含有histidine的 dipeptides 保护上皮和内皮细胞屏障免受甲基醇诱导的损伤
Charlotte Wetzel1, Nadia Gallenstein2, Verena Peters1
1Centre for Paediatric and Adolescent Medicine, Medical Faculty Heidelberg, Heidelberg University, Heidelberg, Germany.
Scientific reports
|November 4, 2024
概括
含有histidine的二,如卡诺辛和安森林,可以保护上皮和内皮细胞屏障免受甲基酸 (MG) 的损伤. 它们的保护作用取决于希斯蒂丁甲基化,而不仅仅是MG灭活性.
科学领域:
- 生物化学 生物化学
- 细胞生物学 细胞生物学
- 生理学 生理学 生理学
背景情况:
- 表皮和内皮细胞屏障的完整性对健康至关重要.
- 障碍物破坏与许多疾病有关.
- 碳基应激剂,如甲基酸盐 (MG),有助于屏障功能障碍.
研究的目的:
- 为了研究含有histidine的 dipeptides 对细胞屏障完整性在甲基酸 (MG) 压力下的影响.
- 探索胺甲基化对这些二的保护作用的作用.
- 为了比较 dipeptides 与其他 MG 灭剂的疗效.
主要方法:
- 使用了人类近端管状细胞 (HK-2) 和静脉内皮细胞 (HUVEC).
- 细胞暴露于甲基酸盐 (MG) 和各种含有胺的二 (卡诺辛,安森林,巴列宁).
- 评估过体电阻 (TER),乳透性和区域封闭性 (ZO-1) 蛋白质水平.
主要成果:
- 甲基酸盐 (MG) 显著降低了两种细胞类型的跨体抗性 (TER) 和提高了透性.
- 炭素,素和素改善了MG诱导的屏障功能障碍,恢复了TER和ZO-1水平.
- 伊斯蒂丁及其甲基化形式 (1-/3-甲基伊斯蒂丁) 提供了部分保护,而单独的β-氨酸则没有.
- 已知MG灭剂的aminoguanidine未能保护MG诱导的屏障损失.
结论:
- 含有histidine的 dipeptides,特别是 carnosine 和 anserine,有效地保护上皮质和内皮质屏障的完整性免受甲基酸 (MG) 的侵害.
- 保护机制涉及histidine的甲基化状态,表明其作用超出了简单的MG灭.
- 这些发现突显了特定二的治疗潜力,在与屏障功能障碍和氧化应激相关的疾病中.
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