Year: 2018
Type: article
Abstract: Our previous work demonstrated a protective role of protein S in early diabetic kidney disease (DKD). Protein S exerts antiinflammatory and antiapoptotic effects through the activation of TYRO3, AXL, and MER (TAM) receptors. Among the 3 TAM receptors, we showed that the biological effects of protein S were mediated largely by TYRO3 in diabetic kidneys. Our data now show that TYRO3 mRNA expression is highly enriched in human glomeruli and that TYRO3 protein is expressed in podocytes. Interestingly, glomerular TYRO3 mRNA expression increased in mild DKD but was suppressed in progressive DKD, as well as in focal segmental glomerulosclerosis (FSGS). Functionally, morpholino-mediated knockdown of tyro3 altered glomerular filtration barrier development in zebrafish larvae, and genetic ablation of Tyro3 in murine models of DKD and Adriamycin-induced nephropathy (ADRN) worsened albuminuria and glomerular injury. Conversely, the induction of TYRO3 overexpression specifically in podocytes significantly attenuated albuminuria and kidney injury in mice with DKD, ADRN, and HIV-associated nephropathy (HIVAN). Mechanistically, TYRO3 expression was suppressed by activation of TNF-α/NF-κB pathway, which may contribute to decreased TYRO3 expression in progressive DKD and FSGS, and TYRO3 signaling conferred antiapoptotic effects through the activation of AKT in podocytes. In conclusion, TYRO3 plays a critical role in maintaining normal podocyte function and may be a potential new drug target to treat glomerular diseases.
Source: JCI Insight
Authors: Fang Zhong, Zhaohong Chen, Liwen Zhang, Yifan Xie, Viji Nair, Wenjun Ju, Matthias Kretzler, Robert G. Nelson, Zhengzhe Li, Hongyu Chen, Yongjun Wang, Aihua Zhang, Kyung Lee, Zhihong Liu, John Cijiang He
Institutions: Icahn School of Medicine at Mount Sinai, Nanjing General Hospital of Nanjing Military Command, Nanjing University, Nanjing Children's Hospital, Second Affiliated Hospital of Nanjing Medical University, University of Michigan, National Institutes of Health, National Institute of Diabetes and Digestive and Kidney Diseases, Zhejiang Chinese Medical University, Hangzhou Hospital of Traditional Chinese Medicine, James J. Peters VA Medical Center
Language: English
Subfield: Nephrology
Field: Medicine
Domain: Health Sciences
Open Access status: gold
Estimated APC paid: $4,100
Funders: U.S. Department of Veterans Affairs, Nephcure Foundation, University of Michigan, Rare Diseases Clinical Research Network, Halpin Foundation, National Natural Science Foundation of China, Nanjing University, National Institutes of Health, National Key Research and Development Program of China, National Institute of Diabetes and Digestive and Kidney Diseases, National Center for Advancing Translational Sciences
Awards: G1109909514, G1365178872, G1399558592, G195356861, G2072746484, G2611483633, G3101778425, G359913621, G3729289465, University of Michigan O'Brien Kidney Translational Core Center, Long-term consequences of HIV in the Kidney, Cellular and molecular mechanisms of retinoids in podocytes, G4268767965, G4687801778, G475021081, G504598810, Role of HIPK2 in kidney fibrosis, G5606885492, G6250973615, The Role of LRG1 in Diabetic Kidney Disease, G681041877, G722795277, G7305910460, G764089183, G7959825170, G9000065367, G9000066216, G9000114733, G9000139470, G9000221455
OpenAlex ID: W2901541528