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Guo Z, Guo Q, Li X, Gao X, Zhang L, Xu K. Urinary biomarkers associated with podocyte injury in lupus nephritis. Front Pharmacol 2024; 15:1324540. [PMID: 38313309 PMCID: PMC10834635 DOI: 10.3389/fphar.2024.1324540] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/30/2023] [Accepted: 01/10/2024] [Indexed: 02/06/2024] Open
Abstract
The most prevalent and devastating form of organ damage in systemic lupus erythematosus (SLE) is lupus nephritis (LN). LN is characterized by glomerular injury, inflammation, cell proliferation, and necrosis, leading to podocyte injury and tubular epithelial cell damage. Assays for urine biomarkers have demonstrated significant promise in the early detection of LN, evaluation of disease activity, and tracking of reaction to therapy. This is because they are non-invasive, allow for frequent monitoring and easy self-collection, transport and storage. Podocyte injury is believed to be a essential factor in LN. The extent and type of podocyte injury could be connected to the severity of proteinuria, making podocyte-derived cellular debris and injury-related urinary proteins potential markers for the diagnosis and monitoring of LN. This article focuses on studies examining urinary biomarkers associated with podocyte injury in LN, offering fresh perspectives on the application of biomarkers in the early detection and management of LN.
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Affiliation(s)
| | | | | | | | | | - Ke Xu
- Third Hospital of Shanxi Medical University, Shanxi Bethune Hospital, Shanxi Academy of Medical Sciences, Tongji Shanxi Hospital, Taiyuan, China
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Sun M, Shi G, Zhang X, Kan C, Xie S, Peng W, Liu W, Wang P, Zhang R. Deciphering roles of protein post-translational modifications in IgA nephropathy progression and potential therapy. Aging (Albany NY) 2024; 16:964-982. [PMID: 38175721 PMCID: PMC10817402 DOI: 10.18632/aging.205406] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/05/2023] [Accepted: 11/16/2023] [Indexed: 01/05/2024]
Abstract
Immunoglobulin A nephropathy (IgAN), one type of glomerulonephritis, displays the accumulation of glycosylated IgA in the mesangium. Studies have demonstrated that both genetics and epigenetics play a pivotal role in the occurrence and progression of IgAN. Post-translational modification (PTM) has been revealed to critically participate in IgAN development and progression because PTM dysregulation results in impaired degradation of proteins that regulate IgAN pathogenesis. A growing number of studies identify that PTMs, including sialylation, o-glycosylation, galactosylation, phosphorylation, ubiquitination and deubiquitination, modulate the initiation and progression of IgAN. Hence, in this review, we discuss the functions and mechanisms of PTMs in regulation of IgAN. Moreover, we outline numerous compounds that govern PTMs and attenuate IgAN progression. Targeting PTMs might be a useful strategy to ameliorate IgAN.
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Affiliation(s)
- Mengying Sun
- Department of Nephrology, Zhuhai People’s Hospital, Zhuhai Clinical Medical College of Jinan University, Zhuhai, Guangdong 519000, China
| | - Guojuan Shi
- Department of Nephrology, Zhuhai People’s Hospital, Zhuhai Clinical Medical College of Jinan University, Zhuhai, Guangdong 519000, China
| | - Xiaohan Zhang
- Department of Nephrology, Zhuhai People’s Hospital, Zhuhai Clinical Medical College of Jinan University, Zhuhai, Guangdong 519000, China
| | - Chao Kan
- Department of Nephrology, Zhuhai People’s Hospital, Zhuhai Clinical Medical College of Jinan University, Zhuhai, Guangdong 519000, China
| | - Shimin Xie
- Department of Nephrology, Zhuhai People’s Hospital, Zhuhai Clinical Medical College of Jinan University, Zhuhai, Guangdong 519000, China
| | - Weixiang Peng
- Department of Nephrology, Zhuhai People’s Hospital, Zhuhai Clinical Medical College of Jinan University, Zhuhai, Guangdong 519000, China
| | - Wenjun Liu
- Department of Medicine, Zhejiang Zhongwei Medical Research Center, Hangzhou, Zhejiang 310018, China
| | - Peter Wang
- Department of Medicine, Zhejiang Zhongwei Medical Research Center, Hangzhou, Zhejiang 310018, China
| | - Rui Zhang
- Department of Nephrology, Zhuhai People’s Hospital, Zhuhai Clinical Medical College of Jinan University, Zhuhai, Guangdong 519000, China
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Li L, Xu K, Bai X, Wang Z, Tian X, Chen X. UCHL1 regulated by Sp1 ameliorates cochlear hair cell senescence and oxidative damage. Exp Ther Med 2023; 25:94. [PMID: 36761006 PMCID: PMC9905655 DOI: 10.3892/etm.2023.11793] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/08/2022] [Accepted: 12/09/2022] [Indexed: 01/11/2023] Open
Abstract
Age-related hearing loss (ARHL) is the most common cause of hearing loss in the elderly. Ubiquitin carboxyl-terminal hydrolase L1 (UCHL1) is a deubiquitinating enzyme involved in several types of human disease. The present study aimed to investigate the effect of UCHL1 on a hydrogen peroxide (H2O2)-induced ARHL model in cochlear hair cells and uncover its underlying mechanism. Reverse transcription-quantitative (RT-q)PCR and western blot analysis were used to assess UCHL1 expression in HEI-OC1 cells exposed to H2O2. Following UCHL1 overexpression in H2O2-induced HEI-OC1 cells, cell activity was assessed by Cell Counting Kit-8 assay. The content of oxidative stress-associated markers including superoxide dismutase (SOD), glutathione peroxidase (GSH-Px) and reactive oxygen species (ROS ) was measured using corresponding commercial kits. Cell apoptosis was evaluated by TUNEL assay and western blot analysis. Cell senescence was assessed by senescence-associated β-galactosidase staining and western blot analysis. RT-qPCR and western blot analysis were applied to measure mRNA and protein expression levels, respectively, of specificity protein 1 (Sp1) in H2O2-treated HEI-OC1 cells. In addition, the association between UCHL1 and Sp1 was verified by luciferase reporter and chromatin immunoprecipitation (ChIP) assay. The mRNA and protein expression levels of UCHL1 were also determined in Sp1-overexpressing cells by RT-qPCR and western blot analysis, respectively. Following Sp1 overexpression in UCHL1-overexpressing H2O2-treated HEI-OC1 cells, cell activity, oxidative stress, apoptosis and senescence were assessed. Finally, the expression levels of NF-κB signaling-related proteins p-NF-κB p65 and NF-κB p65 were detected using western blot analysis. The results showed that UCHL1 was downregulated in H2O2-treated HEI-OC1 cells. In addition, UCHL1 overexpression enhanced cell viability and promoted oxidative damage, apoptosis and senescence in H2O2-induced HEI-OC1 cells. Furthermore, Sp1 was upregulated in H2O2-treated HEI-OC1 cells. Additionally, luciferase reporter and ChIP assays demonstrated that Sp1 interacted with the UCHL1 promoter to inhibit UCHL1 transcription. Sp1 overexpression reversed the effect of UCHL1 overexpression on cell viability, oxidative stress, apoptosis, senescence and activation of the NF-κB signaling pathway in H2O2-exposed HEI-OC1 cells. Collectively, the results suggested that UCHL1 transcriptional suppression by Sp1 protected cochlear hair cells from H2O2-triggered senescence and oxidative damage.
