Nature Communications:揭示淋巴结中重要信号通路,以更好理解病理生理过程

2020-02-12 于晓程 生物探索

韩国基础科学研究所(IBS)的科学家们发现Hippo-YAP/TAZ信号通路在LN的形成和维持中起主要作用。该研究报告发表在《Nature Communications》杂志上。

SARS、MERS以及最近的新型冠状病毒2019-nCoV等病原体已成为全球性威胁。淋巴结(LN)通过为免疫细胞的生长提供庇护所并抵抗病原体,从而与传染病作斗争。但是,人们对LN的特定内部运作方式知之甚少。韩国基础科学研究所(IBS)的科学家们发现Hippo-YAP/TAZ信号通路在LN的形成和维持中起主要作用。该研究报告发表在《Nature Communications》杂志上。


 
LN的关键成分之一是成纤维网状细胞(FRC),它形成LN的基础结构,并通过释放细胞因子(一种对免疫很重要的蛋白)来触发免疫反应。在LN的发展过程中,功能性FRC形成:一个不明确的间充质细胞群分化为FRC前体,然后进一步发展为具有免疫功能的成熟FRC。


在淋巴结的生长和维持过程中,YAP / TAZ活性和p52 / RelB活性协调的重要性
 
该研究小组证实了Hippo途径(一种细胞增殖和器官大小控制的关键调节剂)在FRC成熟过程中的重要性,他们使用了20多种不同的转基因小鼠模型来表征特定时间点的Hippo途径,从而在FRC发展的各个阶段消耗了YAP / TAZ蛋白,通过仔细检查小鼠的LN发现,当FRC前体中的YAP / TAZ降低时,FRC会转变为脂肪细胞。从机理上讲,YAP / TAZ应该与调节FRC的关键成分结合,例如p52,二者之间的相互作用促进了趋化因子表达。


YAP/TAZ耗尽会将FRC前体转化为脂肪细胞
 
这一发现将YAP / TAZ视为FRC成熟的关键调节剂,有望更好地了解FRC介导的病理生理过程。在未来的研究中,将集中于确定影响全身免疫反应的疾病或状况是否可以与FRCs中Hippo信号通路的改变有关,以及调节FRC中Hippo信号传导是否可以作为可行的治疗选择。除了在针对流感的免疫反应中的重要性外,FRC还因其在癌症进展和患者预后中的作用而获得广泛认可。
 
原始出处:
Sung Yong Choi, Hosung Bae , et a. YAP/TAZ direct commitment and maturation of lymph node fibroblastic reticular cells. Nature Communications volume 11, Article number: 519 (2020)  

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    2021-01-27 liye789132251
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    2020-02-14 sodoo
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