乌比基因酶Cbl和Cbl-b通过控制CSF-1R进口到巨体中来调节巨体的生长
Lu Huang1,2, Natalie W Thiex3,2, Jieqiong Lou1
1Department of Chemistry and Biochemistry, South Dakota State University, Brookings, SD 57007.
Molecular biology of the cell
|January 3, 2024
概括
乌比基连酶Cbl和Cbl-b通过调节CSF-1受体的内细胞分裂和信号传递来控制巨细胞的生长. 两种酶的丧失导致持续的增殖和巨细胞中基因表达的改变.
科学领域:
- 细胞生物学 细胞生物学
- 分子生物学分子生物学
- 免疫学 免疫学 免疫学
背景情况:
- 跨膜受体的ubiquitination对于调节内细胞分裂,细胞内交通和信号传导至关重要.
- Cbl和Cbl-b是已知在信号终止中的作用的泛素酶.
- 骨髓细胞特异性Cbl和Cbl-b双淘汰赛 (DKO) 小鼠表现出骨髓增殖性疾病.
研究的目的:
- 研究乌比基因酶Cbl和Cbl-b在调节殖民地刺激因子1受体 (CSF-1R) 内细胞内转移和内细胞内转移中的重叠功能.
- 阐明Cbl/Cbl-b介导的无处不在对CSF-1R信号传递和巨细胞增殖的影响.
主要方法:
- 产生和分析Cbl/--,Cbl-b/-和Cbl/Cbl-b双击 (DKO) 骨髓衍生的巨细胞.
- 对CSF-1R无处不在,内化和退化的评估.
- 对AKT信号通路和溶酶体贩运的分析.
- 用RNA测序来比较WT,单个和DKO巨细胞的转录概况.
主要成果:
- 与野生型 (WT) 细胞相比,DKO巨细胞显示出CSF-1R无处不在的完全丧失,内部化受损,和持续的AKT信号传递.
- CSF-1R降解发生在DKO细胞中的分布式溶解体中,与WT中的宏类细胞受限降解不同.
- RNA测序揭示了与DKO巨细胞生长因子信号传递,细胞周期,炎症和衰老相关的基因表达的显著改变.
- Cbl-b-/-对转录的影响最小,Cbl-/-对转录影响中等,DKO表现出实质性的转录组变化,表明重叠但不同的功能.
结论:
- Cbl和Cbl-b泛素连接酶在调节CSF-1R内细胞运输和降解方面发挥着重叠的作用.
- 由于Cbl/Cbl-b缺乏,CSF-1R无化失调导致持续的巨细胞增殖和改变的炎症基因表达.
- 这些发现凸显了Cbl/Cbl-b介导的全方位化在控制巨细胞稳态和预防骨髓增殖性疾病方面的关键作用.
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