E2F2通过调节NBR1介导的上皮-介质细胞过渡促进了喘性肺损伤和气道重塑
Long Zhao1, Xiaolan Shi1, Ning Wang1
1Department of Respiratory and Asthma, Xi'an Children's Hospital, No.69, Xijuyuan Lane, Lianhu District, Xi'an, Shaanxi, 710003, China.
E2F转录因子2 (E2F2) 通过通过NBR1-介导的表皮-介质细胞转换 (EMT) 途径驱动气道炎症和重塑来促进喘. 针对E2F2/NBR1轴为喘提供了一个潜在的治疗策略.
科学领域:
- 肺部医学 肺部医学
- 分子生物学分子生物学
- 免疫学 免疫学 免疫学
背景情况:
- 喘是一种慢性呼吸道疾病,涉及炎症和表皮介质介质转变 (EMT) 介导的重塑.
- 对于E2F转录因子2 (E2F2) 在喘发病过程中的作用尚不清楚.
研究的目的:
- 为了研究E2F2在喘发病过程中的作用.
- 探索涉及EMT和NBR1蛋白的潜在分子机制.
主要方法:
- 建立了一个卵泡胺 (OVA) 诱导的喘小鼠模型,并利用E2F2向的shRNA.
- 进行了组织学分析 (HE,PAS,Masson),免疫组织化学,支气管支气管洗液 (BALF) 分析和ELISA.
- 通过使用TGF-β1治疗的人类支气管上皮细胞 (BEAS-2B) 进行了体外实验,其中包括si-E2F2转染,西式涂抹,共免疫沉 (Co-IP),环胺 (CHX) 测定和局部定向突变发生.
主要成果:
- 在喘小鼠肺部中,E2F2表达显著上调.
- E2F2 knockdown减弱的OVA诱导的气道炎症,EMT和肺功能障碍.
- 通过Thr586的酸化,E2F2与NBR1蛋白相互作用并稳定,促进TGF-β1诱导的EMT和炎症反应;NBR1过度表达逆转了E2F2的淘汰效应.
结论:
- 通过调节NBR1介导的EMT,E2F2促进了气道损伤和重塑.
- E2F2/NBR1轴代表了喘治疗的潜在治疗标.
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