-6) as well as factors known to modulate the epithelial barrier (e.g., Snail-1). These in vivo data provided a link between inflammation control and maintenance of the mucosal barrier function during infection and emphasized the importance of TLR-dependent inflammatory responses of the respiratory epithelium.
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