Masanori Matsui

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Cytotoxic T lymphocytes (CTLs) play a critical role in the control of various cancers and infections, and therefore the molecular mechanisms of CTL generation are a critical issue in designing antitumor immunotherapy and vaccines which augment the development of functional and long-lasting memory CTLs. Interleukin (IL)-27, a member of the IL-6/IL-12(More)
IL-27 is a novel IL-6/IL-12 family cytokine that is considered to play a role in Th1 differentiation, whereas the exact role of IL-27 in Th1 differentiation and its molecular mechanism remain unclear. In this study we demonstrate a role for IL-27 in the early regulation of Th1 differentiation and its possible molecular mechanism. The ability of IL-27 to(More)
Initial studies suggested that major histocompatibility complex class I-restricted viral epitopes could be predicted by the presence of particular residues termed anchors. However, recent studies showed that nonanchor positions of the epitopes are also significant for class I binding and recognition by cytotoxic T lymphocytes (CTLs). We investigated if(More)
PURPOSE AND EXPERIMENTAL DESIGN We previously reported that glypican-3 (GPC3) was overexpressed, specifically in hepatocellular carcinoma (HCC) and melanoma in humans, and it was useful as a novel tumor marker. We also reported that the preimmunization of BALB/c mice with dendritic cells pulsed with the H-2K(d)-restricted mouse GPC3(298-306) (EYILSLEEL)(More)
OBJECTIVE To determine the mechanism of action of interleukin-27 (IL-27) against rheumatoid arthritis (RA). METHODS Adenovirus containing IL-27 transcript was constructed and was locally delivered into the ankles of mice with collagen-induced arthritis (CIA). Progression of arthritis was determined in treated and untreated mice by measuring ankle(More)
CD8+ cytotoxic T lymphocytes (CTLs) play a critical role in the immune control of Hepatitis C Virus (HCV) infection. In the current study, a number of HLA-A*0201-restricted CTL epitopes derived from HCV were evaluated by examining the peptide-binding affinity for major histocompatibility complex (MHC) class I molecules, the stability of peptide-MHC(More)
As a novel and safe vaccine strategy, the anthrax toxin-mediated antigen delivery system composed of lethal factor (LF) fusion protein and protective antigen (PA) has been studied to prime hepatitis C virus (HCV) core-specific cytotoxic T lymphocytes (CTLs) in vivo. The core epitope fused to LF (LF-core) together with PA induces a negligible core-specific(More)
Searching the sequence databases has revealed two novel cytokines: interleukin-23 (IL-23) and IL-27. These cytokines are quite similar to, but clearly distinct from IL-12 in their structures and T-cell stimulatory fashions. In contrast to IL-12, however, little is known about the roles of IL-23 and IL-27 in the immune regulation. Previously, we evaluated(More)
Previous studies have identified several residues lining the groove of the HLA-A2.1 molecule that are critical for Ag presentation. However, it is not clear whether these residues are critical for binding of the peptide epitope per se or for determining the appropriate conformation of bound peptide. To distinguish between these possibilities, mutations at(More)
To evaluate the contribution of the major histocompatibility complex class I pockets to the binding of self-peptides recognized by alloreactive cytotoxic T-lymphocyte (CTL) clones, we have constructed an extensive library of HLA-A2 mutants with different amino acid substitutions in each of the six pockets. When these mutants were tested in cytotoxicity(More)