In contrast to gld mice, the FasL mutant knock in mice around the C57BL/6 background build haemopoietic tumours and reticular cell sarcomas, suggesting that even though Molecular definition of cancer distinct antigens recognized by T cells opened an strategy to build cancer distinct immunotherapy.
We intended to integrate immunobiological technique of T cells with two technologies, nanogel technology and retroviral vector technology for translational Docetaxel research of cancer immunotherapy. Cholesterol bearing hydrophobizedpullulan, physically cross linked nanogels by self assembly, form nanoparticle complex with protein in water. We found that antigen protein with multiple T cell epitopes, when complexed with CHP, was efficiently transported to lymph nodes and well captured by antigen presenting cells such as dendritic cells and macrophages leading to cross presentation. Hence, CHP antigen protein complex may become excellent cancer vaccine to induce both CD8 killer T cells and CD4 helper T cells of high quality. Intrinsic weakness of insufficiency in number of cancer specific T cells in hosts, prompted us to develop adoptive T cell therapy withlymphocytes engineered to possess cancer specificity.
SKG mouse is a murine model of autoimmune arthritis. A spontaneous point mutation of the gene encoding an SH2 domain of the ? associated protein of 70 kDa gene, a key signal transduction molecule in T cells, causes chronic autoimmune arthritis in SKG mice that resembles human RA in many aspects. Altered signal transduction from T cell antigen receptor through the aberrant NSCLC ZAP 70 changes the thresholds of T cells to thymic selection, leading to the positive selection of otherwise negatively selected autoimmune T cells. Based on the finding that the skg mutation of ZAP 70 causes autoimmune arthritis, we then examined how attenuated TCR signaling affects the spectrum of autoimmune diseases. In a set of mice with the mutation, the amount of ZAP 70 protein as well as its tyrosine phosphorylation upon TCR stimulation decreased from /, skg/, skg/skg, to skg/ mice in a stepwise manner.
In correlation with this change, gastritis mediating TCR Docetaxel transgenic T cells were positively selected in /, less in skg/, but not in skg/skg BALB/c mice. Similarly, on the genetic background of diabetes prone NOD mice, diabetes spontaneously developed in /, at a lesser incidence in skg/, but not in skg/skg mice, which instead succumbed to arthritis. Thus, the graded attenuation of TCR signaling alters the repertoire and the function of autoimmune T cells and natural Tregs in a progressive manner. It also changes the dependency of disease development on environmental stimuli. These findings collectively provide a model of how genetic anomaly of T cell signaling contributes to the development of autoimmune disease. Haemophilic arthropathy, which shares some clinical and biological injury characteristics with rheumatoid arthritis, is characterized by chronic proliferative synovitis and cartilage destruction.
To measure cell proliferation/citotoxicity, the WST 1 assay has been performed. Caspase 3 activity has been evaluated with ELISA kit and western blot.
Anti Fas mAb has a dose dependent citotoxic effect on HA synoviocytes, even when associated with TNFalpha and FGF. Anti Fas mAb is effective in increasing caspase 3 levels in HA synoviocytes in a dose dependent manner. HA synoviocytes show E7080 higher levels of activated caspase 3 compared to RA synoviocytes.
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