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Wei M, Liu J, Wang X, Liu X, Jiang L, Jiang Y, Ma Y, Wang J, Yuan H, An X, Song Y, Zhang L. Multi-omics analysis of kidney tissue metabolome and proteome reveals the protective effect of sheep milk against adenine-induced chronic kidney disease in mice. Food Funct 2024. [PMID: 38864415 DOI: 10.1039/d4fo00619d] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/13/2024]
Abstract
Chronic kidney disease (CKD) is characterized by impaired renal function and is associated with inflammation, oxidative stress, and fibrosis. Sheep milk contains several bioactive molecules with protective effects against inflammation and oxidative stress. In the current study, we investigated the potential renoprotective effects of sheep milk and the associated mechanisms of action in an adenine-induced CKD murine model. Sheep milk delayed renal chronic inflammation (e.g., significant reduction in levels of inflammatory factors Vcam1, Icam1, Il6, and Tnfa), fibrosis (significant reduction in levels of fibrosis factors Col1a1, Fn1, and Tgfb), oxidative stress (significant increase in levels of antioxidants and decrease in oxidative markers), mineral disorders, and renal injury in adenine-treated mice (e.g. reduced levels of kidney injury markers NGAL and KIM-1). The combined proteomics and metabolomics analyses showed that sheep milk may affect the metabolic processes of several compounds, including proteins, lipids, minerals, and hormones in mice with adenine-induced chronic kidney disease. In addition, it may regulate the expression of fibrosis-related factors and inflammatory factors through the JAK1/STAT3/HIF-1α signaling pathway, thus exerting its renoprotective effects. Therefore, sheep milk may be beneficial for patients with CKD and should be evaluated in preclinical and clinical studies.
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Affiliation(s)
- Mengyao Wei
- College of Animal Science and Technology, Northwest A&F University, Yangling, Shannxi 712100, China.
| | - Jiaxin Liu
- College of Animal Science and Technology, Northwest A&F University, Yangling, Shannxi 712100, China.
| | - Xiaofei Wang
- College of Animal Science and Technology, Northwest A&F University, Yangling, Shannxi 712100, China.
| | - Xiaorui Liu
- Division of Laboratory Safety and Services, Northwest A&F University, Yangling, Shaanxi 712100, China
| | - Luyao Jiang
- College of Animal Science and Technology, Northwest A&F University, Yangling, Shannxi 712100, China.
| | - Yue Jiang
- College of Animal Science and Technology, Northwest A&F University, Yangling, Shannxi 712100, China.
| | - Yingtian Ma
- College of Animal Science and Technology, Northwest A&F University, Yangling, Shannxi 712100, China.
| | - Jiangang Wang
- College of Animal Science and Technology, Northwest A&F University, Yangling, Shannxi 712100, China.
| | - Hao Yuan
- College of Animal Science and Technology, Northwest A&F University, Yangling, Shannxi 712100, China.
| | - Xiaopeng An
- College of Animal Science and Technology, Northwest A&F University, Yangling, Shannxi 712100, China.
| | - Yuxuan Song
- College of Animal Science and Technology, Northwest A&F University, Yangling, Shannxi 712100, China.
| | - Lei Zhang
- College of Animal Science and Technology, Northwest A&F University, Yangling, Shannxi 712100, China.
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Liu C, Zhang H, Yang Y, Cao Y, Liang D. Association Between Dietary Zinc Intake and Increased Renal Function in US Adults. Biol Trace Elem Res 2023:10.1007/s12011-023-03969-6. [PMID: 38015328 DOI: 10.1007/s12011-023-03969-6] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/15/2023] [Accepted: 11/19/2023] [Indexed: 11/29/2023]
Abstract
We aimed to investigate the association between the dietary zinc intake and the risk of albuminuria, low estimated glomerular filtration rate (eGFR), and chronic kidney disease (CKD) in the US general population. This study was a cross-sectional study utilizing the data from the 2003-2018 National Health and Nutrition Examination Survey. Albuminuria was defined as urinary albumin:creatinine ratio (ACR) > 30 mg/g. Low eGFR was defined as an eGFR of less than 60 mL/min/1.73 m2. CKD is characterized by albuminuria or low eGFR. Multivariate logistic regression analysis, subgroup analyses, interaction tests, and restricted cubic spline (RCS) analysis were performed in this study. For 37,195 enrolled participants in this study, the mean dietary zinc intake was 11.85 ± 0.07 mg/day, and the rate of albuminuria, low eGFR, and CKD was 9.37%, 6.68%, and 14.10%, respectively. Participants with a higher dietary zinc intake showed a lower risk of albuminuria, low eGFR, and CKD. In the fully adjusted model, we found that participants in the highest dietary zinc intake quartile had 26% lower odds of the rate of CKD than those in quartile 1. Subgroup analyses showed that dietary zinc intake was positively associated with the risk of low eGFR in participants who were now smokers. The potential nonlinear relationship between dietary zinc intake and the risk of CKD and albuminuria was also revealed. Higher dietary zinc intake was significantly associated with a lower likelihood of CKD, which might be helpful in kidney function protection among the general population.
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Affiliation(s)
- Chang Liu
- School of Medicine, Nankai University, Tianjin, China
| | - Hao Zhang
- The Eighth Medical Center, Chinese PLA General Hospital, Beijing, China
| | - Yuwei Yang
- The Eighth Medical Center, Chinese PLA General Hospital, Beijing, China
| | - Yan Cao
- The Eighth Medical Center, Chinese PLA General Hospital, Beijing, China.
| | - Dan Liang
- Department of Endocrine, People's Hospital of Chongqing Liangjiang New Area, Chongqing, China.
- West China Clinical Medical College of Sichuan University, Sichuan, China.
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Li X, Liu Z, He Z, Wang X, Li R, Wang J, Ma G, Zhang P, Ma C. Acteoside protects podocyte against apoptosis through regulating AKT/GSK-3β signaling pathway in db/db mice. BMC Endocr Disord 2023; 23:230. [PMID: 37872577 PMCID: PMC10591407 DOI: 10.1186/s12902-023-01483-3] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/21/2022] [Accepted: 10/09/2023] [Indexed: 10/25/2023] Open
Abstract
BACKGROUND Podocyte apoptosis is one of the important pathological mechanisms of diabetic kidney disease (DKD). Acteoside (Act), a major active component of Rehmannia glutinosa leaves total glycoside, has a strong renoprotective action. Our study aims to demonstrate Act's renoprotective actions in db/db mice. METHODS We adopted C57BLKS/J db/db mice as DKD animal models. After 8 weeks of Act administration, the 24-hour urine albumin, renal function index, and blood lipid levels were quantified using matching kits. Renal pathology was evaluated by HE and PAS staining. The podocyte damage and apoptosis-related signaling pathway were observed by using immunohistochemistry, western blot, and TUNEL staining. RESULTS The albuminuria of db/db mice was reduced from 391 ug/24 h to 152 ug/24 h, and renal pathology changes were alleviated after Act administration. The western blot and immunohistochemistry showed that Act treatment upregulated the synaptopodin and podocin expression compared with db/db mice, while the TUNEL staining indicated podocyte apoptosis was inhibited. The B-cell lymphoma-2 (Bcl-2) level was upregulated in the Act group, but cleaved caspase-3 and Bcl-2 associated X protein (Bax) expression declined, while the protein kinase B/glycogen synthase kinase-3β (AKT/GSK-3β) signaling pathway was repressed. CONCLUSIONS By inhibiting the AKT/GSK-3β signaling pathway, Act protected podocytes from apoptosis, decreasing the urine albumin of db/db mice and delaying the course of DKD.
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Affiliation(s)
- Xiaoya Li
- Department of Nephrology, Shanxi Provincial People's Hospital, Taiyuan, China
- Department of Nephrology, The Fifth Clinical Medical College of Shanxi Medical University, Fifth Hospital of Shanxi Medical University, Taiyuan, China
- Shanxi Provincial Key Laboratory of Kidney Disease, Shanxi Provincial People's Hospital, Taiyuan, China
| | - Zhilong Liu
- Shanxi Provincial Key Laboratory of Kidney Disease, Shanxi Provincial People's Hospital, Taiyuan, China
- The Third Clinical College, Shanxi University of Chinese Medicine, Jinzhong, China
| | - Zhixiu He
- Department of Nephrology, Shanxi Provincial People's Hospital, Taiyuan, China
- Department of Nephrology, The Fifth Clinical Medical College of Shanxi Medical University, Fifth Hospital of Shanxi Medical University, Taiyuan, China
- Shanxi Provincial Key Laboratory of Kidney Disease, Shanxi Provincial People's Hospital, Taiyuan, China
| | - Xiaocheng Wang
- Department of Medical Record & Statistics, Shanxi Provincial People's Hospital, Taiyuan, China
| | - Rongshan Li
- Department of Nephrology, Shanxi Provincial People's Hospital, Taiyuan, China
- Department of Nephrology, The Fifth Clinical Medical College of Shanxi Medical University, Fifth Hospital of Shanxi Medical University, Taiyuan, China
- Shanxi Provincial Key Laboratory of Kidney Disease, Shanxi Provincial People's Hospital, Taiyuan, China
| | - Junwei Wang
- Shanxi Provincial Key Laboratory of Kidney Disease, Shanxi Provincial People's Hospital, Taiyuan, China
- The Third Clinical College, Shanxi University of Chinese Medicine, Jinzhong, China
| | - Guiqiao Ma
- Shanxi Provincial Key Laboratory of Kidney Disease, Shanxi Provincial People's Hospital, Taiyuan, China
- The Third Clinical College, Shanxi University of Chinese Medicine, Jinzhong, China
| | - Peipei Zhang
- Department of Nephrology, Shanxi Provincial People's Hospital, Taiyuan, China
- Department of Nephrology, The Fifth Clinical Medical College of Shanxi Medical University, Fifth Hospital of Shanxi Medical University, Taiyuan, China
- Shanxi Provincial Key Laboratory of Kidney Disease, Shanxi Provincial People's Hospital, Taiyuan, China
| | - Chanjuan Ma
- Department of Nephrology, Shanxi Provincial People's Hospital, Taiyuan, China.
