通过细胞条形码对达布拉费尼布诱导的药物不敏感性和对二线治疗药物的附带敏感性的表征
Rana Can Baygin1, Kubra Celikbas Yilmaz1, Ahmet Acar2
1Department of Biological Sciences, Middle East Technical University, Universiteler Mah. Dumlupınar Bulvarı 1, Çankaya, 06800, Ankara, Turkey.
Scientific reports
|January 3, 2024
概括
药物不敏感是癌症治疗中的一个主要障碍. 这项研究揭示了细胞条形码如何跟踪对达布拉费尼布不敏感的结直肠癌细胞的克隆进化,识别了氧沙丁和capecitabine作为潜在的二线治疗方法.
科学领域:
- 在瘤学瘤学.
- 进化生物学 进化生物学
- 基因组学就是基因组学.
背景情况:
- 药物不敏感性在癌症治疗中构成了重大挑战,限制了治疗疗效.
- 发生BRAF V600E突变的结直肠癌 (CRC) 往往会对达布拉芬尼布等向疗法产生不敏感.
- 了解导致药物不敏感的克隆动态对于开发有效的二线治疗至关重要.
研究的目的:
- 调查BRAF V600E突变HT-29细胞中达布拉费尼布诱导的药物不敏感性背后的克隆进化.
- 为了确定潜在的二线治疗方法,可以使得dabrafenib不敏感的癌症群体更敏感.
- 阐明与达布拉费尼布不敏感性相关的克隆性变化的时间动态.
主要方法:
- 利用细胞条码技术追踪在达布拉费尼布治疗下HT-29细胞中的克隆扩张和进化.
- 在已耗尽的介质中使用无细胞DNA的纵向监测来评估克隆动态.
- 进行全外因子测序以识别体质拷贝数变异 (CNV) 和单核酸变异 (SNV).
- 进行了附带药物敏感性测试,以评估潜在的二线治疗剂.
主要成果:
- 细胞条形码显示了既有条形码的频率增加,也增加了新的条形码的频率,这表明克隆的选择和扩张是对达布拉费尼布不敏感的反应.
- 对无细胞DNA的纵向监测为这些克隆群体的时间动态提供了洞察力.
- 整体外因子测序发现了潜在的基因变异 (CNV和SNV),有助于达布拉芬尼不敏感.
- 单独或组合使用的牛利和capecitabine在诱导对dabrafenib不敏感的HT-29细胞的附带敏感性方面表现出有效性.
结论:
- 这项研究阐明了导致BRAF V600E突变HT-29结直肠癌细胞中达布拉芬尼不敏感的克隆动态.
- 奥克萨利普拉丁和卡佩奇他作为有效的二线疗法,有望提高对达布拉芬尼不敏感癌症的敏感性.
- 这项研究为开发针对耐药癌症的进化信息治疗策略提供了基础.
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