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KCNN4将PIEZO-依赖的机械传导与NLRP3炎症酶激活联系起来

Li Ran^1,2,3,4, Tao Ye^1,2,3,4, Eric Erbs^1,2,3,4

¹Institut de Génétique et de Biologie Moléculaire et Cellulaire, Illkirch, France.

Science immunology

|December 22, 2023

概括

机械力量通过PIEZO通道和KCNN4激活NLRP3炎症体,从而在冷胺相关周期性综合征 (CAPS) 中驱动自身炎症. 抑制KCNN4可以减少CAPS模型中的炎症.

科学领域:

免疫学免疫学免疫学
细胞生物学细胞生物学
生物物理学的生物物理.

背景情况:

免疫细胞根据微环境线索调节炎症反应.
低氨酸相关周期性综合征 (CAPS) 涉及由环境因素引发的自身炎症,NLRP3炎症酶激活的潜在机制尚不清楚.
在自身炎症性疾病中,NLRP3炎症酶的激活至关重要.

研究的目的:

研究机械传导在NLRP3炎症酶激活中的作用.
在CAPS中确定机械刺激和炎症酶激活之间的分子联系.
探索KCNN4作为CAPS的治疗点.

主要方法:

使用PIEZO1激动剂 (Yoda1) 来探测机械传导通路.
评估了NLRP3炎症酶激活对机械刺激 (刚性,剪切应力) 的反应.
产生了特定于骨髓细胞的PIEZO1/2淘汰赛小鼠,并在CAPS模型中测试了KCNN4抑制.

主要成果:

通过PIEZO介导的机械转导降低了NLRP3炎症酶激活的值.
机械感知硬度和剪切应力增强了NLRP3依赖性炎症.
PIEZO1的激活导致的流入,KCNN4的激活,的流出,以及随后的NLRP3炎症酶的激活.
在CAPS患者细胞和小鼠模型中,KCNN4抑制改善了自身炎症.

结论:

皮佐通道作为机械传感器,将物理线索与NLRP3炎症酶激活联系起来.
KCNN4是PIEZO驱动的炎症酶激活的关键调解者,特别是在CAPS中.
针对KCNN4为像CAPS这样的NLRP3介导的自身炎症性疾病提供了潜在的治疗策略.

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