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Affiliation(s)
- Lihua Li
- Department of Otorhinolaryngology, The Second Affiliated Hospital of Nanchang University, Nanchang, Jiangxi 330006, P.R. China
| | - Kai Xu
- Department of Otorhinolaryngology, The Second Affiliated Hospital of Nanchang University, Nanchang, Jiangxi 330006, P.R. China
| | - Xue Bai
- Department of Otorhinolaryngology, The Second Affiliated Hospital of Nanchang University, Nanchang, Jiangxi 330006, P.R. China
| | - Zhi Wang
- Department of Otorhinolaryngology, The Second Affiliated Hospital of Nanchang University, Nanchang, Jiangxi 330006, P.R. China
| | - Xiaoyan Tian
- Department of Otorhinolaryngology, The Second Affiliated Hospital of Nanchang University, Nanchang, Jiangxi 330006, P.R. China
| | - Xubo Chen
- Department of Otorhinolaryngology, The Second Affiliated Hospital of Nanchang University, Nanchang, Jiangxi 330006, P.R. China,Correspondence to: Dr Xubo Chen, Department of Otorhinolaryngology, The Second Affiliated Hospital of Nanchang University, 1 Minde Road, Nanchang, Jiangxi 330006, P.R. China
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Yang D, Lu Q, Peng S, Hua J. Ubiquitin C-terminal hydrolase L1 (UCHL1), a double-edged sword in mammalian oocyte maturation and spermatogenesis. Cell Prolif 2022; 56:e13347. [PMID: 36218038 PMCID: PMC9890544 DOI: 10.1111/cpr.13347] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/28/2022] [Revised: 09/14/2022] [Accepted: 09/29/2022] [Indexed: 02/04/2023] Open
Abstract
BACKGROUND Recent studies have shown that ubiquitin-mediated cell apoptosis can modulate protein interaction and involve in the progress of oocyte maturation and spermatogenesis. As one of the key regulators involved in ubiquitin signal, ubiquitin C-terminal hydrolase L1 (UCHL1) is considered a molecular marker associated with spermatogonia stem cells. However, the function of UCHL1 was wildly reported to regulate various bioecological processes, such as Parkinson's disease, lung cancer, breast cancer and colon cancer, how UCHL1 affects the mammalian reproductive system remains an open question. METHODS We identified papers through electronic searches of PubMed database from inception to July 2022. RESULTS Here, we summarize the important function of UCHL1 in controlling mammalian oocyte development, regulating spermatogenesis and inhibiting polyspermy, and we posit the balance of UCHL1 was essential to maintaining reproductive cellular and tissue homeostasis. CONCLUSION This study considers the 'double-edged sword' role of UCHL1 during gametogenesis and presents new insights into UCHL1 in germ cells.
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Affiliation(s)
- Donghui Yang
- College of Veterinary Medicine, Shaanxi Centre of Stem Cells Engineering & TechnologyNorthwest A&F UniversityYanglingShaanxiChina
| | - Qizhong Lu
- State Key Laboratory of Biotherapy and Cancer Center, Research Unit of Gene and Immunotherapy, Collaborative Innovation Center of Biotherapy, West China HospitalSichuan UniversityChengduChina
| | - Sha Peng
- College of Veterinary Medicine, Shaanxi Centre of Stem Cells Engineering & TechnologyNorthwest A&F UniversityYanglingShaanxiChina
| | - Jinlian Hua
- College of Veterinary Medicine, Shaanxi Centre of Stem Cells Engineering & TechnologyNorthwest A&F UniversityYanglingShaanxiChina
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Zhao C, Tang J, Li X, Yan Z, Zhao L, Lang W, Yuan C, Zhou C. Beneficial effects of procyanidin B2 on adriamycin-induced nephrotic syndrome mice: the multi-action mechanism for ameliorating glomerular permselectivity injury. Food Funct 2022; 13:8436-8464. [PMID: 35861207 DOI: 10.1039/d1fo03616e] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Despite considerable advances in prevention, diagnosis, and therapy, nephrotic syndrome (NS) remains a significant cause of high morbidity and mortality globally. As a result, there is an urgent need to identify novel effective preventative and therapeutic agents for NS. NS is implicated in glomerular permselectivity injury, which can be attributed to oxidative distress, inflammation, lipid nephrotoxicity, podocyte apoptosis, autophagy dysfunction, and slit diaphragm (SLD) dysfunction. In addition to its well-documented antioxidant potency, procyanidin B2 (PB2) may exhibit pleiotropic effects by targeting various canonical signaling events, such as NF-κB, PPARs, PI3K/Akt, mTOR, and the caspase family. As a result, PB2 may be a promising therapeutic target against NS. To test this hypothesis, we established an Adriamycin (ADR)-induced NS mouse model to evaluate the pleiotropic renoprotective effects of PB2 on NS. Here, we demonstrated that PB2 improves podocyte injury via inhibition of NOX4/ROS and Hsp90/NF-κB to exhibit antioxidant and anti-inflammatory potency, respectively. We also show that PB2 indirectly activates the PI3K/Akt axis by regulating SLD protein levels, resulting in normalized podocyte apoptosis and autophagy function. Further, loss of albumin (ALB) induces lipid nephrotoxicity, which we found to be alleviated by PB2 via activation of PPARα/β-mediated lipid homeostasis and the cholesterol efflux axis. Interestingly, our results also suggested that PB2 reduces electrolyte abnormalities and edema. In addition, PB2 may contribute protective effects against trace element dys-homeostasis, which, through alleviating serum ALB loss, leads to a protective effect on glomerular permselectivity injury. Taken together, our results reveal that the identified mechanisms of PB2 on NS are multifactorial and involve inhibition of oxidative distress and inflammatory responses, as well as improvements in podocyte apoptosis and autophagy dysfunction, amelioration of lipid nephrotoxicity, and modulation of electrolyte abnormalities and edema. Thus, we provide a theoretical basis for the clinical application of PB2 against NS.
