通过自身抑制 WNT 的转移性潜伏和免疫逃避
Srinivas Malladi1, Danilo G Macalinao2, Xin Jin1
1Cancer Biology and Genetics Program, Memorial Sloan Kettering Cancer Center, New York, NY 10065, USA.
Cell
|March 26, 2016
概括
潜伏转移是指癌细胞在最初的瘤被切除后多年生存. 这些被称为潜伏能力癌细胞 (LCC) 的细胞通过进入休眠状态而逃避免疫监测.
科学领域:
- 癌症学
- 癌症生物学
- 免疫学
背景情况:
- 主要瘤被移除后的几年内可能发生转移.
- 导致癌细胞长期休眠和随后生长的机制尚不清楚.
- 扩散的瘤细胞必须逃避免疫检测才能潜伏生存.
研究的目的:
- 识别和描述癌细胞在转移期间在潜伏状态下生存的机制.
- 确定在休眠转移细胞中维持瘤启动潜力的因素.
- 了解潜在的癌细胞是如何逃避免疫监测的.
主要方法:
- 从人类肺癌和乳腺癌细胞系中分离潜能癌细胞 (LCC).
- 对基因表达的分析,专注于转录因子和信号通路.
- 细胞循环状态和免疫逃避机制的评估,包括NK细胞相互作用.
主要成果:
- 细胞表现出类似干细胞的特性,并表达SOX2和SOX9转录因子.
- 通过LCC细胞的DKK1表达诱导缓慢循环状态并降低ULBP连接物,避免NK细胞的清除.
- 索克斯依赖的干状状态和WNT信号抑制使LCC细胞进入静止状态并逃避天生的免疫力.
结论:
- 具有潜伏能力的癌细胞利用类似干细胞的特征和免疫逃避策略来维持长期休眠.
- SOX2/SOX9表达和WNT通路的抑制对于保持潜伏转移状态至关重要.
- 了解这些机制为预防或治疗晚期转移性复发提供了潜在的治疗目标.
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