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埃布塞伦通过潜在的线粒度机制保护XPC缺乏细胞免受H2O2引起的氧化应激
Thiago S Freire1, Milena S Martins1, Neiliane Sima1
1Depto. de Bioquímica, Instituto de Química, Universidade de São Paulo, SP, 05508-000, Brazil.
Free radical biology & medicine
|May 30, 2025
概括
埃布塞伦在Xeroderma pigmentosum群C纤维细胞中表现出hormesis,在低剂量时显示出保护作用,在高剂量时显示出毒性. 它影响细胞氧化还原平衡,线粒体功能和适应性反应,N-乙半氨酸 (NAC) 可减轻不良影响.
科学领域:
- 生物化学 生化学
- 细胞生物学 细胞生物学
- 药理学 药理学是指药理学的学科.
背景情况:
- Xeroderma pigmentosum C组 (XP-C) 纤维细胞表现出慢性氧化还原失衡和过氧化 (H2O2) 的升高.
- XP-C 细胞作为评估具有抗氧化性质的化合物的模型.
- 埃布塞伦具有谷氨过氧化酶 (GPx) 模仿活性.
研究的目的:
- 为了研究埃布塞伦对XP-C纤维细胞的影响.
- 描述ebselen的剂量依赖性作用及其对细胞氧化还原和线粒体功能的影响.
主要方法:
- 使用XP-C纤维细胞进行基于细胞的测定.
- 细胞毒性,H2O2水平,氧耗 (OCR),细胞外酸化率 (ECAR),GSH/GSSG比率和NRF-2表达的评估.
- 用不同剂量的埃布塞伦和N-乙半氨酸 (NAC) 治疗.
主要成果:
- 埃布塞伦证明了hormesis,在低剂量下保护细胞,在高剂量下增加细胞毒性.
- 长期使用ebselen治疗降低了H2O2的产生和p53的水平.
- 急性埃布塞伦治疗降低了线粒体功能 (OCR,ECAR),降低了GSH/GSSG比率,并增加了NRF-2表达,表明了氧化还原应激和适应性反应.
- 纳克治疗防止了埃布塞伦诱导的线粒体功能减弱和NRF-2激活,并保护了细胞毒性.
结论:
- 埃布塞伦在XP-C细胞中表现出剂量依赖的抑制作用.
- 急性埃布塞伦治疗会诱导氧化还原应激,可能引发线粒度反应.
- 减少GSH/GSSG比率是ebselen作用的早期事件,NAC可以抵消其有害影响.
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