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Affiliation(s)
- Chuanping Zhao
- Key Laboratory of Pharmaceutical Quality Control of Hebei Province, College of Pharmaceutical Sciences, Institute of Life Science and Green Development, Hebei University, 180 WuSi Road, Lianchi District, Baoding, 071002, China.
| | - Jiamei Tang
- Key Laboratory of Pharmaceutical Quality Control of Hebei Province, College of Pharmaceutical Sciences, Institute of Life Science and Green Development, Hebei University, 180 WuSi Road, Lianchi District, Baoding, 071002, China.
| | - Xiaoya Li
- Key Laboratory of Pharmaceutical Quality Control of Hebei Province, College of Pharmaceutical Sciences, Institute of Life Science and Green Development, Hebei University, 180 WuSi Road, Lianchi District, Baoding, 071002, China.
| | - Zihan Yan
- Key Laboratory of Pharmaceutical Quality Control of Hebei Province, College of Pharmaceutical Sciences, Institute of Life Science and Green Development, Hebei University, 180 WuSi Road, Lianchi District, Baoding, 071002, China.
| | - Liangliang Zhao
- Department of Monitoring and Analysis, Baoding Environmental Monitoring Center of Hebei Province, 224 Dongfeng Road, Lianchi District, Baoding, 071000, China
| | - Wenbo Lang
- Department of Monitoring and Analysis, Baoding Environmental Monitoring Center of Hebei Province, 224 Dongfeng Road, Lianchi District, Baoding, 071000, China
| | - Chunmao Yuan
- State Key Laboratory of Functions and Applications of Medicinal Plants, Guizhou Medical University, Guiyang 550014, China
| | - Chengyan Zhou
- Key Laboratory of Pharmaceutical Quality Control of Hebei Province, College of Pharmaceutical Sciences, Institute of Life Science and Green Development, Hebei University, 180 WuSi Road, Lianchi District, Baoding, 071002, China.
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Mechanism of progression of diabetic kidney disease mediated by podocyte mitochondrial injury. Mol Biol Rep 2020; 47:8023-8035. [PMID: 32918716 DOI: 10.1007/s11033-020-05749-0] [Citation(s) in RCA: 14] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/30/2020] [Accepted: 08/28/2020] [Indexed: 12/21/2022]
Abstract
Diabetic kidney disease (DKD) is an important diabetic microvascular complication, which has become the main cause of end-stage renal disease (ESRD) all over the world. It is of great significance to find effective therapeutic targets and improve the prognosis of the disease. Traditionally, it is believed that the activation of the renin-angiotensin-aldosterone system (RAAS) is the main reason for the progression of DKD, but with the progress of research, it is known that the production of proteinuria in patients with DKD is also related to podocyte injury and loss. Many studies have shown that mitochondrial dysfunction in podocytes plays an important role in the occurrence and development of DKD, and oxidative stress is also the main pathway and common hub of diabetes to the occurrence and development of microvascular and macrovascular complications. Thus, the occurrence and progression of DKD is correlated with not only the activation of the RAAS, but also the damage of mitochondria, oxidative stress, and inflammatory mediators. Besides, diabetes-related metabolic disorders can also cause abnormalities in mitochondrial dynamics, autophagy and cellular signal transduction, which are intertwined in a complex way. Therefore, in this review, we mainly explore the mechanism and the latest research progress of podocyte mitochondria in DKD and summarize the main signal pathways involved in them. Thus, it provides feasible clinical application and future research suggestions for the prevention and treatment of DKD, which has important practical significance for the later treatment of patients with DKD.
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Fang Y, Li F, Qi C, Mao X, Xu Y, Zhao Z, Wu H, Zhang Z. Plakoglobin is involved in cytoskeletal rearrangement of podocytes under the regulation of UCH-L1. Biochem Biophys Res Commun 2020; 529:112-118. [PMID: 32560811 DOI: 10.1016/j.bbrc.2020.05.093] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/10/2020] [Accepted: 05/14/2020] [Indexed: 11/25/2022]
Abstract
UCH-L1 is a de-ubiquitination enzyme comprehensively distributed in neural cells and podocytes, which is involved in several kinds of nervous system and kidney related diseases. Our previous studies have demonstrated the aberrant up-regulation of UCH-L1 in podocytes of renal diseases, but how dose podocytes are injured by up-regulated UCH-L1 is waiting to be elucidated. Here, we observed the cytoskeleton rearrangement in podocytes with over-expression of UCH-L1, accompanied with a down-regulation of synaptopodin and RhoA, which are closely related to cytoskeletal stabilization. However, we did not see any alteration of RhoA ubiquitination level under the stimulation of UCH-L1 in podocytes. Subsequently, mass spectrum was applied in UCH-L1-flag immunoprecipitation and plakoglobin was screened out, which was among the UCH-L1-combined proteins and most likely related to cytoskeleton rearrangement. Our experiment demonstrates UCH-L1 may not injure podocytes cytoskeleton through a direct regulation on RhoA/Synaptopodin, but through the regulation of plakoglobin, which could be a promising target for treatment of renal disease in the future.
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Affiliation(s)
- Yili Fang
- Department of Pathology, Shanghai Medical College, Fudan University, Shanghai, 200032, PR China
| | - Fang Li
- Department of Pathology, Shanghai Medical College, Fudan University, Shanghai, 200032, PR China
| | - Chenyang Qi
- Department of Pathology, Shanghai Medical College, Fudan University, Shanghai, 200032, PR China
| | - Xing Mao
- Department of Pathology, Shanghai Medical College, Fudan University, Shanghai, 200032, PR China
| | - Yuyin Xu
- Department of Pathology, Shanghai Medical College, Fudan University, Shanghai, 200032, PR China
| | - Zhonghua Zhao
- Department of Pathology, Shanghai Medical College, Fudan University, Shanghai, 200032, PR China
| | - Huijuan Wu
- Department of Pathology, Shanghai Medical College, Fudan University, Shanghai, 200032, PR China.
| | - Zhigang Zhang
- Department of Pathology, Shanghai Medical College, Fudan University, Shanghai, 200032, PR China.
