摘要
目的:肿瘤细胞常发生糖基化异常。T-合成酶(核心1 β 1,3-半乳糖基转移酶,C1GALT1,或T-合成酶)是参与O-糖基化的关键酶。尽管已知T-合酶在人类肿瘤中很重要,但T-合酶和T抗原对人类肿瘤反应的影响仍不明确。 方法:在本研究中,T-合成酶特异性短发夹RNA (shRNA)或T-合成酶特异性真核表达载体(pcDNA3.1(+))转染小鼠骨肉瘤LM8细胞,以评估T-合成酶对T细胞和细胞因子的影响。 结果:T-synthase的上调在体外促进了骨肉瘤细胞的增殖,但在体内,T-synthase的上调在植入后2-3周内最初促进了肿瘤的增殖,但在植入后3周后表现出明显的生长抑制作用。体外高表达T-合成酶的骨肉瘤细胞促进CD8+ T细胞增殖,抑制细胞凋亡。此外,T合酶的上调促进CD8+ T细胞的增殖和CD4+ T细胞衍生的IFN-γ细胞因子的增加,从而诱导CTLs的肿瘤致死率增加。 结论:我们的数据表明,高T合酶表达通过提高机体的抗肿瘤免疫来抑制肿瘤生长。因此,利用这一特性制备具有高免疫原性的肿瘤细胞疫苗,为骨肉瘤的临床免疫治疗提供了新的思路。
关键词: 核心1 β 1 3-半乳糖转移酶或T合成酶,T抗原,骨肉瘤,CD8+ T细胞,免疫调节,IFN-γ细胞因子。
Animated Abstract
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