Up-Regulation of SIRT1 Reduces Endoplasmic Reticulum Stress and Renal Fibrosis

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2016 ◽  
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Jai Won Chang ◽  
Hyosang Kim ◽  
Chung Hee Baek ◽  
Raymond Bok Lee ◽  
Won Seok Yang ◽  
...  
2017 ◽  
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Ying Fan ◽  
Wenzhen Xiao ◽  
Kyung Lee ◽  
Fadi Salem ◽  
Jiejun Wen ◽  
...  

2017 ◽  
Vol 10 (6) ◽  
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Sian E. Piret ◽  
Eric Olinger ◽  
Anita A. C. Reed ◽  
M. Andrew Nesbit ◽  
Tertius A. Hough ◽  
...  

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2016 ◽  
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Shing-Hwa Liu ◽  
Ching-Chin Yang ◽  
Ding-Cheng Chan ◽  
Cheng-Tien Wu ◽  
Li-Ping Chen ◽  
...  

2017 ◽  
Vol 16 (2) ◽  
pp. 1014-1020 ◽  
Author(s):  
Ben Ke ◽  
Na Zhu ◽  
Fuli Luo ◽  
Yang Xu ◽  
Xiangdong Fang

2011 ◽  
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Chih-Kang Chiang ◽  
Shih-Ping Hsu ◽  
Cheng-Tien Wu ◽  
Jenq-Wen Huang ◽  
Hui-Teng Cheng ◽  
...  

2020 ◽  
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Quan Yuan ◽  
Tianhua Xu ◽  
Ying Chen ◽  
Wei Qu ◽  
Dan Sun ◽  
...  

2021 ◽  
Author(s):  
Yong Wu ◽  
Huan Yang ◽  
Sujuan Xu ◽  
Ming Cheng ◽  
Jie Gu ◽  
...  

Inflammatory response and renal fibrosis are the hallmarks of chronic kidney disease (CKD). However, the specific mechanism of aldosterone-induced renal injury in the progress of CKD requires elucidation. Emerging evidence has demonstrated that absent in melanoma 2 (AIM2)-mediated inflammasome activation and endoplasmic reticulum stress (ERS) play a pivotal role in the renal fibrosis. Here, we investigated whether overexpression or deficiency of AIM2 affects ERS and fibrosis in aldosterone-infused renal injury. Interestingly, we found that AIM2 was markedly expressed in the diseased proximal tubules from human and experimental chronic kidney disease. Mechanically, overactivation of AIM2 aggravated aldosterone-induced ERS and fibrotic changes in vitro while knockdown of AIM2 blunted these effects in vivo and vitro. By contrast, AIM2 deficiency ameliorated renal structure and function deterioration, decreased proteinuria levels and lower systolic blood pressure in vivo; silencing of AIM2 blocked inflammasome-mediated signaling pathway, relieved ERS and fibrotic changes in vivo. Furthermore, mineralocorticoid receptor antagonist eplerenone and ERS inhibitor tauroursodeoxycholic acid (TUDCA) had nephroprotective effects on the basis of AIM2 overactivation in vitro while they failed to produce a more remarkable reno-protective effect on the treatment of AIM2 silence in vitro. Notably, the combination of TUDCA with AIM2 knockdown significantly reduced proteinuria levels in vivo. Additionally, immunofluorescence assay identified that apoptosis-associated speck-like protein (ASC) recruitment and Gasdermin-D (GSDMD) cleavage respectively occurred in the glomeruli and tubules in vivo. These findings establish a crucial role for AIM2 inflammasome in aldosterone-induced renal injury, which may provide a novel therapeutic target for the pathogenesis of CKD.


2018 ◽  
Vol 2018 ◽  
pp. 1-13 ◽  
Author(s):  
Yuqing Liu ◽  
Yundan Wang ◽  
Wei Ding ◽  
Yingdeng Wang

Background. Renal fibrosis is a common pathological symptom of chronic kidney disease (CKD). Many studies support that mitochondrial dysfunction and endoplasmic reticulum (ER) stress are implicated in the pathogenesis of CKD. In our study, we investigated the benefits and underlying mechanisms of Mito-TEMPO on renal fibrosis in 5/6 nephrectomy mice. Methods. Mice were randomly divided into five groups as follows: control group, CKD group, CKD + Mito-TEMPO (1 mg·kg−1·day−1) group, CKD + Mito-TEMPO (3 mg·kg−1·day−1) group, and Mito-TEMPO group (3 mg·kg−1·day−1). Renal fibrosis was evaluated by PAS, Masson staining, immunohistochemistry, and real-time PCR. Oxidative stress markers such as SOD2 activity and MDA level in serum and isolated mitochondria from renal tissue were measured by assay kits. Mitochondrial superoxide production was evaluated by MitoSOX staining and Western blot. Mitochondrial dysfunction was assessed by electron microscopy and real-time PCR. ER stress-associated protein was measured by Western blot. Results. Impaired renal function and renal fibrosis were significantly improved by Mito-TEMPO treatment. Furthermore, inflammation cytokines, profibrotic factors, oxidative stress markers, mitochondrial dysfunction, and ER stress were all increased in the CKD group. However, these effects were significantly ameliorated in the Mito-TEMPO treatment group. Conclusions. Mito-TEMPO ameliorates renal fibrosis by alleviating mitochondrial dysfunction and endoplasmic reticulum stress possibly through the Sirt3-SOD2 pathway, which sheds new light on prevention of renal fibrosis in chronic kidney disease.


2015 ◽  
Vol 21 ◽  
pp. 85-86
Author(s):  
William Kurban ◽  
Salma Makhoul Ahwach ◽  
Melanie Thomas ◽  
Luisa Onsteed-Haas ◽  
Michael Haas

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