杜比基因酶OTUD5通过稳定YAP来促进硬度诱导的肝星细胞激活
Siying Jia1, Yongshen Niu1, Nafeisha Nuernijiati1
1Department of Hepatobiliary Surgery, The First Affiliated Hospital of Xi'an Jiaotong University, Xi'an, 710061, Shaanxi, China.
矩阵刚性通过OTU二维基因酶5 (OTUD5) 和Yes相关蛋白 (YAP) 激活肝星细胞 (HSC). 这种OTUD5/YAP反循环驱动着结直肠肝转移的进展,提供了一个潜在的治疗点.
科学领域:
- 细胞生物学 细胞生物学
- 在瘤学瘤学.
- 生物化学 生物化学
背景情况:
- 肝星细胞 (HSC) 激活成促进瘤的肌纤维细胞是结直肠肝转移的关键驱动因素.
- 矩阵刚度,与细胞因子一起,显著促进HSC激活.
- 在硬度诱导的HSC激活中,OTU二维基因酶5 (OTUD5) 的作用尚不清楚.
研究的目的:
- 阐明OTUD5在矩阵刚性诱导的HSC激活中的分子机制.
- 在这个过程中,研究OTUD5和Yes相关蛋白 (YAP) 之间的相互作用.
- 评估OTUD5/YAP轴对结直肠肝转移的功能影响.
主要方法:
- 使用聚烯胺水凝模拟矩阵刚度.
- 通过西方涂抹,免疫光和RT-qPCR评估蛋白质和mRNA表达.
- 使用共免疫沉研究了OTUD5-YAP相互作用和YAP无化.
- 在体内评估癌细胞的扩散,入侵和瘤生长.
主要成果:
- 刚性基板显著增加了HSC中的OTUD5表达,这取决于YAP.
- OTUD5 knockdown 减弱硬度诱导的 HSC 激活和 YAP 稳定.
- OTUD5二基因化YAP,增强其稳定性并促进YAP目标基因表达 (CTGF,CYR61).
- 降低OTUD5降低了HSC介导的癌细胞增殖,入侵和瘤生长.
结论:
- 一个关键的OTUD5/YAP反循环介导硬度诱导的HSC激活.
- OTUD5通过去除K48泛素链来稳定YAP,促进结直肠肝转移.
- 准OTUD5/YAP轴为结直肠肝转移提供了潜在的治疗策略.
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