Xifu Ye
Chenlu Zhang
Jiabao Wang
Zeyuan Guan
Juzhen Yan
Lu Xu
Ke Wang
Di Guan
Qian Liang
Jian Mao
Junzhi Zhou
Qian Zhang
Xiaoying Wu
Miao Wang
Yu-Sheng Cong
Jiang Liu
a Key Laboratory of Aging and Cancer Biology of Zhejiang Province, Department of Cell Biology and Genetics, School of Medicine, Hangzhou Normal University, Hangzhou, Zhejiang 310036, China;
b Department of Nephrology, The Affiliated Hospital of Hangzhou Normal University, Hangzhou, Zhejiang 310015, China
Funds: We would like to thank Dr. Haibin Wei, Dr. Ying Wang, and Junyi Wang for the help with experiments. This work was supported by grants from the National Natural Science Foundation of China (31871416, 31730020), the Natural Science Foundation of Zhejiang Province of China (LY18C070001), and the Hangzhou Science and Technology Bureau (20182014B01, 20180533B27).
Received Date: 2020-12-23
Accepted Date:2021-04-01
Rev Recd Date:2021-03-29
Publish Date:2021-05-20
Abstract
Abstract
The UFMylation modification is a novel ubiquitin-like conjugation system, consisting of UBA5 (E1), UFC1 (E2), UFL1 (E3), and the conjugating molecule UFM1. Deficiency in this modification leads to embryonic lethality in mice and diseases in humans. However, the function of UFL1 is poorly characterized. Studies on Ufl1 conditional knockout mice have demonstrated that the deletion of Ufl1 in cardiomyocytes and in intestinal epithelial cells causes heart failure and increases susceptibility to experimentally induced colitis, respectively, suggesting an essential role of UFL1 in the maintenance of the homeostasis in these organs. Yet, its physiological function in other tissues and organs remains completely unknown. In this study, we generate the nephron tubules specific Ufl1 knockout mice and find that the absence of Ufl1 in renal tubular results in kidney atrophy and interstitial fibrosis. In addition, Ufl1 deficiency causes the activation of unfolded protein response and cell apoptosis, which may be responsible for the kidney atrophy and interstitial fibrosis. Collectively, our results have demonstrated the crucial role of UFL1 in regulating kidney function and maintenance of endoplasmic reticulum homeostasis, providing another layer of understanding kidney atrophy.Keywords: UFMylation modification,
Ufl1,
Ufl1fl/flPAX8Cre/+ mice,
UPR-PERK signaling pathway,
ER stress-induced apoptosis,
Kidney atrophy
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