- Department of Nephrology, The Fifth Clinical Medical College of Shanxi Medical University, Fifth Hospital of Shanxi Medical University, Taiyuan, China.
- Shanxi Provincial Key Laboratory of Kidney Disease, Shanxi Provincial People's Hospital, Taiyuan, China.
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Naas S, Schiffer M, Schödel J. Hypoxia and renal fibrosis. Am J Physiol Cell Physiol 2023; 325:C999-C1016. [PMID: 37661918 DOI: 10.1152/ajpcell.00201.2023] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/23/2023] [Revised: 08/25/2023] [Accepted: 08/25/2023] [Indexed: 09/05/2023]
Abstract
Renal fibrosis is the final stage of most progressive kidney diseases. Chronic kidney disease (CKD) is associated with high comorbidity and mortality. Thus, preventing fibrosis and thereby preserving kidney function increases the quality of life and prolongs the survival of patients with CKD. Many processes such as inflammation or metabolic stress modulate the progression of kidney fibrosis. Hypoxia has also been implicated in the pathogenesis of renal fibrosis, and oxygen sensing in the kidney is of outstanding importance for the body. The dysregulation of oxygen sensing in the diseased kidney is best exemplified by the loss of stimulation of erythropoietin production from interstitial cells in the fibrotic kidney despite anemia. Furthermore, hypoxia is present in acute or chronic kidney diseases and may affect all cell types present in the kidney including tubular and glomerular cells as well as resident immune cells. Pro- and antifibrotic effects of the transcription factors hypoxia-inducible factors 1 and 2 have been described in a plethora of animal models of acute and chronic kidney diseases, but recent advances in sequencing technologies now allow for novel and deeper insights into the role of hypoxia and its cell type-specific effects on the progression of renal fibrosis, especially in humans. Here, we review existing literature on how hypoxia impacts the development and progression of renal fibrosis.
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Affiliation(s)
- Stephanie Naas
- Department of Nephrology and Hypertension, Uniklinikum Erlangen und Friedrich-Alexander-Universität Erlangen-Nürnberg, Erlangen, Germany
| | - Mario Schiffer
- Department of Nephrology and Hypertension, Uniklinikum Erlangen und Friedrich-Alexander-Universität Erlangen-Nürnberg, Erlangen, Germany
| | - Johannes Schödel
- Department of Nephrology and Hypertension, Uniklinikum Erlangen und Friedrich-Alexander-Universität Erlangen-Nürnberg, Erlangen, Germany
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Chi Y, Zhang X, Liang D, Wang Y, Cai X, Dong J, Li L, Chi Z. ZnT8 Exerts Anti-apoptosis of Kidney Tubular Epithelial Cell in Diabetic Kidney Disease Through TNFAIP3-NF-κB Signal Pathways. Biol Trace Elem Res 2023; 201:2442-2457. [PMID: 35871203 DOI: 10.1007/s12011-022-03361-w] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/23/2022] [Accepted: 07/13/2022] [Indexed: 02/05/2023]
Abstract
Apoptosis of kidney tubular epithelial cells contributes to diabetic kidney disease (DKD) pathophysiology, but the mechanisms are not fully understood. Zinc transporter protein member 8 (ZnT8, SLC30A8) is a susceptive gene in diabetes. Here, we aim to investigate whether ZnT8 has effects on pathophysiology of DKD. The animal groups include control, ZnT8KO mice, STZ-induced, and ZnT8-KO-STZ. STZ-induced DKD was performed in male C57BL/6 J mice and in ZnT8-KO mice. High glucose (HG)-induced apoptosis in a normal rat kidney tubular epithelial cell line (NRK-52E cells) was performed in vitro. Transfection of hZnT8-EGFP or TNFAIP3 siRNA was done in NRK-52E cells. Flow cytometry with Annexin V-FITC/PI double staining and TUNEL analysis was performed for the detection of apoptosis. Gene expression at mRNA and protein levels was examined with real-time RT-PCR and Western blot. Urine albumin to creatinine ratio, proinflammatory cytokines, and apoptosis were enhanced in kidneys of STZ and ZnT8-KO-STZ mice compared to control or ZnT8-KO mice. ZnT8 overexpression after hZnT8-EGFP transfection decreased HG-stimulated inflammatory activity and apoptosis in NRK-52E cells. Furthermore, treatment with ZnSO4 blunted HG-induced apoptosis and NF-κB activation. ZnSO4 increased the abundance of zinc-finger protein TNF-α-induced protein 3 (TNFAIP3). Also, ZnT8 over-expression after hZnT8-EGFP transfection significantly ameliorates HG-induced NF-κB-dependent transcriptional activity and apoptotic protein expressions in NRK-52E cells, but the inhibitory effect of ZnT8 was significantly abolished with TNFAIP3 siRNA. Our study provides evidence that ZnT8 has protective effects against apoptosis of renal tubular epithelial cells through induction of TNFAIP3 and subsequent suppression of the NF-κB pathway.
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Affiliation(s)
- Yinmao Chi
- Department of Physiology, China Medical University, Shenyang, Liaoning Province, 110001, People's Republic of China
| | - Xiuli Zhang
- Department of Nephrology, The First Affiliated Hospital of Shenzhen University, Shenzhen Second People's Hospital, Shenzhen, Guangdong Province, 518000, People's Republic of China.
- Department of Nephrology, Second People's Hospital, The First Affiliated Hospital of Shenzhen University, Shenzhen, Guangdong Province, 518000, People's Republic of China.
| | - Dan Liang
- Troops of 95988 Unit, Changchun, Jilin, 158000, People's Republic of China
| | - Yue Wang
- Department of Tissue Culture, Liaoning University of Traditional Chinese Medicine, Shenyang, Liaoning Province, 110001, People's Republic of China
| | - Xiaoyi Cai
- Department of Nephrology, The First Affiliated Hospital of Shenzhen University, Shenzhen Second People's Hospital, Shenzhen, Guangdong Province, 518000, People's Republic of China
- Shantou University Medical College, Shantou, Guangdong Province, 515000, People's Republic of China
| | - Jiqiu Dong
- Department of Nephrology, The First Affiliated Hospital of Shenzhen University, Shenzhen Second People's Hospital, Shenzhen, Guangdong Province, 518000, People's Republic of China
| | - Lingzhi Li
- Department of Nephrology, The First Affiliated Hospital of Shenzhen University, Shenzhen Second People's Hospital, Shenzhen, Guangdong Province, 518000, People's Republic of China
| | - Zhihong Chi
- Department of Pathophysiology, China Medical University, Shenyang, Liaoning Province, 110001, People's Republic of China
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6
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Yang S, Zhong S, Deng Z, Xie T, Yin G, Wang L, Liu J, Yang J, Long Z, Jiang X, Tan J. Hyperforin regulates renal fibrosis via targeting the PI3K-AKT/ICAM1 axis. Cell Signal 2023; 108:110691. [PMID: 37116554 DOI: 10.1016/j.cellsig.2023.110691] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/20/2022] [Revised: 03/18/2023] [Accepted: 04/25/2023] [Indexed: 04/30/2023]
Abstract
OBJECTIVE To explore the role and mechanism of hyperforin (one of the active components of Sophora flavescens) in renal fibrosis. METHODS The active compounds and target proteins of Sophora flavescens were first screened through TCMSP (https://tcmsp-e.com/). The renal fibrosis-related genes were analyzed through GeneCards (https://www.genecards.org/). The differentially expressed genes (DEGs) in renal fibrosis in GEO dataset GSE156181 were obtained. Metascape was applied for target protein enrichment analysis. TGF-β1-stimulated renal tubular epithelial cells were used for renal fibrosis cell model establishment. The unilateral ureteral obstruction (UUO) mouse model was used for the renal fibrosis in vivo model. Cell viability was detected using an MTT assay. Immunofluorescence staining was employed to detect cell morphology changes and the expression of α-SMA and collagen I. Hematoxylin and eosin (H&E) and Masson staining were employed to determine the renal morphologic change. qRT-PCR or Western blotting was applied to determine the expression levels of the target proteins. RESULTS After intersecting the analysis results of TCMSP, GeneCards, and dataset GSE156181, hyperforin targeting ICAM1 was identified. Metascape pathway enrichment analysis results revealed that the effective compounds of Sophora flavescens were tightly associated with extracellular matrix (ECM) remodeling and inflammatory response. MTT assay demonstrated that hyperforin had no toxic effect on cells. Immunofluorescence staining results evidenced that hyperforin could partially restore TGF-β1-induced epithelial-mesenchymal transition (EMT), the PI3K/AKT pathway activation, and ICAM1 upregulation, and these effects of hyperforin could be reversed by ICAM1 overexpression. While the PI3K/AKT pathway activator IGF-1 effectively reversed the EMT inhibition effect of hyperforin on renal tubular epithelial cells. Moreover, the UUO mouse model further confirmed that hyperforin reduced renal fibrosis. CONCLUSION Hyperforin inhibited renal fibrosis via the PI3K/AKT/ICAM1 axis.
