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Hirohama D, Abedini A, Moon S, Surapaneni A, Dillon ST, Vassalotti A, Liu H, Doke T, Martinez V, Md Dom Z, Karihaloo A, Palmer MB, Coresh J, Grams ME, Niewczas MA, Susztak K. Unbiased Human Kidney Tissue Proteomics Identifies Matrix Metalloproteinase 7 as a Kidney Disease Biomarker. J Am Soc Nephrol 2023; 34:1279-1291. [PMID: 37022120 PMCID: PMC10356165 DOI: 10.1681/asn.0000000000000141] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/18/2022] [Accepted: 03/10/2023] [Indexed: 04/07/2023] Open
Abstract
SIGNIFICANCE STATEMENT Although gene expression changes have been characterized in human diabetic kidney disease (DKD), unbiased tissue proteomics information for this condition is lacking. The authors conducted an unbiased aptamer-based proteomic analysis of samples from patients with DKD and healthy controls, identifying proteins with levels that associate with kidney function (eGFR) or fibrosis, after adjusting for key covariates. Overall, tissue gene expression only modestly correlated with tissue protein levels. Kidney protein and RNA levels of matrix metalloproteinase 7 (MMP7) strongly correlated with fibrosis and with eGFR. Single-cell RNA sequencing indicated that kidney tubule cells are an important source of MMP7. Furthermore, plasma MMP7 levels predicted future kidney function decline. These findings identify kidney tissue MMP7 as a biomarker of fibrosis and blood MMP7 as a biomarker for future kidney function decline. BACKGROUND Diabetic kidney disease (DKD) is responsible for close to half of all ESKD cases. Although unbiased gene expression changes have been extensively characterized in human kidney tissue samples, unbiased protein-level information is not available. METHODS We collected human kidney samples from 23 individuals with DKD and ten healthy controls, gathered associated clinical and demographics information, and implemented histologic analysis. We performed unbiased proteomics using the SomaScan platform and quantified the level of 1305 proteins and analyzed gene expression levels by bulk RNA and single-cell RNA sequencing (scRNA-seq). We validated protein levels in a separate cohort of kidney tissue samples as well as in 11,030 blood samples. RESULTS Globally, human kidney transcript and protein levels showed only modest correlation. Our analysis identified 14 proteins with kidney tissue levels that correlated with eGFR and found that the levels of 152 proteins correlated with interstitial fibrosis. Of the identified proteins, matrix metalloprotease 7 (MMP7) showed the strongest association with both fibrosis and eGFR. The correlation between tissue MMP7 protein expression and kidney function was validated in external datasets. The levels of MMP7 RNA correlated with fibrosis in the primary and validation datasets. Findings from scRNA-seq pointed to proximal tubules, connecting tubules, and principal cells as likely cellular sources of increased tissue MMP7 expression. Furthermore, plasma MMP7 levels correlated not only with kidney function but also associated with prospective kidney function decline. CONCLUSIONS Our findings, which underscore the value of human kidney tissue proteomics analysis, identify kidney tissue MMP7 as a diagnostic marker of kidney fibrosis and blood MMP7 as a biomarker for future kidney function decline.
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Affiliation(s)
- Daigoro Hirohama
- Renal Electrolyte and Hypertension Division, Department of Medicine, Perelman School of Medicine, University of Pennsylvania, Philadelphia, Pennsylvania
- Institute of Diabetes, Obesity and Metabolism, University of Pennsylvania, Philadelphia, Pennsylvania
- Department of Genetics, Perelman School of Medicine, University of Pennsylvania, Philadelphia, Pennsylvania
| | - Amin Abedini
- Renal Electrolyte and Hypertension Division, Department of Medicine, Perelman School of Medicine, University of Pennsylvania, Philadelphia, Pennsylvania
- Institute of Diabetes, Obesity and Metabolism, University of Pennsylvania, Philadelphia, Pennsylvania
- Department of Genetics, Perelman School of Medicine, University of Pennsylvania, Philadelphia, Pennsylvania
| | - Salina Moon
- Research Division, Joslin Diabetes Center, One Joslin Place, Boston, Massachusetts
| | - Aditya Surapaneni
- Department of Epidemiology, Johns Hopkins University Bloomberg School of Public Health, Baltimore, Maryland
| | - Simon T. Dillon
- Beth Israel Deaconess Medical Center, Boston, Massachusetts
- Department of Medicine, Harvard Medical School, Boston, Massachusetts
| | - Allison Vassalotti
- Renal Electrolyte and Hypertension Division, Department of Medicine, Perelman School of Medicine, University of Pennsylvania, Philadelphia, Pennsylvania
- Institute of Diabetes, Obesity and Metabolism, University of Pennsylvania, Philadelphia, Pennsylvania
- Department of Genetics, Perelman School of Medicine, University of Pennsylvania, Philadelphia, Pennsylvania
- School of Medicine, Tulane University, New Orleans, Louisiana
| | - Hongbo Liu
- Renal Electrolyte and Hypertension Division, Department of Medicine, Perelman School of Medicine, University of Pennsylvania, Philadelphia, Pennsylvania
- Institute of Diabetes, Obesity and Metabolism, University of Pennsylvania, Philadelphia, Pennsylvania
- Department of Genetics, Perelman School of Medicine, University of Pennsylvania, Philadelphia, Pennsylvania
| | - Tomohito Doke
- Renal Electrolyte and Hypertension Division, Department of Medicine, Perelman School of Medicine, University of Pennsylvania, Philadelphia, Pennsylvania
- Institute of Diabetes, Obesity and Metabolism, University of Pennsylvania, Philadelphia, Pennsylvania
- Department of Genetics, Perelman School of Medicine, University of Pennsylvania, Philadelphia, Pennsylvania
| | - Victor Martinez
- Renal Electrolyte and Hypertension Division, Department of Medicine, Perelman School of Medicine, University of Pennsylvania, Philadelphia, Pennsylvania
- Institute of Diabetes, Obesity and Metabolism, University of Pennsylvania, Philadelphia, Pennsylvania
- Department of Genetics, Perelman School of Medicine, University of Pennsylvania, Philadelphia, Pennsylvania
| | - Zaipul Md Dom
- Research Division, Joslin Diabetes Center, One Joslin Place, Boston, Massachusetts
- Department of Medicine, Harvard Medical School, Boston, Massachusetts
| | - Anil Karihaloo
- Novo Nordisk Research Center Seattle Inc., Seattle, Washington
| | - Matthew B. Palmer
- Department of Pathology and Laboratory Medicine, Perelman School of Medicine, University of Pennsylvania, Philadelphia, Pennsylvania
| | - Josef Coresh
- Department of Epidemiology, Johns Hopkins University Bloomberg School of Public Health, Baltimore, Maryland
- Department of Biostatistics, Johns Hopkins University Bloomberg School of Public Health, Baltimore, Maryland
- Division of Precision Medicine, Department of Medicine, New York University, New York, New York
| | - Morgan E. Grams
- Department of Epidemiology, Johns Hopkins University Bloomberg School of Public Health, Baltimore, Maryland
- Division of Precision Medicine, Department of Medicine, New York University, New York, New York
| | - Monika A. Niewczas
- Research Division, Joslin Diabetes Center, One Joslin Place, Boston, Massachusetts
- Department of Medicine, Harvard Medical School, Boston, Massachusetts
| | - Katalin Susztak
- Renal Electrolyte and Hypertension Division, Department of Medicine, Perelman School of Medicine, University of Pennsylvania, Philadelphia, Pennsylvania
- Institute of Diabetes, Obesity and Metabolism, University of Pennsylvania, Philadelphia, Pennsylvania
- Department of Genetics, Perelman School of Medicine, University of Pennsylvania, Philadelphia, Pennsylvania
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Zheng CM, Lu KC, Chen YJ, Li CY, Lee YH, Chiu HW. Matrix metalloproteinase-7 promotes chronic kidney disease progression via the induction of inflammasomes and the suppression of autophagy. Biomed Pharmacother 2022; 154:113565. [PMID: 36007272 DOI: 10.1016/j.biopha.2022.113565] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/03/2022] [Revised: 08/11/2022] [Accepted: 08/14/2022] [Indexed: 11/02/2022] Open
Abstract
Deposition of extracellular matrix (ECM), epithelial-mesenchymal transition (EMT) and inflammation are crucial processes in chronic kidney disease (CKD) progression. The matrix metalloproteinases (MMPs) belong to a major enzyme group of proteinases that are involved in ECM degradation. MMP controls multiple biological processes, such as cell proliferation, EMT and apoptosis. The present study identified the roles of MMP7 in CKD progression. We demonstrated the transcriptional profiles of MMPs in kidney tissues of CKD patients in the Gene Expression Omnibus (GEO) data repository. MMP7 mRNA level was markedly upregulated in kidney tissues of CKD patients. MMP7 overexpression activated the NLRP3 and NLRP6 inflammasomes and increased fibrosis-related proteins in kidney cells. MMP7 inhibited oxidative stress-induced apoptosis and rapamycin-induced autophagy. We found that MMP7 expression in the kidney was increased in various CKD animal models. Knockdown of MMP7 affected renal function and renal fibrosis in a folic acid-induced CKD model. The inhibition of MMP7 decreased fibrosis and NLRP3 and NLRP6 inflammasomes and induced autophagy in kidney tissues. Taken together, these results provide insight into targeting MMP7 as a therapeutic strategy for CKD.
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Affiliation(s)
- Cai-Mei Zheng
- Division of Nephrology, Department of Internal Medicine, Shuang Ho Hospital, Taipei Medical University, New Taipei City, Taiwan; Division of Nephrology, Department of Internal Medicine, School of Medicine, College of Medicine, Taipei Medical University, Taipei, Taiwan; TMU Research Center of Urology and Kidney, Taipei Medical University, Taipei, Taiwan
| | - Kuo-Cheng Lu
- Division of Nephrology, Taipei Tzu Chi Hospital, Buddhist Tzu Chi Medical Foundation, and School of Medicine, Buddhist Tzu Chi University, Hualien, Taiwan; School of Medicine, Fu-Jen Catholic University, New Taipei City, Taiwan; Division of Nephrology, Department of Medicine, Fu-Jen Catholic University Hospital, New Taipei City, Taiwan
| | - Yi-Jie Chen
- Graduate Institute of Clinical Medicine, College of Medicine, Taipei Medical University, Taipei, Taiwan
| | - Chia-Yi Li
- Department of Biological Sciences, Faculty of Science, University of Alberta, Edmonton, Canada
| | - Yu-Hsuan Lee
- Department of Cosmeceutics, China Medical University, Taichung, Taiwan.
| | - Hui-Wen Chiu
- TMU Research Center of Urology and Kidney, Taipei Medical University, Taipei, Taiwan; Graduate Institute of Clinical Medicine, College of Medicine, Taipei Medical University, Taipei, Taiwan; Department of Medical Research, Shuang Ho Hospital, Taipei Medical University, New Taipei City, Taiwan.
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3
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Biochemical interaction of pyrvinium in gentamicin-induced acute kidney injury by modulating calcium dyshomeostasis and mitochondrial dysfunction. Chem Biol Interact 2022; 363:110020. [PMID: 35750223 DOI: 10.1016/j.cbi.2022.110020] [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: 03/08/2022] [Revised: 06/03/2022] [Accepted: 06/15/2022] [Indexed: 11/21/2022]
Abstract
Acute kidney injury (AKI) has a poor clinical prognosis and increases the risk of chronic kidney failure (CKD). It is a common complication of organ failure in hospitalised patients (10-15% of all hospitalizations) and in intensive care unit (ICU) patients, with an incidence of up to 50%. Concerning ICU, AKI has a mortality rate ranging from 27% to 35%, rising to 60%-65% when dialysis is needed, with roughly 5%-20% of survivors requiring dialysis on discharge. AKI is believed to cause over 7 million deaths per year worldwide. Currently, there is no treatment for AKI or its progression to CKD. When activated by AKI, numerous pathways have been suggested as possible contributors to CKD progression. Wnt/β-catenin is a crucial regulator of kidney development that increases following the injury. Despite the overwhelming evidence that Wnt/β-catenin promotes AKI, tubulointerstitial fibrosis, a hallmark of CKD progression, is also promoted by this pathway. The therapeutic potential of Wnt/β-catenin in the treatment of AKI and the progression from AKI to CKD is being studied. This hypothesis aims to determine whether the Wnt/β-catenin inhibitor pyrvinium has a beneficial effect on the renal dysfunction and damage caused by Gentamicin.
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4
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Klotho-derived peptide 6 ameliorates diabetic kidney disease by targeting Wnt/β-catenin signaling. Kidney Int 2022; 102:506-520. [PMID: 35644285 DOI: 10.1016/j.kint.2022.04.028] [Citation(s) in RCA: 19] [Impact Index Per Article: 9.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/09/2021] [Revised: 04/01/2022] [Accepted: 04/27/2022] [Indexed: 01/02/2023]
Abstract
Diabetic kidney disease (DKD) is one of the most common and devastating complications of diabetic mellitus, and its prevalence is rising worldwide. Klotho, an anti-aging protein, is kidney protective in DKD. However, its large size, prohibitive cost and structural complexity hamper its potential utility in clinics. Here we report that Klotho-derived peptide 6 (KP6) mimics Klotho function and ameliorates DKD. In either an accelerated model of DKD induced by streptozotocin and advanced oxidation protein products in unilateral nephrectomized mice or db/db mice genetically prone to diabetes, chronic infusion of KP6 reversed established proteinuria, attenuated glomerular hypertrophy, mitigated podocyte damage, and ameliorated glomerulosclerosis and interstitial fibrotic lesions, but did not affect serum phosphorus and calcium levels. KP6 inhibited β-catenin activation in vivo and blocked the expression of its downstream target genes in glomerular podocytes and tubular epithelial cells. In vitro, KP6 prevented podocyte injury and inhibited β-catenin activation induced by high glucose without affecting Wnt expression. Co-immunoprecipitation revealed that KP6 bound to Wnt ligands and disrupted the engagement of Wnts with low density lipoprotein receptor-related protein 6, thereby interrupting Wnt/β-catenin signaling. Mutated KP6 with a scrambled amino acid sequence failed to bind Wnts and did not alleviate DKD in db/db mice. Thus, our studies identified KP6 as a novel Klotho-derived peptide that ameliorated DKD by blocking Wnt/β-catenin. Hence, our findings also suggest a new therapeutic strategy for the treatment of patients with DKD.