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Matuszczak E, Tylicka M, Komarowska MD, Debek W, Hermanowicz A. Ubiquitin carboxy-terminal hydrolase L1 - physiology and pathology. Cell Biochem Funct 2020; 38:533-540. [PMID: 32207552 DOI: 10.1002/cbf.3527] [Citation(s) in RCA: 24] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/21/2019] [Revised: 02/20/2020] [Accepted: 03/11/2020] [Indexed: 12/12/2022]
Abstract
Ubiquitin C-terminal hydrolase 1 (UCHL1) is an enzyme unique for its multiple activity - both ligase and hydrolase. UCHL1 was first identified as an abundant protein found in the brain and testes, however its expression is not limited to the neuronal compartment. UCHL1 is also highly expressed in carcinomas of various tissue origins, including those from brain, lung, breast, kidney, colon, prostate, pancreas and mesenchymal tissues. Loss-of-function studies and an inhibitor for UCHL1 confirmed the importance of UCHL1 for cancer therapy. So far biological significance of UCHL1 was described in the following processes: spermatogenesis, oncogenesis, angiogenesis, cell proliferation and differentiation in skeletal muscle, inflammation, tissue injury, neuronal injury and neurodegeneration.
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Affiliation(s)
- Ewa Matuszczak
- Pediatric Surgery Department, Medical University of Bialystok, Bialystok, Poland
| | - Marzena Tylicka
- Biophysics Department, Medical University of Bialystok, Bialystok, Poland
| | | | - Wojciech Debek
- Pediatric Surgery Department, Medical University of Bialystok, Bialystok, Poland
| | - Adam Hermanowicz
- Pediatric Surgery Department, Medical University of Bialystok, Bialystok, Poland
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Abstract
PURPOSE OF REVIEW Lupus nephritis (LN) is a serious manifestation of systemic lupus erythematosus and is characterized by proteinuria and renal failure. Proteinuria is a marker of poor prognosis and is attributed to podocyte loss and dysfunction. It is often debated whether these cells are innocent bystanders or active participants in the pathogenesis of glomerulonephritis. RECENT FINDINGS Podocytes share many elements of the innate and adaptive immune system. Specifically, they produce and express complement components and receptors which when dysregulated appear to contribute to podocyte damage and LN. In parallel, podocytes express major histocompatibility complex and co-stimulatory molecules which may be involved in local immune events. Podocyte-specific cytotoxic cells and possibly other immune cells contribute to glomerular damage. Autoantibodies present in lupus sera enter podocytes to upregulate calcium/calmodulin kinase which in turn compromises their structure and function. SUMMARY More recent studies point to the restoration of podocyte function using cell targeted approaches to prevent and treat LN. These strategies along with podocyte involvement in the pathogenesis of LN will be addressed in this review.
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Sun L, Zou LX, Han YC, Zhu DD, Chen T, Wang J. Role of A20/TNFAIP3 deficiency in lupus nephritis in MRL/lpr mice. Clin Exp Nephrol 2019; 24:107-118. [PMID: 31811410 DOI: 10.1007/s10157-019-01826-2] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/28/2018] [Accepted: 11/20/2019] [Indexed: 10/25/2022]
Abstract
BACKGROUND The activation of the nuclear factor-κB (NF-κB) signaling pathway gives rise to inflammation in the pathogenesis of lupus nephritis (LN), with A20 serving as a negative feedback regulator and ubiquitin C‑terminal hydrolase L1 (UCH-L1) acting as a downstream target protein. However, their roles in the mechanism of LN remain undetermined. METHODS In the present study, the expression of A20 and UCH-L1, the activity of NF-κB and ubiquitin-proteasome system (UPS) were measured in MRL/lpr mice and A20 gene silenced podocytes. The severity of podocyte injury and immune complex deposits were detected by transmission electron microscopy. RESULTS The in vivo experiments revealed that A20 failed to terminate the activation of NF-κB, which was accompanied by UCH-L1 overexpression, ubiquitin accumulation, and glomerular injury in LN mice. Immunosuppression therapy did improve LN progression by attenuating A20 deficiency. In vitro experiments confirmed that tumor necrosis factor-α induced NF-κB activation, which led to UCH-L1 overexpression, UPS impairment, the upregulation of desmin and the downregulation of synaptopodin in A20 gene silenced podocytes. CONCLUSION Thus, the results of the present study suggest that A20 regulates UCH-L1 expression via the NF-κB signaling pathway and A20 deficiency might play an important role in LN pathogenesis. Therefore, the A20 protein may serve as a promising therapeutic target for LN.
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Affiliation(s)
- Ling Sun
- Department of Nephrology, Xuzhou Central Hospital, Medical College of Southeast University, Xuzhou, Jiangsu, People's Republic of China.
| | - Lu-Xi Zou
- Zhejiang University, Hangzhou, Zhejiang, People's Republic of China.
| | - Yu-Chen Han
- Institute of Nephrology, Zhongda Hospital, Medical College of Southeast University, Jiangsu, People's Republic of China
| | - Dong-Dong Zhu
- Institute of Nephrology, Zhongda Hospital, Medical College of Southeast University, Jiangsu, People's Republic of China
| | - Ting Chen
- Department of Nephrology, Xuzhou Central Hospital, Medical College of Southeast University, Xuzhou, Jiangsu, People's Republic of China
| | - Jie Wang
- Department of Pathology, Xuzhou Central Hospital, Medical College of Southeast University, Xuzhou, Jiangsu, People's Republic of China
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Tian L, Wang K, Liu H, Li K, Lin B, Fang Z, Han J, Li N, Yang H, Bian L, Liu X, Xi Z. UCH-L1 mitigates neurotoxicity induced by ZnO particles via stabilizing the inhibitor of NF-kappa B signaling, IκB-α. ECOTOXICOLOGY AND ENVIRONMENTAL SAFETY 2019; 180:259-268. [PMID: 31096129 DOI: 10.1016/j.ecoenv.2019.03.058] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/17/2018] [Revised: 03/07/2019] [Accepted: 03/14/2019] [Indexed: 06/09/2023]
Abstract
Our study determined the toxic effects of zinc oxide (ZnO) particles with different diameters on dopaminergic (DA) neurons, the role of ubiquitin C-terminal hydrolase L1 (UCH-L1) for ZnO particles-induced neurotoxicity, and corresponding molecular mechanisms. We constructed an in vitro cell injury model for DA neurons to analyze the cytotoxicity of ZnO particles using SH-SY5Y cells. Following cell viability assays and flow cytometry, we found that the cytotoxicity of ZnO particles was affected by particle size, time, and dose of exposure. For example, the toxicity of ZnO particles with 50 nm or 100 nm diameter was stronger than that of ZnO particles with 1000 nm diameter. Furthermore, ZnO particles exposure resulted in a significant decrease in UCH-L1 expression in SH-SY5Y; whereas UCH-L1 overexpression led to a significant increase in cell viability and a sharp decrease in ROS level. Western blotting and adenovirus transfection found that exposure to ZnO particles with different diameters all activate the NF-κB signaling in SH-SY5Y cells; whereas UCH-L1 over-expression resulted in increased levels of IκBα, an endogenous inhibitor of NF-κB signaling pathway. ZnO particles with different diameters all induced cytotoxicity in DA neurons, which may be related to the free Zn2+ in the suspension. Regarding the neurotoxic effect of ZnO particles, UCH-L1 protects against and/or alleviates neuronal damage, possibly by deubiquitination of the endogenous inhibitor, IκBα, which leads to activation of NF-κB signaling. Therefore, one possible mechanism for ZnO particle-induced neurotoxicity may be mediated via the down-regulation of UCH-L1 expression in DA cells.
