| Project/Area Number |
05670491
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| Research Category |
Grant-in-Aid for General Scientific Research (C)
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| Allocation Type | Single-year Grants |
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| Research Field |
Gastroenterology
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| Research Institution | Nara Medical university |
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Principal Investigator |
TSUJII Tadasu Nara Medical univ., Medicine, Professor, 医学部, 教授 (30075064)
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| Co-Investigator(Kenkyū-buntansha) |
YOSHIKAWA Masahide Nara Medical univ., Medicine, Research Associate, 医学部, 助手 (50230701)
ISHIZAKA Shigeaki Nara Medical univ., Medicine, Associate Professor, 医学部, 助教授 (90159715)
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| Project Period (FY) |
1993 – 1994
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| Project Status |
Completed (Fiscal Year 1994)
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| Budget Amount *help |
¥2,600,000 (Direct Cost: ¥2,600,000)
Fiscal Year 1994: ¥800,000 (Direct Cost: ¥800,000)
Fiscal Year 1993: ¥1,800,000 (Direct Cost: ¥1,800,000)
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| Keywords | Ursodeoxycholic acid / Immunomodulatory effect / ウルソヂオキシコール酸 / 免疫調節作用 / 抗原提示 |
|---|
| Research Abstract |
We investigated the effects of ursodeoxycholic acid (UDCA) on antigen presentation using a mouse T cell hybridoma line as helper T cells and a mouse B cell lymphoma line as antigen presenting cells, both of which possessed defined antigen specificities. UDCA suppressed IL-2 production and cytotoxic activity of T cells. UDCA,however, did not reduce the spontaneous expression of either MHC class II molecules or antigen specific IgM on the surface of B cells. The capping and internalization of surface IgM during antigen exposure were not affected by UDCA.Furthermore, antigen-pulsed B cells in the presence of UDCA retained the ability of stimulating T cells. These results suggest that UDCA does not impair the function of antigen presenting cells and that UDCA may interfere with the recognition of processed antigen by T cells in antigen presentation.
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