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Affiliation(s)
- Songbai Yang
- Department of Urology, The Third Xiangya Hospital of Central South University, Changsha 410013, China
| | - Sheng Zhong
- Department of Urology, The Third Xiangya Hospital of Central South University, Changsha 410013, China
| | - Zhijun Deng
- Department of Urology, The Third Xiangya Hospital of Central South University, Changsha 410013, China
| | - Tongjin Xie
- Department of Urology, The Third Xiangya Hospital of Central South University, Changsha 410013, China
| | - Guangmin Yin
- Department of Urology, The Third Xiangya Hospital of Central South University, Changsha 410013, China
| | - Long Wang
- Department of Urology, The Third Xiangya Hospital of Central South University, Changsha 410013, China
| | - Jianye Liu
- Department of Urology, The Third Xiangya Hospital of Central South University, Changsha 410013, China
| | - Jianfu Yang
- Department of Urology, The Third Xiangya Hospital of Central South University, Changsha 410013, China
| | - Zhi Long
- Department of Urology, The Third Xiangya Hospital of Central South University, Changsha 410013, China
| | - Xianzhen Jiang
- Department of Urology, The Third Xiangya Hospital of Central South University, Changsha 410013, China
| | - Jing Tan
- Department of Urology, The Third Xiangya Hospital of Central South University, Changsha 410013, China.
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Aschner M, Skalny AV, Lu R, Santamaria A, Zhou JC, Ke T, Karganov MY, Tsatsakis A, Golokhvast KS, Bowman AB, Tinkov AA. The role of hypoxia-inducible factor 1 alpha (HIF-1α) modulation in heavy metal toxicity. Arch Toxicol 2023; 97:1299-1318. [PMID: 36933023 DOI: 10.1007/s00204-023-03483-7] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/08/2023] [Accepted: 03/02/2023] [Indexed: 03/19/2023]
Abstract
Hypoxia-inducible factor 1 (HIF-1) is an oxygen-sensing transcriptional regulator orchestrating a complex of adaptive cellular responses to hypoxia. Several studies have demonstrated that toxic metal exposure may also modulate HIF-1α signal transduction pathway, although the existing data are scarce. Therefore, the present review aims to summarize the existing data on the effects of toxic metals on HIF-1 signaling and the potential underlying mechanisms with a special focus on prooxidant effect of the metals. The particular effect of metals was shown to be dependent on cell type, varying from down- to up-regulation of HIF-1 pathway. Inhibition of HIF-1 signaling may contribute to impaired hypoxic tolerance and adaptation, thus promoting hypoxic damage in the cells. In contrast, its metal-induced activation may result in increased tolerance to hypoxia through increased angiogenesis, thus promoting tumor growth and contributing to carcinogenic effect of heavy metals. Up-regulation of HIF-1 signaling is mainly observed upon Cr, As, and Ni exposure, whereas Cd and Hg may both stimulate and inhibit HIF-1 pathway. The mechanisms underlying the influence of toxic metal exposure on HIF-1 signaling involve modulation of prolyl hydroxylases (PHD2) activity, as well as interference with other tightly related pathways including Nrf2, PI3K/Akt, NF-κB, and MAPK signaling. These effects are at least partially mediated by metal-induced ROS generation. Hypothetically, maintenance of adequate HIF-1 signaling upon toxic metal exposure through direct (PHD2 modulation) or indirect (antioxidant) mechanisms may provide an additional strategy for prevention of adverse effects of metal toxicity.
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Affiliation(s)
- Michael Aschner
- Department of Molecular Pharmacology, Albert Einstein College of Medicine, Bronx, NY, 10461, USA
| | - Anatoly V Skalny
- IM Sechenov First Moscow State Medical University (Sechenov University), 119435, Moscow, Russia
| | - Rongzhu Lu
- Department of Preventive Medicine and Public Health Laboratory Science, School of Medicine, Jiangsu University, Zhenjiang, 212013, Jiangsu, China
| | - Abel Santamaria
- Laboratorio de Aminoácidos Excitadores/Laboratorio de Neurofarmacología Molecular y Nanotecnología, Instituto Nacional de Neurología y Neurocirugía, 14269, Mexico City, Mexico
| | - Ji-Chang Zhou
- School of Public Health (Shenzhen), Sun Yat-Sen University, Shenzhen, 518100, China
| | - Tao Ke
- Department of Molecular Pharmacology, Albert Einstein College of Medicine, Bronx, NY, 10461, USA
| | | | - Aristides Tsatsakis
- IM Sechenov First Moscow State Medical University (Sechenov University), 119435, Moscow, Russia.,Laboratory of Toxicology, Medical School, University of Crete, Voutes, 700 13, Heraklion, Crete, Greece
| | - Kirill S Golokhvast
- Siberian Federal Scientific Centre of Agrobiotechnologies of the Russian Academy of Sciences, Krasnoobsk, Russia
| | - Aaron B Bowman
- School of Health Sciences, Purdue University, West Lafayette, USA
| | - Alexey A Tinkov
- IM Sechenov First Moscow State Medical University (Sechenov University), 119435, Moscow, Russia. .,Laboratory of Ecobiomonitoring and Quality Control, Yaroslavl State University, 150003, Yaroslavl, Russia.
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Nutraceutical Prevention of Diabetic Complications—Focus on Dicarbonyl and Oxidative Stress. Curr Issues Mol Biol 2022; 44:4314-4338. [PMID: 36135209 PMCID: PMC9498143 DOI: 10.3390/cimb44090297] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/09/2022] [Revised: 08/25/2022] [Accepted: 09/16/2022] [Indexed: 11/16/2022] Open
Abstract
Oxidative and dicarbonyl stress, driven by excess accumulation of glycolytic intermediates in cells that are highly permeable to glucose in the absence of effective insulin activity, appear to be the chief mediators of the complications of diabetes. The most pathogenically significant dicarbonyl stress reflects spontaneous dephosphorylation of glycolytic triose phosphates, giving rise to highly reactive methylglyoxal. This compound can be converted to harmless lactate by the sequential activity of glyoxalase I and II, employing glutathione as a catalyst. The transcription of glyoxalase I, rate-limiting for this process, is promoted by Nrf2, which can be activated by nutraceutical phase 2 inducers such as lipoic acid and sulforaphane. In cells exposed to hyperglycemia, glycine somehow up-regulates Nrf2 activity. Zinc can likewise promote glyoxalase I transcription, via activation of the metal-responsive transcription factor (MTF) that binds to the glyoxalase promoter. Induction of glyoxalase I and metallothionein may explain the protective impact of zinc in rodent models of diabetic complications. With respect to the contribution of oxidative stress to diabetic complications, promoters of mitophagy and mitochondrial biogenesis, UCP2 inducers, inhibitors of NAPDH oxidase, recouplers of eNOS, glutathione precursors, membrane oxidant scavengers, Nrf2 activators, and correction of diabetic thiamine deficiency should help to quell this.
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9
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Liu L, Sun Q, Davis F, Mao J, Zhao H, Ma D. Epithelial-mesenchymal transition in organ fibrosis development: current understanding and treatment strategies. BURNS & TRAUMA 2022; 10:tkac011. [PMID: 35402628 PMCID: PMC8990740 DOI: 10.1093/burnst/tkac011] [Citation(s) in RCA: 30] [Impact Index Per Article: 15.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 09/21/2021] [Revised: 12/16/2021] [Indexed: 01/10/2023]
Abstract
Organ fibrosis is a process in which cellular homeostasis is disrupted and extracellular matrix is excessively deposited. Fibrosis can lead to vital organ failure and there are no effective treatments yet. Although epithelial–mesenchymal transition (EMT) may be one of the key cellular mechanisms, the underlying mechanisms of fibrosis remain largely unknown. EMT is a cell phenotypic process in which epithelial cells lose their cell-to-cell adhesion and polarization, after which they acquire mesenchymal features such as infiltration and migration ability. Upon injurious stimulation in different organs, EMT can be triggered by multiple signaling pathways and is also regulated by epigenetic mechanisms. This narrative review summarizes the current understanding of the underlying mechanisms of EMT in fibrogenesis and discusses potential strategies for attenuating EMT to prevent and/or inhibit fibrosis. Despite better understanding the role of EMT in fibrosis development, targeting EMT and beyond in developing therapeutics to tackle fibrosis is challenging but likely feasible.
