RNA结合蛋白 hnRNPU 调节了多发性骨髓瘤对 selinexor 的抵抗力
1Department of Hematology, West China Hospital, Sichuan University, China.
Cancer letters
|November 20, 2023
概括
异质核核核糖核蛋白U (hnRNPU) 调节对 selinexor 的敏感性,这是一种多发性骨髓瘤 (MM) 治疗. 较低的hnRNPU表达增强了来自selinexor的MM细胞死亡,这表明它是一种预测性生物标志物.
科学领域:
- 在瘤学瘤学.
- 分子生物学分子生物学
- 血液学 血液学 血液学
背景情况:
- 多发性骨髓瘤 (MM) 是一种无法治愈的血液癌症.
- 作为一种新型选择性核出口抑制剂 (SINE) 的Selinexor已被批准用于MM治疗.
- 在MM中抗 selinexor 的机制在很大程度上仍未被探索.
研究的目的:
- 调查异质核核核糖核蛋白U (hnRNPU) 在MM对selinexor敏感性的作用.
- 确定潜在的生物标志物来预测MM患者对塞利尼克索治疗的反应.
主要方法:
- 在MM细胞中 hnRNPU淘汰 (hnR-KD) 和与对照淘汰 (CTR-KD) 细胞进行比较.
- 使用细胞亡试验,评估selinexor诱导的亡.
- 蛋白质组学阵列用于检查 hnRNPU 淘汰后的核蛋白质保留.
- 糖分梯度测试,RNA电泳移动转移测试和RNA拉下测试,以评估mRNA翻译调节.
主要成果:
- hnR-KD MM细胞在体外和体内表现出对 selinexor 诱导的细胞死亡的敏感性增加.
- 响应塞利尼克索的MM患者表现出较低的hNRNPU表达水平.
- hnRNPU通过影响LTV1和NMD3定位和MDM2和RANmRNA转换来调节MM敏感性,影响XPO1介导的核出口.
结论:
- hnRNPU在调节MM对塞利尼克索的敏感性方面发挥着至关重要的作用.
- hnRNPU可以作为一个预测生物标志物来分类MM患者有资格接受塞利尼克索治疗.
- 向hnnRNPU可能是一个潜在的治疗策略,以克服MM中的selinexor耐药性.
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