| Project/Area Number |
07557031
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| Research Category |
Grant-in-Aid for Scientific Research (A)
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| Allocation Type | Single-year Grants |
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| Section | 展開研究 |
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| Research Field |
Immunology
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| Research Institution | University of Tokyo (1996-1997)
Kanazawa University (1995) |
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Principal Investigator |
MATSUSHIMA Kouji University of Tokyo, Graduate School of Medicine, Development Preventive Medicine, Professor, 大学院・医学系研究科, 教授 (50222427)
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| Co-Investigator(Kenkyū-buntansha) |
YAMAZAKI Tatsumi Chugai Pharmaceutical Company, Chief Director, 所長(研究職)
向田 直史 金沢大学, がん研究所, 助教授 (30182067)
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| Project Period (FY) |
1995 – 1997
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| Project Status |
Completed (Fiscal Year 1997)
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| Budget Amount *help |
¥11,500,000 (Direct Cost: ¥11,500,000)
Fiscal Year 1997: ¥2,000,000 (Direct Cost: ¥2,000,000)
Fiscal Year 1996: ¥4,000,000 (Direct Cost: ¥4,000,000)
Fiscal Year 1995: ¥5,500,000 (Direct Cost: ¥5,500,000)
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| Keywords | interleukin-8 / anti-inflammatory agent / acute inflammation / anti-interleukin-8 antibody / humanization / NF-kB / IkB-bound kinase / phosphorylation / ケモカイン / 白血球 / 転写因子 / NFkB / IkBα / 単球走化活性化因子 / 抗体 |
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| Research Abstract |
IL-8 is essentially involved in neutrophil-dependent tissue damage in acute inflammatory reactions. We established the humanized mouse anti-human IL-8 by mean of complementarity determining region grafting and succeeded to purify the large amount of this antibody. For the application of this antibody on various clinical condition, we established various acute inflammatory ananimal models. Especially, we have established preclinical condition animal models such as acute respiratory distress syndrom-like lung injury and brain reperfusion injury. In these models, we showed that anti-IL-8 antibody treatment almostly prevented these injury. These results strongly suggest the possibility of clinical application of humarized anti-human IL-8 antibody against acute inflammatory dieases.
We have identified a kinase in cell extracts from the LPS-stimulated human monocytic cell line, THP-1, that specifically bind and phosphorylates IkBa. LPS-stimulation transiently enhanced the IkBa-bound kinase activity in THP-1 cells. Mutation analysis of IkBa and competition experiments with the synthetic peptides identified major phosphorylation site by the bound kinase as Ser and Thr residues in the C-terminal acidic domain of IkBa. Moreover, this IkBa-boundkinase is novel kinase but not Ikka, b which are related to signal pathway of TNF-a and IL-1. So that we try to purify the kinase SDS-PAGE analysis showed that the kinase. is 40 Kd. We are now analyzing the amino acid squence of the sample and trying to clone the gene.
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