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Affiliation(s)
- Lexin Liu
- Division of Anaesthetics, Pain Medicine and Intensive Care, Department of Surgery and Cancer, Faculty of Medicine, Imperial College London, Chelsea and Westminster Hospital, London, SW10 9NH, UK.,Department of Nephrology and Urology, Pediatric Urolith Center, The Children's Hospital of Zhejiang University School of Medicine, National Clinical Research Center for Child Health, Hangzhou, Zhejiang Province, 310003, China
| | - Qizhe Sun
- Division of Anaesthetics, Pain Medicine and Intensive Care, Department of Surgery and Cancer, Faculty of Medicine, Imperial College London, Chelsea and Westminster Hospital, London, SW10 9NH, UK
| | - Frank Davis
- Division of Anaesthetics, Pain Medicine and Intensive Care, Department of Surgery and Cancer, Faculty of Medicine, Imperial College London, Chelsea and Westminster Hospital, London, SW10 9NH, UK
| | - Jianhua Mao
- Department of Nephrology, The Children Hospital of Zhejiang University, School of Medicine, Hangzhou, Zhejiang Province, 310003, China
| | - Hailin Zhao
- Division of Anaesthetics, Pain Medicine and Intensive Care, Department of Surgery and Cancer, Faculty of Medicine, Imperial College London, Chelsea and Westminster Hospital, London, SW10 9NH, UK
| | - Daqing Ma
- Division of Anaesthetics, Pain Medicine and Intensive Care, Department of Surgery and Cancer, Faculty of Medicine, Imperial College London, Chelsea and Westminster Hospital, London, SW10 9NH, UK
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10
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Gembillo G, Visconti L, Giuffrida AE, Labbozzetta V, Peritore L, Lipari A, Calabrese V, Piccoli GB, Torreggiani M, Siligato R, Santoro D. Role of Zinc in Diabetic Kidney Disease. Nutrients 2022; 14:nu14071353. [PMID: 35405968 PMCID: PMC9003285 DOI: 10.3390/nu14071353] [Citation(s) in RCA: 9] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/08/2022] [Revised: 03/19/2022] [Accepted: 03/22/2022] [Indexed: 12/23/2022] Open
Abstract
Diabetic Kidney Disease (DKD) represents the most common cause of Chronic Kidney Disease (CKD) in developed countries. Approximately 30% to 40% of diabetes mellitus (DM) subjects develop DKD, and its presence significantly increases the risk for morbidity and mortality. In this context, Zinc seems to have a potential role in kidney and body homeostasis in diabetic individuals as well as in patients at a high risk of developing this condition. This essential element has functions that may counteract diabetes-related risk factors and complications, which include stabilization of insulin hexamers and pancreatic insulin storage and improved glycemic control. In our review, we analyzed the current knowledge on the role of zinc in the management of renal impairment in course of DM. Several studies underline the critical role of zinc in reducing oxidative stress levels, which is considered the common denominator of the mechanisms responsible for the progression of kidney disease. Reaching and maintaining a proper serum zinc level could represent a valuable target to reduce symptoms related to DM complications and contrast the progression of kidney impairment in patients with the high risk of developing end-stage renal disease. In conclusion, analyzing the beneficial role of zinc in this review would advance our knowledge on the possible strategies of DM and DKD treatment.
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Affiliation(s)
- Guido Gembillo
- Unit of Nephrology and Dialysis, Department of Clinical and Experimental Medicine, University of Messina, 98125 Messina, Italy; (A.E.G.); (V.L.); (L.P.); (A.L.); (V.C.)
- Department of Biomedical and Dental Sciences and Morpho-Functional Imaging, University of Messina, 98125 Messina, Italy;
- Correspondence: (G.G.); (D.S.)
| | - Luca Visconti
- Unit of Nephrology and Dialysis, Ospedali Riuniti Villa Sofia Cervello, University of Palermo, 90146 Palermo, Italy;
| | - Alfio Edoardo Giuffrida
- Unit of Nephrology and Dialysis, Department of Clinical and Experimental Medicine, University of Messina, 98125 Messina, Italy; (A.E.G.); (V.L.); (L.P.); (A.L.); (V.C.)
| | - Vincenzo Labbozzetta
- Unit of Nephrology and Dialysis, Department of Clinical and Experimental Medicine, University of Messina, 98125 Messina, Italy; (A.E.G.); (V.L.); (L.P.); (A.L.); (V.C.)
| | - Luigi Peritore
- Unit of Nephrology and Dialysis, Department of Clinical and Experimental Medicine, University of Messina, 98125 Messina, Italy; (A.E.G.); (V.L.); (L.P.); (A.L.); (V.C.)
| | - Antonella Lipari
- Unit of Nephrology and Dialysis, Department of Clinical and Experimental Medicine, University of Messina, 98125 Messina, Italy; (A.E.G.); (V.L.); (L.P.); (A.L.); (V.C.)
| | - Vincenzo Calabrese
- Unit of Nephrology and Dialysis, Department of Clinical and Experimental Medicine, University of Messina, 98125 Messina, Italy; (A.E.G.); (V.L.); (L.P.); (A.L.); (V.C.)
| | - Giorgina Barbara Piccoli
- Néphrologie Et Dialyse, Centre Hospitalier Le Mans, 194 Avenue Rubillard, 72000 Le Mans, France; (G.B.P.); (M.T.)
| | - Massimo Torreggiani
- Néphrologie Et Dialyse, Centre Hospitalier Le Mans, 194 Avenue Rubillard, 72000 Le Mans, France; (G.B.P.); (M.T.)
| | - Rossella Siligato
- Department of Biomedical and Dental Sciences and Morpho-Functional Imaging, University of Messina, 98125 Messina, Italy;
- Unit of Nephrology, Azienda Ospedaliera Universitaria Sant’Anna, 44124 Ferrara, Italy
| | - Domenico Santoro
- Unit of Nephrology and Dialysis, Department of Clinical and Experimental Medicine, University of Messina, 98125 Messina, Italy; (A.E.G.); (V.L.); (L.P.); (A.L.); (V.C.)
- Correspondence: (G.G.); (D.S.)
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11
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Jia B, Yang H, Zhang Z, Qu X, Jia X, Wu Q, Han Y, Zheng Y, Dai K. Biodegradable Zn-Sr alloy for bone regeneration in rat femoral condyle defect model: In vitro and in vivo studies. Bioact Mater 2021; 6:1588-1604. [PMID: 33294736 PMCID: PMC7691683 DOI: 10.1016/j.bioactmat.2020.11.007] [Citation(s) in RCA: 64] [Impact Index Per Article: 21.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/15/2020] [Revised: 11/03/2020] [Accepted: 11/03/2020] [Indexed: 12/13/2022] Open
Abstract
Bone defects are commonly caused by severe trauma, malignant tumors, or congenital diseases and remain among the toughest clinical problems faced by orthopedic surgeons, especially when of critical size. Biodegradable zinc-based metals have recently gained popularity for their desirable biocompatibility, suitable degradation rate, and favorable osteogenesis-promoting properties. The biphasic activity of Sr promotes osteogenesis and inhibits osteoclastogenesis, which imparts Zn-Sr alloys with the ideal theoretical osteogenic properties. Herein, a biodegradable Zn-Sr binary alloy system was fabricated. The cytocompatibility and osteogenesis of the Zn-Sr alloys were significantly better than those of pure Zn in MC3T3-E1 cells. RNA-sequencing illustrated that the Zn-0.8Sr alloy promoted osteogenesis by activating the wnt/β-catenin, PI3K/Akt, and MAPK/Erk signaling pathways. Furthermore, rat femoral condyle defects were repaired using Zn-0.8Sr alloy scaffolds, with pure Ti as a control. The scaffold-bone integration and bone ingrowth confirmed the favorable in vivo repair properties of the Zn-Sr alloy, which was verified to offer satisfactory biosafety based on the hematoxylin-eosin (H&E) staining and ion concentration testing of important organs. The Zn-0.8Sr alloy was identified as an ideal bone repair material candidate, especially for application in critical-sized defects on load-bearing sites due to its favorable biocompatibility and osteogenic properties in vitro and in vivo.
