| Project/Area Number |
17592097
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| Research Category |
Grant-in-Aid for Scientific Research (C)
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| Allocation Type | Single-year Grants |
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| Section | 一般 |
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| Research Field |
Surgical dentistry
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| Research Institution | Kyushu Dental College |
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Principal Investigator |
TOMINAGA Kazuhiro Kyushu Dental College, Dept. of Oral and Maxillofacial Surgery, Associate Professor (40188793)
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| Co-Investigator(Kenkyū-buntansha) |
NISHIBARA Tatsuji Kyushu Dental College, Dept of Health Promotion, Professor (80192251)
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| Project Period (FY) |
2005 – 2006
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| Project Status |
Completed (Fiscal Year 2006)
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| Budget Amount *help |
¥3,500,000 (Direct Cost: ¥3,500,000)
Fiscal Year 2006: ¥900,000 (Direct Cost: ¥900,000)
Fiscal Year 2005: ¥2,600,000 (Direct Cost: ¥2,600,000)
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| Keywords | temporomandibular disorder / ultrasonographic gene induction / interleukin-1 / IL-1 receptor antagonist / svnovial cells / microbubble / PGE2 / anti-inflammatory effect / アジュバント関節炎 / IL1-ra |
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| Research Abstract |
Administration of exogenous IL-1 receptor antagonist (IL-1ra) is effective in reducing the inflammatory reactions mediated by IL-1. In the present study, we transfected with a plasmid containing IL-1ra gene into synovial cells by the sonoporation method, and investigated the effect of IL-1ra gene transfection on inflammatory reactions induced by lipopolysaccharide (LPS) in vitro. IL-1ra- transfected synovial cells produced the extracellular IL-lra, and its level increased remarkably when the cells were cultured with LPS for 48 h. Interestingly, treatment of LPS enhanced the release of IL-1β in the culture supernatant of IL-1ra-transfected cells, however, a significant decrease of PGE2 release was observed when the cells were cultured with LPS for 60 h. These results indicate that IL-1ra could play a valuable regulatory role in inflammatory reactions of synovial cells, suggesting that the administration of IL-1ra gene with sonoporation is a useful method for the control of inflammation in arthritis.
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