نتایج جستجو برای: cytotoxic t lymphocyte
تعداد نتایج: 767503 فیلتر نتایج به سال:
BACKGROUNDS: Seminoma is frequently observed in human and canine testes especially in cryptorchids. Canine and human seminomas are typically associated with leukocytic infiltration. OBJECTIVES: We aimed to identify the type of lymphocytes that infiltrate to seminomas. METHODS: Tumor infiltrating lymphocytes were evaluated by immunohistological techniques in 5 dogs with diffuse seminoma. Routine...
Chronic T cell responses, as they occur in rheumatoid arthritis, are complex and are likely to involve many mechanisms. There is a growing body of evidence that, in concert with the T cell antigen receptor signal, CD28 and cytotoxic T-lymphocyte antigen-4 (CTLA-4; CD152) are the primary regulators of T cell responses. Whereas CD28 primarily activates T cell processes, CTLA-4 inhibits them. The ...
Most immunologists agree that CD8 T cells are important in controlling viruses, at least after the first week of infection – the time it takes for naive CD8 T cells to expand and differentiate into antiviral cytotoxic T lymphocytes (CTL). Nonetheless, CD8 T-cell measurements in HIV clinical studies show little relation to disease prognosis. There are two possible interpretations – either CD8 T ...
Secondary murine cytotoxic T lymphocyte responses from alloantigen-primed T cells can be induced in vitro by apparently unrelated regimens, such as addition of either concanavalin A (Con A), conditioned medium from Con A stimulated lymphocyte cultures, conditioned medium from secondary mixed lymphocyte cultures (MLC), or stimulator cells sharing only the I-region with the stimulating cells used...
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