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Affiliation(s)
- Bo Jia
- Department of Orthopaedic Surgery, Shanghai Key Laboratory of Orthopaedic Implants, Shanghai Ninth People's Hospital, Shanghai Jiaotong University, School of Medicine, Shanghai, 200011, China
- Department of Orthopedics, Shanghai General Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, 200080, China
| | - Hongtao Yang
- Department of Materials Science and Engineering, College of Engineering, Peking University, Beijing, 100871, China
- Department of Materials Science and Engineering, The Ohio State University, Columbus, OH, 43210, United States
| | - Zechuan Zhang
- Department of Materials Science and Engineering, College of Engineering, Peking University, Beijing, 100871, China
| | - Xinhua Qu
- Department of Bone and Joint Surgery, Renji Hospital, School of Medicine, Shanghai Jiao Tong University, Shanghai, 200127, China
| | - Xiufeng Jia
- Department of Orthopaedic Surgery, Wudi People's Hospital, Binzhou, 251900, China
| | - Qiang Wu
- Department of Orthopaedic Surgery, Shanghai Key Laboratory of Orthopaedic Implants, Shanghai Ninth People's Hospital, Shanghai Jiaotong University, School of Medicine, Shanghai, 200011, China
| | - Yu Han
- Department of Orthopaedic Surgery, Shanghai Key Laboratory of Orthopaedic Implants, Shanghai Ninth People's Hospital, Shanghai Jiaotong University, School of Medicine, Shanghai, 200011, China
| | - Yufeng Zheng
- Department of Materials Science and Engineering, College of Engineering, Peking University, Beijing, 100871, China
| | - Kerong Dai
- Department of Orthopaedic Surgery, Shanghai Key Laboratory of Orthopaedic Implants, Shanghai Ninth People's Hospital, Shanghai Jiaotong University, School of Medicine, Shanghai, 200011, China
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12
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Karatzas E, Kakouri AC, Kolios G, Delis A, Spyrou GM. Fibrotic expression profile analysis reveals repurposed drugs with potential anti-fibrotic mode of action. PLoS One 2021; 16:e0249687. [PMID: 33826640 PMCID: PMC8026018 DOI: 10.1371/journal.pone.0249687] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/07/2020] [Accepted: 03/22/2021] [Indexed: 02/07/2023] Open
Abstract
Fibrotic diseases cover a spectrum of systemic and organ-specific maladies that affect a large portion of the population, currently without cure. The shared characteristic these diseases feature is their uncontrollable fibrogenesis deemed responsible for the accumulated damage in the susceptible tissues. Idiopathic Pulmonary Fibrosis, an interstitial lung disease, is one of the most common and studied fibrotic diseases and still remains an active research target. In this study we highlight unique and common (i) genes, (ii) biological pathways and (iii) candidate repurposed drugs among 9 fibrotic diseases. We identify 7 biological pathways involved in all 9 fibrotic diseases as well as pathways unique to some of these diseases. Based on our Drug Repurposing results, we suggest captopril and ibuprofen that both appear to slow the progression of fibrotic diseases according to existing bibliography. We also recommend nafcillin and memantine, which haven't been studied against fibrosis yet, for further wet-lab experimentation. We also observe a group of cardiomyopathy-related pathways that are exclusively highlighted for Oral Submucous Fibrosis. We suggest digoxin to be tested against Oral Submucous Fibrosis, since we observe cardiomyopathy-related pathways implicated in Oral Submucous Fibrosis and there is bibliographic evidence that digoxin may potentially clear myocardial fibrosis. Finally, we establish that Idiopathic Pulmonary Fibrosis shares several involved genes, biological pathways and candidate inhibiting-drugs with Dupuytren's Disease, IgG4-related Disease, Systemic Sclerosis and Cystic Fibrosis. We propose that treatments for these fibrotic diseases should be jointly pursued.
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Affiliation(s)
- Evangelos Karatzas
- Department of Informatics and Telecommunications, University of Athens, Athens, Greece
| | - Andrea C. Kakouri
- Department of Bioinformatics, The Cyprus Institute of Neurology and Genetics, Nicosia, Cyprus
- Department of Neurogenetics, The Cyprus Institute of Neurology and Genetics, Nicosia, Cyprus
- The Cyprus School of Molecular Medicine, Nicosia, Cyprus
| | - George Kolios
- Department of Medicine, Democritus University of Thrace, Alexandroupolis, Greece
| | - Alex Delis
- Department of Informatics and Telecommunications, University of Athens, Athens, Greece
| | - George M. Spyrou
- Department of Bioinformatics, The Cyprus Institute of Neurology and Genetics, Nicosia, Cyprus
- The Cyprus School of Molecular Medicine, Nicosia, Cyprus
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RNA interactions in right ventricular dysfunction induced type II cardiorenal syndrome. Aging (Albany NY) 2021; 13:4215-4241. [PMID: 33494070 PMCID: PMC7906202 DOI: 10.18632/aging.202385] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/06/2020] [Accepted: 11/23/2020] [Indexed: 01/08/2023]
Abstract
Right ventricular (RV) dysfunction induced type II cardiorenal syndrome (CRS) has a high mortality rate, but little attention has been paid to this disease, and its unique molecular characteristics remain unclear. This study aims to investigate the transcriptomic expression profile in this disease and identify key RNA pairs that regulate related molecular signaling networks. We established an RV dysfunction-induced type II CRS mouse model by pulmonary artery constriction (PAC). PAC mice developed severe RV hypertrophy and fibrosis; renal atrophy and dysfunction with elevated creatinine were subsequently observed. Expression profiles in RV and kidney tissues were obtained by whole transcriptome sequencing, revealing a total of 741 and 86 differentially expressed (DE) mRNAs, 159 and 29 DEmiRNAs and 233 and 104 DEcircRNAs between RV and kidney tissue, respectively. Competing endogenous RNA (ceRNA) networks were established. A significant alteration in proliferative, fibrotic and metabolic pathways was found based on GO and KEGG analyses, and the network revealed key ceRNA pairs, such as novel_circ_002631/miR-181a-5p/Creb1 and novel_circ_002631/miR-33-y/Kpan6. These findings indicate that significantly dysregulated pathways in RV dysfunction induced type II CRS include Ras, PI3K/Akt, cGMP-PKG pathways, and thyroid metabolic pathways. These ceRNA pairs can be considered potential targets for the treatment of type II CRS.
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14
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Barman S, Srinivasan K. Diabetes and zinc dyshomeostasis: Can zinc supplementation mitigate diabetic complications? Crit Rev Food Sci Nutr 2020; 62:1046-1061. [PMID: 33938330 DOI: 10.1080/10408398.2020.1833178] [Citation(s) in RCA: 18] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Abstract
Zinc present in the islet cells of the pancreas is crucial for the synthesis, storage, and secretion of insulin. The excretion of large amounts of zinc from the body is reported in diabetic situations. Zinc depletion and increased oxidative stress have a major impact on the pathogenesis of diabetic complications. It would be most relevant to ascertain if intervention with supplemental zinc compensating for its depletion would beneficially mitigate hyperglycemia and the attendant metabolic abnormalities, and secondary complications in diabetes. An exhaustive literature search on this issue indicates: (1) Concurrent hypozincemia and decreased tissue zinc stores in diabetes as a result of its increased urinary excretion and/or decreased intestinal absorption, (2) Several recent experimental studies have documented that supplemental zinc has a potential hypoglycemic effect in the diabetic situation, and also beneficially modulate the attendant metabolic abnormalities and compromised antioxidant status, and (3) Supplemental zinc also alleviates renal lesions, cataract and the risk of cardiovascular disease accompanying diabetes mellitus, and help restore gastrointestinal health in experimental diabetes. These studies have also attempted to identify the precise mechanisms responsible for zinc-mediated beneficial effects in diabetic situation. The evidence discussed in this review highlights that supplemental zinc may significantly contribute to its clinical application in the management of diabetic hyperglycemia and related metabolic abnormalities, and in the alleviation of secondary complications resulting from diabetic oxidative stress.
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Affiliation(s)
- Susmita Barman
- Department of Biochemistry, CSIR - Central Food Technological Research Institute, Mysore, India
| | - Krishnapura Srinivasan
- Department of Biochemistry, CSIR - Central Food Technological Research Institute, Mysore, India
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15
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Gu L, Hong F, Fan K, Zhao L, Zhang C, Yu B, Chai C. Integrated Network Pharmacology Analysis and Pharmacological Evaluation to Explore the Active Components and Mechanism of Abelmoschus manihot (L.) Medik. on Renal Fibrosis. DRUG DESIGN DEVELOPMENT AND THERAPY 2020; 14:4053-4067. [PMID: 33061308 PMCID: PMC7535141 DOI: 10.2147/dddt.s264898] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 06/05/2020] [Accepted: 08/27/2020] [Indexed: 12/11/2022]
Abstract
Background Renal fibrosis is a common pathological outcome of chronic kidney diseases (CKD) that is considered as a global public health issue with high morbidity and mortality. The dry corolla of Abelmoschus manihot (L.) Medik. (AMC) has been used for chronic nephritis in clinic and showed a superior effect in alleviating proteinuria in CKD patients to losartan. However, the effective components and underlying mechanism of AMC in the treatment of renal fibrosis have not been systematically clarified. Methods Based on drug-likeness evaluation, oral bioavailability prediction and compound contents, a systematic network pharmacology analysis was conducted to predict the active ingredients. Gene Ontology, Kyoto Encyclopedia of Genes and Genomes pathway analysis and protein–protein interaction analysis were applied to predict the potential pathway and target of AMC against renal fibrosis. The formula of component contribution index (CI) based on the algorithm was used to screen the principal active compounds of AMC in the treatment of renal fibrosis. Finally, pharmacological evaluation was conducted to validate the protective effect and primary predicted mechanism of AMC in the treatment of renal fibrosis on a 5/6 nephrectomy mice model. Results Fourteen potential active components of AMC possessing favorable pharmacokinetic profiles and biological activities were selected and hit by 17 targets closely related to renal fibrosis. Quercetin, caffeic acid, 9.12-octadecadienoic acid, and myricetin are recognized as the more highly predictive components as their cumulative contribution rate reached 85.86%. The AMC administration on 5/6 nephrectomy mice showed a protective effect on kidney function and renal fibrosis. The hub genes analysis revealed that AMC plays a major role in inhibiting epithelial-to-mesenchymal transition during renal fibrosis. Conclusion Our results predicted active components and potential targets of AMC for the application to renal fibrosis from a holistic perspective, as well as provided valuable direction for further research of AMC and improved comprehension of renal fibrosis pathogenesis.
