@article{oai:nagasaki-u.repo.nii.ac.jp:00016830,
 author = {Fukushima, Naomi and Nakamura, Tatsufumi and Nishiura, Yoshihiro and Ida, Hiroaki and Aramaki, Toshiyuki and Eguchi, Katsumi},
 issue = {2},
 journal = {Intervirology},
 month = {Jul},
 note = {OBJECTIVE: Activity of integrin/ligand signaling leading to activation of small GTPases might regulate the efficiency of cell-to-cell spread of human T lymphotropic virus type I (HTLV-I) through the virological synapse. We compared both activity of small GTPases and involvement of integrin/ligand signaling in extracellular release of HTLV-I virions between each three HTLV-I-infected T cell lines derived from HTLV-I-associated myelopathy/tropical spastic paraparesis (HAM/TSP) patients and from other origins as a control. METHODS: Activity of small GTPases (Rho, Rac and Cdc42) was analyzed by pull-down assay with suppressive effect of both HTLV-I production and HTLV-I tax mRNA expression by anti-integrin-blocking antibodies. RESULTS: All small GTPases were strongly activated in all cell lines derived from HAM/TSP patients, but not in control cell lines except one cell line. Treatment of all cell lines derived from HAM/TSP patients, but not all control cell lines, with anti-integrin-blocking antibodies significantly suppressed the level of HTLV-I p19 antigen in culture supernatants without downregulation of HTLV-I tax mRNA expression. CONCLUSION: Significant involvement with integrin/ligand signaling in extracellular release of HTLV-I virions in cell lines derived from HAM/TSP patients suggests that HTLV-I-infected cells in HAM/TSP patients have the potential for the efficient spread of HTLV-I to uninfected cells., Intervirology, 51(2), pp.123-129; 2008},
 pages = {123--129},
 title = {HTLV-I production based on activation of integrin/ligand signaling in HTLV-I-infected T cell lines derived from HAM/TSP patients.},
 volume = {51},
 year = {2008}
}