在结直肠癌转移期间的渐进性可塑性
bioRxiv : the preprint server for biology
|September 4, 2023
概括
转移性结肠直肠癌细胞失去肠道状态并获得可塑性,分化为胎儿原始细胞和分化的细胞类型. 这种重编程,由化疗恶化,与较差的患者存活率有关.
科学领域:
- 在瘤学瘤学.
- 癌症生物学 癌症生物学
- 细胞重编程 细胞重编程
背景情况:
- 转移是癌症死亡的主要原因,但转移性细胞状态及其起源仍然不明.
- 大肠直肠癌 (CRC) 的进展涉及从原发性瘤向转移性瘤的过渡,但潜在的细胞机制尚不清楚.
研究的目的:
- 为了研究原发性和转移性结直肠癌的细胞状态.
- 了解转移性癌细胞的可塑性和分化潜力.
- 确定驱动转移性细胞状态过渡的分子机制.
主要方法:
- 来自患者的生物样本三组 (正常结肠,初级CRC,转移性CRC) 的分析.
- 利用匹配的患者衍生器官来研究细胞分化.
- 研究了PROX1在调节细胞系稳定性的作用.
主要成果:
- 初级CRC瘤主要表现出LGR5+肠茎状状态.
- 转移表现出显著的细胞可塑性,失去肠道状态并采用胎儿前状态.
- 转移性细胞经历非正规的分化成状和神经内分泌类型的状态,化学疗法加剧并与生存率低下有关.
- 转移性细胞比原发性瘤细胞具有更大的多系分化潜力.
- 确定PROX1的下调是使非正规重编程成为可能的关键事件.
结论:
- 转移性结直肠癌细胞经历了塑性重编程过程,涉及脱差和异化的分化.
- 化疗可以加剧这种重编程,对患者的治疗结果产生负面影响.
- PROX1在维持肠道血统身份方面发挥着至关重要的作用,其损失促进了转移性可塑性.
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