修改SUMO1稳定了TET3蛋白,并增加了结肠直肠癌辐射治疗的敏感性
Fengting Liu1, Ya Ma2, Hao Sun3
1Institute of Radiation Medicine, Chinese Academy of Medical Sciences and Peking Union Medical College, Tianjin, China; Department of Radiation Oncology, The Afliated Cancer Hospital of Zhengzhou University, No. 127 Dongming Road, Zhengzhou 450008, Henan, China.
概括
十-十一转位3 (TET3) 蛋白增强结直肠癌 (CRC) 对放射治疗的敏感性. TET3的SUMOylation稳定了其表达,增加了辐射敏感性,并为CRC治疗提供了潜在的治疗点.
科学领域:
- 在瘤学瘤学.
- 分子生物学分子生物学
- 癌症研究 癌症研究
背景情况:
- 结肠直肠癌 (CRC) 在全球范围内仍然是一个重大的健康问题.
- 放射治疗是许多癌症的基石治疗,包括CRC.
- 了解增强放射敏感性的分子机制对于改善治疗结果至关重要.
研究的目的:
- 研究活性DNA脱甲基酶,特别是十-十一转位3 (TET3) 在结肠直肠癌 (CRC) 辐射敏感化中的作用.
- 阐明DNA脱甲基化影响瘤放射敏感化的机制.
主要方法:
- 在CRC细胞系中TET3的过度表达和淘汰 (siRNA) (HCT 116,LS 180).
- 通过G2/M停止,细胞灭绝,DNA损伤和克隆原抑制试验来评估辐射敏感性.
- 使用免疫光,细胞质核提取和共免疫沉,分析TET3与SUMO1和SUMO2/3的相互作用.
主要成果:
- TET3表达与CRC恶性瘤和辐射敏感性正相关.
- 在CRC细胞中,TET3过度表达增强了辐射诱导的亡,G2/M停止,DNA损伤和克隆抑制.
- 在特定的lysine位点 (K479,K758,K1012,K1188,K1397,K1623) 进行TET3的SUMOylation,增加了蛋白质稳定性和核定位,增加了放射性敏感性.
结论:
- TET3在使CRC细胞对放射治疗敏感方面发挥着关键作用.
- 通过SUMOylation介导的TET3稳定是增强CRC辐射敏感性的关键机制.
- 向TET3 SUMOylation是改善结直肠癌放射治疗结果的潜在策略.
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