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Affiliation(s)
- Lifei Gu
- Jiangsu Key Laboratory of TCM Evaluation and Translational Research, School of Traditional Chinese Pharmacy, China Pharmaceutical University, Nanjing 211198, People's Republic of China
| | - Fang Hong
- Jiangsu Key Laboratory of TCM Evaluation and Translational Research, School of Traditional Chinese Pharmacy, China Pharmaceutical University, Nanjing 211198, People's Republic of China
| | - Kaikai Fan
- Jiangsu Key Laboratory of TCM Evaluation and Translational Research, School of Traditional Chinese Pharmacy, China Pharmaceutical University, Nanjing 211198, People's Republic of China
| | - Lei Zhao
- Jiangsu Key Laboratory of TCM Evaluation and Translational Research, School of Traditional Chinese Pharmacy, China Pharmaceutical University, Nanjing 211198, People's Republic of China
| | - Chunlei Zhang
- Jiangsu Key Laboratory of TCM Evaluation and Translational Research, School of Traditional Chinese Pharmacy, China Pharmaceutical University, Nanjing 211198, People's Republic of China
| | - Boyang Yu
- Jiangsu Key Laboratory of TCM Evaluation and Translational Research, School of Traditional Chinese Pharmacy, China Pharmaceutical University, Nanjing 211198, People's Republic of China.,Research Center for Traceability and Standardization of TCMs, School of Traditional Chinese Pharmacy, China Pharmaceutical University, Nanjing 211198, People's Republic of China
| | - Chengzhi Chai
- Jiangsu Key Laboratory of TCM Evaluation and Translational Research, School of Traditional Chinese Pharmacy, China Pharmaceutical University, Nanjing 211198, People's Republic of China
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16
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Faivre A, Scholz CC, de Seigneux S. Hypoxia in chronic kidney disease: towards a paradigm shift? Nephrol Dial Transplant 2020; 36:1782-1790. [PMID: 33895835 DOI: 10.1093/ndt/gfaa091] [Citation(s) in RCA: 18] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/07/2020] [Indexed: 11/15/2022] Open
Abstract
Chronic kidney disease (CKD) is defined as an alteration of kidney structure and/or function lasting for >3 months [1]. CKD affects 10% of the general adult population and is responsible for large healthcare costs [2]. Since the end of the last century, the role of hypoxia in CKD progression has controversially been discussed. To date, there is evidence of the presence of hypoxia in late-stage renal disease, but we lack time-course evidence, stage correlation and also spatial co-localization with fibrotic lesions to ensure its causative role. The classical view of hypoxia in CKD progression is that it is caused by peritubular capillary alterations, renal anaemia and increased oxygen consumption regardless of the primary injury. In this classical view, hypoxia is assumed to further induce pro-fibrotic and pro-inflammatory responses, as well as oxidative stress, leading to CKD worsening as part of a vicious circle. However, recent investigations tend to question this paradigm, and both the presence of hypoxia and its role in CKD progression are still not clearly demonstrated. Hypoxia-inducible factor (HIF) is the main transcriptional regulator of the hypoxia response. Genetic HIF modulation leads to variable effects on CKD progression in different murine models. In contrast, pharmacological modulation of the HIF pathway [i.e. by HIF hydroxylase inhibitors (HIs)] appears to be generally protective against fibrosis progression experimentally. We here review the existing literature on the role of hypoxia, the HIF pathway and HIF HIs in CKD progression and summarize the evidence that supports or rejects the hypoxia hypothesis, respectively.
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Affiliation(s)
- Anna Faivre
- Department of Cell physiology and Metabolism, University of Geneva, Geneva, Switzerland
| | - Carsten C Scholz
- Institute of Physiology, University of Zurich, Zurich, Switzerland.,National Centre of Competence in Research "Kidney.CH", Zurich, Switzerland
| | - Sophie de Seigneux
- Department of Cell physiology and Metabolism, University of Geneva, Geneva, Switzerland.,National Centre of Competence in Research "Kidney.CH", Zurich, Switzerland.,Department of Medicine, Service of Nephrology, Geneva University Hospitals, Geneva, Switzerland
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17
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Wang S, Nie P, Lu X, Li C, Dong X, Yang F, Luo P, Li B. Nrf2 participates in the anti-apoptotic role of zinc in Type 2 diabetic nephropathy through Wnt/β-catenin signaling pathway. J Nutr Biochem 2020; 84:108451. [PMID: 32795642 DOI: 10.1016/j.jnutbio.2020.108451] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/28/2019] [Revised: 04/11/2020] [Accepted: 05/27/2020] [Indexed: 12/13/2022]
Abstract
Zinc (Zn), as an essential trace element, has been approved to serve many roles in diabetic studies. Also Zn deficiency will aggravate renal damage in diabetes through suppression of nuclear factor-erythroid 2-related factor 2 (Nrf2) expression and function. The purpose of this study was to illustrate the role of Zn in renal apoptosis in diabetes and whether Nrf2 participated in the process. Type 2 diabetes mice model was induced by a single dose of streptozotocin (STZ) injection after high-fat diet (HFD) feeding for 3 months, then the mice were given diets supplemented with different concentrations of Zn (control, 30 ppm; low-concentration, 0.85 ppm). After 12-week treatment, morphology and associated protein expressions were examined. The results showed that low Zn diet significantly aggravated the level of renal apoptosis during diabetes, performed as the upregulation of caspase-3 expression. In addition, either low Zn diet or diabetes or both dramatically decreased the expression of Nrf2 and P-AKT in kidney. Moreover, the expression of β-catenin in kidney was increased markedly in diabetic groups. Mechanistic study applying human renal tubular epithelial cells (HK11) confirmed the role of Nrf2, as silencing Nrf2 expression abolished Zn supplementation protection against high sugar + high fat + low Zn-induced apoptosis and downregulation of β-catenin expression. All these results suggest that Nrf2 plays a key role in Zn protection against Type 2 diabetes induced renal apoptosis, which might be through Wnt/β-catenin signaling pathway.
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Affiliation(s)
- Songyan Wang
- Department of Nephropathy, The Second Hospital of Jilin University, 218 Ziqiang Street, Changchun 130041, China; Department of Nephropathy, Jilin Province People's Hospital, 1183 Gongnong Road, Changchun 130021, China.
| | - Ping Nie
- Department of Nephropathy, The Second Hospital of Jilin University, 218 Ziqiang Street, Changchun 130041, China.
| | - Xiaodan Lu
- Diagnostics Medical Center, Jilin Province People's Hospital, 1183 Gongnong Road, Changchun 130021, China.
| | - Chunguang Li
- Department of Surgery, Changchun Traditional Chinese Medicine Hospital, 1913 Taibei Street, Changchun 130000, China.
| | - Xiaoming Dong
- Department of Orthopedics, The Second Hospital of Jilin University, 218 Ziqiang Street, Changchun 130041, China.
| | - Fan Yang
- Department of Nephropathy, Jilin Province People's Hospital, 1183 Gongnong Road, Changchun 130021, China.
| | - Ping Luo
- Department of Nephropathy, The Second Hospital of Jilin University, 218 Ziqiang Street, Changchun 130041, China.
| | - Bing Li
- Department of Nephropathy, The Second Hospital of Jilin University, 218 Ziqiang Street, Changchun 130041, China.
