阿尔法-1抗素对伤口愈合和炎症的氧化依赖作用
Idan Farber1,2, Lihie Sheffer3, Yuval Anav3
1Department of Clinical Biochemistry & Pharmacology, Faculty of Health Sciences, Ben-Gurion University of the Negev, Beer-Sheva, Israel. idani166@gmail.com.
Scientific reports
|November 19, 2025
概括
氧化改变了人类α-1抗素 (hAAT) 的功能. 在失去蛋白酶抑制的同时, hAAT在低氧化状态下保留了抗炎和组织修复的益处,这表明伤口愈合的治疗潜力.
科学领域:
- 生物化学 生化学
- 细胞生物学 细胞生物学
- 伤口治愈研究研究 伤口治愈研究
背景情况:
- 伤口愈合涉及细胞和分子因素的复杂相互作用,受到活性氧物种 (ROS) 的显著影响.
- 在诸如辐射暴露和静脉缺陷等条件下看到的高ROS水平,可能会损害伤口愈合.
- 人类α-1抗素 (hAAT) 是一种已知的抗蛋白酶,具有抗炎和组织保护性质,可能有助于组织修复.
研究的目的:
- 在受损伤愈合的背景下,研究HAAT的氧化修饰如何影响其抗炎和组织保护功能.
- 在辐射引起的皮肤损伤和静脉缺陷模型中评估HaaT在促进伤口关闭方面的有效性.
- 阐明HAAT不同氧化水平对细胞反应,炎症和特定分子通路的影响.
主要方法:
- 在HAAT转基因小鼠对照射皮肤和野生型小鼠使用局部HAAT治疗用于静脉功能不全模型中评估了切割皮肤伤口关闭率.
- 在体外, hAAT被氧化使用过氧化 (H2O2),并分析了其弹性酶抑制,上皮细胞间隙关闭和巨细胞反应.
- 在不同的HAT氧化条件下量化了ROS水平,炎症标记物 (iNOS,catalase,IL-1β,TNFα,CXCL-1) 和NRF2/ARE通路激活.
主要成果:
- 在辐射和铁诱导的静脉缺陷条件下,野生型小鼠的伤口闭合受损.
- hAAT转基因小鼠在正常皮肤和照射皮肤中都显示出加速的伤口愈合;局部 hAAT在静脉缺陷模型中改善了愈合.
- 氧化 hAAT (hAATOX) 失去了弹性酶抑制. 高氧化损害了上皮质的关闭,而低氧化增强了它. 所有的 hAATOX形成了巨细胞ROS和炎症标记的增加,具有差异性的NRF2/ARE通路激活和基于氧化水平的IL-1受体对手表达.
结论:
- 氧化显著改变了HaaAT的功能特征,影响了它的抗炎和组织修复能力.
- 在低氧化应激下,HaaAT保持了有益的抗炎和修复特性,尽管蛋白酶抑制的损失,表明适应当地条件的适应性.
- HAAT疗法在氧化环境中治疗缺陷组织修复方面表现有前途,鉴于其安全性,需要进一步进行临床研究.
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