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Matrix metalloproteinases and tissue inhibitors of matrix metalloproteinases in kidney disease. Adv Clin Chem 2021; 105:141-212. [PMID: 34809827 DOI: 10.1016/bs.acc.2021.02.003] [Citation(s) in RCA: 16] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Matrix metalloproteinases (MMPs) are a group of zinc and calcium endopeptidases which cleave extracellular matrix (ECM) proteins. They are also involved in the degradation of cell surface components and regulate multiple cellular processes, cell to cell interactions, cell proliferation, and cell signaling pathways. MMPs function in close interaction with the endogenous tissue inhibitors of matrix metalloproteinases (TIMPs), both of which regulate cell turnover, modulate various growth factors, and participate in the progression of tissue fibrosis and apoptosis. The multiple roles of MMPs and TIMPs are continuously elucidated in kidney development and repair, as well as in a number of kidney diseases. This chapter focuses on the current findings of the significance of MMPs and TIMPs in a wide range of kidney diseases, whether they result from kidney tissue changes, hemodynamic alterations, tubular epithelial cell apoptosis, inflammation, or fibrosis. In addition, the potential use of these endopeptidases as biomarkers of renal dysfunction and as targets for therapeutic interventions to attenuate kidney disease are also explored in this review.
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Ko MC, Frankl-Vilches C, Bakker A, Gahr M. The Gene Expression Profile of the Song Control Nucleus HVC Shows Sex Specificity, Hormone Responsiveness, and Species Specificity Among Songbirds. Front Neurosci 2021; 15:680530. [PMID: 34135731 PMCID: PMC8200640 DOI: 10.3389/fnins.2021.680530] [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: 03/14/2021] [Accepted: 04/28/2021] [Indexed: 11/17/2022] Open
Abstract
Singing occurs in songbirds of both sexes, but some species show typical degrees of sex-specific performance. We studied the transcriptional sex differences in the HVC, a brain nucleus critical for song pattern generation, of the forest weaver (Ploceus bicolor), the blue-capped cordon-bleu (Uraeginthus cyanocephalus), and the canary (Serinus canaria), which are species that show low, medium, and high levels of sex-specific singing, respectively. We observed persistent sex differences in gene expression levels regardless of the species-specific sexual singing phenotypes. We further studied the HVC transcriptomes of defined phenotypes of canary, known for its testosterone-sensitive seasonal singing. By studying both sexes of canaries during both breeding and non-breeding seasons, non-breeding canaries treated with testosterone, and spontaneously singing females, we found that the circulating androgen levels and sex were the predominant variables associated with the variations in the HVC transcriptomes. The comparison of natural singing with testosterone-induced singing in canaries of the same sex revealed considerable differences in the HVC transcriptomes. Strong transcriptional changes in the HVC were detected during the transition from non-singing to singing in canaries of both sexes. Although the sex-specific genes of singing females shared little resemblance with those of males, our analysis showed potential functional convergences. Thus, male and female songbirds achieve comparable singing behaviours with sex-specific transcriptomes.
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Affiliation(s)
- Meng-Ching Ko
- Department of Behavioural Neurobiology, Max Planck Institute for Ornithology, Seewiesen, Germany
| | - Carolina Frankl-Vilches
- Department of Behavioural Neurobiology, Max Planck Institute for Ornithology, Seewiesen, Germany
| | - Antje Bakker
- Department of Behavioural Neurobiology, Max Planck Institute for Ornithology, Seewiesen, Germany
| | - Manfred Gahr
- Department of Behavioural Neurobiology, Max Planck Institute for Ornithology, Seewiesen, Germany
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7
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Huffstater T, Merryman WD, Gewin LS. Wnt/β-Catenin in Acute Kidney Injury and Progression to Chronic Kidney Disease. Semin Nephrol 2021; 40:126-137. [PMID: 32303276 DOI: 10.1016/j.semnephrol.2020.01.004] [Citation(s) in RCA: 25] [Impact Index Per Article: 8.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/08/2023]
Abstract
Acute kidney injury (AKI) portends a poor clinical prognosis and increases the risk for the development of chronic kidney disease (CKD). Currently, there are no therapies to treat AKI or prevent its progression to CKD. Wnt/β-catenin is a critical regulator of kidney development that is up-regulated after injury. Most of the literature support a beneficial role for Wnt/β-catenin in AKI, but suggest that this pathway promotes the progression of tubulointerstitial fibrosis, the hallmark of CKD progression. We review the role of Wnt/β-catenin in renal injury with a focus on its potential as a therapeutic target in AKI and in AKI to CKD transition.
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Affiliation(s)
- Tessa Huffstater
- Department of Biomedical Engineering, Vanderbilt University, Nashville, TN
| | - W David Merryman
- Department of Biomedical Engineering, Vanderbilt University, Nashville, TN
| | - Leslie S Gewin
- Division of Nephrology and Hypertension, Department of Medicine, Vanderbilt University Medical Center, Nashville, TN; Department of Medicine, Veterans Affairs Hospital, Tennessee Valley Healthcare System, Nashville, TN; Department of Cell and Developmental Biology, Vanderbilt University, Nashville, TN.
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8
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Sharad S, Allemang TC, Li H, Nousome D, Ku AT, Whitlock NC, Sowalsky AG, Cullen J, Sesterhenn IA, McLeod DG, Srivastava S, Dobi A. Age and Tumor Differentiation-Associated Gene Expression Based Analysis of Non-Familial Prostate Cancers. Front Oncol 2021; 10:584280. [PMID: 33575208 PMCID: PMC7870995 DOI: 10.3389/fonc.2020.584280] [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: 07/16/2020] [Accepted: 12/03/2020] [Indexed: 11/13/2022] Open
Abstract
Prostate cancer incidence in young men has increased. Patients diagnosed at an earlier age are likely to have aggressive prostate cancer and treatment decisions are continuing to be weighted by patient age and life expectancy. Identification of age-associated gene-expression signatures hold great potential to augment current and future treatment modalities. To investigate age-specific tumor associated gene signatures and their potential biomarkers for disease aggressiveness, this study was designed and stratified into well and poorly differentiated tumor types of young (42–58 years) and old (66–73 years) prostate cancer patients. The differentially expressed genes related to tumor-normal differences between non-familial prostate cancer patients were identified and several genes uniquely associated with the age and tumor differentiation are markedly polarized. Overexpressed genes known to be associated with somatic genomic alterations was predominantly found in young men, such as TMPRESS2-ERG and c-MYC. On the other hand, old men have mostly down-regulated gene expressions indicating the loss of protective genes and reduced cell mediated immunity indicated by decreased HLA-A and HLA-B expression. The normalization for the benign signatures between the age groups indicates a significant age and tumor dependent heterogeneity exists among the patients with a great potential for age-specific and tumor differentiation-based therapeutic stratification of prostate cancer.
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Affiliation(s)
- Shashwat Sharad
- Center for Prostate Disease Research, John P. Murtha Cancer Center Research Program, Department of Surgery, Uniformed Services University of the Health Sciences and Walter Reed National Military Medical Center, Bethesda, MD, United States.,Henry M. Jackson Foundation for the Advancement of Military Medicine, Bethesda, MD, United States
| | - Travis C Allemang
- Center for Prostate Disease Research, John P. Murtha Cancer Center Research Program, Department of Surgery, Uniformed Services University of the Health Sciences and Walter Reed National Military Medical Center, Bethesda, MD, United States
| | - Hua Li
- Center for Prostate Disease Research, John P. Murtha Cancer Center Research Program, Department of Surgery, Uniformed Services University of the Health Sciences and Walter Reed National Military Medical Center, Bethesda, MD, United States.,Henry M. Jackson Foundation for the Advancement of Military Medicine, Bethesda, MD, United States
| | - Darryl Nousome
- Center for Prostate Disease Research, John P. Murtha Cancer Center Research Program, Department of Surgery, Uniformed Services University of the Health Sciences and Walter Reed National Military Medical Center, Bethesda, MD, United States.,Henry M. Jackson Foundation for the Advancement of Military Medicine, Bethesda, MD, United States
| | - Anson Tai Ku
- Laboratory of Genitourinary Cancer Pathogenesis, National Cancer Institute, NIH, Bethesda, MD, United States
| | - Nichelle C Whitlock
- Laboratory of Genitourinary Cancer Pathogenesis, National Cancer Institute, NIH, Bethesda, MD, United States
| | - Adam G Sowalsky
- Laboratory of Genitourinary Cancer Pathogenesis, National Cancer Institute, NIH, Bethesda, MD, United States
| | - Jennifer Cullen
- Center for Prostate Disease Research, John P. Murtha Cancer Center Research Program, Department of Surgery, Uniformed Services University of the Health Sciences and Walter Reed National Military Medical Center, Bethesda, MD, United States
| | | | - David G McLeod
- Center for Prostate Disease Research, John P. Murtha Cancer Center Research Program, Department of Surgery, Uniformed Services University of the Health Sciences and Walter Reed National Military Medical Center, Bethesda, MD, United States
| | - Shiv Srivastava
- Center for Prostate Disease Research, John P. Murtha Cancer Center Research Program, Department of Surgery, Uniformed Services University of the Health Sciences and Walter Reed National Military Medical Center, Bethesda, MD, United States
| | - Albert Dobi
- Center for Prostate Disease Research, John P. Murtha Cancer Center Research Program, Department of Surgery, Uniformed Services University of the Health Sciences and Walter Reed National Military Medical Center, Bethesda, MD, United States.,Henry M. Jackson Foundation for the Advancement of Military Medicine, Bethesda, MD, United States
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Wilkening A, Krappe J, Mühe AM, Lindenmeyer MT, Eltrich N, Luckow B, Vielhauer V. C-C chemokine receptor type 2 mediates glomerular injury and interstitial fibrosis in focal segmental glomerulosclerosis. Nephrol Dial Transplant 2020; 35:227-239. [PMID: 30597038 DOI: 10.1093/ndt/gfy380] [Citation(s) in RCA: 13] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/29/2018] [Accepted: 11/05/2018] [Indexed: 01/12/2023] Open
Abstract
BACKGROUND Glomerulosclerosis and tubulointerstitial fibrosis are hallmarks of chronic kidney injury leading to end-stage renal disease. Inflammatory mechanisms contribute to glomerular and interstitial scarring, including chemokine-mediated recruitment of leucocytes. In particular, accumulation of C-C chemokine receptor type 2 (CCR2)-expressing macrophages promotes renal injury and fibrotic remodelling in diseases like glomerulonephritis and diabetic nephropathy. The functional role of CCR2 in the initiation and progression of primary glomerulosclerosis induced by podocyte injury remains to be characterized. METHODS We analysed glomerular expression of CCR2 and its chemokine ligand C-C motif chemokine ligand 2 (CCL2) in human focal segmental glomerulosclerosis (FSGS). Additionally, CCL2 expression was determined in stimulated murine glomeruli and glomerular cells in vitro. To explore pro-inflammatory and profibrotic functions of CCR2 we induced adriamycin nephropathy, a murine model of FSGS, in BALB/c wild-type and Ccr2-deficient mice. RESULTS Glomerular expression of CCR2 and CCL2 significantly increased in human FSGS. In adriamycin-induced FSGS, progressive glomerular scarring and reduced glomerular nephrin expression was paralleled by induced glomerular expression of CCL2. Adriamycin exposure stimulated secretion of CCL2 and tumour necrosis factor-α (TNF) in isolated glomeruli and mesangial cells and CCL2 in parietal epithelial cells. In addition, TNF induced CCL2 expression in all glomerular cell populations, most prominently in podocytes. In vivo, Ccr2-deficient mice with adriamycin nephropathy showed reduced injury, macrophage and fibrocyte infiltration and inflammation in glomeruli and the tubulointerstitium. Importantly, glomerulosclerosis and tubulointerstitial fibrosis were significantly ameliorated. CONCLUSIONS Our data indicate that CCR2 is an important mediator of glomerular injury and progression of FSGS. CCR2- targeting therapies may represent a novel approach for its treatment.