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Affiliation(s)
- Lei Tian
- Tianjin Institute of Environmental and Operational Medicine, No. 1 Dali Road, Heping District, Tianjin, 300050, China.
| | - Kun Wang
- Tianjin Institute of Environmental and Operational Medicine, No. 1 Dali Road, Heping District, Tianjin, 300050, China.
| | - Huanliang Liu
- Tianjin Institute of Environmental and Operational Medicine, No. 1 Dali Road, Heping District, Tianjin, 300050, China.
| | - Kang Li
- Tianjin Institute of Environmental and Operational Medicine, No. 1 Dali Road, Heping District, Tianjin, 300050, China.
| | - Bencheng Lin
- Tianjin Institute of Environmental and Operational Medicine, No. 1 Dali Road, Heping District, Tianjin, 300050, China.
| | - Zhen Fang
- Tianjin Institute of Environmental and Operational Medicine, No. 1 Dali Road, Heping District, Tianjin, 300050, China; Binzhou Medical College, Yantai 264000, China.
| | - Jie Han
- Tianjin Institute of Environmental and Operational Medicine, No. 1 Dali Road, Heping District, Tianjin, 300050, China; Tianjin University of Sport, No.16 Donghai Road, Jinghai District, Tianjin, 301617, China.
| | - Ning Li
- Tianjin Institute of Environmental and Operational Medicine, No. 1 Dali Road, Heping District, Tianjin, 300050, China; Binzhou Medical College, Yantai 264000, China.
| | - Hu Yang
- Tianjin Institute of Environmental and Operational Medicine, No. 1 Dali Road, Heping District, Tianjin, 300050, China; The Affiliated Zhongshan Hospital of Dalian University, Dalian, 116001, China.
| | - Liping Bian
- Tianjin Institute of Environmental and Operational Medicine, No. 1 Dali Road, Heping District, Tianjin, 300050, China.
| | - Xiaohua Liu
- Tianjin Institute of Environmental and Operational Medicine, No. 1 Dali Road, Heping District, Tianjin, 300050, China; Tianjin University of Sport, No.16 Donghai Road, Jinghai District, Tianjin, 301617, China.
| | - Zhuge Xi
- Tianjin Institute of Environmental and Operational Medicine, No. 1 Dali Road, Heping District, Tianjin, 300050, China.
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Sun L, Zou LX, Han YC, Wu L, Chen T, Zhu DD, Hu P. A20 overexpression exerts protective effects on podocyte injury in lupus nephritis by downregulating UCH-L1. J Cell Physiol 2019; 234:16191-16204. [PMID: 30805933 DOI: 10.1002/jcp.28282] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/06/2018] [Revised: 11/23/2018] [Accepted: 11/30/2018] [Indexed: 01/24/2023]
Abstract
Lupus nephritis (LN), an autoimmune kidney disease caused by systemic lupus erythematosus (SLE), is the inflammation of the kidney. Although the treatment of LN is still a therapeutic challenge for many practitioners, the present study aims to provide a new insight for the treatment and management. The study aims to explore the effect of A20 on LN in relation to the nuclear factor-kappa B (NF-κB) signaling pathway. MRL/lpr mice were used as the LN mouse model. Next, A20, UCH-L1, and NF-κB expression in LN patients and MRL/lpr mice was determined. A20 was upregulated in podocytes to assess biological functions of A20 in LN. Furthermore, to further investigate the pivotal role of the NF-κB pathway in LN, the NF-κB pathway was blocked in podocytes. Next, UCH-L1 was downregulated in MRL/lpr mice to assess biological functions of UCH-L1 in LN. A20 was downregulated, whereas UCH-L1 was upregulated in LN. Overexpressed A20 declined NF-κB, UCH-L1 expression, and the extent of p65 phosphorylation. A20 overexpression or UCH-L1 inhibition increased expression of synaptoporin and nephrin but decreased desmin expression and ubiquitin accumulation level in podocytes. Moreover, A20 overexpression or UCH-L1 inhibition increased the podocyte number but decreased protein level of cleaved caspase-3, podocyte lesion improvement, decreased foot process width, glomerulus basement membrane, and foot process fusion rate. In addition, urine protein, blood urea nitrogen, serum creatinine, and ds-DNA antibody levels decreased with elevated A20 or depleted UCH-L1. Collectively, it could be concluded that A20 protects against podocyte injury in LN via UCH-L1 by inactivating the NF-κB signaling pathway.
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Affiliation(s)
- Ling Sun
- Department of Nephrology, Xuzhou Central Hospital, Medical College of Southeast University, Xuzhou, Jiangsu, China
| | - Lu-Xi Zou
- School of Management, Zhejiang University, Hangzhou, China
| | - Yu-Chen Han
- Institute of Nephrology, Zhongda Hospital, Southeast University, China
| | - Ling Wu
- Department of Nephrology, Xuzhou Central Hospital, Medical College of Southeast University, Xuzhou, Jiangsu, China
| | - Ting Chen
- Department of Nephrology, Xuzhou Central Hospital, Medical College of Southeast University, Xuzhou, Jiangsu, China
| | - Dong-Dong Zhu
- Institute of Nephrology, Zhongda Hospital, Southeast University, China
| | - Po Hu
- Department of Nephrology, Xuzhou Central Hospital, Medical College of Southeast University, Xuzhou, Jiangsu, China
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13
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Abstract
The global burden of chronic kidney disease will increase during the next century. As NFκB, first described more than 30 years ago, plays a major role in immune and non-immune-mediated diseases and in inflammatory and metabolic disorders, this review article summarizes current knowledge on the role of NFκB in in vivo kidney injury and describes the new and so far not completely understood crosstalk between canonical and non-canonical NFκB pathways in T-lymphocyte activation in renal disease.
