类似于质母细胞的干细胞产生瘤内皮
Rong Wang1, Kalyani Chadalavada, Jennifer Wilshire
1Department of Neurosurgery, Memorial Sloan Kettering Cancer Center, New York, New York 10065, USA.
Nature
|November 25, 2010
概括
质母细胞癌干细胞可以分化为瘤细胞并形成新的血管. 这种可塑性解释了为什么在质母细胞瘤患者中,抗血管生成治疗有时会失败.
科学领域:
- 神经瘤学神经瘤学
- 癌症生物学 癌症生物学
- 干细胞研究 干细胞研究
背景情况:
- 质母细胞瘤 (GBM) 呈现出具有异常血管结构的侵袭性血管生成.
- 瘤内皮细胞的起源和GBM血管生成机制尚不清楚.
研究的目的:
- 为了调查瘤内皮细胞在质母细胞瘤中的起源.
- 探索质母细胞干细胞在形成瘤血管系统中的潜力.
主要方法:
- 对瘤细胞和内皮细胞的体质突变分析.
- 对CD133和CD144表达的流细胞计.
- 在体外和体外血统追踪研究.
- 定量 FISH 和比较的基因组杂交.
- 抑制VEGF,VEGFR2,玛分泌酶和NOTCH1通路的研究.
主要成果:
- 在GBM中的内皮细胞与瘤细胞共享体质突变.
- CD133 ((+) 干细胞含有CD144 ((+) 的原始细胞,能够进行内皮细胞分化.
- CD133 ((+) 细胞是多能细胞,分化成瘤和内皮细胞系.
- 在CD133 ((+) 细胞,它们的内皮衍生物和成熟的内皮中,基因组特征是相同的.
- 抑制VEGF/VEGFR2阻断了原体的成熟;抑制玛分泌酶/NOTCH1阻断了原体的分化.
结论:
- 质母细胞干细胞具有血统可塑性,产生瘤细胞和血管.
- 这种可塑性为GBM血管新生和抗血管新生治疗失败提供了洞察力.
- 在NOTCH途径中确定GBM治疗的潜在治疗标.
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