在SCLC细胞系中对NRF2和NOTCH通路的KEAP1沉默的影响
Federico Pio Fabrizio1,2,3, Angelo Sparaneo1, Giusy Gorgoglione1
1Laboratory of Oncology, Fondazione IRCCS Casa Sollievo della Sofferenza, 71013 San Giovanni Rotondo, Italy.
在小细胞肺癌 (SCLC) 中功能障碍的KEAP1/NRF2信号促进瘤生长和化学抵抗. 对KEAP1的表观遗传沉默会破坏NRF2和NOTCH通路,影响癌细胞存活率和药物反应.
科学领域:
- 在瘤学瘤学.
- 分子生物学分子生物学
- 癌症研究 癌症研究
背景情况:
- KEAP1/NRF2通路调节了参与瘤细胞耐药性的基因.
- KEAP1/NRF2系统的功能障碍与患者的治疗结果和治疗反应相关.
- 在肺瘤中,NRF2/KEAP1与NOTCH等途径交叉交谈,影响生存和耐药性.
研究的目的:
- 在SCLC中研究NRF2/NOTCH交叉的遗传和表观遗传基础.
- 阐明KEAP1功能障碍在SCLC瘤发生中的作用.
- 评估KEAP1调节对SCLC对化疗和NOTCH抑制剂反应的影响.
主要方法:
- 在SCLC细胞系中研究基因和表观遗传KEAP1功能障碍.
- 评估了KEAP1调节对对埃托波,西斯和DAPT的反应的影响.
- 利用siRNA使KEAP1沉默,并分析了NRF2和NOTCH通路组件的下游影响.
主要成果:
- KEAP1/NRF2轴在SCLC细胞系中受到表观遗传控制.
- 通过siRNA上调NRF2沉默KEAP1,增加对西斯普拉丁和埃托的化学抗药性.
- KEAP1调制影响了NOTCH1,HES1和DLL3.3的转录.
结论:
- KEAP1功能障碍在表观遗传上影响了SCLC中的NRF2和NOTCH通路.
- KEAP1/NRF2和NOTCH通路的合作有助于SCLC瘤发生.
- 这些发现为针对KEAP1/NRF2和NOTCH信号的SCLC治疗策略提供了洞察力.
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