在结直肠癌中,PERK功能的丧失通过降低SLC7A11 (Xc−系统) 的下调促进铁亡
Krishan Kumar Saini1, Priyank Chaturvedi2, Abhipsa Sinha2
1Division of Cancer Biology, CSIR-Central Drug Research Institute (CDRI), Lucknow, 226031, India; Academy of Scientific and Innovative Research, Ghaziabad, Uttar Pradesh, 201002, India.
Redox biology
|August 3, 2023
概括
展开的蛋白质响应 (UPR) 途径,特别是PERK,在耐治疗结直肠癌中调节铁化. 抑制PERK使癌细胞对铁亡敏感,提供了一个新的治疗策略.
科学领域:
- 细胞生物学 细胞生物学
- 癌症研究 癌症研究
- 生物化学 生化学
背景情况:
- 铁,一种依赖于铁的细胞死亡,是治疗耐药瘤的弱点.
- 细胞内膜网膜 (ER) 的压力和未折叠的蛋白质反应 (UPR) 有助于抗癌治疗.
- 调节UPR以诱导铁亡是一种潜在的治疗途径.
研究的目的:
- 调查ER压力和UPR在铁亡中的作用.
- 为了确定是否准UPR可以使癌细胞对铁亡敏感.
- 探索PERK在结直肠癌中的铁灭调节中的特定贡献.
主要方法:
- 用铁灭诱导剂RSL3进行治疗,以观察UPR激活和SLC7A11表达.
- 抑制PERK通路,以评估其对SLC7A11和铁亡的作用.
- 在小鼠体内瘤生长研究.
- TCGA数据挖掘和分析患者样本.
主要成果:
- 在RSL3诱导的UPR (PERK,ATF6,IRE1α) 和SLC7A11过度表达.
- 通过减少ATF4的招募到其促进体,PERK抑制降低了SLC7A11的调控.
- 失去PERK功能增加了脂质过氧化和有限的瘤生长 in vivo,显示铁亡.
- 在结直肠癌患者中,PERK和SLC7A11的表达是正相关的.
结论:
- 在结直肠癌中,PERK作为铁亡的负调节剂.
- 失去PERK功能使结直肠癌细胞对ferroptosis产生敏感性.
- 小分子PERK抑制剂代表了对抗亡耐药癌症的有希望的治疗方法.
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