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18
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Wei X, Zhu X, Jiang L, Huang X, Zhang Y, Zhao D, Du Y. Recent advances in understanding the role of hypoxia-inducible factor 1α in renal fibrosis. Int Urol Nephrol 2020; 52:1287-1295. [PMID: 32378138 DOI: 10.1007/s11255-020-02474-2] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/30/2019] [Accepted: 04/15/2020] [Indexed: 12/11/2022]
Abstract
Renal fibrosis is the most common pathological manifestation of chronic kidney disease (CKD), and with numerous influencing factors, its pathogenesis is complex. Epithelial-mesenchymal transition (EMT) is known to promote the progression of renal fibrosis via alterations in the secreted proteome. Moreover, blocking or even reversing EMT can effectively reduce the degree of fibrosis. As such, targeting the key molecules responsible for promoting EMT may be an effective strategy for inhibiting renal fibrosis. Research in recent years has demonstrated that hypoxia-inducible factor 1α (HIF-1α) acts to promote renal fibrosis through regulation of EMT. However, the relationship between HIF-1α and EMT remains incompletely understood. In the present review, the underlying mechanism of the interaction between HIF-1α and EMT is explored to provide novel insight into the pathogenesis of renal fibrosis and new ideas for early targeted intervention.
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Affiliation(s)
- Xuejiao Wei
- Department of Nephrology, The First Hospital of Jilin University, 71 XinMin Street, Changchun, Jilin, China
| | - Xiaoyu Zhu
- Department of Nephrology, The First Hospital of Jilin University, 71 XinMin Street, Changchun, Jilin, China
| | - Lili Jiang
- Department of Nephrology, The First Hospital of Jilin University, 71 XinMin Street, Changchun, Jilin, China
| | - Xiu Huang
- Department of Nephrology, The First Hospital of Jilin University, 71 XinMin Street, Changchun, Jilin, China
| | - Yangyang Zhang
- Department of Nephrology, The First Hospital of Jilin University, 71 XinMin Street, Changchun, Jilin, China
| | - Dan Zhao
- Department of Nephrology, The First Hospital of Jilin University, 71 XinMin Street, Changchun, Jilin, China
| | - Yujun Du
- Department of Nephrology, The First Hospital of Jilin University, 71 XinMin Street, Changchun, Jilin, China.
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19
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The role of extracellular vesicles in renal fibrosis. Cell Death Dis 2019; 10:367. [PMID: 31068572 PMCID: PMC6506498 DOI: 10.1038/s41419-019-1605-2] [Citation(s) in RCA: 23] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Abstract] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/27/2019] [Revised: 04/11/2019] [Accepted: 04/16/2019] [Indexed: 12/15/2022]
Abstract
As a particularly important mediator of intercellular communication, extracellular vesicles (EVs) have been proved to be extensively involved in various system diseases over the past two decades, including in renal diseases. As is well-known, renal fibrosis is the common pathological process of any ongoing renal disease or adaptive repair of kidney injury based on current knowledge. Although much work has been performed focusing on EVs in various renal diseases, the role of EVs in renal fibrosis has not been described in detail and summarized. In this review, we provide a brief overview of the definition, classification and biological process of EVs. Then, the potential mechanisms of EVs in renal fibrosis are illustrated. Lastly, recent advances in EVs and the implications of EVs for diagnosis and therapy in renal fibrosis disease are introduced. We look forward to a more comprehensive understanding of EVs in renal fibrosis, which could be a boon to patients with renal fibrosis disease.
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20
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Bahri S, Abdennabi R, Mlika M, Neji G, Jameleddine S, Ali RB. Effect of Phoenix dactylifera L. Sap Against Bleomycin-Induced Pulmonary Fibrosis and Oxidative Stress in Rats: Phytochemical and Therapeutic Assessment. Nutr Cancer 2019; 71:781-791. [DOI: 10.1080/01635581.2018.1521442] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
Affiliation(s)
- Sana Bahri
- Laboratory of Physiology, Faculty of Medicine of Tunis, University of Tunis El Manar, Tunis, Tunisia
- Laboratory of Physiopathology, Food and Biomolecules (LR-17-ES-03), Technology Center of SidiThabet, University of Manouba, Tunis, Tunisia
| | - Raed Abdennabi
- Laboratory of Pharmacognosy and Natural Products Chemistry, Athens, Greece
- Laboratory of Plant Biotechnology, Faculty of Science, University of Sfax, Sfax, Tunisia
| | - Mona Mlika
- Laboratory of Anatomy and Pathology, Abderhaman Mami Hospital, Ariana, Tunisia
| | - Gharsallah Neji
- Laboratory of Pharmacognosy and Natural Products Chemistry, Athens, Greece
| | - Saloua Jameleddine
- Laboratory of Physiology, Faculty of Medicine of Tunis, University of Tunis El Manar, Tunis, Tunisia
- Laboratory of Physiopathology, Food and Biomolecules (LR-17-ES-03), Technology Center of SidiThabet, University of Manouba, Tunis, Tunisia
| | - Ridha Ben Ali
- Laboratory of Experimental Medicine, Faculty of Medicine of Tunis, University of Tunis El Manar, Tunis, Tunisia
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21
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Wu CT, Wang CC, Huang LC, Liu SH, Chiang CK. Plasticizer Di-(2-Ethylhexyl)Phthalate Induces Epithelial-to-Mesenchymal Transition and Renal Fibrosis In Vitro and In Vivo. Toxicol Sci 2018; 164:363-374. [DOI: 10.1093/toxsci/kfy094] [Citation(s) in RCA: 27] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/30/2023] Open
Affiliation(s)
- Cheng-Tien Wu
- Graduate Institute of Toxicology, College of Medicine, National Taiwan University, Taipei, Taiwan
| | - Ching-Chia Wang
- Department of Pediatrics, National Taiwan University Hospital, Taipei, Taiwan
| | - Li-Chen Huang
- Graduate Institute of Toxicology, College of Medicine, National Taiwan University, Taipei, Taiwan
| | - Shing-Hwa Liu
- Graduate Institute of Toxicology, College of Medicine, National Taiwan University, Taipei, Taiwan
- Department of Pediatrics, National Taiwan University Hospital, Taipei, Taiwan
- Department of Medical Research, China Medical University Hospital, China Medical University, Taichung, Taiwan
| | - Chih-Kang Chiang
- Graduate Institute of Toxicology, College of Medicine, National Taiwan University, Taipei, Taiwan
- Department of Integrated Diagnostics & Therapeutics, College of Medicine and Hospital, National Taiwan University, Taipei, Taiwan
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22
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Barman S, Pradeep SR, Srinivasan K. Zinc supplementation alleviates the progression of diabetic nephropathy by inhibiting the overexpression of oxidative-stress-mediated molecular markers in streptozotocin-induced experimental rats. J Nutr Biochem 2018; 54:113-129. [DOI: 10.1016/j.jnutbio.2017.11.008] [Citation(s) in RCA: 25] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/01/2016] [Revised: 11/04/2017] [Accepted: 11/14/2017] [Indexed: 01/06/2023]
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Sun W, Yang J, Wang W, Hou J, Cheng Y, Fu Y, Xu Z, Cai L. The beneficial effects of Zn on Akt-mediated insulin and cell survival signaling pathways in diabetes. J Trace Elem Med Biol 2018; 46:117-127. [PMID: 29413101 DOI: 10.1016/j.jtemb.2017.12.005] [Citation(s) in RCA: 38] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/01/2017] [Revised: 12/06/2017] [Accepted: 12/21/2017] [Indexed: 12/11/2022]
Abstract
Zinc is one of the essential trace elements and participates in numerous physiological processes. Abnormalities in zinc homeostasis often result in the pathogenesis of various chronic metabolic disorders, such as diabetes and its complications. Zinc has insulin-mimetic and anti-diabetic effects and deficiency has been shown to aggravate diabetes-induced oxidative stress and tissue injury in diabetic rodent models and human subjects with diabetes. Akt signaling pathway plays a central role in insulin-stimulated glucose metabolism and cell survival. Anti-diabetic effects of zinc are largely dependent on the activation of Akt signaling. Zn is also an inducer of metallothionein that plays important role in anti-oxidative stress and damage. However, the exact molecular mechanisms underlying zinc-induced activation of Akt signaling pathway remains to be elucidated. This review summarizes the recent advances in deciphering the possible mechanisms of zinc on Akt-mediated insulin and cell survival signaling pathways in diabetes conditions. Insights into the effects of zinc on epigenetic regulation and autophagy in diabetic nephropathy are also discussed in the latter part of this review.
