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XXYLT1 抑制Jurkat细胞中的NOTCH1激活,同时促进细胞增殖
Weiwei Wang1,2, Wataru Saiki1,2, Yohei Tsukamoto1,2,3
1Department of Molecular and Cellular Biology, Nagoya University Graduate School of Medicine, Nagoya, Japan.
由XXYLT1进行的化对Jurkat细胞中的NOTCH1信号进行负面调节. 抑制XXYLT1增强了NOTCH1的激活,并破坏了细胞增殖,这表明T细胞白血病的新型治疗点.
科学领域:
- 生物化学和分子生物学
- 细胞信号传递 细胞信号传递
- 葡萄糖生物学 葡萄糖生物学
背景情况:
- 糖基化是一种关键的翻译后修改,影响蛋白质功能.
- 类似于表皮生长因子的重复会受到特定域的O-糖化处理.
- 在哺乳动物的Notch信号传递中,西洛西尔延长的作用在很大程度上是未知的.
研究的目的:
- 通过化α1-3化转移酶1 (XXYLT1) 进行终端化对NOTCH1信号传递的影响.
- 探索XXYLT1在Jurkat细胞中的功能,T细胞急性淋巴细胞白血病线与激活NOTCH1.1.
主要方法:
- 在过度表达的Jurkat细胞中分析NOTCH1片段的质谱学分析.
- 在Jurkat细胞中遗传删除XXYLT1.
- 评估NOTCH1激活,细胞表面表达和细胞增殖.
主要成果:
- NOTCH1 EGF10部位显示了O-葡萄糖的修饰,具有各种延长模式.
- 删除XXYLT1导致NOTCH1激活的增强,表明XXYLT1的抑制作用.
- XXYLT1淘汰赛影响了Jurkat细胞的增殖和下调MYC表达.
结论:
- 哺乳动物的Notch激活是通过在Jurkat细胞中的化微调.
- 在T细胞白血病中,XXYLT1抑制是Notch激动的潜在策略.
- 除了NOTCH1,XXYLT1还可能调节其他基质,影响细胞增殖.
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