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Affiliation(s)
- Ning Song
- III. Department of Medicine, University Medical Center Hamburg-Eppendorf, Hamburg, Germany.,Department of Critical Care Medicine, The First Affiliated Hospital of Harbin Medical University, Harbin, China
| | - Friedrich Thaiss
- III. Department of Medicine, University Medical Center Hamburg-Eppendorf, Hamburg, Germany
| | - Linlin Guo
- III. Department of Medicine, University Medical Center Hamburg-Eppendorf, Hamburg, Germany
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14
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Guo Q, Zhong W, Duan A, Sun G, Cui W, Zhuang X, Liu L. Protective or deleterious role of Wnt/beta-catenin signaling in diabetic nephropathy: An unresolved issue. Pharmacol Res 2019; 144:151-157. [PMID: 30935943 DOI: 10.1016/j.phrs.2019.03.022] [Citation(s) in RCA: 26] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/09/2019] [Revised: 02/26/2019] [Accepted: 03/25/2019] [Indexed: 12/16/2022]
Abstract
In recent years, the Wnt/β-catenin signaling has gained tremendous attention due to its ability to modulate a number of diseases including diabetic nephropathy. Studies have shown that there is decrease in the secretion of Wnt proteins including Wnt4, 5a and Wnt 6 during high glucose concentration or diabetic conditions, which leads to decreased translocation of β-catenin to nucleus. The down-regulation of Wnt/β-catenin signaling leads to detrimental effects on kidney including increased apoptosis of mesangial cells and increased deposition of fibrous tissue in mesangium. The pharmacological modulators such as spironolactone, NO donor and antioxidant are shown to produce beneficial effects in diabetic nephropathy by up regulating the expression of Wnt proteins and activation of diabetes-induced suppressed Wnt/β-catenin signaling. On the other hand, it is documented that diabetes leads to overactivation of Wnt1/β-catenin signaling, which promotes podocyte injury, induce epithelial-mesenchymal transition of podocytes along with renal injury and fibrosis. Accordingly, different interventions aimed to suppress overactivated Wnt/β-catenin signaling are reported to improve the condition and symptoms associated with diabetic nephropathy. The present review discusses the dual role of Wnt/beta-catenin signaling in the pathogenesis of diabetic nephropathy.
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Affiliation(s)
- Qiaoyan Guo
- Department of Nephrology, The Second Hospital of Jilin University, Changchun, 130041, China.
| | - Wei Zhong
- Department of Ophthalmology, The China-Japan Union Hospital of Jilin University, Changchun, 130033, China.
| | - Aosong Duan
- Department of Intensive Care Unit, The First Hospital of Jilin University, Changchun, 130021,China.
| | - Guanggong Sun
- Department of Nephrology, The Second Hospital of Jilin University, Changchun, 130041, China.
| | - Wenpeng Cui
- Department of Nephrology, The Second Hospital of Jilin University, Changchun, 130041, China.
| | - Xiaohua Zhuang
- Department of Nephrology, The Second Hospital of Jilin University, Changchun, 130041, China.
| | - Lihua Liu
- Department of Nephrology, The Second Hospital of Jilin University, Changchun, 130041, China.
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15
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Fang Y, Shen X. Ubiquitin carboxyl-terminal hydrolases: involvement in cancer progression and clinical implications. Cancer Metastasis Rev 2018; 36:669-682. [PMID: 29080080 DOI: 10.1007/s10555-017-9702-0] [Citation(s) in RCA: 55] [Impact Index Per Article: 9.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Abstract
Protein ubiquitination and deubiquitination participate in a number of biological processes, including cell growth, differentiation, transcriptional regulation, and oncogenesis. Ubiquitin C-terminal hydrolases (UCHs), a subfamily of deubiquitinating enzymes (DUBs), includes four members: UCH-L1/PGP9.5 (protein gene product 9.5), UCH-L3, UCHL5/UCH37, and BRCA1-associated protein-1 (BAP1). Recently, more attention has been paid to the relationship between the UCH family and malignancies, which play different roles in the progression of different tumors. It remains controversial whether UCHL1 is a tumor promoter or suppressor. UCHL3 and UCH37 are considered to be tumor promoters, while BAP1 is considered to be a tumor suppressor. Studies have showed that UCH enzymes influence several signaling pathways that play crucial roles in oncogenesis, tumor invasion, and migration. In addition, UCH families are associated with tumor cell sensitivity to therapeutic modalities. Here, we reviewed the roles of UCH enzymes in the development of tumors, highlighting the potential consideration of UCH enzymes as new interesting targets for the development of anticancer drugs.
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Affiliation(s)
- Ying Fang
- The Department of Gastroenterology of Zhongshan Hospital, Fudan University, 180 Fenglin Rd, Shanghai, 200032, People's Republic of China
| | - Xizhong Shen
- The Department of Gastroenterology of Zhongshan Hospital, Fudan University, 180 Fenglin Rd, Shanghai, 200032, People's Republic of China. .,Key Laboratory of Medical Molecule Virology, Ministry of Education and Health, Shanghai Institute of Liver Diseases Fudan University, Shanghai, 200032, People's Republic of China.
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16
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Zhen-wu-tang protects against podocyte injury in rats with IgA nephropathy via PPARγ/NF-κB pathway. Biomed Pharmacother 2018. [PMID: 29518610 DOI: 10.1016/j.biopha.2018.02.127] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022] Open
Abstract
Zhen-wu-tang (ZWT) has been widely applied in chronic kidney diseases. However, the mechanism of ZWT remains unclear. Peroxisome proliferator-activated receptors-γ (PPARγ) is known as a protective factor for podocyte and kidney function. This study is aimed to investigate the protective effects of ZWT on IgA nephropathy (IgAN) in rats against podocyte injury and the underlying mechanism related to PPARγ. IgAN model rats were induced by administering bovine serum albumin, lipopolysaccharide, and carbon tetrachloride. ZWT at two doses and GW9662 (PPARγ antagonist) was administered once daily for 4 weeks respectively. Cultured podocyte induced by LPS were used to evaluate the podocyte-protective effect and related mechanism of ZWT in vitro. Results showed that ZWT observably reduced proteinuria and hematuria excretion, as well as the levels of blood urea nitrogen, serum creatinine, serum uric acid, low-density lipoprotein cholesterol, total cholesterol and triglycerides, but increased the contents of high-density lipoprotein cholesterol, ameliorating renal function and hyperlipidemia state in IgAN rats. Besides, both ZWT administration groups alleviated kidney pathological lesion, macrophage infiltration, IgA and C3 deposition in glomeruli. To further demonstrate the protective effects of ZWT, we found that podocyte damage was markedly ameliorated with ZWT treatments in IgAN rats and LPS-induced podocyte injury model by suppressing the expressions of desmin, reducing podocyte apoptosis and augmenting nephrin and podocin levels. Moreover, ZWT inhibited the phosphorylation of NF-κB and IκBα, simultaneously upregulated PPARγ. However, GW9662 made no difference in all the above effects compared to the model group, and was reversed by ZWT in vitro study. In conclusion, these results demonstrated that ZWT ameliorated IgAN-induced podocyte injury via upregulation PPARγ and the underlying mechanism might involve the inhibition of NF-κB pathway.
