缺氧诱导因子1α调节支气管上皮细胞中阿克罗林诱导的细胞损伤
Asha Ashraf1, Bernd Zechmann2, Erica D Bruce1
1Department of Environmental Science, Baylor University, 101 Bagby Ave, Waco, TX 76706, USA.
Toxicology
|April 19, 2025
概括
缺氧诱导因子1α (HIF-1α) 保护肺细胞免受阿克罗莱因损伤. 沉默HIF-1α会恶化细胞损伤和DNA损伤,特别是在低氧环境中,突出显示HIF-1α的保护作用.
科学领域:
- 环境毒理学环境毒理学
- 细胞生物学 细胞生物学
- 分子医学是分子医学.
背景情况:
- 阿克罗莱因是一种有毒的环境污染物,来自不完全燃烧.
- 暴露于阿克罗莱因会导致细胞损伤和氧化应激.
- 缺氧诱导因子1α (HIF-1α) 调节细胞生存和血管生成.
研究的目的:
- 调查HIF-1α在保护支气管上皮细胞免受阿克罗莱因的影响中的作用.
- 评估阿克罗莱因在正常和缺氧的情况下对具有和没有HIF-1α的细胞的影响.
- 探索HIF-1α沉默如何影响细胞毒性,代谢活性,DNA损伤和氧化应激.
主要方法:
- 使用了BEAS-2B支气管上皮细胞系.
- 在正常和缺氧条件下对acrolein进行细胞反应的比较.
- 在HIF-1α沉默后评估了细胞毒性,代谢活性,DNA损伤和氧化应激标志物.
主要成果:
- 沉默HIF-1α显著增加了由阿克罗林诱导的细胞损伤和降低活力,特别是在低氧状态下.
- 细胞毒性和DNA损伤在低氧条件下的HIF-1α沉默细胞中明显高于正常氧.
- 在HIF-1α沉默后,氧化应激标记在缺氧下没有显著增加.
结论:
- HIF-1α对烯蛋白诱导的细胞毒性和DNA损伤起着关键的保护作用.
- 在低氧条件下,HIF-1α的保护作用更加明显.
- 需要进一步的研究,以了解HIF-1α在适应环境和低氧压力因素的肺部疾病中的作用.
相关概念视频
01:20Chronic Obstructive Pulmonary Disease-II: Pathophysiology
2.7K
Chronic Obstructive Pulmonary Disease (COPD) pathophysiology is intricate and multifaceted, involving a complex interplay of physiological processes. Understanding these mechanisms is crucial for effectively managing and treating COPD. Here is an in-depth look at the critical elements in the pathophysiology of COPD:
Chronic Inflammation
Chronic Inflammation
2.7K
01:21Acute Respiratory Failure-II
156
Type I Respiratory Failure, or hypoxemic respiratory failure, occurs when the partial pressure of oxygen (PaO2) in arterial blood falls below 60 mmHg while breathing room air without a corresponding increase in arterial carbon dioxide levels (PaCO2). This condition highlights a significant impairment in the lungs' capacity to oxygenate the blood.
The underlying physiological abnormalities that contribute to hypoxemic respiratory failure include:
The underlying physiological abnormalities that contribute to hypoxemic respiratory failure include:
156
01:24Regulation of Angiogenesis and Blood Supply
2.5K
Rapidly dividing tumors, embryos, and wounded tissues require more oxygen than usual, lowering the oxygen concentration in the blood. At low oxygen or hypoxic conditions, an oxygen-sensitive transcription factor called the hypoxia-inducible factor 1 or HIF1 is activated. HIF1 is a dimeric protein of alpha (ɑ) and beta (β) subunits. Under optimal oxygen conditions, HIF1β is present in the nucleus while HIF1ɑ remains in the cytosol. HIF1ɑ is hydroxylated by prolyl...
2.5K