4-Hydroxynonenal通过调节癌症干细胞命运来促进结肠直肠癌的进展
Xu Huang1,2, Lin Huang3, Chunhua Ma1,2
1Nantong Institute of Genetics and Reproductive Medicine, Affiliated Maternity and Child Healthcare Hospital of Nantong University, Nantong, China.
Antioxidants & redox signaling
|September 12, 2024
概括
在结肠直肠癌 (CRC) 中,4-hydroxynonenal (4-HNE) 激活了刺信号,保护癌症干细胞 (CSC) 免受损伤. 这促进了CSC自我更新和瘤生长,提供了新的治疗点.
科学领域:
- 分子瘤学和氧化还原生物学.
- 瘤微环境和癌症干细胞 (CSC) 调节
背景情况:
- 瘤微环境 (TME) 对于维持癌症干细胞 (CSCs) 来说至关重要.
- 4-hydroxynonenal (4-HNE),一种脂质过氧化的产物,在结直肠癌 (CRC) 的TME中丰富.
- 4-HNE在CSC调节和CRC进展中的具体作用尚不清楚.
研究的目的:
- 为了研究4-hydroxynonenal (4-HNE) 对癌症干细胞 (CSC) 命运的影响.
- 阐明4-HNE影响结肠直肠癌 (CRC) 进展的机制.
- 探索在CRC治疗中准4-HNE介导途径的潜力.
主要方法:
- 人类CRC细胞用4-HNE进行了治疗.
- 使用定量实时PCR,免疫光和流细胞测量来分析CSC信号.
- 在异种移植小鼠模型中进行生物信息分析和验证.
主要成果:
- 在LGR5+ CSC中,4-HNE激活了非正规的刺 (HH) 信号和同类重组修复 (HRR) 途径.
- 阻断HH信号增加了DNA损伤标记,表明4-HNE诱导双链DNA断裂 (DSB) 并激活HRR进行保护.
- 4-HNE增加了LGR5+ CSC群体,促进了不对称的分裂,增强了自我更新和分化,并在体内促进了瘤生长.
结论:
- 4-HNE 作为CRC TME中的信号诱导剂,激活HH信号,保护CSC免受氧化损伤.
- 4-HNE增强CSC的扩散和不对称的分裂,从而促进瘤的生长.
- 这些发现突出了氧化应激在调节CSC命运中的作用,并建议针对CRC中的4-HNE/HH途径的潜在治疗策略.
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