PMEPA1与NEDD4L结合,通过非激活Wnt/β-catenin信号传递来抑制多发性骨髓瘤的恶性进展
Shanshan Hu1, Xinfang Gao1, Yan Zhu1
1Department of Hematology, Jinhua People's Hospital, Jinhua City, Zhejiang Province, 321000, China.
Cell biochemistry and biophysics
|March 4, 2025
概括
前列腺跨膜雄激素诱导蛋白1 (PMEPA1) 通过结合神经前体细胞表达的下调发育基因4L (NEDD4L) 来抑制Wnt/β-catenin信号传递,从而抑制多发性骨髓瘤 (MM) 的进展,从而提供潜在的治疗标.
科学领域:
- 血液学的恶性瘤
- 分子生物学分子生物学
- 癌症信号通路 癌症信号通路
背景情况:
- 多发性骨髓瘤 (MM) 是一种不治愈的血液性恶性瘤,患病率越来越高.
- 尽管它与患者存活率有关,但前列腺跨膜雄激素诱导蛋白1 (PMEPA1) 在MM病变发生过程中的作用尚未完全理解.
- 了解PMEPA1与神经前体细胞表达的下调发育基因4L (NEDD4L) 等其他蛋白质的相互作用,对于阐明它在MM中的功能至关重要.
研究的目的:
- 研究多发性骨髓瘤细胞中PMEPA1和NEDD4L的表达水平和功能作用.
- 阐明 PMEPA1 影响MM细胞增殖,细胞周期分布和细胞亡的分子机制.
- 确定PMEPA1和NEDD4L之间的相互作用及其对MM中的Wnt/β-catenin信号通路的影响.
主要方法:
- 在MM细胞中检查了PMEPA1和NEDD4L的表达.
- 使用PMEPA1过度表达和/或NEDD4L敲击的细胞培养 (RPMI-8226) 来评估增殖 (CCK-8,EDU染色),细胞循环和细胞亡 (流细胞计).
- 预测和验证的PMEPA1-NEDD4L结合 (BioGrid,HDOCK,共免疫沉降) 和分析的蛋白质水平 (免疫阻塞) 与增殖,亡和Wnt/β-catenin信号相关. 研究了Wnt/β-catenin激活剂LiCl.Cl的作用.
主要成果:
- 发现PMEPA1和NEDD4L在MM细胞中表达的水平很低.
- PMEPA1上调抑制了增殖,诱导了细胞循环停止,并促进了MM细胞的亡.
- PMEPA1直接与NEDD4L结合,增加其表达并调解其抗增殖和亲子亡作用,同时降低Wnt/β-catenin信号元件 (β-catenin,c-Myc,cyclin D1) 的调节. NEDD4L的淘汰措施废除了这些效应.
结论:
- PMEPA1通过与NEDD4L相互作用来抑制Wnt/β-catenin信号通路来抑制多发性骨髓瘤的进展.
- PMEPA1-NEDD4L轴代表了针对MM的潜在治疗策略.
- 对这种途径的进一步研究可能会导致这种血液性恶性瘤的新治疗方法.
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