受损的血脑屏障交叉点增强黑色素瘤细胞间隙和扩散
Federico Saltarin1, Adrian Wegmüller1, Leire Bejarano2,3
1Theodor Kocher Institute, University of Bern, 3012 Bern, Switzerland.
Cancers
|October 28, 2023
概括
预防黑色素瘤大脑转移需要了解癌细胞如何穿越血脑屏障 (BBB). 这项研究表明,保持BBB完整性是限制黑色素瘤细胞扩散和随后的大脑转移的关键.
科学领域:
- 在瘤学瘤学.
- 神经科学是一个神经科学.
- 细胞生物学 细胞生物学
背景情况:
- 黑色素瘤经常转移到大脑,这构成了重大的临床挑战.
- 了解黑色素瘤细胞通过血脑屏障 (BBB) 的扩散对于预防大脑转移至关重要.
研究的目的:
- 在BBB中调查黑色素瘤细胞扩散的分子和细胞机制.
- 确定影响黑色素瘤细胞与BBB的相互作用和透的因素.
主要方法:
- 使用初级小鼠大脑微血管内皮细胞 (pMBMECs) 作为体外BBB模型.
- 损坏的黑色素瘤细胞与pMBMEC单层的相互作用.
- 雇佣了受刺激的IL-1β和PECAM-1-淘汰的pMBMEC来建模受损的BBB.BB.
- 在体内研究中使用了大脑定位黑色素瘤细胞系 (YUMM1.1-BrM4) 和缺乏PECAM-1的小鼠.
主要成果:
- 观察到黑色素瘤细胞在内皮单层中排他性的结节间隔.
- 证明黑色素瘤诱导的pMBMEC屏障破坏可以通过蛋白酶抑制来挽救.
- 在受损的BBB模型 (IL-1β受刺激或PECAM-1-knockout pMBMECs) 中显示了黑色素瘤细胞间隔的增加.
- 在屏障受损的PECAM-1缺乏的小鼠中,在BBB中确实增加了体内黑色素瘤细胞扩散.
结论:
- 保持血脑屏障的完整性是限制黑色素瘤大脑转移的关键措施.
- 黑色素瘤细胞扩散受BBB完整性和特定分子相互作用的影响.
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