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Affiliation(s)
- Anja Wilkening
- Nephrologisches Zentrum, Medizinische Klinik und Poliklinik IV, Klinikum der Universität München, Ludwig-Maximilians-Universität München, Munich, Germany
| | - Julia Krappe
- Nephrologisches Zentrum, Medizinische Klinik und Poliklinik IV, Klinikum der Universität München, Ludwig-Maximilians-Universität München, Munich, Germany
| | - Anne M Mühe
- Nephrologisches Zentrum, Medizinische Klinik und Poliklinik IV, Klinikum der Universität München, Ludwig-Maximilians-Universität München, Munich, Germany
| | - Maja T Lindenmeyer
- Nephrologisches Zentrum, Medizinische Klinik und Poliklinik IV, Klinikum der Universität München, Ludwig-Maximilians-Universität München, Munich, Germany
| | - Nuru Eltrich
- Nephrologisches Zentrum, Medizinische Klinik und Poliklinik IV, Klinikum der Universität München, Ludwig-Maximilians-Universität München, Munich, Germany
| | - Bruno Luckow
- Nephrologisches Zentrum, Medizinische Klinik und Poliklinik IV, Klinikum der Universität München, Ludwig-Maximilians-Universität München, Munich, Germany
| | - Volker Vielhauer
- Nephrologisches Zentrum, Medizinische Klinik und Poliklinik IV, Klinikum der Universität München, Ludwig-Maximilians-Universität München, Munich, Germany
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10
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Liu Z, Tan RJ, Liu Y. The Many Faces of Matrix Metalloproteinase-7 in Kidney Diseases. Biomolecules 2020; 10:biom10060960. [PMID: 32630493 PMCID: PMC7356035 DOI: 10.3390/biom10060960] [Citation(s) in RCA: 43] [Impact Index Per Article: 10.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/01/2020] [Revised: 06/19/2020] [Accepted: 06/22/2020] [Indexed: 12/11/2022] Open
Abstract
Matrix metalloproteinase-7 (MMP-7) is a secreted zinc-dependent endopeptidase that is implicated in regulating kidney homeostasis and diseases. MMP-7 is produced as an inactive zymogen, and proteolytic cleavage is required for its activation. MMP-7 is barely expressed in normal adult kidney but upregulated in acute kidney injury (AKI) and chronic kidney disease (CKD). The expression of MMP-7 is transcriptionally regulated by Wnt/β-catenin and other cues. As a secreted protein, MMP-7 is present and increased in the urine of patients, and its levels serve as a noninvasive biomarker for predicting AKI prognosis and monitoring CKD progression. Apart from degrading components of the extracellular matrix, MMP-7 also cleaves a wide range of substrates, such as E-cadherin, Fas ligand, and nephrin. As such, it plays an essential role in regulating many cellular processes, such as cell proliferation, apoptosis, epithelial-mesenchymal transition, and podocyte injury. The function of MMP-7 in kidney diseases is complex and context-dependent. It protects against AKI by priming tubular cells for survival and regeneration but promotes kidney fibrosis and CKD progression. MMP-7 also impairs podocyte integrity and induces proteinuria. In this review, we summarized recent advances in our understanding of the regulation, role, and mechanisms of MMP-7 in the pathogenesis of kidney diseases. We also discussed the potential of MMP-7 as a biomarker and therapeutic target in a clinical setting.
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Affiliation(s)
- Zhao Liu
- State Key Laboratory of Organ Failure Research, National Clinical Research Center of Kidney Disease, Nanfang Hospital, Southern Medical University, Guangzhou 510515, China;
| | - Roderick J. Tan
- Renal-Electrolyte Division, Department of Medicine, University of Pittsburgh School of Medicine, Pittsburgh, PA 15261, USA;
| | - Youhua Liu
- State Key Laboratory of Organ Failure Research, National Clinical Research Center of Kidney Disease, Nanfang Hospital, Southern Medical University, Guangzhou 510515, China;
- Department of Pathology, University of Pittsburgh School of Medicine, Pittsburgh, PA 15261, USA
- Correspondence:
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11
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Nlandu-Khodo S, Osaki Y, Scarfe L, Yang H, Phillips-Mignemi M, Tonello J, Saito-Diaz K, Neelisetty S, Ivanova A, Huffstater T, McMahon R, Taketo MM, deCaestecker M, Kasinath B, Harris RC, Lee E, Gewin LS. Tubular β-catenin and FoxO3 interactions protect in chronic kidney disease. JCI Insight 2020; 5:135454. [PMID: 32369448 DOI: 10.1172/jci.insight.135454] [Citation(s) in RCA: 17] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/03/2019] [Accepted: 04/22/2020] [Indexed: 12/18/2022] Open
Abstract
The Wnt/β-catenin signaling pathway plays an important role in renal development and is reexpressed in the injured kidney and other organs. β-Catenin signaling is protective in acute kidney injury (AKI) through actions on the proximal tubule, but the current dogma is that Wnt/β-catenin signaling promotes fibrosis and development of chronic kidney disease (CKD). As the role of proximal tubular β-catenin signaling in CKD remains unclear, we genetically stabilized (i.e., activated) β-catenin specifically in murine proximal tubules. Mice with increased tubular β-catenin signaling were protected in 2 murine models of AKI to CKD progression. Oxidative stress, a common feature of CKD, reduced the conventional T cell factor/lymphoid enhancer factor-dependent β-catenin signaling and augmented FoxO3-dependent activity in proximal tubule cells in vitro and in vivo. The protective effect of proximal tubular β-catenin in renal injury required the presence of FoxO3 in vivo. Furthermore, we identified cystathionine γ-lyase as a potentially novel transcriptional target of β-catenin/FoxO3 interactions in the proximal tubule. Thus, our studies overturned the conventional dogma about β-catenin signaling and CKD by showing a protective effect of proximal tubule β-catenin in CKD and identified a potentially new transcriptional target of β-catenin/FoxO3 signaling that has therapeutic potential for CKD.
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Affiliation(s)
- Stellor Nlandu-Khodo
- Division of Nephrology and Hypertension, Department of Medicine, Vanderbilt University Medical Center (VUMC), Nashville, Tennessee, USA.,Institute of Physiology, University of Zurich, Zurich, Switzerland
| | - Yosuke Osaki
- Division of Nephrology and Hypertension, Department of Medicine, Vanderbilt University Medical Center (VUMC), Nashville, Tennessee, USA
| | - Lauren Scarfe
- Division of Nephrology and Hypertension, Department of Medicine, Vanderbilt University Medical Center (VUMC), Nashville, Tennessee, USA
| | - Haichun Yang
- Department of Pathology, Microbiology and Immunology, VUMC, Nashville, Tennessee, USA
| | - Melanie Phillips-Mignemi
- Division of Nephrology and Hypertension, Department of Medicine, Vanderbilt University Medical Center (VUMC), Nashville, Tennessee, USA
| | - Jane Tonello
- Division of Nephrology and Hypertension, Department of Medicine, Vanderbilt University Medical Center (VUMC), Nashville, Tennessee, USA
| | | | - Surekha Neelisetty
- Division of Nephrology and Hypertension, Department of Medicine, Vanderbilt University Medical Center (VUMC), Nashville, Tennessee, USA
| | - Alla Ivanova
- Division of Nephrology and Hypertension, Department of Medicine, Vanderbilt University Medical Center (VUMC), Nashville, Tennessee, USA
| | - Tessa Huffstater
- Department of Biomedical Engineering, Vanderbilt University, Nashville, Tennessee, USA
| | - Robert McMahon
- Division of Nephrology and Hypertension, Department of Medicine, Vanderbilt University Medical Center (VUMC), Nashville, Tennessee, USA
| | - M Mark Taketo
- Division of Experimental Therapeutics, Graduate School of Medicine, Kyoto University, Kyoto, Japan
| | - Mark deCaestecker
- Division of Nephrology and Hypertension, Department of Medicine, Vanderbilt University Medical Center (VUMC), Nashville, Tennessee, USA
| | - Balakuntalam Kasinath
- Department of Medicine, Long School of Medicine, University of Texas Health San Antonio, San Antonio, Texas, USA
| | - Raymond C Harris
- Division of Nephrology and Hypertension, Department of Medicine, Vanderbilt University Medical Center (VUMC), Nashville, Tennessee, USA.,Department of Molecular Physiology and Biophysics, Vanderbilt University, Nashville, Tennessee, USA.,Department of Medicine, Veterans Affairs Hospital, Tennessee Valley Healthcare System, Nashville, Tennessee, USA
| | - Ethan Lee
- Department of Cell and Developmental Biology and
| | - Leslie S Gewin
- Division of Nephrology and Hypertension, Department of Medicine, Vanderbilt University Medical Center (VUMC), Nashville, Tennessee, USA.,Department of Cell and Developmental Biology and.,Department of Medicine, Veterans Affairs Hospital, Tennessee Valley Healthcare System, Nashville, Tennessee, USA
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12
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Li M, Guo Y, Feng YM, Zhang N. Identification of Triple-Negative Breast Cancer Genes and a Novel High-Risk Breast Cancer Prediction Model Development Based on PPI Data and Support Vector Machines. Front Genet 2019; 10:180. [PMID: 30930932 PMCID: PMC6428707 DOI: 10.3389/fgene.2019.00180] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/31/2018] [Accepted: 02/19/2019] [Indexed: 12/20/2022] Open
Abstract
Triple-negative breast cancer (TNBC) is a special subtype of breast cancer that is difficult to treat. It is crucial to identify breast cancer-related genes that could provide new biomarkers for breast cancer diagnosis and potential treatment goals. In the development of our new high-risk breast cancer prediction model, seven raw gene expression datasets from the NCBI gene expression omnibus (GEO) database (GSE31519, GSE9574, GSE20194, GSE20271, GSE32646, GSE45255, and GSE15852) were used. Using the maximum relevance minimum redundancy (mRMR) method, we selected significant genes. Then, we mapped transcripts of the genes on the protein-protein interaction (PPI) network from the Search Tool for the Retrieval of Interacting Genes (STRING) database, as well as traced the shortest path between each pair of proteins. Genes with higher betweenness values were selected from the shortest path proteins. In order to ensure validity and precision, a permutation test was performed. We randomly selected 248 proteins from the PPI network for shortest path tracing and repeated the procedure 100 times. We also removed genes that appeared more frequently in randomized results. As a result, 54 genes were selected as potential TNBC-related genes. Using 14 out the 54 genes, which are potential TNBC associated genes, as input features into a support vector machine (SVM), a novel model was trained to predict high-risk breast cancer. The prediction accuracy of normal tissues and TNBC tissues reached 95.394%, and the predictions of Stage II and Stage III TNBC reached 86.598%, indicating that such genes play important roles in distinguishing breast cancers, and that the method could be promising in practical use. According to reports, some of the 54 genes we identified from the PPI network are associated with breast cancer in the literature. Several other genes have not yet been reported but have functional resemblance with known cancer genes. These may be novel breast cancer-related genes and need further experimental validation. Gene ontology (GO) enrichment and Kyoto Encyclopedia of Genes and Genomes (KEGG) enrichment analyses were performed to appraise the 54 genes. It was indicated that cellular response to organic cyclic compounds has an influence in breast cancer, and most genes may be related with viral carcinogenesis.
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Affiliation(s)
- Ming Li
- Department of Biomedical Engineering, Tianjin Key Lab of BME Measurement, Tianjin University, Tianjin, China
| | - Yu Guo
- Department of Biomedical Engineering, Tianjin Key Lab of BME Measurement, Tianjin University, Tianjin, China
| | - Yuan-Ming Feng
- Department of Biomedical Engineering, Tianjin Key Lab of BME Measurement, Tianjin University, Tianjin, China
- Department of Radiation Oncology, Tianjin Medical University Cancer Institute and Hospital, Tianjin, China
| | - Ning Zhang
- Department of Biomedical Engineering, Tianjin Key Lab of BME Measurement, Tianjin University, Tianjin, China
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13
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Papakrivopoulou E, Vasilopoulou E, Lindenmeyer MT, Pacheco S, Brzóska HŁ, Price KL, Kolatsi‐Joannou M, White KE, Henderson DJ, Dean CH, Cohen CD, Salama AD, Woolf AS, Long DA. Vangl2, a planar cell polarity molecule, is implicated in irreversible and reversible kidney glomerular injury. J Pathol 2018; 246:485-496. [PMID: 30125361 PMCID: PMC6282744 DOI: 10.1002/path.5158] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/25/2018] [Revised: 08/02/2018] [Accepted: 08/10/2018] [Indexed: 12/11/2022]
Abstract
Planar cell polarity (PCP) pathways control the orientation and alignment of epithelial cells within tissues. Van Gogh-like 2 (Vangl2) is a key PCP protein that is required for the normal differentiation of kidney glomeruli and tubules. Vangl2 has also been implicated in modifying the course of acquired glomerular disease, and here, we further explored how Vangl2 impacts on glomerular pathobiology in this context. Targeted genetic deletion of Vangl2 in mouse glomerular epithelial podocytes enhanced the severity of not only irreversible accelerated nephrotoxic nephritis but also lipopolysaccharide-induced reversible glomerular damage. In each proteinuric model, genetic deletion of Vangl2 in podocytes was associated with an increased ratio of active-MMP9 to inactive MMP9, an enzyme involved in tissue remodelling. In addition, by interrogating microarray data from two cohorts of renal patients, we report increased VANGL2 transcript levels in the glomeruli of individuals with focal segmental glomerulosclerosis, suggesting that the molecule may also be involved in certain human glomerular diseases. These observations support the conclusion that Vangl2 modulates glomerular injury, at least in part by acting as a brake on MMP9, a potentially harmful endogenous enzyme. © 2018 The Authors. The Journal of Pathology published by John Wiley & Sons Ltd on behalf of Pathological Society of Great Britain and Ireland.