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Affiliation(s)
- Weixia Sun
- Department of Nephrology, The First Hospital of Jilin University, Changchun, Jilin, 130021, China.
| | - Jiaxing Yang
- Department of Gastrointestinal Surgery, The First Hospital of Jilin University, Changchun, Jilin, 130021, China
| | - Wanning Wang
- Department of Nephrology, The First Hospital of Jilin University, Changchun, Jilin, 130021, China; Pediatric Research Institute, The Departments of Pediatrics, Radiation Oncology, Pharmacology and Toxicology, The University of Louisville, Louisville, KY 40202, USA
| | - Jie Hou
- Department of Nephrology, The First Hospital of Jilin University, Changchun, Jilin, 130021, China
| | - Yanli Cheng
- Department of Nephrology, The First Hospital of Jilin University, Changchun, Jilin, 130021, China
| | - Yaowen Fu
- Department of Nephrology, The First Hospital of Jilin University, Changchun, Jilin, 130021, China
| | - Zhonggao Xu
- Department of Nephrology, The First Hospital of Jilin University, Changchun, Jilin, 130021, China.
| | - Lu Cai
- Pediatric Research Institute, The Departments of Pediatrics, Radiation Oncology, Pharmacology and Toxicology, The University of Louisville, Louisville, KY 40202, USA
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24
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Liu F, Hu L, Ma Y, Huang B, Xiu Z, Zhang P, Zhou K, Tang X. Increased expression of monoamine oxidase A is associated with epithelial to mesenchymal transition and clinicopathological features in non-small cell lung cancer. Oncol Lett 2018; 15:3245-3251. [PMID: 29435065 PMCID: PMC5778774 DOI: 10.3892/ol.2017.7683] [Citation(s) in RCA: 23] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/28/2017] [Accepted: 12/14/2017] [Indexed: 12/30/2022] Open
Abstract
Monoamine oxidase A (MAOA), a mitochondrial enzyme, is closely associated with neurological disorders. Recently, MAOA has been linked to the progression of prostate cancer, hepatocellular carcinoma, and cholangiocarcinoma. However, MAOA was reported to have different effects on the progression of these types of cancer, and the role of MAOA in non-small cell lung cancer (NSCLC) progression remains unclear. The present study determined the expression of MAOA and epithelial to mesenchymal transition (EMT) markers in 45 pairs of NSCLC and matched non-tumor adjacent lung tissues, and further analyzed the correlation between MAOA expression and the EMT or the development of clinicopathological features. The results demonstrated that protein and mRNA expression levels of MAOA in NSCLC tissues were higher than those observed in the matched non-tumor adjacent lung tissues. Furthermore, the increased MAOA expression in NSCLC tissues was positively correlated with N-cadherin (r=0.525, P=0.002), Slug (r=0.515, P=0.001), and Twist (r=0.448, P=0.008) expressions, but negatively correlated with E-cadherin expression (r=-0.387, P=0.01). Additionally, the elevated MAOA expression in NSCLC tissues was associated with late stage NSCLC (Z=-2.596, P=0.029) and lymph node metastases (Z=-2.378, P=0.020). These findings suggest that MAOA may have a role in promoting NSCLC progression by mediating EMT.
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Affiliation(s)
- Fei Liu
- Institute of Biochemistry and Molecular Biology, Guangdong Medical University, Zhanjiang, Guangdong 524023, P.R. China
- Guangdong Provincial Key Laboratory of Medical Molecular Diagnostics, Guangdong Medical University, Dongguan, Guangdong 523808, P.R. China
| | - Liang Hu
- Institute of Biochemistry and Molecular Biology, Guangdong Medical University, Zhanjiang, Guangdong 524023, P.R. China
- Guangdong Provincial Key Laboratory of Medical Molecular Diagnostics, Guangdong Medical University, Dongguan, Guangdong 523808, P.R. China
| | - Yuefan Ma
- Institute of Biochemistry and Molecular Biology, Guangdong Medical University, Zhanjiang, Guangdong 524023, P.R. China
- Guangdong Provincial Key Laboratory of Medical Molecular Diagnostics, Guangdong Medical University, Dongguan, Guangdong 523808, P.R. China
| | - Bingyu Huang
- Institute of Biochemistry and Molecular Biology, Guangdong Medical University, Zhanjiang, Guangdong 524023, P.R. China
- Guangdong Provincial Key Laboratory of Medical Molecular Diagnostics, Guangdong Medical University, Dongguan, Guangdong 523808, P.R. China
| | - Zihan Xiu
- Institute of Biochemistry and Molecular Biology, Guangdong Medical University, Zhanjiang, Guangdong 524023, P.R. China
- Guangdong Provincial Key Laboratory of Medical Molecular Diagnostics, Guangdong Medical University, Dongguan, Guangdong 523808, P.R. China
| | - Peihua Zhang
- Institute of Plastic Surgery, Affiliated Hospital of Guangdong Medical University, Zhanjiang, Guangdong 524001, P.R. China
| | - Keyuan Zhou
- Institute of Biochemistry and Molecular Biology, Guangdong Medical University, Zhanjiang, Guangdong 524023, P.R. China
- Guangdong Provincial Key Laboratory of Medical Molecular Diagnostics, Guangdong Medical University, Dongguan, Guangdong 523808, P.R. China
| | - Xudong Tang
- Institute of Biochemistry and Molecular Biology, Guangdong Medical University, Zhanjiang, Guangdong 524023, P.R. China
- Guangdong Provincial Key Laboratory of Medical Molecular Diagnostics, Guangdong Medical University, Dongguan, Guangdong 523808, P.R. China
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25
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Liu M, Ning X, Li R, Yang Z, Yang X, Sun S, Qian Q. Signalling pathways involved in hypoxia-induced renal fibrosis. J Cell Mol Med 2017; 21:1248-1259. [PMID: 28097825 PMCID: PMC5487923 DOI: 10.1111/jcmm.13060] [Citation(s) in RCA: 161] [Impact Index Per Article: 23.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/28/2016] [Accepted: 11/18/2016] [Indexed: 12/23/2022] Open
Abstract
Renal fibrosis is the common pathological hallmark of progressive chronic kidney disease (CKD) with diverse aetiologies. Recent researches have highlighted the critical role of hypoxia during the development of renal fibrosis as a final common pathway in end‐stage kidney disease (ESKD), which joints the scientist's attention recently to exploit the molecular mechanism underlying hypoxia‐induced renal fibrogenesis. The scaring formation is a multilayered cellular response and involves the regulation of multiple hypoxia‐inducible signalling pathways and complex interactive networks. Therefore, this review will focus on the signalling pathways involved in hypoxia‐induced pathogenesis of interstitial fibrosis, including pathways mediated by HIF, TGF‐β, Notch, PKC/ERK, PI3K/Akt, NF‐κB, Ang II/ROS and microRNAs. Roles of molecules such as IL‐6, IL‐18, KIM‐1 and ADO are also reviewed. A comprehensive understanding of the roles that these hypoxia‐responsive signalling pathways and molecules play in the context of renal fibrosis will provide a foundation towards revealing the underlying mechanisms of progression of CKD and identifying novel therapeutic targets. In the future, promising new effective therapy against hypoxic effects may be successfully translated into the clinic to alleviate renal fibrosis and inhibit the progression of CKD.
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Affiliation(s)
- Minna Liu
- Department of Nephrology, Xijing Hospital, Fourth Military Medical University, Xi'an, Shaanxi, China.,State Key Laboratory of Cancer Biology, Fourth Military Medical University, Xi'an, Shaanxi, China
| | - Xiaoxuan Ning
- Department of Geriatrics, Xijing Hospital, Fourth Military Medical University, Xi'an, Shaanxi, China
| | - Rong Li
- Department of Nephrology, Xijing Hospital, Fourth Military Medical University, Xi'an, Shaanxi, China
| | - Zhen Yang
- Department of Nephrology, Xijing Hospital, Fourth Military Medical University, Xi'an, Shaanxi, China.,State Key Laboratory of Cancer Biology, Fourth Military Medical University, Xi'an, Shaanxi, China
| | - Xiaoxia Yang
- Department of Nephrology, Xijing Hospital, Fourth Military Medical University, Xi'an, Shaanxi, China.,State Key Laboratory of Cancer Biology, Fourth Military Medical University, Xi'an, Shaanxi, China
| | - Shiren Sun
- Department of Nephrology, Xijing Hospital, Fourth Military Medical University, Xi'an, Shaanxi, China
| | - Qi Qian
- Department of Medicine, Division of Nephrology and hypertension, Mayo Clinic College of Medicine, Mayo Graduate School, Rochester, MN, USA
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Abstract
Over a decade ago, it was proposed that the regulation of tubular repair in the kidney might involve the recapitulation of developmental pathways. Although the kidney cannot generate new nephrons after birth, suggesting a low level of regenerative competence, the tubular epithelial cells of the nephrons can proliferate to repair the damage after AKI. However, the debate continues over whether this repair involves a persistent progenitor population or any mature epithelial cell remaining after injury. Recent reports have highlighted the expression of Sox9, a transcription factor critical for normal kidney development, during postnatal epithelial repair in the kidney. Indeed, the proliferative response of the epithelium involves expression of several pathways previously described as being involved in kidney development. In some instances, these pathways are also apparently involved in the maladaptive responses observed after repeated injury. Whether development and repair in the kidney are the same processes or we are misinterpreting the similar expression of genes under different circumstances remains unknown. Here, we review the evidence for this link, concluding that such parallels in expression may more correctly represent the use of the same pathways in a distinct context, likely triggered by similar stressors.
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Affiliation(s)
- Melissa Helen Little
- Murdoch Children's Research Institute, Melbourne, Australia; and .,Department of Pediatrics, Faculty of Medicine, Dentistry and Health Sciences, University of Melbourne, Melbourne, Australia
| | - Pamela Kairath
- Murdoch Children's Research Institute, Melbourne, Australia; and.,Department of Pediatrics, Faculty of Medicine, Dentistry and Health Sciences, University of Melbourne, Melbourne, Australia
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