PMID- 17931392 OWN - NLM STAT- MEDLINE DCOM- 20080219 LR - 20240316 IS - 1365-2249 (Electronic) IS - 0009-9104 (Print) IS - 0009-9104 (Linking) VI - 151 IP - 1 DP - 2008 Jan TI - Tumour necrosis factor-alpha blockade suppresses murine allergic airways inflammation. PG - 114-22 AB - Asthma is a heterogeneous disease that has been increasing in incidence throughout western societies and cytokines, including proinflammatory tumour necrosis factor alpha (TNF-alpha), have been implicated in the pathogenesis of asthma. Anti-TNF-alpha therapies have been established successfully in the clinic for diseases such as rheumatoid arthritis and Crohn's disease. TNF-alpha-blocking strategies are now being trialled in asthma; however, their mode of action is poorly understood. Based on the observation that TNF-alpha induces lymph node hypertrophy we have attempted to investigate this as a mechanism of action of TNF-alpha in airway inflammation by employing two models of murine airway inflammation, that we have termed short and long models, representing severe and mild/moderate asthma, respectively. The models differ by their immunization schedules. In the short model, characterized by eosinophilic and neutrophilic airway inflammation the effect of TNF-alpha blockade was a reduction in draining lymph node (DLN) hypertrophy, eosinophilia, interleukin (IL)-5 production and immunoglobulin E (IgE) production. In the long model, characterized by eosinophilic inflammation, TNF-alpha blockade produced a reduction in DLN hypertrophy and IL-5 production but had limited effects on eosinophilia and IgE production. These results indicate that anti-TNF-alpha can suppress DLN hypertrophy and decrease airway inflammation. Further investigations showed that anti-TNF-alpha-induced inhibition of DLN hypertrophy cannot be explained by preventing l-selectin-dependent capture of lymphocytes into the DLN. Given that overall TNF blockade was able to suppress the short model (severe) more effectively than the long model (mild/moderate), the results suggest that TNF-alpha blocking therapies may be more effective in the treatment of severe asthma. FAU - Hutchison, S AU - Hutchison S AD - Centre for Biophotonics, Strathclyde Institute of Pharmacy and Biomedical Sciences, University of Strathclyde, Glasgow, UK. s.hutchison@strath.ac.uk FAU - Choo-Kang, B S W AU - Choo-Kang BS FAU - Bundick, R V AU - Bundick RV FAU - Leishman, A J AU - Leishman AJ FAU - Brewer, J M AU - Brewer JM FAU - McInnes, I B AU - McInnes IB FAU - Garside, P AU - Garside P LA - eng PT - Journal Article DEP - 20071011 PL - England TA - Clin Exp Immunol JT - Clinical and experimental immunology JID - 0057202 RN - 0 (Cytokines) RN - 0 (Immunoglobulin G) RN - 0 (Receptors, Tumor Necrosis Factor) RN - 0 (Tumor Necrosis Factor-alpha) RN - 9006-59-1 (Ovalbumin) RN - OP401G7OJC (Etanercept) SB - IM MH - Adoptive Transfer/methods MH - Animals MH - Asthma/*immunology/pathology MH - Bronchial Hyperreactivity/immunology MH - Cytokines/*immunology MH - Eosinophilia MH - Etanercept MH - Flow Cytometry MH - Hypertrophy MH - Immunoglobulin G/*therapeutic use MH - Lung/*immunology/pathology MH - Lymph Nodes/immunology/pathology MH - Mice MH - Mice, Inbred BALB C MH - Models, Animal MH - Ovalbumin MH - Receptors, Tumor Necrosis Factor/*therapeutic use MH - T-Lymphocytes/*immunology MH - Time MH - Tumor Necrosis Factor-alpha/*antagonists & inhibitors PMC - PMC2276921 EDAT- 2007/10/13 09:00 MHDA- 2008/02/20 09:00 PMCR- 2009/01/01 CRDT- 2007/10/13 09:00 PHST- 2007/10/13 09:00 [pubmed] PHST- 2008/02/20 09:00 [medline] PHST- 2007/10/13 09:00 [entrez] PHST- 2009/01/01 00:00 [pmc-release] AID - CEI3509 [pii] AID - 10.1111/j.1365-2249.2007.03509.x [doi] PST - ppublish SO - Clin Exp Immunol. 2008 Jan;151(1):114-22. doi: 10.1111/j.1365-2249.2007.03509.x. Epub 2007 Oct 11.