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MESH Headings
- Adult
- Animals
- Case-Control Studies
- Cell Polarity
- Cells, Cultured
- Disease Models, Animal
- Enzyme Activation
- Female
- Glomerulosclerosis, Focal Segmental/genetics
- Glomerulosclerosis, Focal Segmental/metabolism
- Glomerulosclerosis, Focal Segmental/pathology
- Glomerulosclerosis, Focal Segmental/physiopathology
- Humans
- Intracellular Signaling Peptides and Proteins/genetics
- Intracellular Signaling Peptides and Proteins/metabolism
- Kidney Glomerulus/metabolism
- Kidney Glomerulus/pathology
- Kidney Glomerulus/physiopathology
- Male
- Matrix Metalloproteinase 9/metabolism
- Membrane Proteins/genetics
- Membrane Proteins/metabolism
- Mice, Inbred C57BL
- Mice, Knockout
- Middle Aged
- Nephrosis, Lipoid/genetics
- Nephrosis, Lipoid/metabolism
- Nephrosis, Lipoid/pathology
- Nephrosis, Lipoid/physiopathology
- Nerve Tissue Proteins/deficiency
- Nerve Tissue Proteins/genetics
- Nerve Tissue Proteins/metabolism
- Podocytes/metabolism
- Podocytes/pathology
- Signal Transduction
- Young Adult
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Affiliation(s)
- Eugenia Papakrivopoulou
- Developmental Biology and Cancer ProgrammeUCL Great Ormond Street Institute of Child HealthLondonUK
| | - Elisavet Vasilopoulou
- Developmental Biology and Cancer ProgrammeUCL Great Ormond Street Institute of Child HealthLondonUK
- Medway School of PharmacyUniversity of KentChatham MaritimeUK
| | - Maja T Lindenmeyer
- Nephrological Center, Medical Clinic and Policlinic IVUniversity of MunichMunichGermany
- Department of MedicineUniversity Medical Center Hamburg‐EppendorfHamburgGermany
| | - Sabrina Pacheco
- Developmental Biology and Cancer ProgrammeUCL Great Ormond Street Institute of Child HealthLondonUK
| | - Hortensja Ł Brzóska
- Developmental Biology and Cancer ProgrammeUCL Great Ormond Street Institute of Child HealthLondonUK
| | - Karen L Price
- Developmental Biology and Cancer ProgrammeUCL Great Ormond Street Institute of Child HealthLondonUK
| | - Maria Kolatsi‐Joannou
- Developmental Biology and Cancer ProgrammeUCL Great Ormond Street Institute of Child HealthLondonUK
| | - Kathryn E White
- Electron Microscopy Research ServicesNewcastle UniversityNewcastle upon TyneUK
| | - Deborah J Henderson
- Cardiovascular Research CentreInstitute of Genetic Medicine, Newcastle UniversityNewcastle upon TyneUK
| | - Charlotte H Dean
- Inflammation Repair and Development SectionNational Heart and Lung Institute, Imperial College LondonLondonUK
| | - Clemens D Cohen
- Nephrological Center, Medical Clinic and Policlinic IVUniversity of MunichMunichGermany
| | - Alan D Salama
- University College London Centre for Nephrology, Royal Free HospitalLondonUK
| | - Adrian S Woolf
- Faculty of Biology Medicine and HealthSchool of Biological Sciences, University of ManchesterManchesterUK
- Royal Manchester Children's Hospital, Manchester University NHS Foundation Trust, Manchester Academic Health Science CentreManchesterUK
| | - David A Long
- Developmental Biology and Cancer ProgrammeUCL Great Ormond Street Institute of Child HealthLondonUK
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14
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SOCS2 overexpression alleviates diabetic nephropathy in rats by inhibiting the TLR4/NF-κB pathway. Oncotarget 2017; 8:91185-91198. [PMID: 29207635 PMCID: PMC5710915 DOI: 10.18632/oncotarget.20434] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/08/2016] [Accepted: 07/18/2017] [Indexed: 01/18/2023] Open
Abstract
Suppressor of cytokine signaling 2 (SOCS2) was reported to be involved in the development of Diabetic Nephropathy (DN). However, its underlying mechanism remains undefined. Western blot was carried out to determine the expressions of SOCS2, Toll-like receptors 4 (TLR4) and nuclear factor kappa B (NF-κB) pathway-related proteins in DN patients, streptozotocin (STZ)-induced DN rats and high glucose (HG)-stimulated podocytes. The effects of SOCS2 overexpression on renal injury, the inflammatory cytokines production, renal pathological changes, apoptosis and the TLR4/NF-κB pathway in DN rats or HG-stimulated podocytes were investigated. TLR4 antagonist TAK-242 and NF-κB inhibitor PDTC were used to confirm the functional mechanism of SOCS2 overexpression in HG-stimulated podocytes. SOCS2 was down-regulated, while TLR4 and NF-κB were up-regulated in renal tissues of DN patients and DN rats. Ad-SOCS2 infection alleviated STZ-induced renal injury and pathological changes and inhibited STZ-induced IL-6, IL-1β and MCP-1 generation and activation of the TLR4/NF-κB pathway in DN rats. SOCS2 overexpression attenuated apoptosis, suppressed the inflammatory cytokines expression, and inactivated the TLR4/NF-κB pathway in HG-stimulated podocytes. Suppression of the TLR4/NF-κB pathway enhanced the inhibitory effect of SOCS2 overexpression on apoptosis and inflammatory cytokines expressions in HG-stimulated podocytes. SOCS2 overexpression alleviated the development of DN by inhibiting the TLR4/NF-κB pathway, contributing to developing new therapeutic strategies against DN.
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15
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Raish M, Ahmad A, Jan BL, Alkharfy KM, Mohsin K, Ahamad SR, Ansari MA. GC-MS-based Metabolomic Profiling of Thymoquinone in Streptozotocin-induced Diabetic Nephropathy in Rats. Nat Prod Commun 2017. [DOI: 10.1177/1934578x1701200423] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022] Open
Abstract
Diabetic nephropathy is a common complication of diabetes mellitus and one of the major etiologies of end-stage renal disease. Specific therapeutic interventions are necessary to treat such complications. The present study was designed to investigate the metabolomic changes induced by thymoquinone for the treatment of diabetic nephropathy, using a rodent model. Rats were divided into three different groups (n = 6 each): control, diabetic, and thymoquinone-treated diabetic groups. Metabolites in serum samples were analyzed via gas chromatography-mass spectrometry. Multiple changes were observed, including those related to the metabolism of amino acids and fatty acids. The correlation analysis suggested that treatment with thymoquinone led to the reversal of diabetic nephropathy that was associated with modulations in the metabolism and proteolysis of amino acids, fatty acids, glycerol phospholipids, and organic acids. In addition, we explored the mechanisms linking the metabolic profiling of diabetic nephropathy, with a particular emphasis on the potential roles of increased reactive oxygen species production and mitochondrial dysfunctions. Our findings demonstrated that metabolomic profiling provided significant insights into the basic mechanisms of diabetic nephropathy and the therapeutic effects of thymoquinone.
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Affiliation(s)
- Mohammad Raish
- Department of Pharmaceutics, College of Pharmacy, King Saud University, Riyadh, 11451, Saudi Arabia
| | - Ajaz Ahmad
- Department of Clinical Pharmacy, College of Pharmacy, King Saud University, Riyadh, 11451, Saudi Arabia
| | - Basit L. Jan
- Department of Clinical Pharmacy, College of Pharmacy, King Saud University, Riyadh, 11451, Saudi Arabia
| | - Khalid M. Alkharfy
- Department of Clinical Pharmacy, College of Pharmacy, King Saud University, Riyadh, 11451, Saudi Arabia
| | - Kazi Mohsin
- Department of Pharmaceutics, College of Pharmacy, King Saud University, Riyadh, 11451, Saudi Arabia
| | - Syed Rizwan Ahamad
- Research Centre, College of Pharmacy, King Saud University, Riyadh, 11451, Saudi Arabia
| | - Mushtaq Ahmad Ansari
- Department of Pharmacology, College of Pharmacy, King Saud University, Riyadh, 11451, Saudi Arabia
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16
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Epithelial but not stromal expression of collagen alpha-1(III) is a diagnostic and prognostic indicator of colorectal carcinoma. Oncotarget 2017; 7:8823-38. [PMID: 26741506 PMCID: PMC4891007 DOI: 10.18632/oncotarget.6815] [Citation(s) in RCA: 33] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/30/2015] [Accepted: 12/12/2015] [Indexed: 12/20/2022] Open
Abstract
Colorectal cancer (CRC) is the third most common cancer in males and the second in females worldwide with very poor prognosis. Collagen alpha-1(III) (COL3A1) gene, encoding an extracellular matrix protein, is upregulated in human cancers. Here, we revealed that COL3A1 was increased in CRC by analysis of five Oncomine gene expression datasets (n = 496). Immunohistochemistry analysis of a tissue microarray (n = 90) demonstrated that cancer epithelial but not stromal COL3A1 was significantly upregulated comparing with the normal counterparts. High COL3A1 mRNA and/or protein expression was accompanied with high stage, T stage, Dukes stage, grade and older age, as well as smoking and recurrence status. Upregulated COL3A1 predicted poor overall (p = 0.003) and disease-free (p = 0.025) survival. Increased epithelial but not stromal COL3A1 protein predicted worse outcome (p = 0.03). Older patients (age>65) with high COL3A1 had worse survival than younger (age≤65) with high COL3A1. Plasma COL3A1 was increased in CRC patients (n = 86) by 5.4 fold comparing with healthy individuals, enteritis and polyps patients. Plasma COL3A1 had an area under curve (AUC) of 0.92 and the best sensitivity/specificity of 98.8%/69.1%. While plasma CEA had a poorer prediction power (AUC = 0.791, sensitivity/selectivity = 70.2%/73.0%). Older patients (age≥60) had higher plasma COL3A1 than younger patients. The epithelial COL3A1 protein had an AUC of 0.975 and the best sensitivity/specificity of 95.2%/91.1%. Silencing of COL3A1 suppressed CRC cell proliferation in in vitro MTT assay and in in vivo Zebra fish xenograft model by downregulation of PI3K/AKT and WNT signaling. COL3A1 was a novel diagnosis and prognosis marker of CRC.
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17
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Beaton H, Andrews D, Parsons M, Murphy M, Gaffney A, Kavanagh D, McKay GJ, Maxwell AP, Taylor CT, Cummins EP, Godson C, Higgins DF, Murphy P, Crean J. Wnt6 regulates epithelial cell differentiation and is dysregulated in renal fibrosis. Am J Physiol Renal Physiol 2016; 311:F35-45. [PMID: 27122540 DOI: 10.1152/ajprenal.00136.2016] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/08/2016] [Accepted: 04/22/2016] [Indexed: 02/07/2023] Open
Abstract
Diabetic nephropathy is the most common microvascular complication of diabetes mellitus, manifesting as mesangial expansion, glomerular basement membrane thickening, glomerular sclerosis, and progressive tubulointerstitial fibrosis leading to end-stage renal disease. Here we describe the functional characterization of Wnt6, whose expression is progressively lost in diabetic nephropathy and animal models of acute tubular injury and renal fibrosis. We have shown prominent Wnt6 and frizzled 7 (FzD7) expression in the mesonephros of the developing mouse kidney, suggesting a role for Wnt6 in epithelialization. Importantly, TCF/Lef reporter activity is also prominent in the mesonephros. Analysis of Wnt family members in human renal biopsies identified differential expression of Wnt6, correlating with severity of the disease. In animal models of tubular injury and fibrosis, loss of Wnt6 was evident. Wnt6 signals through the canonical pathway in renal epithelial cells as evidenced by increased phosphorylation of GSK3β (Ser9), nuclear accumulation of β-catenin and increased TCF/Lef transcriptional activity. FzD7 was identified as a putative receptor of Wnt6. In vitro Wnt6 expression leads to de novo tubulogenesis in renal epithelial cells grown in three-dimensional culture. Importantly, Wnt6 rescued epithelial cell dedifferentiation in response to transforming growth factor-β (TGF-β); Wnt6 reversed TGF-β-mediated increases in vimentin and loss of epithelial phenotype. Wnt6 inhibited TGF-β-mediated p65-NF-κB nuclear translocation, highlighting cross talk between the two pathways. The critical role of NF-κB in the regulation of vimentin expression was confirmed in both p65(-/-) and IKKα/β(-/-) embryonic fibroblasts. We propose that Wnt6 is involved in epithelialization and loss of Wnt6 expression contributes to the pathogenesis of renal fibrosis.
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Affiliation(s)
- Hayley Beaton
- Diabetes Complications Research Centre, Conway Institute of Biomolecular and Biomedical Research, UCD School of Biomolecular and Biomedical Science, Belfield, Dublin, Ireland
| | - Darrell Andrews
- Diabetes Complications Research Centre, Conway Institute of Biomolecular and Biomedical Research, UCD School of Biomolecular and Biomedical Science, Belfield, Dublin, Ireland
| | - Martin Parsons
- Diabetes Complications Research Centre, Conway Institute of Biomolecular and Biomedical Research, UCD School of Biomolecular and Biomedical Science, Belfield, Dublin, Ireland
| | - Mary Murphy
- Diabetes Complications Research Centre, Conway Institute of Biomolecular and Biomedical Research, UCD School of Biomolecular and Biomedical Science, Belfield, Dublin, Ireland
| | - Andrew Gaffney
- UCD School of Medicine and Medical Science, University College Dublin, Belfield, Dublin, Ireland
| | - David Kavanagh
- Nephrology Research Group, Centre for Public Health, Queens University Belfast, Royal Victoria Hospital, Belfast, United Kingdom; and
| | - Gareth J McKay
- Nephrology Research Group, Centre for Public Health, Queens University Belfast, Royal Victoria Hospital, Belfast, United Kingdom; and
| | - Alexander P Maxwell
- Nephrology Research Group, Centre for Public Health, Queens University Belfast, Royal Victoria Hospital, Belfast, United Kingdom; and
| | - Cormac T Taylor
- UCD School of Medicine and Medical Science, University College Dublin, Belfield, Dublin, Ireland
| | - Eoin P Cummins
- UCD School of Medicine and Medical Science, University College Dublin, Belfield, Dublin, Ireland
| | - Catherine Godson
- UCD School of Medicine and Medical Science, University College Dublin, Belfield, Dublin, Ireland
| | - Debra F Higgins
- UCD School of Medicine and Medical Science, University College Dublin, Belfield, Dublin, Ireland
| | - Paula Murphy
- Zoology Department, School of Natural Sciences, Trinity College Dublin, Dublin, Ireland
| | - John Crean
- Diabetes Complications Research Centre, Conway Institute of Biomolecular and Biomedical Research, UCD School of Biomolecular and Biomedical Science, Belfield, Dublin, Ireland;
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18
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Yu C, Wales SQ, Mammel MK, Hida K, Kulka M. Optimizing a custom tiling microarray for low input detection and identification of unamplified virus targets. J Virol Methods 2016; 234:54-64. [PMID: 27033182 DOI: 10.1016/j.jviromet.2016.03.013] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/24/2015] [Revised: 03/04/2016] [Accepted: 03/14/2016] [Indexed: 12/31/2022]
Abstract
Viruses are major pathogens causing foodborne illnesses and are often present at low levels in foods, thus requiring sensitive techniques for their detection in contaminated foods. The lack of efficient culture methods for many foodborne viruses and the potential for multi-species viral contamination have driven investigation toward non-amplification based methods for virus detection and identification. A custom DNA microarray (FDA_EVIR) was assessed for its sensitivity in the detection and identification of low-input virus targets, human hepatitis A virus, norovirus, and coxsackievirus, individually and in combination. Modifications to sample processing were made to accommodate low input levels of unamplified virus targets, which included addition of carrier cDNA, RNase treatment, and optimization of DNase I-mediated target fragmentation. Amplification-free detection and identification of foodborne viruses were achieved in the range of 250-500 copies of virus RNA. Alternative data analysis methods were employed to distinguish the genotypes of the viruses particularly at lower levels of target input and the single probe-based analysis approach made it possible to identify a minority species in a multi-virus complex. The oligonucleotide array is shown to be a promising platform to detect foodborne viruses at low levels close to what are anticipated in food or environmental samples.
