1991 Fiscal Year Final Research Report Summary
Significance of adhesion molecules in differentiation and activation of thymocytes.
| Project/Area Number |
01480167
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| Research Category |
Grant-in-Aid for General Scientific Research (B)
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| Allocation Type | Single-year Grants |
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| Research Field |
Experimental pathology
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| Research Institution | Sapporo Medical College |
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Principal Investigator |
MATSUURA Akihiro Sapporo Medical College Department of Pathology, Assistant Professor, 医学部, 講師 (70157238)
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| Co-Investigator(Kenkyū-buntansha) |
UEDA Toshimitsu Hokkaido University Institute for Immunology, Department of Pathogenesis Profess, 免疫研究所免疫病態部門, 教授 (00160185)
IWAKI Hiroyuki Sapporo Medical College Depertment of Pathology, Senior instructor, 医学部, 助手 (60203353)
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| Project Period (FY) |
1989 – 1991
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| Keywords | thymocytes / adhesion molecules / extracelluar matrix |
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| Research Abstract |
In the sequential steps in the T lymphocyte differentiation, the traffic of T cell progenitors through thymic tissue and contact with the thymic stromal cells have been considered to be most crucial, and stromal cells have been regarded as the most effective partner of this contact. Extracellular matrix, such as fibronectin (FN), are ubiquitously distributed within the body and considered to be involved in the first step of cell adhesion. For the lymphoid cells which do not have strong contacts with adjacent cells, the adhesion to thymic stromal cells or extracellular matrix must be very important for the initial differentiational process occurred in thymic microenvironments. To elucidate the function of adhesion molecules on T cell development and activation, we have generated monoclonal antibodies, 7D3 and 8H3, which respectively inhibit thymocyte adhesion either to thymic epithelial cells or fibronectin. Furthermore, 8H3 antibody stimulate thymocyte proliferation. Since both antigens were already expressed on immature thymocytes which do not yet express T cell receptor complex, such antigen-independent interactions may play crucial roles in early T cell development. Based on partial amino acids sequences of affinity-purified 8H3 polypeptides, putative cDNA clones encoding 8H3 molecules were isolated and further study to identify primary structure of the cDNA clones are in progress.
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[Publications] Kinebuchi,M.,Ide,T.,Lupin,D.,Tamatani,T.,Miyasaka,M.,Matsuura,A.Nagai,Y.,Kikuchi,K.,and Uede,T.: "A novel cell surface antigen involved in thymocyte and thymic epithelial cell adhesion." J.Immunol.146. 3721-3728 (1991)
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[Publications] Yamaki,T.,Uede,T.,Ibayashi,Y.,Kawahara,T.,Ishi,Y.,Kohda,H.,Shijubo,N.,Hashi,K.,and Kikuchi,K.,: "Cellu ar mechanisms of tumor rejection in rats.Natural Immunity and Cell Growth Regulation." Karger,Basel, 2 (1990)
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[Publications] Nomura, N., Uno, E., Tamura, Y., Suzuki, A., Kikuchi, K. and Uede, T.: "Vascular endothelial cells capable of binding lymphocytes express R2-1A6 antigen." Life Science Advances.
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[Publications] Kinebuchi, M., Ide, T., Lupin, D., Tamatani, T., Miyasaka, M., Matsuura, A., Nagai, Y., Kikuchi, K., and uede, T.: "A novel cell surface antigen involved in thymocyte and thymic epithelial cell adhesion." J. Immunol.146. 3721-3728 (1991)
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[Publications] Uehira, M., Uno, M., Kurner, T., Kikutani, H., Mori, K. Inomoto, T., Uede, T., Mlyazaki, J., Nishimoto, H. Kishimoto, T., and Yamamura, K.: "Development of autoimmune insulitis is prevented in E but not A NOD transgenic mice." International Immunology. 1. 209-213 (1989)
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[Publications] Kohda, H., Sekiya, C., Kanai, M., Yoshida, Y., Uede, T., Kikuchi, K., and Namiki, M.: "Flow cytometric and functional analysis of mononuclear cells infiltrating into the liver in experimental autoimmune hepatitis." Clin. Exp. Immunol. 82. 473-478 (1990)
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[Publications] Minamoto, S., Mori, H., Hatakeyama, M., Kono, T., Doi, T., Ide, T., Uede, T., and taniguchi, T.: "Characterization of the heterodimeric complex of human 1L-2 receptor alpha-beta chains reconstituted in a mouse fibloblastic cell line, L929." J. Immunol.145. 2177-2182 (1990)
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