IL-1 receptor signaling in podocytes limits susceptibility to glomerular damage.

IL-1 receptor signaling in podocytes limits susceptibility to glomerular damage.
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足细胞中的 IL-1 受体信号传导限制了肾小球损伤的易感性。

DOI:
10.1152/ajprenal.00353.2021
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发表时间:
2022
期刊:
American journal of physiology. Renal physiology
影响因子:
--
通讯作者:
Crowley,StevenD
Crowley,StevenD
中科院分区:
--
文献类型:
--
作者:
Ren,Jiafa;Lu,Xiaohan;Hall,Gentzon;Privratsky,JamieR;Robson,MatthewJ;Blakely,RandyD;Crowley,StevenD

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白细胞介素 (IL)-1 受体 1 型 (IL-1R1) 激活会触发促炎信号级联反应,从而加剧肾损伤。然而,足细胞 IL-1R1 在肾小球疾病中的功能仍不清楚。为了研究足细胞中 IL-1R1 信号传导的作用,我们选择性地消除了小鼠(PKO 小鼠)中的足细胞 IL-1R1。然后,我们对 PKO 小鼠和野生型对照小鼠进行两种肾小球损伤模型:肾毒性血清 (NTS) 和阿霉素诱导的肾病。令人惊讶的是,我们发现足细胞中 IL-1R1 的激活限制了 NTS 和阿霉素诱导的肾病期间的蛋白尿和足细胞损伤。此外,足细胞中 IL-1R1 的缺失会通过减少 Akt 激活来驱动足细胞凋亡和肾小球损伤。 Akt 信号传导的激活消除了 NTS 期间野生型和 PKO 小鼠之间白蛋白尿和足细胞损伤的差异。因此,足细胞中的 IL-1R1 信号传导通过 Akt 依赖性信号传导途径限制了肾小球损伤的易感性。这些数据确定了足细胞中 IL-1R1 信号传导在肾小球疾病发病机制中的意想不到的保护作用。新的和值得注意的本研究证实,白细胞介素 1 受体的激活通过刺激足细胞内的 Akt 信号级联反应来限制临床前小鼠模型中肾小球损伤的易感性。
Interleukin (IL)-1 receptor type 1 (IL-1R1) activation triggers a proinflammatory signaling cascade that can exacerbate kidney injury. However, the functions of podocyte IL-1R1 in glomerular disease remain unclear. To study the role of IL-1R1 signaling in podocytes, we selectively ablated podocyte IL-1R1 in mice (PKO mice). We then subjected PKO mice and wild-type controls to two glomerular injury models: nephrotoxic serum (NTS)- and adriamycin-induced nephropathy. Surprisingly, we found that IL-1R1 activation in podocytes limited albuminuria and podocyte injury during NTS- and adriamycin-induced nephropathy. Moreover, deletion of IL-1R1 in podocytes drove podocyte apoptosis and glomerular injury through diminishing Akt activation. Activation of Akt signaling abrogated the differences in albuminuria and podocyte injury between wild-type and PKO mice during NTS. Thus, IL-1R1 signaling in podocytes limits susceptibility to glomerular injury via an Akt-dependent signaling pathway. These data identify an unexpected protective role for IL-1R1 signaling in podocytes in the pathogenesis of glomerular disease.NEW & NOTEWORTHYThe present study establishes that activation of the receptor for interleukin-1 limits susceptibility to damage to the kidney glomerulus in preclinical mouse models by stimulating Akt signaling cascades inside the podocyte.
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