通过Nutlin-3a激活肺的p53,可以预防和逆转实验性肺高血压
Nathalie Mouraret1, Elisabeth Marcos, Shariq Abid
1Hôpital Henri Mondor, Service de Physiologie-Explorations Fonctionnelles, Créteil, France.
Circulation
|March 21, 2013
概括
努特林-3a在肺动脉光滑肌细胞中诱导细胞衰老,通过限制细胞增殖,为肺高血压 (PH) 提供潜在的治疗方法. 这种前性疗法在减少PH严重性和相关并发症方面表现有前途.
科学领域:
- 细胞衰老 细胞衰老
- 瘤抑制蛋白质是一种瘤抑制蛋白质.
- 心血管研究的心血管研究.
背景情况:
- 通过p53激活诱导的细胞衰老是扩散性疾病的新策略.
- 营养素抑制MDM2,一个p53调节器,以激活p53.
- 肺高血压 (PH) 涉及肺动脉平滑肌肉细胞 (PA-SMC) 的增殖.
研究的目的:
- 为了调查Nutlin-3a诱导PA-SMC中的衰老是否可以治疗PH.
- 为了确定Nutlin-3a在PH模型上的治疗效果.
主要方法:
- 努特林-3a对培养的人类PA-SMCs的治疗.
- 在体内研究使用PH的小鼠模型 (慢性缺氧,SU5416/缺氧,SM22-5HTT+小鼠).
- 评估衰老标志物,p53通路激活和PH相关参数 (右心室缩,肺动脉肌肉化).
主要成果:
- 在实验室中,Nutlin-3a诱导了PA-SMC衰老,增长停止和p53向基因表达.
- 每日Nutlin-3a治疗剂量取决于小鼠的降低PH,右心室缩和肺动脉肌肉化.
- 努特林-3a在小鼠模型中部分逆转了已建立的PH,并且需要p53和p21才能发挥作用.
- 在重塑的肺血管中发现了MDM2,这表明它有可能成为治疗点.
结论:
- 努特林-3a在肺高血压中显示出治疗潜力.
- 通过使用Nutlin-3a的前性方法针对PA-SMC显示出PH治疗的前景.
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