Abstract:
:Acute and chronic airway inflammations caused by environmental agents including endotoxin represent an increasing health problem. Local TNF production may contribute to lung dysfunction and inflammation, although pulmonary neutrophil recruitment occurs in the absence of TNF. First, we demonstrate that membrane-bound TNF is sufficient to mediate the inflammatory responses to lipopolysaccharide (LPS). Secondly, using cell type-specific TNF-deficient mice we show that TNF derived from either macrophage/neutrophil (M/N) or T lymphocytes have differential effects on LPS-induced respiratory dysfunction (enhanced respiratory pause, Penh) and pulmonary neutrophil recruitment. While Penh, vascular leak, neutrophil recruitment, TNF, and thymus- and activation-regulated chemokine/CCL17 (TARC) expression in the lung were reduced in M/N-deficient mice, T cell-specific TNF-deficient mice displayed augmented Penh, vascular leak, neutrophil influx, increased CD11c+ cells and expression of TNF, TARC and murine CXC chemokines KC/CXCL1 in the lung. In conclusion, inactivation of TNF in either M/N or T cells has differential effects on LPS-induced lung disease, suggesting that selective deletion of TNF in T cells may aggravate airway pathology.
journal_name
Eur J Immunoljournal_title
European journal of immunologyauthors
Togbe D,Grivennikov SI,Noulin N,Couillin I,Maillet I,Jacobs M,Maret M,Fick L,Nedospasov SA,Quesniaux VF,Schnyder B,Schnyder-Candrian Sdoi
10.1002/eji.200636371subject
Has Abstractpub_date
2007-03-01 00:00:00pages
768-79issue
3eissn
0014-2980issn
1521-4141journal_volume
37pub_type
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