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Affiliation(s)
- Christine Yu
- Division of Molecular Biology, Office of Applied Research and Safety Assessment, Center for Food Safety and Applied Nutrition, U.S. Food and Drug Administration, 8301 Muirkirk Road, Laurel, MD 20708, USA
| | - Samantha Q Wales
- Division of Molecular Biology, Office of Applied Research and Safety Assessment, Center for Food Safety and Applied Nutrition, U.S. Food and Drug Administration, 8301 Muirkirk Road, Laurel, MD 20708, USA
| | - Mark K Mammel
- Division of Molecular Biology, Office of Applied Research and Safety Assessment, Center for Food Safety and Applied Nutrition, U.S. Food and Drug Administration, 8301 Muirkirk Road, Laurel, MD 20708, USA
| | - Kaoru Hida
- Division of Molecular Biology, Office of Applied Research and Safety Assessment, Center for Food Safety and Applied Nutrition, U.S. Food and Drug Administration, 8301 Muirkirk Road, Laurel, MD 20708, USA
| | - Michael Kulka
- Division of Molecular Biology, Office of Applied Research and Safety Assessment, Center for Food Safety and Applied Nutrition, U.S. Food and Drug Administration, 8301 Muirkirk Road, Laurel, MD 20708, USA.
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19
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Heinzel A, Mühlberger I, Stelzer G, Lancet D, Oberbauer R, Martin M, Perco P. Molecular disease presentation in diabetic nephropathy. Nephrol Dial Transplant 2016. [PMID: 26209734 DOI: 10.1093/ndt/gfv267] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/15/2023] Open
Abstract
Diabetic nephropathy, as the most prevalent chronic disease of the kidney, has also become the primary cause of end-stage renal disease with the incidence of kidney disease in type 2 diabetics continuously rising. As with most chronic diseases, the pathophysiology is multifactorial with a number of deregulated molecular processes contributing to disease manifestation and progression. Current therapy mainly involves interfering in the renin-angiotensin-aldosterone system using angiotensin-converting enzyme inhibitors or angiotensin-receptor blockers. Better understanding of molecular processes deregulated in the early stages and progression of disease hold the key for development of novel therapeutics addressing this complex disease. With the advent of high-throughput omics technologies, researchers set out to systematically study the disease on a molecular level. Results of the first omics studies were mainly focused on reporting the highest deregulated molecules between diseased and healthy subjects with recent attempts to integrate findings of multiple studies on the level of molecular pathways and processes. In this review, we will outline key omics studies on the genome, transcriptome, proteome and metabolome level in the context of DN. We will also provide concepts on how to integrate findings of these individual studies (i) on the level of functional processes using the gene-ontology vocabulary, (ii) on the level of molecular pathways and (iii) on the level of phenotype molecular models constructed based on protein-protein interaction data.
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Affiliation(s)
| | | | - Gil Stelzer
- Weizmann Institute of Science, Rehovot, Israel
| | | | | | - Maria Martin
- EMBL-EBI, Wellcome Trust Genome Campus, Hinxton, UK
| | - Paul Perco
- emergentec biodevelopment GmbH, Vienna, Austria
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20
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Djudjaj S, Papasotiriou M, Bülow RD, Wagnerova A, Lindenmeyer MT, Cohen CD, Strnad P, Goumenos DS, Floege J, Boor P. Keratins are novel markers of renal epithelial cell injury. Kidney Int 2016; 89:792-808. [PMID: 26924053 DOI: 10.1016/j.kint.2015.10.015] [Citation(s) in RCA: 63] [Impact Index Per Article: 7.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/09/2015] [Revised: 09/25/2015] [Accepted: 10/22/2015] [Indexed: 12/14/2022]
Abstract
Keratins, the intermediate filaments of the epithelial cell cytoskeleton, are up-regulated and post-translationally modified in stress situations. Renal tubular epithelial cell stress is a common finding in progressive kidney diseases, but little is known about keratin expression and phosphorylation. Here, we comprehensively describe keratin expression in healthy and diseased kidneys. In healthy mice, the major renal keratins, K7, K8, K18, and K19, were expressed in the collecting ducts and K8, K18 in the glomerular parietal epithelial cells. Tubular expression of all 4 keratins increased by 20- to 40-fold in 5 different models of renal tubular injury as assessed by immunohistochemistry, Western blot, and quantitative reverse transcriptase polymerase chain reaction (qRT-PCR). The up-regulation became significant early after disease induction, increased with disease progression, was found de novo in distal tubules and was accompanied by altered subcellular localization. Phosphorylation of K8 and K18 increased under stress. In humans, injured tubules also exhibited increased keratin expression. Urinary K18 was only detected in mice and patients with tubular cell injury. Keratins labeled glomerular parietal epithelial cells forming crescents in patients and animals. Thus, all 4 major renal keratins are significantly, early, and progressively up-regulated upon tubular injury regardless of the underlying disease and may be novel sensitive markers of renal tubular cell stress.
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Affiliation(s)
- Sonja Djudjaj
- Division of Nephrology, Rheinisch-Westfälische Technische Hochschule Aachen, Aachen, Germany; Institute of Pathology, Rheinisch-Westfälische Technische Hochschule Aachen, Aachen, Germany
| | - Marios Papasotiriou
- Division of Nephrology, Rheinisch-Westfälische Technische Hochschule Aachen, Aachen, Germany; Department of Nephrology, University Hospital of Patras, Patras, Greece
| | - Roman D Bülow
- Institute of Pathology, Rheinisch-Westfälische Technische Hochschule Aachen, Aachen, Germany
| | - Alexandra Wagnerova
- Institute of Pathology, Rheinisch-Westfälische Technische Hochschule Aachen, Aachen, Germany; Institute of Molecular Biomedicine, Comenius University, Bratislava, Slovakia
| | - Maja T Lindenmeyer
- Division of Nephrology and Institute of Physiology, University Zürich, Zürich, Switzerland
| | - Clemens D Cohen
- Division of Nephrology and Institute of Physiology, University Zürich, Zürich, Switzerland
| | - Pavel Strnad
- Department of Internal Medicine 3 and Interdisziplinäres Zentrum für Klinische Forschung, Rheinisch-Westfälische Technische Hochschule Aachen, Aachen, Germany
| | | | - Jürgen Floege
- Division of Nephrology, Rheinisch-Westfälische Technische Hochschule Aachen, Aachen, Germany
| | - Peter Boor
- Division of Nephrology, Rheinisch-Westfälische Technische Hochschule Aachen, Aachen, Germany; Institute of Pathology, Rheinisch-Westfälische Technische Hochschule Aachen, Aachen, Germany; Institute of Molecular Biomedicine, Comenius University, Bratislava, Slovakia.
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21
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Seleznik G, Seeger H, Bauer J, Fu K, Czerkowicz J, Papandile A, Poreci U, Rabah D, Ranger A, Cohen CD, Lindenmeyer M, Chen J, Edenhofer I, Anders HJ, Lech M, Wüthrich RP, Ruddle NH, Moeller MJ, Kozakowski N, Regele H, Browning JL, Heikenwalder M, Segerer S. The lymphotoxin β receptor is a potential therapeutic target in renal inflammation. Kidney Int 2016; 89:113-26. [PMID: 26398497 DOI: 10.1038/ki.2015.280] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/22/2014] [Revised: 07/14/2015] [Accepted: 07/16/2015] [Indexed: 02/07/2023]
Abstract
Accumulation of inflammatory cells in different renal compartments is a hallmark of progressive kidney diseases including glomerulonephritis (GN). Lymphotoxin β receptor (LTβR) signaling is crucial for the formation of lymphoid tissue, and inhibition of LTβR signaling has ameliorated several non-renal inflammatory models. Therefore, we tested whether LTβR signaling could also have a role in renal injury. Renal biopsies from patients with GN were found to express both LTα and LTβ ligands, as well as LTβR. The LTβR protein and mRNA were localized to tubular epithelial cells, parietal epithelial cells, crescents, and cells of the glomerular tuft, whereas LTβ was found on lymphocytes and tubular epithelial cells. Human tubular epithelial cells, mesangial cells, and mouse parietal epithelial cells expressed both LTα and LTβ mRNA upon stimulation with TNF in vitro. Several chemokine mRNAs and proteins were expressed in response to LTβR signaling. Importantly, in a murine lupus model, LTβR blockade improved renal function without the reduction of serum autoantibody titers or glomerular immune complex deposition. Thus, a preclinical mouse model and human studies strongly suggest that LTβR signaling is involved in renal injury and may be a suitable therapeutic target in renal diseases.
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Affiliation(s)
- Gitta Seleznik
- Division of Visceral & Transplantation Surgery, Swiss Hepato-Pancreato-Biliary Center, Zurich, Switzerland; Division of Nephrology, University Hospital, Zurich, Switzerland
| | - Harald Seeger
- Division of Nephrology, University Hospital, Zurich, Switzerland; Institute of Physiology and Zurich Center for Integrative Human Physiology (ZIHP), University of Zurich, Zurich, Switzerland
| | - Judith Bauer
- Institute of Virology, Technische Universität München, Helmholz Zentrum, Munich, Germany
| | - Kai Fu
- Department of Immunobiology, Biogen, Cambridge, Massachusetts, USA
| | - Julie Czerkowicz
- Department of Immunobiology, Biogen, Cambridge, Massachusetts, USA
| | - Adrian Papandile
- Department of Immunobiology, Biogen, Cambridge, Massachusetts, USA
| | - Uriana Poreci
- Department of Immunobiology, Biogen, Cambridge, Massachusetts, USA
| | - Dania Rabah
- Department of Immunobiology, Biogen, Cambridge, Massachusetts, USA
| | - Ann Ranger
- Department of Immunobiology, Biogen, Cambridge, Massachusetts, USA
| | - Clemens D Cohen
- Division of Nephrology, University Hospital, Zurich, Switzerland; Institute of Physiology and Zurich Center for Integrative Human Physiology (ZIHP), University of Zurich, Zurich, Switzerland
| | - Maja Lindenmeyer
- Division of Nephrology, University Hospital, Zurich, Switzerland; Institute of Physiology and Zurich Center for Integrative Human Physiology (ZIHP), University of Zurich, Zurich, Switzerland
| | - Jin Chen
- Division of Nephrology, University Hospital, Zurich, Switzerland; Institute of Physiology and Zurich Center for Integrative Human Physiology (ZIHP), University of Zurich, Zurich, Switzerland
| | - Ilka Edenhofer
- Division of Nephrology, University Hospital, Zurich, Switzerland; Institute of Physiology and Zurich Center for Integrative Human Physiology (ZIHP), University of Zurich, Zurich, Switzerland
| | - Hans J Anders
- Division of Nephrology, Medizinische Klinik und Poliklinik IV, Campus Innenstadt, University of Munich-LMU, Munich, Germany
| | - Maciej Lech
- Division of Nephrology, Medizinische Klinik und Poliklinik IV, Campus Innenstadt, University of Munich-LMU, Munich, Germany
| | - Rudolf P Wüthrich
- Division of Nephrology, University Hospital, Zurich, Switzerland; Institute of Physiology and Zurich Center for Integrative Human Physiology (ZIHP), University of Zurich, Zurich, Switzerland
| | - Nancy H Ruddle
- Epidemiology of Microbial Diseases, School of Public Health, Yale University, New Haven, Connecticut, USA
| | - Marcus J Moeller
- Department of Nephrology and Clinical Immunology, Rheinisch-Westfälische Technische Hochschule (RWTH) University Hospital Aachen, Aachen, Germany
| | | | - Heinz Regele
- Clinical Institute of Pathology, University of Vienna, Vienna, Austria
| | - Jeffrey L Browning
- Department of Immunobiology, Biogen, Cambridge, Massachusetts, USA; Department of Microbiology and Section of Rheumatology, Boston University School of Medicine, Boston, Massachusetts, USA
| | - Mathias Heikenwalder
- Institute of Virology, Technische Universität München, Helmholz Zentrum, Munich, Germany; Institute of Surgical Pathology, University Hospital, Zurich, Switzerland
| | - Stephan Segerer
- Division of Nephrology, University Hospital, Zurich, Switzerland; Institute of Physiology and Zurich Center for Integrative Human Physiology (ZIHP), University of Zurich, Zurich, Switzerland.
