PMID- 14871295 OWN - NLM STAT- MEDLINE DCOM- 20040311 LR - 20190818 IS - 0300-9475 (Print) IS - 0300-9475 (Linking) VI - 59 IP - 2 DP - 2004 Feb TI - Interleukin-4 selectively inhibits interleukin-2 secretion by lipopolysaccharide-activated dendritic cells. PG - 183-9 AB - Dendritic cells (DCs) generated in vitro from bone marrow precursors using granulocyte-macrophage colony-stimulating factor (GM-CSF) secrete interleukin-2 (IL-2) upon activation, an event probably associated to the initiation of adaptive immune responses. Additionally, they produce IL-12, a cytokine related to T-cell polarization. To analyse the effect of IL-4 on DC differentiation and function, we assessed the capacity of murine bone marrow dendritic cells (BMDCs) differentiated with GM-CSF in the presence or absence of IL-4 to produce IL-2 and IL-12 upon lipopolysaccharide (LPS) activation. We found that although IL-4 enhanced DC IL-12p70 production, it strongly impaired IL-2 secretion by BMDCs. This inhibition, which depends on the presence of IL-4 during LPS activation, is DC specific, as IL-4 did not affect IL-2 secretion by T cells. Interestingly, inhibition of DC IL-2 production did not prevent DC priming of T lymphocytes. These results illustrate a new putative role for IL-4 on the regulation of the immune response and should help clarify the controversial reports on the effect of IL-4 on DCs. FAU - Sauma, D AU - Sauma D AD - Departamento de Biologia, Facultad de Ciencias, Universidad de Chile, Santiago, Chile. FAU - Michea, P AU - Michea P FAU - Lennon-Dumenil, A-M AU - Lennon-Dumenil AM FAU - Fierro, A AU - Fierro A FAU - Morales, J AU - Morales J FAU - Rosemblatt, M AU - Rosemblatt M FAU - Bono, M R AU - Bono MR LA - eng PT - Journal Article PT - Research Support, Non-U.S. Gov't PL - England TA - Scand J Immunol JT - Scandinavian journal of immunology JID - 0323767 RN - 0 (Interleukin-2) RN - 0 (Lipopolysaccharides) RN - 0 (Protein Subunits) RN - 0 (RNA, Messenger) RN - 187348-17-0 (Interleukin-12) RN - 207137-56-2 (Interleukin-4) SB - IM MH - Animals MH - Cell Differentiation/drug effects/immunology MH - Coculture Techniques MH - Dendritic Cells/drug effects/immunology/*metabolism MH - Female MH - Flow Cytometry MH - Interleukin-12/biosynthesis MH - Interleukin-2/*antagonists & inhibitors/biosynthesis/metabolism MH - Interleukin-4/*pharmacology MH - Lipopolysaccharides/pharmacology MH - Lymphocyte Activation/drug effects/immunology MH - Male MH - Mice MH - Mice, Inbred BALB C MH - Mice, Transgenic MH - Protein Subunits/biosynthesis MH - RNA, Messenger/chemistry/genetics MH - Reverse Transcriptase Polymerase Chain Reaction MH - T-Lymphocytes/immunology EDAT- 2004/02/12 05:00 MHDA- 2004/03/12 05:00 CRDT- 2004/02/12 05:00 PHST- 2004/02/12 05:00 [pubmed] PHST- 2004/03/12 05:00 [medline] PHST- 2004/02/12 05:00 [entrez] AID - 1380 [pii] AID - 10.1111/j.0300-9475.2004.01380.x [doi] PST - ppublish SO - Scand J Immunol. 2004 Feb;59(2):183-9. doi: 10.1111/j.0300-9475.2004.01380.x.