MYCN在肝脏瘤发生中的瘤功能和转录动态
Xian-Yang Qin1, Yali Xu1, Hricha Mishra1
1Laboratory for Cellular Function Conversion Technology, RIKEN Center for Integrative Medical Sciences, Yokohama, Kanagawa 230-0045, Japan.
概括
MYCN通过创造促进瘤的微环境来驱动肝癌. 在非瘤组织中使用MYCN的新评分可以预测肝细胞癌复发风险.
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:
- 肝细胞癌 (HCC) 是癌症死亡的主要原因,通常是晚期诊断的高复发率.
- 肝脏微环境压力和癌症发展之间的分子联系尚未完全理解.
- 一个原型瘤基因MYCN可能表明癌症干,但其在肝癌中的作用尚不清楚.
研究的目的:
- 为了研究MYCN在肝脏瘤发生中的致癌作用.
- 了解MYCN在肝癌发育过程中是如何被转录调节的.
- 确定MYCN在瘤微环境中的作用及其在人类HCC中的临床相关性.
主要方法:
- 在小鼠中使用了基于注射尾静脉的液态动力学转位子系统,用于MYCN过度表达.
- 进行了转录和时间解析的空间转录,以分析瘤的发展.
- 在人类HCC群体中开发并验证了基于机器学习的MYCN利基得分.
主要成果:
- 与AKT激活相结合的MYCN过度表达促进了小鼠的肝脏瘤发生.
- 由MYCN驱动的瘤显示了类似于人类HCC亚型的应激适应性转录程序.
- 在瘤进展过程中确定并扩展了一种 MYCN 丰富的利基,具有上皮-介质细胞过渡 (EMT) 和 Wnt/β-catenin 信号传输.
- MYCN 利基评分预测了复发风险,并确定了人类HCC中易患EMT的微环境,在非瘤组织中表现更好.
结论:
- 在肝癌中,MYCN充当促进瘤微环境的功能驱动器和空间标记物.
- MYCN利基评分通过分析非瘤肝脏组织转录组学来确定高风险HCC患者的临床可行的策略.
- 这种方法可能有助于检测容易发展新瘤的癌前.
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