首页> 外文期刊>Cellular immunology >DC-expressed MHC class I single-chain trimer-based vaccines prime cytotoxic T lymphocytes against exogenous but not endogenous antigens.
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DC-expressed MHC class I single-chain trimer-based vaccines prime cytotoxic T lymphocytes against exogenous but not endogenous antigens.

机译:DC表达的基于MHC I类单链三聚体的疫苗可引发针对外源而非内源性抗原的细胞毒性T淋巴细胞。

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摘要

The poor immunogenicity of many tumors can be partly explained by the inefficiency of the MHC class I peptide presentation pathway. MHC-I-based single-chain trimers (SCT) represent a new class of molecules with the potential to overcome this limitation. We here evaluated the ability of SCT presenting a melanoma antigen peptide (TRP-2) to prime cytotoxic T lymphocyte (CTL) responses in mice when given as DNA vaccines via Gene Gun or when expressed by dendritic cells. The SCT was unable to induce detectable priming or significant anti-tumor activity of CTL using either vaccination strategy, whereas control SCT (with an exogenous peptide) primed strong responses. This study thus provides the first data related to the use of SCT in combination with DC and their application toward self antigens and suggest this potent technology, alone, is insufficient to overcome self tolerance.
机译:MHC I类肽呈递途径的低效率可以部分解释许多肿瘤的免疫原性差。基于MHC-1的单链三聚体(SCT)代表了一种新型分子,有望克服这一局限性。当通过基因枪作为DNA疫苗或通过树突细胞表达时,我们在这里评估了SCT呈现黑素瘤抗原肽(TRP-2)引发小鼠细胞毒性T淋巴细胞(CTL)反应的能力。使用任何一种疫苗接种策略,SCT均无法诱导CTL的可检测启动或显着的抗肿瘤活性,而对照SCT(带有外源肽)则引发强反应。因此,这项研究提供了有关将SCT与DC结合使用及其对自身抗原的应用的第一个数据,并提示仅靠这种强大的技术不足以克服自我耐受性。

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