PMID- 16368150 OWN - NLM STAT- MEDLINE DCOM- 20080314 LR - 20131121 IS - 0165-2478 (Print) IS - 0165-2478 (Linking) VI - 103 IP - 2 DP - 2006 Mar 15 TI - Interleukin-18 induces the production of vascular endothelial growth factor (VEGF) in rheumatoid arthritis synovial fibroblasts via AP-1-dependent pathways. PG - 159-66 AB - Interleukin-18 (IL-18) is a novel pro-inflammatory cytokine which has been implicated to play a pathogenic role in rheumatoid arthritis (RA). Vascular endothelial growth factor (VEGF) plays an important role in angiogenesis in rheumatoid synoviocytes. In present study, we examined the effect of IL-18 on VEGF production in fibroblast-like synoviocytes (FLS) isolated from the patients with RA. FLS were prepared from the synovial tissues of patients with RA and osteoarthritis (OA) and cultured in the presence of IL-18. The production of VEGF from FLS was measured in culture supernatants by enzyme-linked immunosorbent assay (ELISA). The VEGF messenger RNA (mRNA) expression and AP-1 binding activity of VEGF transcript were determined by reverse transcription-polymerase chain reaction (RT-PCR) and electrophoretic mobility shift assay (EMSA). IL-18 and VEGF levels of sera and synovial fluids (SF) of RA patients (n=30) were significantly higher than those of OA patients (n=20). IL-18 dose-dependently increased the production of VEGF. The effect of IL-18 on VEGF production appeared to be as potent as IL-1beta, whereas tumor necrosis factor (TNF)-alpha and interferon (IFN)-gamma showed little effects on VEGF production. AP-1-specific inhibitor Curcumin dose-dependently abrogated the effect of IL-18 on VEGF production. The VEGF enhancement of IL-18 was associated with increased AP-1 binding activity to the VEGF promoter site. These findings suggest IL-18 as an angiogenic factor in RA and down-regulation of IL-18 activity or AP-1 signal pathway can be potential therapeutic targets for RA. FAU - Cho, Mi-La AU - Cho ML AD - Department of Medicine, The Center for Rheumatic Diseases, The Rheumatism Research Center (RhRC), Catholic Research Institutes of Medical Sciences, Catholic University of Korea, Seoul 137-701, Republic of Korea. iammila@catholic.ac.kr FAU - Jung, Young Ok AU - Jung YO FAU - Moon, Young-Mi AU - Moon YM FAU - Min, So-Youn AU - Min SY FAU - Yoon, Chong-Hyeon AU - Yoon CH FAU - Lee, Sang-Heon AU - Lee SH FAU - Park, Sung-Hwan AU - Park SH FAU - Cho, Chul-Soo AU - Cho CS FAU - Jue, Dae-Myung AU - Jue DM FAU - Kim, Ho-Youn AU - Kim HY LA - eng PT - Journal Article PT - Research Support, Non-U.S. Gov't DEP - 20051116 PL - Netherlands TA - Immunol Lett JT - Immunology letters JID - 7910006 RN - 0 (Interleukin-18) RN - 0 (RNA, Messenger) RN - 0 (Transcription Factor AP-1) RN - 0 (Vascular Endothelial Growth Factor A) RN - 9007-49-2 (DNA) RN - IT942ZTH98 (Curcumin) SB - IM MH - Adult MH - Aged MH - Arthritis, Rheumatoid/*metabolism MH - Cells, Cultured MH - Curcumin/pharmacology MH - DNA/metabolism MH - Dose-Response Relationship, Drug MH - Female MH - Fibroblasts/*physiology MH - Humans MH - Interleukin-18/*physiology MH - Male MH - Middle Aged MH - Protein Binding MH - RNA, Messenger/metabolism MH - Synovial Fluid/metabolism MH - Synovial Membrane/*metabolism MH - Transcription Factor AP-1/antagonists & inhibitors/*physiology MH - Up-Regulation MH - Vascular Endothelial Growth Factor A/*biosynthesis/genetics EDAT- 2005/12/22 09:00 MHDA- 2008/03/15 09:00 CRDT- 2005/12/22 09:00 PHST- 2005/10/04 00:00 [received] PHST- 2005/10/27 00:00 [revised] PHST- 2005/10/27 00:00 [accepted] PHST- 2005/12/22 09:00 [pubmed] PHST- 2008/03/15 09:00 [medline] PHST- 2005/12/22 09:00 [entrez] AID - S0165-2478(05)00340-8 [pii] AID - 10.1016/j.imlet.2005.10.020 [doi] PST - ppublish SO - Immunol Lett. 2006 Mar 15;103(2):159-66. doi: 10.1016/j.imlet.2005.10.020. Epub 2005 Nov 16.