Journal
JAPANESE JOURNAL OF CANCER RESEARCH
Volume 92, Issue 4, Pages 377-382Publisher
BUSINESS CENTER ACADEMIC SOCIETIES JAPAN
DOI: 10.1111/j.1349-7006.2001.tb01105.x
Keywords
gp34; OX40 ligand (OX40L); OX40; T cell clones
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gp34, which we previously cloned, is a ligand of OX40 (CD134), a costimulatory molecule involved in T cell activation. To elucidate the role of human OX40/OX40L interaction, we examined the expression of gp34 (OX40L) and OX40 in normal human hematopoietic cells by using flow cytometry, OX40 expression is observed on activated T cells, while OX40L is expressed in antigen-presenting cells. However, cytotoxic T lymphocyte (CTL) clones specific for Epstein-Barr virus (EBV)transformed autologous lymphoblastic cell lines (LCLs) induced both OX40 and OX40L expression after antigen or T cell receptor (TCR) stimulation, This study suggests a possible function of OX40L/OX40, through T cell-T cell interaction, in the reactivation of memory T cells in an autocrine manner, with implications for the pathogenesis of viral infections and neoplasms.
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