卵巢癌的转移模式通过追踪线粒体DNA突变的演变来确定
Zhiyang Xu1, Kaixiang Zhou2, Zhenni Wang2
1Department of Obstetrics and Gynecology, Xijing Hospital, Fourth Military Medical University, Xi'an, China.
Experimental & molecular medicine
|July 2, 2023
概括
线粒体DNA (mtDNA) 突变揭示了卵巢癌 (OC) 转移模式. 在初级与转移性组织中的不同mtDNA档案以及不同的突变异质性为治疗策略提供了信息,以获得更好的患者结果.
科学领域:
- 妇科瘤学 妇科瘤学
- 癌症基因组学 癌症基因组学
- 转移研究 转移研究
背景情况:
- 卵巢癌 (OC) 是一种高度致命的妇科恶性瘤,频繁转移,使治疗复杂化.
- 精确划分转移模式对于改善OC治疗策略至关重要.
- 线粒体DNA (mtDNA) 突变正在成为追踪瘤克隆性和演变的有价值标记.
研究的目的:
- 通过多区域采样和高深度mtDNA测序,阐明晚期卵巢癌的转移模式.
- 分析初级和转移性OC组织中的体质mtDNA突变,以了解瘤异质性和演变.
- 定义基于mtDNA的瘤进化得分 (MTEs),并评估其与转移模式和治疗反应的相关性.
主要方法:
- 从35名OC患者中抽取了195个原发性和200个转移性瘤组织的多区域采样.
- 实体线粒体DNA (mtDNA) 突变的高深度测序.
- 基于mtDNA突变的空间遗传学分析和克隆性指数计算.
- 基于mtDNA的瘤进化得分 (MTEs) 的定义和应用.
主要成果:
- 在mtDNA突变中观察到显著的样本级和患者级异质性.
- 截然不同的mtDNA突变模式区分了初级和转移性OC组织,共享和私有突变的频谱各不相同.
- 在16名双侧卵巢癌患者中,14名患者的单克隆瘤起源得到了支持.
- 空间遗传学分析确定了线性 (低异质) 和并行 (高异质) 的转移模式.
- 一个基于mtDNA的瘤进化得分 (MTEs) 与明显的转移模式和不同患者对手术和化疗的反应相关.
- 来自瘤的mtDNA突变在无液中比在血中更容易被检测出来.
结论:
- mtDNA突变为绘制卵巢癌转移的地图和理解瘤演变提供了强大的工具.
- 显而易见的转移模式,以不同的mtDNA突变异质性为特征,影响患者的预后和治疗疗效.
- MTEs得分为评估瘤的攻击性和预测OC的治疗反应提供了一个新的指标.
- 与血相比,酸液可能是检测循环瘤mtDNA的更敏感来源.
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