PMID- 19394592 OWN - NLM STAT- MEDLINE DCOM- 20090612 LR - 20131121 IS - 1090-2163 (Electronic) IS - 0008-8749 (Linking) VI - 258 IP - 1 DP - 2009 TI - Human monocytes but not dendritic cells are killed by blocking of autocrine cyclooxygenase activity. PG - 107-14 LID - 10.1016/j.cellimm.2009.03.019 [doi] AB - Dendritic cells (DCs), in peripheral tissues, derive mostly from blood precursors that differentiate into DCs under the influence of the local microenvironment. Monocytes constitute the main known DC precursors in blood and their infiltration into tissues is up-regulated during inflammation. During this process, the local production of mediators, like prostaglandins (PGs), influence significantly DC differentiation and function. In the present paper we show that treatment of blood adherent mononuclear cells with 10microM indomethacin, a dose achieved in human therapeutic settings, causes monocytes' progressive death but does not affect DCs viability or cell surface phenotype. This resistance of DCs was observed both for cells differentiated in vitro from blood monocytes and for a population with DCs characteristics already present in blood. This phenomenon could affect the local balance of antigen-presenting cells, influence the induction and pattern of immune responses developed under the treatment with non-steroidal anti-inflammatory drugs and, therefore, deserves further investigation. FAU - Oliveira, Bruno L AU - Oliveira BL AD - Laboratory of Tumor Immunology, Department of Immunology, University of Sao Paulo, Sao Paulo, Brazil. FAU - Cavalcanti, Clara M AU - Cavalcanti CM FAU - Azevedo, Ana Paula S AU - Azevedo AP FAU - Tomiyoshi, Marcio Y AU - Tomiyoshi MY FAU - Bergami-Santos, Patricia C AU - Bergami-Santos PC FAU - Barbuto, Jose Alexandre M AU - Barbuto JA LA - eng PT - Journal Article PT - Research Support, Non-U.S. Gov't DEP - 20090425 PL - Netherlands TA - Cell Immunol JT - Cellular immunology JID - 1246405 RN - 0 (Anti-Inflammatory Agents, Non-Steroidal) RN - 0 (Cyclooxygenase Inhibitors) RN - 0 (Tumor Necrosis Factor-alpha) RN - EC 1.14.99.1 (Prostaglandin-Endoperoxide Synthases) RN - XXE1CET956 (Indomethacin) SB - IM MH - Anti-Inflammatory Agents, Non-Steroidal/*pharmacology MH - Cell Death MH - Cell Differentiation/drug effects MH - Cell Survival/drug effects MH - Cyclooxygenase Inhibitors/*pharmacology MH - Dendritic Cells/*drug effects/enzymology/immunology MH - Humans MH - Indomethacin/*pharmacology MH - Monocytes/*drug effects/enzymology/immunology MH - Prostaglandin-Endoperoxide Synthases/*drug effects MH - Tumor Necrosis Factor-alpha/immunology/metabolism EDAT- 2009/04/28 09:00 MHDA- 2009/06/13 09:00 CRDT- 2009/04/28 09:00 PHST- 2008/08/06 00:00 [received] PHST- 2009/03/26 00:00 [revised] PHST- 2009/03/30 00:00 [accepted] PHST- 2009/04/28 09:00 [entrez] PHST- 2009/04/28 09:00 [pubmed] PHST- 2009/06/13 09:00 [medline] AID - S0008-8749(09)00059-8 [pii] AID - 10.1016/j.cellimm.2009.03.019 [doi] PST - ppublish SO - Cell Immunol. 2009;258(1):107-14. doi: 10.1016/j.cellimm.2009.03.019. Epub 2009 Apr 25.