福克斯O是血统受限的冗余瘤抑制剂,并调节内皮细胞平衡
Ji-Hye Paik1, Ramya Kollipara, Gerald Chu
1Department of Medical Oncology, Dana-Farber Cancer Institute, Brigham and Women's Hospital, and Harvard Medical School, Boston, MA 02115, USA.
Cell
|January 27, 2007
概括
哺乳动物叉头盒O (FoxO) 转录因子是关键的瘤抑制剂. 删除所有FoxOs会促进癌症,强调它们在预防瘤疾病和维持血管平衡中的作用.
科学领域:
- 在瘤学瘤学.
- 分子生物学分子生物学
- 遗传学 是一个遗传学.
背景情况:
- 酸3-酶 (PI3K) -AKT信号传递是癌症发展的组成部分.
- 哺乳动物叉头盒O (FoxO) 转录因子 (FoxO1,FoxO3,FoxO4) 是PI3K-AKT信号的下游影响者.
- 在PI3K-AKT驱动的瘤表型中FoxOs的作用需要研究.
研究的目的:
- 对哺乳动物FoxO转录因子在癌症发展中的功能进行遗传分析.
- 为了确定FoxOs是否在PI3K-AKT通路激活的背景下作为瘤抑制剂.
- 确定参与内皮细胞功能和血管平衡的FOXO调节基因和途径.
主要方法:
- 在小鼠 (胚胎和体质) 中FoxO等位基因的遗传删除.
- 对受影响的内皮细胞进行转录组和促进体分析.
- 对已识别的FoxO目标进行功能研究,包括Sprouty2和PBX1.
主要成果:
- 删除多达五个FoxO等位基因导致了适度的瘤表型.
- 所有FoxOs的广泛体质删除导致了渐进的易患癌症的状态,包括胸腺淋巴瘤和血管瘤.
- 在体内对目标基因的FoxO调节是特定于环境的.
- 斯普劳蒂2和PBX1被验证为FoxO调节的内皮细胞形态发生和血管平衡的媒介.
结论:
- 哺乳动物的狐是真正的瘤抑制剂.
- FoxO转录因子在预防癌症发展方面发挥着至关重要的作用.
- 通过FoxO介导的调节对于维持血管平衡和内皮细胞功能至关重要.
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