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在初始淋巴血管中的VE-cadherin结动力学促进淋巴结转移
Miguel Sáinz-Jaspeado1, Sarah Ring1, Steven T Proulx2,3
1Beijer and Science for Life Laboratories, Department Immunology, Genetics and Pathology, Rudbeck Laboratory, Uppsala University, Uppsala, Sweden.
Life science alliance
|December 26, 2023
概括
由VEGFA驱动的淋巴血管中的血管内皮 (VE) - cadherin结合拉链,促进癌症转移. 通过VEGFR2突变抑制VE-cadherin碎片化可以减少瘤扩散到淋巴结.
科学领域:
- 细胞生物学 细胞生物学
- 癌症研究 癌症研究
- 血管生物学 血管生物学
背景情况:
- 血管内皮质 (VE) - 阴素调节血液和淋巴血管中的内皮结动力学.
- 维格法信号传递在淋巴血管功能和转移中发挥作用.
研究的目的:
- 研究VEGFA信号如何调节淋巴结稳定性并促进对哨兵淋巴结的转移.
- 阐明VE-cadherin碎片化在VEGFA介导的淋巴转移中的作用.
主要方法:
- 在小鼠中注射VEGFA,以诱导皮肤初始淋巴管中的结节拉链.
- 在淋巴内皮中分析VE-cadherin碎片形状.
- 使用缺乏VEGFR2中的Y949酸盐的突变小鼠来评估Src酶激活.
- 挑战患有B16F10黑色素瘤和EO771乳腺癌的小鼠,以评估转移性传播.
主要成果:
- VEGFA注射诱导了皮肤初始淋巴体和瘤附近淋巴体的VE-cadherin结合拉链.
- 十字路口的拉链与小圆形VE-cadherin碎片的积累有关.
- 在缺乏VEGFR2中的Y949酸盐的突变小鼠中,淋巴结的拉链发生了,但VE-cadherin碎片化被抑制.
- 与野生型小鼠相比,瘤细胞进入淋巴血管和随后转移到淋巴结的发生在突变小鼠中减少了.
结论:
- 在最初的淋巴系统中,VEGFA 调解了 VE-cadherin 结合的拉链.
- 由VEGFA诱导的Src酶激活导致VE-cadherin分裂的增加,与瘤向哨兵淋巴结的扩散相关.
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