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22
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Conserva F, Gesualdo L, Papale M. A Systems Biology Overview on Human Diabetic Nephropathy: From Genetic Susceptibility to Post-Transcriptional and Post-Translational Modifications. J Diabetes Res 2016; 2016:7934504. [PMID: 26798653 PMCID: PMC4698547 DOI: 10.1155/2016/7934504] [Citation(s) in RCA: 32] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/29/2015] [Revised: 08/16/2015] [Accepted: 09/10/2015] [Indexed: 12/19/2022] Open
Abstract
Diabetic nephropathy (DN), a microvascular complication occurring in approximately 20-40% of patients with type 2 diabetes mellitus (T2DM), is characterized by the progressive impairment of glomerular filtration and the development of Kimmelstiel-Wilson lesions leading to end-stage renal failure (ESRD). The causes and molecular mechanisms mediating the onset of T2DM chronic complications are yet sketchy and it is not clear why disease progression occurs only in some patients. We performed a systematic analysis of the most relevant studies investigating genetic susceptibility and specific transcriptomic, epigenetic, proteomic, and metabolomic patterns in order to summarize the most significant traits associated with the disease onset and progression. The picture that emerges is complex and fascinating as it includes the regulation/dysregulation of numerous biological processes, converging toward the activation of inflammatory processes, oxidative stress, remodeling of cellular function and morphology, and disturbance of metabolic pathways. The growing interest in the characterization of protein post-translational modifications and the importance of handling large datasets using a systems biology approach are also discussed.
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Affiliation(s)
- Francesca Conserva
- Division of Nephrology, Department of Emergency and Organ Transplantation, University of Bari, 70124 Bari, Italy
- Division of Cardiology and Cardiac Rehabilitation, “S. Maugeri” Foundation, IRCCS, Institute of Cassano Murge, 70020 Cassano delle Murge, Italy
| | - Loreto Gesualdo
- Division of Nephrology, Department of Emergency and Organ Transplantation, University of Bari, 70124 Bari, Italy
- *Loreto Gesualdo:
| | - Massimo Papale
- Molecular Medicine Center, Section of Nephrology, Department of Medical and Surgical Sciences, University of Foggia, 71122 Foggia, Italy
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23
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Tong J, Xie J, Ren H, Liu J, Zhang W, Wei C, Xu J, Zhang W, Li X, Wang W, Lv D, He JC, Chen N. Comparison of Glomerular Transcriptome Profiles of Adult-Onset Steroid Sensitive Focal Segmental Glomerulosclerosis and Minimal Change Disease. PLoS One 2015; 10:e0140453. [PMID: 26536600 PMCID: PMC4633097 DOI: 10.1371/journal.pone.0140453] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/04/2015] [Accepted: 09/25/2015] [Indexed: 01/17/2023] Open
Abstract
Objective To search for biomarkers to differentiate primary focal segmental glomerulosclerosis (FSGS) and minimal change disease (MCD). Methods We isolated glomeruli from kidney biopsies of 6 patients with adult-onset steroid sensitiveFSGS and 5 patients with MCD, and compared the profiles of glomerular transcriptomes between the two groups of patients using microarray analysis. Results Analysis of differential expressed genes (DEGs) revealed that up-regulated DEGs in FSGS patients compared with MCD patients were primarily involved in spermatogenesis, gamete generation, regulation of muscle contraction, response to unfolded protein, cell proliferation and skeletal system development. The down-regulated DEGs were primarily related to metabolic process, intracellular transport, oxidation/reduction andestablishment of intracellular localization. We validated the expression of the top 6 up-regulated and top 6 down-regulated DEGs using real-time PCR. Membrane metallo-endopeptidase (MME) is a down-regulated gene that was previously identified as a key gene for kidney development. Immunostaining confirmed that the protein expression of MME decreased significantly in FSGS kidneys compared with MCD kidneys. Conclusions This report was the first study to examine transcriptomes in Chinese patients with various glomerular diseases. Expressions of MME both in RNA and protein level decreased significantly in glomeruli of FSGS kidneys compared with MCD kidneys. Our data suggested that MME might play a role in the normal physiological function of podocytes and a decrease in MME expression might be related to podocyte injury. We also identified genes and pathways specific for FSGS versus MCD, and our data could help identify potential new biomarkers for the differential diagnosis between these two diseases.
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Affiliation(s)
- Jun Tong
- Department of Nephrology, Ruijin Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, P. R. China
| | - Jingyuan Xie
- Department of Nephrology, Ruijin Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, P. R. China.,Institute of Nephrology, Shanghai Jiao Tong University School of Medicine, Shanghai, P. R. China
| | - Hong Ren
- Department of Nephrology, Ruijin Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, P. R. China
| | - Jian Liu
- Department of Nephrology, Ruijin Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, P. R. China
| | - Weijia Zhang
- Department of Medicine, Division of Nephrology, Icahn School of Medicine at Mount Sinai, New York, New York, United States of America
| | - Chengguo Wei
- Department of Medicine, Division of Nephrology, Icahn School of Medicine at Mount Sinai, New York, New York, United States of America
| | - Jing Xu
- Department of Nephrology, Ruijin Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, P. R. China
| | - Wen Zhang
- Department of Nephrology, Ruijin Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, P. R. China
| | - Xiao Li
- Department of Nephrology, Ruijin Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, P. R. China
| | - Weiming Wang
- Department of Nephrology, Ruijin Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, P. R. China.,Institute of Nephrology, Shanghai Jiao Tong University School of Medicine, Shanghai, P. R. China
| | - Danfeng Lv
- National Center for Gene Research and Institute of Plant Physiology and Ecology, Chinese Academy of Sciences, Shanghai, P. R. China
| | - John Cijiang He
- Institute of Nephrology, Shanghai Jiao Tong University School of Medicine, Shanghai, P. R. China.,Department of Medicine, Division of Nephrology, Icahn School of Medicine at Mount Sinai, New York, New York, United States of America
| | - Nan Chen
- Department of Nephrology, Ruijin Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, P. R. China.,Institute of Nephrology, Shanghai Jiao Tong University School of Medicine, Shanghai, P. R. China
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24
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Afkarian M, Zelnick LR, Ruzinski J, Kestenbaum B, Himmelfarb J, de Boer IH, Mehrotra R. Urine matrix metalloproteinase-7 and risk of kidney disease progression and mortality in type 2 diabetes. J Diabetes Complications 2015; 29:1024-31. [PMID: 26412030 PMCID: PMC5389898 DOI: 10.1016/j.jdiacomp.2015.08.024] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/24/2015] [Revised: 08/25/2015] [Accepted: 08/30/2015] [Indexed: 02/06/2023]
Abstract
AIMS The renin-angiotensin-aldosterone system (RAAS), bone morphogenetic protein (BMP) and WNT pathways are dysregulated in diabetic kidney disease (DKD). Urine excretion of angiotensinogen, gremlin-1 and matrix metalloproteinase-7 (MMP-7), components of the RAAS, BMP and WNT pathways, respectively, is increased in DKD. We asked if this increase is associated with subsequent progression to end-stage renal disease (ESRD) or death. METHODS Using time-to-event analyses, we examined the association of baseline urine concentration of these proteins with progression to ESRD or death in a predominantly Mexican-American cohort with type 2 diabetes and proteinuric DKD (n=141). RESULTS Progression to ESRD occurred for 38 participants over a median follow-up of 3.0years; 39 participants died over a median follow-up of 3.6years. Urine MMP-7 and gremlin-1 were associated with increased risk of ESRD after adjustment for demographic and clinical covariates. Angiotensinogen showed a U-shaped relationship with ESRD, with the middle tertile associated with lowest risk of ESRD. After additional adjustment for glomerular filtration rate and albuminuria, all associations with ESRD lost significance. Only urine MMP-7 was associated with mortality, and this association remained robust in the fully adjusted model with a Hazard ratio of 3.59 (95% confidence interval 1.31 to 9.85) for highest vs. lowest tertile. Serum MMP-7 was not associated with mortality and did not attenuate the association of urine MMP-7 with mortality (HR 4.03 for highest vs. lowest urine MMP-7 tertile). CONCLUSIONS Among people with type 2 diabetes and proteinuric DKD, urine MMP-7 concentration was strongly associated with subsequent mortality.
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MESH Headings
- Aged
- Cohort Studies
- Diabetes Mellitus, Type 2/complications
- Diabetes Mellitus, Type 2/ethnology
- Diabetes Mellitus, Type 2/mortality
- Diabetes Mellitus, Type 2/urine
- Diabetic Nephropathies/complications
- Diabetic Nephropathies/epidemiology
- Diabetic Nephropathies/mortality
- Diabetic Nephropathies/physiopathology
- Disease Progression
- Female
- Follow-Up Studies
- Glomerular Filtration Rate
- Hospitals, Public
- Hospitals, Urban
- Humans
- Kidney/physiopathology
- Kidney Failure, Chronic/complications
- Kidney Failure, Chronic/epidemiology
- Kidney Failure, Chronic/mortality
- Kidney Failure, Chronic/physiopathology
- Los Angeles/epidemiology
- Male
- Matrix Metalloproteinase 7/urine
- Mexican Americans
- Middle Aged
- Prospective Studies
- Renal Insufficiency/complications
- Renal Insufficiency/epidemiology
- Renal Insufficiency/mortality
- Renal Insufficiency/physiopathology
- Risk
- Up-Regulation
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Affiliation(s)
- Maryam Afkarian
- Kidney Research Institute and Division of Nephrology, Department of Medicine, University of Washington, Seattle, WA.
| | - Leila R Zelnick
- Kidney Research Institute and Division of Nephrology, Department of Medicine, University of Washington, Seattle, WA; Department of Biostatistics, University of Washington
| | - John Ruzinski
- Kidney Research Institute and Division of Nephrology, Department of Medicine, University of Washington, Seattle, WA
| | - Bryan Kestenbaum
- Kidney Research Institute and Division of Nephrology, Department of Medicine, University of Washington, Seattle, WA
| | - Jonathan Himmelfarb
- Kidney Research Institute and Division of Nephrology, Department of Medicine, University of Washington, Seattle, WA
| | - Ian H de Boer
- Kidney Research Institute and Division of Nephrology, Department of Medicine, University of Washington, Seattle, WA
| | - Rajnish Mehrotra
- Kidney Research Institute and Division of Nephrology, Department of Medicine, University of Washington, Seattle, WA
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25
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Djudjaj S, Lue H, Rong S, Papasotiriou M, Klinkhammer BM, Zok S, Klaener O, Braun GS, Lindenmeyer MT, Cohen CD, Bucala R, Tittel AP, Kurts C, Moeller MJ, Floege J, Ostendorf T, Bernhagen J, Boor P. Macrophage Migration Inhibitory Factor Mediates Proliferative GN via CD74. J Am Soc Nephrol 2015; 27:1650-64. [PMID: 26453615 DOI: 10.1681/asn.2015020149] [Citation(s) in RCA: 44] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/10/2015] [Accepted: 08/24/2015] [Indexed: 01/09/2023] Open
Abstract
Pathologic proliferation of mesangial and parietal epithelial cells (PECs) is a hallmark of various glomerulonephritides. Macrophage migration inhibitory factor (MIF) is a pleiotropic cytokine that mediates inflammation by engagement of a receptor complex involving the components CD74, CD44, CXCR2, and CXCR4. The proliferative effects of MIF may involve CD74 together with the coreceptor and PEC activation marker CD44. Herein, we analyzed the effects of local glomerular MIF/CD74/CD44 signaling in proliferative glomerulonephritides. MIF, CD74, and CD44 were upregulated in the glomeruli of patients and mice with proliferative glomerulonephritides. During disease, CD74 and CD44 were expressed de novo in PECs and colocalized in both PECs and mesangial cells. Stress stimuli induced MIF secretion from glomerular cells in vitro and in vivo, in particular from podocytes, and MIF stimulation induced proliferation of PECs and mesangial cells via CD74. In murine crescentic GN, Mif-deficient mice were almost completely protected from glomerular injury, the development of cellular crescents, and the activation and proliferation of PECs and mesangial cells, whereas wild-type mice were not. Bone marrow reconstitution studies showed that deficiency of both nonmyeloid and bone marrow-derived Mif reduced glomerular cell proliferation and injury. In contrast to wild-type mice, Cd74-deficient mice also were protected from glomerular injury and ensuing activation and proliferation of PECs and mesangial cells. Our data suggest a novel molecular mechanism and glomerular cell crosstalk by which local upregulation of MIF and its receptor complex CD74/CD44 mediate glomerular injury and pathologic proliferation in GN.