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17
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Korte EA, Caster DJ, Barati MT, Tan M, Zheng S, Berthier CC, Brosius FC, Vieyra MB, Sheehan RM, Kosiewicz M, Wysoczynski M, Gaffney PM, Salant DJ, McLeish KR, Powell DW. ABIN1 Determines Severity of Glomerulonephritis via Activation of Intrinsic Glomerular Inflammation. THE AMERICAN JOURNAL OF PATHOLOGY 2017; 187:2799-2810. [PMID: 28935578 PMCID: PMC5718094 DOI: 10.1016/j.ajpath.2017.08.018] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/21/2017] [Revised: 07/15/2017] [Accepted: 08/17/2017] [Indexed: 10/24/2022]
Abstract
Transcription factor NF-κB regulates expression of numerous genes that control inflammation and is activated in glomerular cells in glomerulonephritis (GN). We previously identified genetic variants for a NF-κB regulatory, ubiquitin-binding protein ABIN1 as risk factors for GN in systemic autoimmunity. The goal was to define glomerular inflammatory events controlled by ABIN1 function in GN. Nephrotoxic serum nephritis was induced in wild-type (WT) and ubiquitin-binding deficient ABIN1[D485N] mice, and renal pathophysiology and glomerular inflammatory phenotypes were assessed. Proteinuria was also measured in ABIN1[D485N] mice transplanted with WT mouse bone marrow. Inflammatory activation of ABIN1[D472N] (D485N homolog) cultured human-derived podocytes, and interaction with primary human neutrophils were also assessed. Disruption of ABIN1 function exacerbated proteinuria, podocyte injury, glomerular NF-κB activity, glomerular expression of inflammatory mediators, and glomerular recruitment and retention of neutrophils in antibody-mediated nephritis. Transplantation of WT bone marrow did not prevent the increased proteinuria in ABIN1[D845N] mice. Tumor necrosis factor-stimulated enhanced expression and secretion of NF-κB-targeted proinflammatory mediators in ABIN1[D472N] cultured podocytes compared with WT cells. Supernatants from ABIN1[D472N] podocytes accelerated chemotaxis of human neutrophils, and ABIN1[D472N] podocytes displayed a greater susceptibility to injurious morphologic findings induced by neutrophil granule contents. These studies define a novel role for ABIN1 dysfunction and NF-κB in mediating GN through proinflammatory activation of podocytes.
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Affiliation(s)
- Erik A Korte
- Department of Medicine University of Louisville, Louisville, Kentucky
| | - Dawn J Caster
- Department of Medicine University of Louisville, Louisville, Kentucky; Robley Rex VA Medical Center, Louisville, Kentucky
| | - Michelle T Barati
- Department of Medicine University of Louisville, Louisville, Kentucky
| | - Min Tan
- Department of Medicine University of Louisville, Louisville, Kentucky
| | - Shirong Zheng
- Department of Medicine University of Louisville, Louisville, Kentucky
| | - Celine C Berthier
- Department of Internal Medicine-Nephrology, University of Michigan, Ann Arbor, Michigan
| | - Frank C Brosius
- Department of Internal Medicine-Nephrology, University of Michigan, Ann Arbor, Michigan
| | - Mark B Vieyra
- Department of Medicine University of Louisville, Louisville, Kentucky
| | - Ryan M Sheehan
- Department of Medicine University of Louisville, Louisville, Kentucky
| | - Michele Kosiewicz
- Department of Microbiology and Immunology, University of Louisville, Louisville, Kentucky
| | | | - Patrick M Gaffney
- Arthritis and Clinical Immunology Program and Clinical Pharmacology Research Program, Oklahoma Medical Research Foundation, Oklahoma City, Oklahoma
| | - David J Salant
- Department of Medicine, Boston University School of Medicine, Boston, Massachusetts
| | - Kenneth R McLeish
- Department of Medicine University of Louisville, Louisville, Kentucky; Department of Internal Medicine-Nephrology, University of Michigan, Ann Arbor, Michigan
| | - David W Powell
- Department of Medicine University of Louisville, Louisville, Kentucky.
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18
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Matuszczak E, Tylicka M, Dębek W, Sankiewicz A, Gorodkiewicz E, Hermanowicz A. Overexpression of ubiquitin carboxyl-terminal hydrolase L1 (UCHL1) in serum of children after thermal injury. Adv Med Sci 2017; 62:83-86. [PMID: 28193576 DOI: 10.1016/j.advms.2016.07.004] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/18/2015] [Revised: 06/21/2016] [Accepted: 07/26/2016] [Indexed: 02/04/2023]
Abstract
PURPOSE The study aims to determinate concentrations of ubiquitin C-terminal hydrolase 1 (UCHL1), which hydrolyzes amino acids from ubiquitin and cleave di-ubiquitins, in serum of children after thermal injury. PATIENTS/METHODS 42 children scalded by hot water, managed at the Department of Pediatric Surgery, with burns in 4-20% TBSA were included into the study (age 9 months up to 14 years, mean age 2.5±1 years). Blood plasma UCHL1 concentration was assessed in 2-6h, 12-16h, 3d, 5d, and 7d after injury using surface plasmon resonance imaging biosensor. 18 healthy subjects admitted for planned surgeries served as controls. RESULTS The UCHL1 concentration in the blood plasma of patients with thermal injuries reached its peak 12-16h after thermal injury and slowly decreased over time, and still did not reach the normal range on the 7th day after thermal injury. Mean concentrations of UCHL1 after thermal injury were above the range measured in controls (0.12ng/ml): 2-6h after injury - 5.59ng/dl, 12-16h after injury - 9.16ng/dl, 3 days after injury - 6.94ng/dl, 5 days after 5.41ng/dl, 7 days after injury - 4.09ng/dl. CONCLUSIONS We observed sudden increase in the concentration of UCHL1 2-16h after thermal injury with the slow decrease in the UCHL1 concentration over the time. UCHL1 concentration was proportional to the severity of the burn. Further studies are needed to determine the mechanisms by which UCHL1 contributes to metabolic response following thermal injury.
