PMID- 17267762 OWN - NLM STAT- MEDLINE DCOM- 20070604 LR - 20191210 IS - 0741-5400 (Print) IS - 0741-5400 (Linking) VI - 81 IP - 4 DP - 2007 Apr TI - Artificially generated dendritic cells misdirect antiviral immune responses. PG - 952-6 AB - Dendritic cells (DCs) are critical to the outcome of many viral infections. Questions still remain as to the relevance of artificially generated DCs in models of in vivo immune responses. We compared different DC generation pathways, in terms of phenotypic expression, cytokine production, apoptosis, and T cell proliferation, following viral infection. Direct viral infection of monocytes or monocytes cultured with supernatants from virally infected lung epithelial cells (A549 DCs) induce distinct DC subsets compared with viral infection of artificially generated IL-4 DCs and IFN-DCs. These virally infected DC subsets stimulated different cytokine secretion profiles and displayed contrasting sensitivities to viral-induced apoptosis. It is most interesting that we observed marked differences in the proliferation of purified CD3+ T cells from the virally infected DC subsets. In conclusion, artificially generated DCs skew immune responses to viral infections, and direct viral infection of monocytes and DCs, generated from monocytes cultured with supernatants from infected epithelial cells, appears to be a more relevant pathway of producing DCs, which mimic those generated in vivo. FAU - Noone, Cariosa AU - Noone C AD - Viral Immunology Group, School of Biotechnology, Dublin City University, Dublin 9, Ireland. FAU - Manahan, Ellen AU - Manahan E FAU - Newman, Robert AU - Newman R FAU - Johnson, Patricia AU - Johnson P LA - eng PT - Evaluation Study PT - Journal Article DEP - 20070131 PL - England TA - J Leukoc Biol JT - Journal of leukocyte biology JID - 8405628 RN - 0 (Antigens, Differentiation) RN - 0 (CD3 Complex) RN - 0 (Cytokines) RN - 0 (Interferon-alpha) RN - 207137-56-2 (Interleukin-4) SB - IM MH - Antigens, Differentiation/*metabolism MH - Apoptosis MH - CD3 Complex/metabolism MH - Cell Differentiation MH - Cell Line MH - Cell Proliferation MH - Cytokines/metabolism MH - Dendritic Cells/*immunology/virology MH - Humans MH - *Immunity, Cellular MH - Interferon-alpha/pharmacology MH - Interleukin-4/pharmacology MH - Monocytes/immunology/physiology/*virology MH - Respirovirus Infections/immunology MH - Tissue Culture Techniques/*methods EDAT- 2007/02/03 09:00 MHDA- 2007/06/05 09:00 CRDT- 2007/02/03 09:00 PHST- 2007/02/03 09:00 [pubmed] PHST- 2007/06/05 09:00 [medline] PHST- 2007/02/03 09:00 [entrez] AID - jlb.1006615 [pii] AID - 10.1189/jlb.1006615 [doi] PST - ppublish SO - J Leukoc Biol. 2007 Apr;81(4):952-6. doi: 10.1189/jlb.1006615. Epub 2007 Jan 31.