G蛋白结合受体OXER1是一种组织氧化还原传感器,对于肠道上皮质屏障完整性至关重要
Miklos Lengyel1, Yanan Ma1, Zaza Gelashvili1,2
1Cell Biology Program, Memorial Sloan Kettering Cancer Center, New York, NY 10065, USA.
反应性氧物种 (ROS) 适应是天生的免疫的关键. 这项研究揭示了5-oxo-eicosatetraenoic acid (5-KETE) 和它的受体OXER1通过诱导DNA修复机制来保护粘膜壁垒免受氧化应激.
科学领域:
- 生物化学 生物化学
- 免疫学 免疫学 免疫学
- 细胞生物学 细胞生物学
背景情况:
- 反应性氧物种 (ROS) 对天生的免疫非常重要,但需要宿主适应粘膜壁垒.
- 宿主细胞中低ROS耐受性可能导致炎症和癌症发生.
- 介导宿主对ROS耐受性的机制尚不清楚.
研究的目的:
- 研究氧化还原敏感脂质5-oxo-eicosatetraenoic acid (5-KETE) 在细胞氧化还原适应中的作用.
- 探索通过其受体OXER1传递5-KETE信号的非免疫功能,以保持粘膜屏障的完整性.
主要方法:
- 利用斑马鱼幼虫和培养人类细胞来研究ROS耐受机制.
- 研究了OXER1正位素 (Hcar1-4) 损失对斑马鱼肠道屏障功能的影响.
- 通过OXER1信号传导评估了通过OXER1信号传导诱导保护DNA的Nudix酸酶.
主要成果:
- 在斑马鱼中,OXER1 的正统基因 Hcar1-4 丢失导致了肠道屏障缺陷和炎症.
- 发现OXER1信号保护斑马鱼和人类细胞免受氧化核酸损伤.
- 这种保护是通过诱导保护DNA的Nudix酸酶来实现的.
结论:
- 涉及5-KETE和OXER1的oxoeicosanoid通路代表了ROS弹性的一种保存机制.
- 这一途径强化了暴露于病原体的粘膜外层,以抵抗氧化应激.
- 了解这种机制,可以了解预防ROS诱导的炎症和疾病.
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