通过PIM3介导的酸化稳定了骨髓白血病因子2以促进骨髓肉瘤转移
Cuiling Zeng1, Xin Wang1, Jinkun Zhong1
1Sun Yat-sen University Cancer Center, State Key Laboratory of Oncology in South China, Guangdong Provincial Clinical Research Center for Cancer, Collaborative Innovation Center for Cancer Medicine, Guangzhou, China.
骨髓白血病因子2 (MLF2) 通过破坏BiP-IRE1α相互作用来驱动骨肉瘤肺转移. 针对PIM3/MLF2途径为骨髓瘤患者提供了潜在的治疗策略.
科学领域:
- 在瘤学瘤学.
- 分子生物学分子生物学
- 癌症转移 癌症转移
背景情况:
- 骨髓瘤是最常见的原发性骨癌.
- 肺转移是骨髓瘤的常见和严重并发症.
- 对于骨髓瘤,特别是转移性疾病,治疗目标有限.
研究的目的:
- 为了确定骨肉瘤肺转移的新型分子驱动因素.
- 阐明MLF2促进转移的机制.
- 探索 osteosarcoma 转移的潜在治疗点.
主要方法:
- 在骨髓瘤模型中进行体内CRISPR激活查.
- 相互作用组分析侧重于STUB1.1.
- 对 IRE1α/XBP1-S-MMP9 信号通路的研究.
- 分析蛋白质的修饰 (无化,化) 和降解.
主要成果:
- 骨髓性白血病因子2 (MLF2) 被确定为骨质肉瘤转移的促进者.
- MLF2 破坏了 BiP-IRE1α 相互作用,激活了 IRE1α/XBP1-S-MMP9 轴.
- STUB1针对MLF2进行降解,而PIM3介导的酸化通过USP21稳定MLF2.
- PIM3/MLF2轴是骨髓瘤肺转移的关键调节器.
结论:
- 通过IRE1α/XBP1-S-MMP9通路,MLF2在骨肉瘤肺转移中发挥着关键作用.
- PIM3,MLF2,STUB1和USP21之间的相互作用调节了MLF2的稳定性和功能.
- 抑制PIM3是肺转移性骨髓瘤的一个有前途的治疗策略.
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