PMID- 11298325 OWN - NLM STAT- MEDLINE DCOM- 20010510 LR - 20191104 IS - 0014-2980 (Print) IS - 0014-2980 (Linking) VI - 31 IP - 4 DP - 2001 Apr TI - Interleukin-18 enhances the production of interleukin-8 by eosinophils. PG - 1010-6 AB - Interleukin-18 (IL-18), a proinflammatory cytokine, leads to IFN-gamma production by NK or T cells, induces Th1 differentiation and suppresses IgE synthesis by B cells when acting on responding cells together with IL-12. IL-18 also exhibits biological activities related to allergic inflammation such as histamine or IL-4 release from basophils and accumulation of eosinophils in localized lesions in allergic model mice. In this study, Reverse transcription (RT)-PCR analysis revealed that IL-18 receptor alpha chain mRNA was expressed in both freshly prepared eosinophils and two eosinophilic cell lines (YY-1 and EoL-1 cells). Flow cytometry and RT-PCR analyses revealed that the treatment of YY-1 cells with n-butyric acid promoted cell maturation and caused an enhancement of IL-18 receptor alpha chain expression. IL-18 had little effect on the survival of peripheral eosinophils, but it dose-dependently augmented IL-8 synthesis by YY-1 cells. In addition, IL-18-mediated up-regulation of IL-8 expression in eosinophils from a patient suffering from hyper-eosinophilic syndrome was confirmed. Our findings using peripheral blood eosinophils and eosinophilic cell line suggest the functional importance of IL-18 in the induction of IL-8 and a potential proinflammatory role in allergy. FAU - Wang, W AU - Wang W AD - Department of Internal Medicine III, Osaka University Medical School, Osaka, Japan. FAU - Tanaka, T AU - Tanaka T FAU - Okamura, H AU - Okamura H FAU - Sugita, M AU - Sugita M FAU - Higa, S AU - Higa S FAU - Kishimoto, T AU - Kishimoto T FAU - Suemura, M AU - Suemura M LA - eng PT - Journal Article PT - Research Support, Non-U.S. Gov't PL - Germany TA - Eur J Immunol JT - European journal of immunology JID - 1273201 RN - 0 (IL18R1 protein, human) RN - 0 (Interleukin-18) RN - 0 (Interleukin-18 Receptor alpha Subunit) RN - 0 (Interleukin-8) RN - 0 (RNA, Messenger) RN - 0 (Receptors, Interleukin) RN - 0 (Receptors, Interleukin-18) RN - 107-92-6 (Butyric Acid) SB - IM MH - Butyric Acid/pharmacology MH - Cell Differentiation/drug effects MH - Cell Survival/drug effects MH - Cells, Cultured MH - Dose-Response Relationship, Drug MH - Enzyme-Linked Immunosorbent Assay MH - Eosinophils/*drug effects/*metabolism/pathology MH - Flow Cytometry MH - Gene Expression Regulation/drug effects MH - Humans MH - Hypereosinophilic Syndrome/metabolism/pathology MH - Interleukin-18/*pharmacology MH - Interleukin-18 Receptor alpha Subunit MH - Interleukin-8/*biosynthesis/genetics MH - RNA, Messenger/genetics/metabolism MH - Receptors, Interleukin/chemistry/genetics/metabolism MH - Receptors, Interleukin-18 MH - Reverse Transcriptase Polymerase Chain Reaction MH - Tumor Cells, Cultured EDAT- 2001/04/12 10:00 MHDA- 2001/05/22 10:01 CRDT- 2001/04/12 10:00 PHST- 2001/04/12 10:00 [pubmed] PHST- 2001/05/22 10:01 [medline] PHST- 2001/04/12 10:00 [entrez] AID - 10.1002/1521-4141(200104)31:4<1010::AID-IMMU1010>3.0.CO;2-8 [pii] AID - 10.1002/1521-4141(200104)31:4<1010::aid-immu1010>3.0.co;2-8 [doi] PST - ppublish SO - Eur J Immunol. 2001 Apr;31(4):1010-6. doi: 10.1002/1521-4141(200104)31:4<1010::aid-immu1010>3.0.co;2-8.