PMID- 11846225 OWN - NLM STAT- MEDLINE DCOM- 20020726 LR - 20061115 IS - 0171-2985 (Print) IS - 0171-2985 (Linking) VI - 204 IP - 5 DP - 2001 Dec TI - Defense against influenza A virus infection: essential role of the chemokine system. PG - 603-13 AB - Monocytes/macrophages are highly susceptible to an infection with influenza A virus. After infection, de novo virus protein synthesis is detectable but rapidly interrupted before completion of the first viral replication cycle. Within 24-48 hours the infected monocytes die by apoptosis. Before cell death, infected monocytes initiate a cell-specific immune response. This includes the transcription and subsequent release of TNF-alpha (tumor necrosis factor alpha), IL-1beta (Interleukin 1beta), IL-6, type I inferferons and CC chemokines. Enhanced cytokine mRNA expression is due to a prolonged mRNA stability and an augmented gene transcription. Activation of transcription factors such as NF-kappaB (nuclear factor kappaB) and AP-1 are involved in activation of cytokine mRNA transcription. Infection of monocytes with influenza A virus induces the selective expression of mononuclear leukocyte attracting chemokines, such as MCP-1 (monocyte chemotactic protein 1), MIP-1alpha (macrophage inflammatory protein 1alpha) and RANTES (regulated upon activation, normal T cell expressed and secreted). In striking contrast, the release of the neutrophil-specific chemokines IL-8 (interleukin 8) and GRO-alpha (growth stimulatory activity alpha) is entirely suppressed. This differentially regulated chemokine expression may explain the mononuclear cell infiltrate characteristic for virus-infected tissue. Thus, infection of monocytes/macrophages with influenza A virus primes for a rapid proinflammatory reaction and induces an enhanced immigration of mononuclear cells into infected tissue. Taken together, these mechanisms may prepare the infected host for a fast and virus-specific immune response. FAU - Kaufmann, A AU - Kaufmann A AD - Institute of Immunology, Philipps-University, Marburg, Germany. kaufmana@mailer.uni-marburg.de FAU - Salentin, R AU - Salentin R FAU - Meyer, R G AU - Meyer RG FAU - Bussfeld, D AU - Bussfeld D FAU - Pauligk, C AU - Pauligk C FAU - Fesq, H AU - Fesq H FAU - Hofmann, P AU - Hofmann P FAU - Nain, M AU - Nain M FAU - Gemsa, D AU - Gemsa D FAU - Sprenger, H AU - Sprenger H LA - eng PT - Journal Article PT - Research Support, Non-U.S. Gov't PT - Review PL - Netherlands TA - Immunobiology JT - Immunobiology JID - 8002742 RN - 0 (Chemokines) SB - IM MH - Animals MH - Chemokines/*immunology MH - Humans MH - Influenza A virus/*immunology MH - Influenza, Human/*immunology MH - Monocytes/immunology RF - 31 EDAT- 2002/02/16 10:00 MHDA- 2002/07/27 10:01 CRDT- 2002/02/16 10:00 PHST- 2002/02/16 10:00 [pubmed] PHST- 2002/07/27 10:01 [medline] PHST- 2002/02/16 10:00 [entrez] AID - S0171-2985(04)70048-0 [pii] AID - 10.1078/0171-2985-00099 [doi] PST - ppublish SO - Immunobiology. 2001 Dec;204(5):603-13. doi: 10.1078/0171-2985-00099.