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Affiliation(s)
- Sonja Djudjaj
- Department of Pathology, Department of Nephrology and Immunology, and
| | - Hongqi Lue
- Institute of Biochemistry and Molecular Cell Biology, RWTH Aachen University, Aachen, Germany
| | - Song Rong
- Department of Nephrology and Immunology, and
| | | | | | | | - Ole Klaener
- Department of Pathology, Department of Nephrology and Immunology, and
| | | | - Maja T Lindenmeyer
- Division of Nephrology and Institute of Physiology, University of Zürich, Zürich, Switzerland
| | - Clemens D Cohen
- Division of Nephrology and Institute of Physiology, University of Zürich, Zürich, Switzerland
| | - Richard Bucala
- Department of Internal Medicine, Yale University School of Medicine, New Haven, Connecticut
| | - Andre P Tittel
- Institute of Molecular Medicine and Experimental Immunology, University of Bonn, Bonn, Germany; and
| | - Christian Kurts
- Institute of Molecular Medicine and Experimental Immunology, University of Bonn, Bonn, Germany; and
| | | | | | | | - Jürgen Bernhagen
- Institute of Biochemistry and Molecular Cell Biology, RWTH Aachen University, Aachen, Germany;
| | - Peter Boor
- Department of Pathology, Department of Nephrology and Immunology, and Institute of Molecular Biomedicine, Comenius University, Bratislava, Slovakia
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26
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Conway BR, Betz B, Sheldrake TA, Manning JR, Dunbar DR, Dobyns A, Hughes J, Mullins JJ. Tight blood glycaemic and blood pressure control in experimental diabetic nephropathy reduces extracellular matrix production without regression of fibrosis. Nephrology (Carlton) 2015; 19:802-13. [PMID: 25196678 DOI: 10.1111/nep.12335] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 09/01/2014] [Indexed: 01/15/2023]
Abstract
AIMS Regression of albuminuria and renal fibrosis occurs in patients with diabetic nephropathy (DN) following tight control of blood glucose and blood pressure, however the pathways that promote regression remain poorly understood and we wished to characterize these using a rodent model. METHODS Diabetes was induced with streptozotocin in Cyp1a1mRen2 rats and hypertension was generated by inducing renin transgene expression with dietary indole-3-carbinol (I-3-C) for 28 weeks. At this point an 'injury cohort' was culled, while in a 'reversal cohort' glycaemia was tightly controlled using insulin implants and blood pressure normalized by withdrawing dietary I-3-C for a further 8 weeks. Pathways activated during and following reversal of diabetes and hypertension were assessed by microarray profiling. RESULTS Tight control of blood glucose and blood pressure reduced albuminuria and renal hypertrophy, but had no impact on renal fibrosis. 85 genes were up-regulated specifically during the injury phase, including genes encoding multiple myofibroblast and extracellular matrix (ECM) proteins. Conversely, 314 genes remained persistently elevated during reversal including genes linked to innate/adaptive immunity, phagocytosis, lysosomal processing and degradative metalloproteinases (MMPs). Despite increased MMP gene expression, MMP activity was suppressed during both injury and reversal, in association with up-regulation of tissue inhibitor of metalloproteinase-1 (TIMP-1) protein. Physical separation of the TIMP-1/MMP complexes during zymography of tissue homogenate restored MMP activity. CONCLUSION Normalization of blood glucose and pressure ameliorates albuminuria and inhibits excess ECM production, however persistent TIMP-1 expression hinders attempts at ECM remodelling. Therapies which counteract the action of TIMPs may accelerate scar resolution.
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Affiliation(s)
- Bryan R Conway
- Centre for Cardiovascular Science, British Heart Foundation/University of Edinburgh, Edinburgh, UK
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27
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Sugano Y, Lindenmeyer MT, Auberger I, Ziegler U, Segerer S, Cohen CD, Neuhauss SCF, Loffing J. The Rho-GTPase binding protein IQGAP2 is required for the glomerular filtration barrier. Kidney Int 2015; 88:1047-56. [PMID: 26154927 DOI: 10.1038/ki.2015.197] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/11/2014] [Revised: 04/27/2015] [Accepted: 05/07/2015] [Indexed: 01/09/2023]
Abstract
Podocyte dysfunction impairs the size selectivity of the glomerular filter, leading to proteinuria, hypoalbuminuria, and edema, clinically defined as nephrotic syndrome. Hereditary forms of nephrotic syndrome are linked to mutations in podocyte-specific genes. To identify genes contributing to podocyte dysfunction in acquired nephrotic syndrome, we studied human glomerular gene expression data sets for glomerular-enriched gene transcripts differentially regulated between pretransplant biopsy samples and biopsies from patients with nephrotic syndrome. Candidate genes were screened by in situ hybridization for expression in the zebrafish pronephros, an easy-to-use in vivo assay system to assess podocyte function. One glomerulus-enriched product was the Rho-GTPase binding protein, IQGAP2. Immunohistochemistry found a strong presence of IQGAP2 in normal human and zebrafish podocytes. In zebrafish larvae, morpholino-based knockdown of iqgap2 caused a mild foot process effacement of zebrafish podocytes and a cystic dilation of the urinary space of Bowman's capsule upon onset of urinary filtration. Moreover, the glomerulus of zebrafish morphants showed a glomerular permeability for injected high-molecular-weight dextrans, indicating an impaired size selectivity of the glomerular filter. Thus, IQGAP2 is a Rho-GTPase binding protein, highly abundant in human and zebrafish podocytes, which controls normal podocyte structure and function as evidenced in the zebrafish pronephros.
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Affiliation(s)
- Yuya Sugano
- Zurich Center for Integrative Human Physiology, University of Zurich, Zurich, Switzerland.,Institute of Anatomy, University of Zurich, Zurich, Switzerland.,Institute of Molecular Life Sciences, University of Zurich, Zurich, Switzerland
| | | | - Ines Auberger
- Zurich Center for Integrative Human Physiology, University of Zurich, Zurich, Switzerland.,Institute of Physiology, University of Zurich, Zurich, Switzerland
| | - Urs Ziegler
- Zurich Center for Integrative Human Physiology, University of Zurich, Zurich, Switzerland.,Center for Microscopy and Image Analysis, University of Zurich, Zurich, Switzerland
| | - Stephan Segerer
- Institute of Physiology, University of Zurich, Zurich, Switzerland.,Division of Nephrology, University Hospital, Zurich, Switzerland
| | - Clemens D Cohen
- Zurich Center for Integrative Human Physiology, University of Zurich, Zurich, Switzerland.,Institute of Physiology, University of Zurich, Zurich, Switzerland.,Division of Nephrology, Klinikum Harlaching, Munich, Germany
| | - Stephan C F Neuhauss
- Zurich Center for Integrative Human Physiology, University of Zurich, Zurich, Switzerland.,Institute of Molecular Life Sciences, University of Zurich, Zurich, Switzerland
| | - Johannes Loffing
- Zurich Center for Integrative Human Physiology, University of Zurich, Zurich, Switzerland.,Institute of Anatomy, University of Zurich, Zurich, Switzerland
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28
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Zhao T, Zhang H, Zhang X, Zhao T, Lan HY, Liang Q, Luo G, Li P. Metabolomic and lipidomic study of the protective effect of Chaihuang-Yishen formula on rats with diabetic nephropathy. JOURNAL OF ETHNOPHARMACOLOGY 2015; 166:31-41. [PMID: 25698246 DOI: 10.1016/j.jep.2015.02.019] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/10/2014] [Revised: 02/06/2015] [Accepted: 02/08/2015] [Indexed: 06/04/2023]
Abstract
ETHNOPHARMACOLOGICAL RELEVANCE Chaihuang-Yishen formula (CHYS) is a Chinese herbal formula that has been shown clinically to effectively treat chronic kidney disease including diabetic nephropathy (DN), also known as diabetic kidney disease. Our previous animal studies showed that numerous intrarenal metabolites were associated with the development of DN. In the present work, an integrated metabolomic and lipidomic analysis was used to further examine whether CHYS could attenuate the development of DN by regulating the disordered metabolic pathways. METHOD Progressive diabetic kidney disease was induced in Wistar rats by uninephrectomy and a single intraperitoneal injection of streptozocin. Over 20 weeks, one group of animals was treated with CHYS and another group went untreated. Effects of CHYS on metabolomic and lipidomic changes in the renal cortex of diabetic rats were studied using gas chromatography/time-of-flight mass spectrometry, ultra-performance liquid chromatography/time-of-flight mass spectrometry, and tandem MS-based metabolomic and lipidomic. The well-established drug fosinopril was used as positive control throughout the experiment. RESULTS Like fosinopril, treatment with CHYS produced a renoprotective effect against DN. Metabolomic and lipidomic analyses showed that the therapeutic effect of CHYS on DN was significantly associated with inhibition of the elevated organic toxins including several uremic toxins and glucuronides, and normalization of diminished phospholipids, especially sphingomyelins. CONCLUSION Improved abnormal metabolic and lipidomic disorders, such as accumulation of uremic toxins and glucuronides and phospholipids, may be mechanisms by which treatment of CHYS inhibits DN. Results from this study provide new evidence for the pharmacologic characteristics of CHYS on DN.
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Affiliation(s)
- Tie Zhao
- Department of Pharmacy, China-Japan Friendship Hospital, Beijing, China
| | - Haojun Zhang
- Department of Pharmacology, Institute of Clinical Medical Sciences, China-Japan Friendship Hospital, Yinghua Donglu, Hepingli, Chaoyang District, Beijing 100029, China
| | - Xianglin Zhang
- Department of Pharmacy, China-Japan Friendship Hospital, Beijing, China
| | - Tingting Zhao
- Department of Pharmacology, Institute of Clinical Medical Sciences, China-Japan Friendship Hospital, Yinghua Donglu, Hepingli, Chaoyang District, Beijing 100029, China
| | - Hui-Yao Lan
- Department of Medicine and Therapeutics, and Li Ka Shing Institute of Health Sciences, The Chinese University of Hong Kong, Hong Kong SAR, China
| | - Qionglin Liang
- Key Laboratory of Bioorganic Phosphorus Chemistry & Chemical Biology (Ministry of Education), Department of Chemistry, Tsinghua University, Beijing, China
| | - Guoan Luo
- Key Laboratory of Bioorganic Phosphorus Chemistry & Chemical Biology (Ministry of Education), Department of Chemistry, Tsinghua University, Beijing, China
| | - Ping Li
- Department of Pharmacology, Institute of Clinical Medical Sciences, China-Japan Friendship Hospital, Yinghua Donglu, Hepingli, Chaoyang District, Beijing 100029, China.
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Kelly KJ, Liu Y, Zhang J, Dominguez JH. Renal C3 complement component: feed forward to diabetic kidney disease. Am J Nephrol 2015; 41:48-56. [PMID: 25662584 DOI: 10.1159/000371426] [Citation(s) in RCA: 37] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/17/2014] [Accepted: 12/02/2014] [Indexed: 12/13/2022]
Abstract
BACKGROUND Diabetic nephropathy is the main cause of end-stage renal disease and has reached epidemic proportions. METHODS Comprehensive genomic profiling (RNAseq) was employed in the ZS (F1 hybrids of Zucker and spontaneously hypertensive heart failure) model of diabetic nephropathy. Controls were lean littermates. RESULTS Diabetic nephropathy in obese, diabetic ZS was accelerated by a single episode of renal ischemia (DI). This rapid renal decline was accompanied by the activation of the renal complement system in DI, and to a lesser extent in sham-operated diabetic rats (DS). In DI there were significant increases in renal mRNA encoding C3, C4, C5, C6, C8, and C9 over sham-operated lean normal controls (LS). Moreover, mRNAs encoding the receptors for the anaphylatoxins C3a and C5a were also significantly increased in DI compared to LS. The classic complement pathway was activated in diabetic kidneys with significant increases of C1qa, C1qb, and C1qc mRNAs in DI over LS. In addition, critical regulators of complement activation were significantly attenuated in DI and DS. These included mRNAs encoding CD55, decay accelerating factor, and CD59, which inhibit the membrane attack complex. C3, C4, and C9 proteins were demonstrated in renal tubules and glomeruli. The complement RNAseq data were incorporated into a gene network showing interactions among C3-generating renal tubular cells and other immune competent migratory cells. CONCLUSIONS We conclude that local activation of the complement system mediates renal injury in diabetic nephropathy.
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Affiliation(s)
- Katherine J Kelly
- Department of Medicine, Indiana University School of Medicine, Indianapolis, Ind., USA
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Frankl-Vilches C, Kuhl H, Werber M, Klages S, Kerick M, Bakker A, de Oliveira EH, Reusch C, Capuano F, Vowinckel J, Leitner S, Ralser M, Timmermann B, Gahr M. Using the canary genome to decipher the evolution of hormone-sensitive gene regulation in seasonal singing birds. Genome Biol 2015; 16:19. [PMID: 25631560 PMCID: PMC4373106 DOI: 10.1186/s13059-014-0578-9] [Citation(s) in RCA: 39] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/14/2014] [Accepted: 12/23/2014] [Indexed: 11/15/2022] Open
Abstract
BACKGROUND While the song of all songbirds is controlled by the same neural circuit, the hormone dependence of singing behavior varies greatly between species. For this reason, songbirds are ideal organisms to study ultimate and proximate mechanisms of hormone-dependent behavior and neuronal plasticity. RESULTS We present the high quality assembly and annotation of a female 1.2-Gbp canary genome. Whole genome alignments between the canary and 13 genomes throughout the bird taxa show a much-conserved synteny, whereas at the single-base resolution there are considerable species differences. These differences impact small sequence motifs like transcription factor binding sites such as estrogen response elements and androgen response elements. To relate these species-specific response elements to the hormone-sensitivity of the canary singing behavior, we identify seasonal testosterone-sensitive transcriptomes of major song-related brain regions, HVC and RA, and find the seasonal gene networks related to neuronal differentiation only in the HVC. Testosterone-sensitive up-regulated gene networks of HVC of singing males concerned neuronal differentiation. Among the testosterone-regulated genes of canary HVC, 20% lack estrogen response elements and 4 to 8% lack androgen response elements in orthologous promoters in the zebra finch. CONCLUSIONS The canary genome sequence and complementary expression analysis reveal intra-regional evolutionary changes in a multi-regional neural circuit controlling seasonal singing behavior and identify gene evolution related to the hormone-sensitivity of this seasonal singing behavior. Such genes that are testosterone- and estrogen-sensitive specifically in the canary and that are involved in rewiring of neurons might be crucial for seasonal re-differentiation of HVC underlying seasonal song patterning.
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Affiliation(s)
- Carolina Frankl-Vilches
- Department of Behavioral Neurobiology, Max Planck Institute for Ornithology, 82319, Seewiesen, Germany.
| | - Heiner Kuhl
- Department of Behavioral Neurobiology, Max Planck Institute for Ornithology, 82319, Seewiesen, Germany.
