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首页> 外文期刊>Anticancer Research: International Journal of Cancer Research and Treatment >Class II Transactivator Expression in Melanoma Cells Facilitates T-cell Engulfment
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Class II Transactivator Expression in Melanoma Cells Facilitates T-cell Engulfment

机译:黑色素瘤细胞中的II类反式激活因子表达促进T细胞吞噬

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Background/Aim: Melanoma cells express high levels of HLA class II, cell surface antigen-presenting proteins, which is an anomalous phenotype among solid tumors. There has never been a satisfying explanation for how this HLA class II-positive phenotype is related to tumor development. Lugini and colleagues demonstrated that melanoma cells have the capacity to engulf T-cells. We considered the possibility that this capacity could be dependent on HLA class II expression. Materials and Methods: We co-cultured melanoma and CD4-positive, labeled, Jurkat-C T-cells. The melanoma cells were transformed with an expression vector for CIITA, the obligate HLA class II gene transactivator. We then assayed for the transfer of label to the melanoma cells. Results: CHTA expression facilitated engulfment of the T-cell material but not material from B-cells. Conclusion: The results suggest a possible mechanism for HLA class II-positive melanoma cells in blunting an anti-tumor response and suggest a possible target for melanoma therapy.
机译:背景/目的:黑色素瘤细胞表达高水平的HLA II类细胞表面抗原呈递蛋白,这是实体瘤中的异常表型。关于这种HLA II类阳性表型与肿瘤发展之间的关系,从来没有令人满意的解释。 Lugini及其同事证明了黑色素瘤细胞具有吞噬T细胞的能力。我们考虑了这种能力可能取决于HLA II类表达的可能性。材料和方法:我们共培养了黑色素瘤和CD4阳性的标记Jurkat-C T细胞。用CIITA(专用的HLA II类基因反式激活因子)的表达载体转化黑素瘤细胞。然后,我们分析了标记物向黑素瘤细胞的转移。结果:CHTA表达促进了T细胞物质的吞噬,但不促进B细胞物质的吞噬。结论:结果提示HLA II类阳性黑色素瘤细胞减弱抗肿瘤反应的可能机制,并为黑色素瘤治疗提供了可能的靶标。

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