Regulatory T-Cell–Mediated Attenuation of T-Cell Responses to the NY-ESO-1 ISCOMATRIX Vaccine in Patients with Advanced Malignant Melanoma
نویسندگان
چکیده
منابع مشابه
NY-ESO-1 DNA vaccine induces T-cell responses that are suppressed by regulatory T cells.
PURPOSE Different vaccination strategies against the NY-ESO-1 antigen have been employed in an attempt to induce antitumor immune responses. Antigen-specific effector T-cell responses have been reported in a subset of vaccinated patients; however, these responses have not consistently correlated with disease regression. Here, we report for the first time clinical and immune responses generated ...
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Cancer vaccines are designed to expand tumor antigen-specific T cells with effector function. However, they may also inadvertently expand regulatory T cells (Treg), which could seriously hamper clinical efficacy. To address this possibility, we developed a novel assay to detect antigen-specific Treg based on down-regulation of surface CD3 following TCR engagement, and used this approach to scre...
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Blockade of inhibitory signals mediated by cytotoxic T lymphocyte-associated antigen 4 (CTLA-4) has been shown to enhance T cell responses and induce durable clinical responses in patients with metastatic melanoma. The functional impact of anti-CTLA-4 therapy on human immune responses is still unclear. To explore this, we analyzed immune-related adverse events and immune responses in metastatic...
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PURPOSE To analyze the prognostic relevance and relative impact of circulating myeloid-derived suppressor cells (MDSC) and regulatory T cells (Treg) compared with functional tumor antigen-specific T cells in patients with melanoma with distant metastasis. EXPERIMENTAL DESIGN The percentage of CD14(+)CD11b(+)HLA-DR(-/low) MDSCs, CD4(+)CD25(+)FoxP3(+) Tregs, and the presence of NY-ESO-1- or Mel...
متن کاملMonitoring CD8 T cell responses to NY-ESO-1: correlation of humoral and cellular immune responses.
NY-ESO-1, a member of the cancer-testis family of antigens, is expressed in a subset of a broad range of different human tumor types. Patients with advanced NY-ESO-1-expressing tumors frequently develop humoral immunity to NY-ESO-1, and three HLA A2-restricted peptides were defined previously as targets for cytotoxic CD8(+) T cells in a melanoma patient with NY-ESO-1 antibody. The objectives of...
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ژورنال
عنوان ژورنال: Clinical Cancer Research
سال: 2009
ISSN: 1078-0432,1557-3265
DOI: 10.1158/1078-0432.ccr-08-2484