中性粒细胞将弹性酶插入肝细胞,以调节与酒精相关的肝炎中的信号传递
Noriyoshi Ogino1, M Fatima Leite1,2, Mateus T Guerra1
1Yale Liver Center, Yale University School of Medicine, New Haven, Connecticut, USA.
The Journal of clinical investigation
|June 25, 2024
概括
中性粒细胞将弹性酶输送到肝细胞中,降解通道以控制细胞增殖而不会造成伤害. 在与酒精相关的肝炎中观察到的这种相互作用揭示了调节肝细胞活动的新机制.
科学领域:
- 肝病学 肝病学是一种肝病学.
- 免疫学 免疫学 免疫学
- 细胞生物学 细胞生物学
背景情况:
- 中性粒细胞的透在肝脏疾病中很常见,但它们与肝细胞的确切相互作用仍然不太清楚.
- 中性粒细胞蛋白酶可以具有破坏性或调节组织重塑和代谢.
- 研究了一种新型的,非细胞毒性的中性粒细胞-肝细胞相互作用机制.
研究的目的:
- 阐明以前未知的中性粒细胞与肝细胞相互作用的机制.
- 研究中性粒细胞弹性酶在调节肝细胞功能中的作用.
- 探索这种相互作用对与酒精相关的肝炎的影响.
主要方法:
- 直接观察中性粒细胞颗粒转移到肝细胞.
- 对弹性酶活性及其对细胞内通道的影响的分析 (ITPR2).
- 肝细胞增殖和Serpin E2和A3.3的表达的评估.
- 检查酒精相关性肝炎患者样本,并对小鼠模型进行验证.
主要成果:
- 中性粒细胞直接将含有弹性酶的颗粒插入肝细胞.
- 弹性酶选择性降解细胞内通道 (ITPR2),减少肝细胞增殖,没有细胞毒性.
- 肝细胞上调了Serpin E2和A3,抑制了弹性酶活性,表明这是一个可逆的过程.
- 在酒精相关性肝炎患者样本和小鼠模型中观察到弹性酶插入和ITPR2降解.
- 来自酒精相关性肝炎患者的中性粒细胞显示出增加的脱粒和降低通道表达的效力.
结论:
- 中性粒细胞采用一种新的,非破坏性的机制,通过颗粒插入和弹性酶递送来调节肝细胞的增殖.
- 这种相互作用暂时调节肝细胞信号传递,为肝病病原发生提供了新的视角.
- 这些发现强调了中性粒细胞在控制肝细胞行为的独特作用,特别是在与酒精有关的肝炎中.
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