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Ref-1氧化还原活性调节内皮细胞中规范的Wnt信号传递
Gabriella D Hartman1, Kamakshi Sishtla2, Eyram K Kpenu3
1Department of Ophthalmology, Indiana University School of Medicine, Indianapolis, IN, USA; Stark Neurosciences Research Institute, Indiana University School of Medicine, Indianapolis, IN, USA.
Redox biology
|April 30, 2025
概括
向APE1/Ref-1氧化还原活性通过降低Wnt/β-catenin信号调节来抑制病态视网膜新血管化. 这揭示了对于缺血性视网膜病变 (如糖尿病视网膜病变和早产视网膜病变) 的新疗法策略.
科学领域:
- 眼科医生 眼科 眼科
- 分子生物学分子生物学
- 血管生物学 血管生物学
背景情况:
- 缺血性视网膜病变,包括多发性糖尿病视网膜病变 (PDR) 和早产视网膜病变 (ROP),由于视网膜异常的新血管化导致失明.
- 目前的抗VEGF治疗有局限性,因为多个信号通路有助于新血管化.
- 准APE1/Ref-1的氧化还原功能已经显示出降低病理性新血管化的潜力.
研究的目的:
- 通过APE1/Ref-1氧化还原活性调节的新信号通路的识别.
- 研究APE1/Ref-1在调节视网膜内皮细胞中Wnt/β-catenin信号传递中的作用.
- 评估APE1/Ref-1抑制剂作为视网膜神经血管疾病的治疗方法.
主要方法:
- 用Ref-1氧化还原抑制剂治疗的人类视网膜内皮细胞 (HREC) 的RNA测序.
- 西方涂抹和定量PCR用于评估基因和蛋白质表达.
- TOPFlash光酶试验测量Wnt转录活动.
- 在体内研究使用氧气诱导视网膜病变的小鼠模型.
主要成果:
- 在HREC中,Ref-1抑制显著降低了Wnt/β-catenin信号的调节.
- 抑制Ref-1降低了Wnt共受体LRP5/6在mRNA和蛋白质水平上的表达.
- Ref-1 抑制剂阻断了Wnt3a诱导的核β-catenin积累和缺氧诱导的Wnt/β-catenin激活.
- 在体内,Ref-1抑制剂APX2009在新血管化的视网膜部位减少了Wnt相关基因表达.
结论:
- APE1/Ref-1氧化还原活性在内皮细胞中调节Wnt/β-catenin信号传递方面发挥着新的作用.
- 向Ref-1氧化还原活性为视网膜神经血管疾病提供了潜在的治疗策略.
- 抑制Ref-1氧化还原活性可以通过调节多个与疾病相关的途径,提供一种新的治疗方法.
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