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Affiliation(s)
- Ewa Matuszczak
- Department of Pediatric Surgery, Medical University of Bialystok, Bialystok, Poland.
| | - Marzena Tylicka
- Department of Biophysics, Medical University of Bialystok, Bialystok, Poland
| | - Wojciech Dębek
- Department of Pediatric Surgery, Medical University of Bialystok, Bialystok, Poland
| | - Anna Sankiewicz
- Department of Electrochemistry, Institute of Chemistry, University of Bialystok, Bialystok, Poland
| | - Ewa Gorodkiewicz
- Department of Electrochemistry, Institute of Chemistry, University of Bialystok, Bialystok, Poland
| | - Adam Hermanowicz
- Department of Pediatric Surgery, Medical University of Bialystok, Bialystok, Poland
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19
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Matuszczak E, Tylicka M, Dębek W, Tokarzewicz A, Gorodkiewicz E, Hermanowicz A. Concentration of UHCL1 in the Serum of Children with Acute Appendicitis, Before and After Surgery, and Its Correlation with CRP and Prealbumin. J INVEST SURG 2017. [PMID: 28635516 DOI: 10.1080/08941939.2017.1282559] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
Affiliation(s)
- Ewa Matuszczak
- Pediatric Surgery Department, Medical University of Bialystok, Poland
| | - Marzena Tylicka
- Biophysics Department, Medical University of Bialystok, Poland
| | - Wojciech Dębek
- Pediatric Surgery Department, Medical University of Bialystok, Poland
| | | | | | - Adam Hermanowicz
- Pediatric Surgery Department, Medical University of Bialystok, Poland
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20
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Cui JH, Xie X. UCH-L1 Expressed by Podocytes: a Potentially Therapeutic Target for Lupus Nephritis? Inflammation 2017; 40:657-665. [DOI: 10.1007/s10753-017-0512-x] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/04/2023]
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21
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Dai H, Liu Q, Liu B. Research Progress on Mechanism of Podocyte Depletion in Diabetic Nephropathy. J Diabetes Res 2017; 2017:2615286. [PMID: 28791309 PMCID: PMC5534294 DOI: 10.1155/2017/2615286] [Citation(s) in RCA: 176] [Impact Index Per Article: 25.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/23/2016] [Revised: 02/05/2017] [Accepted: 03/05/2017] [Indexed: 12/13/2022] Open
Abstract
Diabetic nephropathy (DN) together with glomerular hyperfiltration has been implicated in the development of diabetic microangiopathy in the initial stage of diabetic diseases. Increased amounts of urinary protein in DN may be associated with functional and morphological alterations of podocyte, mainly including podocyte hypertrophy, epithelial-mesenchymal transdifferentiation (EMT), podocyte detachment, and podocyte apoptosis. Accumulating studies have revealed that disruption in multiple renal signaling pathways had been critical in the progression of these pathological damages, such as adenosine monophosphate-activated kinase signaling pathways (AMPK), wnt/β-catenin signaling pathways, endoplasmic reticulum stress-related signaling pathways, mammalian target of rapamycin (mTOR)/autophagy pathway, and Rho GTPases. In this review, we highlight new molecular insights underlying podocyte injury in the progression of DN, which offer new therapeutic targets to develop important renoprotective treatments for DN over the next decade.
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Affiliation(s)
- Haoran Dai
- Department of Nephrology, Shunyi Branch, Beijing Hospital of Traditional Chinese Medicine, Station East 5, Shunyi District, Beijing 101300, China
| | - Qingquan Liu
- Department of Nephrology, Shunyi Branch, Beijing Hospital of Traditional Chinese Medicine, Station East 5, Shunyi District, Beijing 101300, China
- Beijing Hospital of Traditional Chinese Medicine Affiliated to Capital Medical University, 23 Meishuguanhou Street, Dongcheng District, Beijing 100010, China
- *Qingquan Liu: and
| | - Baoli Liu
- Department of Nephrology, Shunyi Branch, Beijing Hospital of Traditional Chinese Medicine, Station East 5, Shunyi District, Beijing 101300, China
- Beijing Hospital of Traditional Chinese Medicine Affiliated to Capital Medical University, 23 Meishuguanhou Street, Dongcheng District, Beijing 100010, China
- *Baoli Liu:
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22
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Wnt/β-Catenin Signaling Mediated-UCH-L1 Expression in Podocytes of Diabetic Nephropathy. Int J Mol Sci 2016; 17:ijms17091404. [PMID: 27571062 PMCID: PMC5037684 DOI: 10.3390/ijms17091404] [Citation(s) in RCA: 26] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/08/2016] [Revised: 08/07/2016] [Accepted: 08/18/2016] [Indexed: 02/07/2023] Open
Abstract
Increasing studies identified podocyte injury as a key early risk factor resulting in diabetic nephropathy (DN). The ubiquitin carboxy-terminal hydrolase 1 (UCH-L1) participates in podocyte differentiation and injury, which is elevated in the podocytes of a variety of nephritis. Whether UCH-L1 expression is positively related to podocyte injury of DN remains unclear. In this study, elevated expression of UCH-L1 and its intrinsic mechanism in high glucose (HG)-stimulated murine podocytes were investigated using western blot and real-time quantitative PCR. Kidney biopsies of DN patients and health individuals were stained by immunofluorescence (IF) method. The morphological and functional changes of podocytes were tested by F-actin staining and cell migration assay. Results demonstrated that HG induced upregulation of UCH-L1 and activation of the Wnt/β-catenin signaling pathway in podocytes. However, blocking of the Wnt pathway by dickkopf related protein 1 (DKK1) eliminated the above changes. Furthermore, IF staining confirmed that, compared with healthy individuals, the expression of UCH-L1 and β-catenin were obviously increased in kidney biopsy of DN patients. Overexpression of UCH-L1 remodeled its actin cytoskeleton, increased its cell migration and impacted its important proteins. All the findings manifested that Wnt/β-catenin/UCH-L1 may be a new potential therapy method in the treatment of DN in future.
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