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与年龄相关的听力损失中超增强器介导的铁:耳表观基因组学
Chanyuan Zhang1,2,3, Ting Yang3, Xiaoqin Luo4
1Qingdao Medical College, Qingdao University, Qingdao, China.
Cellular and molecular life sciences : CMLS
|March 7, 2026
概括
减少Sp1与Fth1超增强体的结合,通过促进毛细胞铁亡,导致与年龄相关的听力损失. 准超级增强剂和铁灭症为保护听力提供了新的治疗途径.
科学领域:
- 遗传学和分子生物学
- 耳鼻喉科 耳鼻喉科 耳鼻喉科
- 细胞生物学 细胞生物学
背景情况:
- 与年龄相关的听力损失 (ARHL) 或长是老年人群中普遍存在的疾病,其潜在机制尚不清楚.
- 这项研究调查了超增强剂 (SE) 和Sp1转录因子在毛细胞 (HC) 衰老和铁亡中的作用.
研究的目的:
- 探索ARHL中HC衰老和铁亡的调节机制.
- 为了确定SEs和Sp1在与年龄相关的听力损失的进展中的参与.
主要方法:
- 生物信息学分析 (使用SEdb 2.0进行TREA,SE预测) 以确定监管机构和目标.
- 在小鼠和细胞模型中的实验验证使用ABR,免疫光,西斑和RT-qPCR.
- CUT&Tag测试用于绘制Sp1结合部位的地图.
主要成果:
- 随着年龄的增长,Sp1与Fth1 SE结合的减少导致Fth1转录和铁积累的减少.
- 这导致HC铁,增加ROS,并促进耳衰老和ARHL.
- 在体内SE抑制 (JQ-1) 证实了SE活动在维持听觉功能的关键作用.
结论:
- Sp1和Fth1是HC衰老和ARHL通过铁亡的关键调节者.
- 调节SEs和抑制铁亡为ARHL提供了潜在的治疗策略.
- 针对SEs,Sp1,Fth1和ferroptosis之间的相互作用,为保护听力提供了新的AAV基因治疗方法.
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