- Max Planck Institute for Molecular Genetics, Sequencing Core Facility, 14195, Berlin, Germany.
| | - Martin Werber
- Max Planck Institute for Molecular Genetics, Sequencing Core Facility, 14195, Berlin, Germany.
| | - Sven Klages
- Max Planck Institute for Molecular Genetics, Sequencing Core Facility, 14195, Berlin, Germany.
| | - Martin Kerick
- Max Planck Institute for Molecular Genetics, Sequencing Core Facility, 14195, Berlin, Germany.
| | - Antje Bakker
- Department of Behavioral Neurobiology, Max Planck Institute for Ornithology, 82319, Seewiesen, Germany.
| | - Edivaldo Hc de Oliveira
- Laboratório de Cultura de Tecidos e Citogenética, SAMAM, Instituto Evandro Chagas, Ananindeua, Pará, and Faculdade de Ciências Naturais (ICEN), Universidade Federal do Pará, Belém, 66075-110, Brazil.
| | - Christina Reusch
- Department of Behavioral Neurobiology, Max Planck Institute for Ornithology, 82319, Seewiesen, Germany.
| | - Floriana Capuano
- Department of Biochemistry and Cambridge Systems Biology Centre, 80 Tennis Court Road, Cambridge, CB2 1GA, UK.
| | - Jakob Vowinckel
- Department of Biochemistry and Cambridge Systems Biology Centre, 80 Tennis Court Road, Cambridge, CB2 1GA, UK.
| | - Stefan Leitner
- Department of Behavioral Neurobiology, Max Planck Institute for Ornithology, 82319, Seewiesen, Germany.
| | - Markus Ralser
- Department of Biochemistry and Cambridge Systems Biology Centre, 80 Tennis Court Road, Cambridge, CB2 1GA, UK.
- Division of Physiology and Metabolism, MRC National Institute for Medical Research, the Ridgeway, Mill Hill, London, NW7 1AA, UK.
| | - Bernd Timmermann
- Max Planck Institute for Molecular Genetics, Sequencing Core Facility, 14195, Berlin, Germany.
| | - Manfred Gahr
- Department of Behavioral Neurobiology, Max Planck Institute for Ornithology, 82319, Seewiesen, Germany.
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Dittrich F, Ramenda C, Grillitsch D, Frankl-Vilches C, Ko MC, Hertel M, Goymann W, ter Maat A, Gahr M. Regulatory mechanisms of testosterone-stimulated song in the sensorimotor nucleus HVC of female songbirds. BMC Neurosci 2014; 15:128. [PMID: 25442096 PMCID: PMC4261767 DOI: 10.1186/s12868-014-0128-0] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/15/2014] [Accepted: 11/13/2014] [Indexed: 01/04/2023] Open
Abstract
Background In male birds, influence of the sex steroid hormone testosterone and its estrogenic metabolites on seasonal song behavior has been demonstrated for many species. In contrast, female song was only recently recognized to be widespread among songbird species, and to date, sex hormone effects on singing and brain regions controlling song development and production (song control nuclei) have been studied in females almost exclusively using domesticated canaries (Serinus canaria). However, domesticated female canaries hardly sing at all in normal circumstances and exhibit only very weak, if any, song seasonally under the natural photoperiod. By contrast, adult female European robins (Erithacus rubecula) routinely sing during the winter season, a time when they defend feeding territories and show elevated circulating testosterone levels. We therefore used wild female European robins captured in the fall to examine the effects of testosterone administration on song as well as on the anatomy and the transcriptome of the song control nucleus HVC (sic). The results obtained from female robins were compared to outcomes of a similar experiment done in female domesticated canaries. Results Testosterone treatment induced abundant song in female robins. Examination of HVC transcriptomes and histological analyses of song control nuclei showed testosterone-induced differentiation processes related to neuron growth and spacing, angiogenesis and neuron projection morphogenesis. Similar effects were found in female canaries treated with testosterone. In contrast, the expression of genes related to synaptic transmission was not enhanced in the HVC of testosterone treated female robins but was strongly up-regulated in female canaries. A comparison of the testosterone-stimulated transcriptomes indicated that brain-derived neurotrophic factor (BDNF) likely functions as a common mediator of the testosterone effects in HVC. Conclusions Testosterone-induced singing of female robins correlated with cellular differentiation processes in the HVC that were partially similar to those seen in the HVC of testosterone-treated female canaries. Other modes of testosterone action, notably related to synaptic transmission, appeared to be regulated in a more species-specific manner in the female HVC. Divergent effects of testosterone on the HVC of different species might be related to differences between species in regulatory mechanisms of the singing behavior. Electronic supplementary material The online version of this article (doi:10.1186/s12868-014-0128-0) contains supplementary material, which is available to authorized users.
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Affiliation(s)
- Falk Dittrich
- Max Planck Institute for Ornithology, Department of Behavioural Neurobiology, Eberhard-Gwinner Strasse, Haus 6a, Seewiesen, 82319, Germany.
| | - Claudia Ramenda
- Max Planck Institute for Ornithology, Department of Behavioural Neurobiology, Eberhard-Gwinner Strasse, Haus 6a, Seewiesen, 82319, Germany.
| | - Doris Grillitsch
- Max Planck Institute for Ornithology, Department of Behavioural Neurobiology, Eberhard-Gwinner Strasse, Haus 6a, Seewiesen, 82319, Germany.
| | - Carolina Frankl-Vilches
- Max Planck Institute for Ornithology, Department of Behavioural Neurobiology, Eberhard-Gwinner Strasse, Haus 6a, Seewiesen, 82319, Germany.
| | - Meng-Ching Ko
- Max Planck Institute for Ornithology, Department of Behavioural Neurobiology, Eberhard-Gwinner Strasse, Haus 6a, Seewiesen, 82319, Germany.
| | - Moritz Hertel
- Max Planck Institute for Ornithology, Department of Behavioural Neurobiology, Eberhard-Gwinner Strasse, Haus 6a, Seewiesen, 82319, Germany.
| | - Wolfgang Goymann
- Max Planck Institute for Ornithology, Department of Behavioural Neurobiology, Eberhard-Gwinner Strasse, Haus 6a, Seewiesen, 82319, Germany.
| | - Andries ter Maat
- Max Planck Institute for Ornithology, Department of Behavioural Neurobiology, Eberhard-Gwinner Strasse, Haus 6a, Seewiesen, 82319, Germany.
| | - Manfred Gahr
- Max Planck Institute for Ornithology, Department of Behavioural Neurobiology, Eberhard-Gwinner Strasse, Haus 6a, Seewiesen, 82319, Germany.
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Heinzel A, Perco P, Mayer G, Oberbauer R, Lukas A, Mayer B. From molecular signatures to predictive biomarkers: modeling disease pathophysiology and drug mechanism of action. Front Cell Dev Biol 2014; 2:37. [PMID: 25364744 PMCID: PMC4207010 DOI: 10.3389/fcell.2014.00037] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/24/2014] [Accepted: 07/29/2014] [Indexed: 12/31/2022] Open
Abstract
Omics profiling significantly expanded the molecular landscape describing clinical phenotypes. Association analysis resulted in first diagnostic and prognostic biomarker signatures entering clinical utility. However, utilizing Omics for deepening our understanding of disease pathophysiology, and further including specific interference with drug mechanism of action on a molecular process level still sees limited added value in the clinical setting. We exemplify a computational workflow for expanding from statistics-based association analysis toward deriving molecular pathway and process models for characterizing phenotypes and drug mechanism of action. Interference analysis on the molecular model level allows identification of predictive biomarker candidates for testing drug response. We discuss this strategy on diabetic nephropathy (DN), a complex clinical phenotype triggered by diabetes and presenting with renal as well as cardiovascular endpoints. A molecular pathway map indicates involvement of multiple molecular mechanisms, and selected biomarker candidates reported as associated with disease progression are identified for specific molecular processes. Selective interference of drug mechanism of action and disease-associated processes is identified for drug classes in clinical use, in turn providing precision medicine hypotheses utilizing predictive biomarkers.
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Affiliation(s)
| | - Paul Perco
- emergentec biodevelopment GmbHVienna, Austria
| | - Gert Mayer
- Department of Internal Medicine IV, Medical University of InnsbruckInnsbruck, Austria
| | - Rainer Oberbauer
- Department of Internal Medicine III, KH Elisabethinen Linz and Medical University of ViennaVienna, Austria
| | - Arno Lukas
- emergentec biodevelopment GmbHVienna, Austria
| | - Bernd Mayer
- emergentec biodevelopment GmbHVienna, Austria
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Afkarian M, Hirsch IB, Tuttle KR, Greenbaum C, Himmelfarb J, de Boer IH. Urinary excretion of RAS, BMP, and WNT pathway components in diabetic kidney disease. Physiol Rep 2014; 2:e12010. [PMID: 24793984 PMCID: PMC4098738 DOI: 10.14814/phy2.12010] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/02/2023] Open
Abstract
The renin–angiotensin system (RAS), bone morphogenetic protein (BMP), and WNT pathways are involved in pathogenesis of diabetic kidney disease (DKD). This study characterized assays for urinary angiotensinogen (AGT), gremlin‐1, and matrix metalloproteinase 7 (MMP‐7), components of the RAS, BMP, and WNT pathways and examined their excretion in DKD. We measured urine AGT, gremlin‐1, and MMP‐7 in individuals with type 1 diabetes and prevalent DKD (n = 20) or longstanding (n = 61) or new‐onset (n = 10) type 1 diabetes without DKD. These urine proteins were also quantified in type 2 DKD (n = 11) before and after treatment with candesartan. The utilized immunoassays had comparable inter‐ and intra‐assay and intraindividual variation to assays used for urine albumin. Median (IQR) urine AGT concentrations were 226.0 (82.1, 550.3) and 13.0 (7.8, 20.0) μg/g creatinine in type 1 diabetes with and without DKD, respectively (P < 0.001). Median (IQR) urine gremlin‐1 concentrations were 48.6 (14.2, 254.1) and 3.6 (1.7, 5.5) μg/g, respectively (P < 0.001). Median (IQR) urine MMP‐7 concentrations were 6.0 (3.8, 10.5) and 1.0 (0.4, 2.9) μg/g creatinine, respectively (P < 0.001). Treatment with candesartan was associated with a reduction in median (IQR) urine AGT/creatinine from 23.5 (1.6, 105.1) to 2.0 (1.4, 13.7) μg/g, which did not reach statistical significance. Urine gremlin‐1 and MMP‐7 excretion did not decrease with candesartan. In conclusion, DKD is characterized by markedly elevated urine AGT, MMP‐7, and gremlin‐1. AGT decreased in response to RAS inhibition, suggesting that this marker reflects therapeutic response. Urinary components of the RAS, BMP, and WNT pathways may identify risk of DKD and aid development of novel therapeutics. Urine angiotensinogen, matrix metalloproteinase‐7, and gremlin‐1 concentrations are markedly elevated in people with type 1 diabetes and kidney disease, compared with those with recently diagnosed type 1 diabetes or longstanding type 1 diabetes without kidney disease. Treatment with an inhibitor of the renin–angiotensin system tended to reduce urine angiotensinogen concentration, but not urine matrix metalloproteinase‐7 or gremlin‐1.
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Affiliation(s)
- Maryam Afkarian
- Kidney Research Institute and Division of Nephrology, Department of Medicine, University of Washington, Seattle, Washington
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Deshpande SD, Putta S, Wang M, Lai JY, Bitzer M, Nelson RG, Lanting LL, Kato M, Natarajan R. Transforming growth factor-β-induced cross talk between p53 and a microRNA in the pathogenesis of diabetic nephropathy. Diabetes 2013; 62:3151-62. [PMID: 23649518 PMCID: PMC3749352 DOI: 10.2337/db13-0305] [Citation(s) in RCA: 127] [Impact Index Per Article: 11.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Abstract
Elevated p53 expression is associated with several kidney diseases including diabetic nephropathy (DN). However, the mechanisms are unclear. We report that expression levels of transforming growth factor-β1 (TGF-β), p53, and microRNA-192 (miR-192) are increased in the renal cortex of diabetic mice, and this is associated with enhanced glomerular expansion and fibrosis relative to nondiabetic mice. Targeting miR-192 with locked nucleic acid-modified inhibitors in vivo decreases expression of p53 in the renal cortex of control and streptozotocin-injected diabetic mice. Furthermore, mice with genetic deletion of miR-192 in vivo display attenuated renal cortical TGF-β and p53 expression when made diabetic, and have reduced renal fibrosis, hypertrophy, proteinuria, and albuminuria relative to diabetic wild-type mice. In vitro promoter regulation studies show that TGF-β induces reciprocal activation of miR-192 and p53, via the miR-192 target Zeb2, leading to augmentation of downstream events related to DN. Inverse correlation between miR-192 and Zeb2 was observed in glomeruli of human subjects with early DN, consistent with the mechanism seen in mice. Our results demonstrate for the first time a TGF-β-induced feedback amplification circuit between p53 and miR-192 related to the pathogenesis of DN, and that miR-192-knockout mice are protected from key features of DN.
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Affiliation(s)
- Supriya D. Deshpande
- Irell & Manella Graduate School of Biological Sciences, Beckman Research Institute of the City of Hope, Duarte, California
- Division of Molecular Diabetes Research, Department of Diabetes and Metabolic Diseases Research, Beckman Research Institute of the City of Hope, Duarte, California
| | - Sumanth Putta
- Division of Molecular Diabetes Research, Department of Diabetes and Metabolic Diseases Research, Beckman Research Institute of the City of Hope, Duarte, California
| | - Mei Wang
- Division of Molecular Diabetes Research, Department of Diabetes and Metabolic Diseases Research, Beckman Research Institute of the City of Hope, Duarte, California
| | - Jennifer Y. Lai
- Department of Internal Medicine, University of Michigan, Ann Arbor, Michigan
| | - Markus Bitzer
- Department of Internal Medicine, University of Michigan, Ann Arbor, Michigan
| | - Robert G. Nelson
- National Institute of Diabetes and Digestive and Kidney Diseases, National Institutes of Health, Phoenix, Arizona
| | - Linda L. Lanting
- Division of Molecular Diabetes Research, Department of Diabetes and Metabolic Diseases Research, Beckman Research Institute of the City of Hope, Duarte, California
| | - Mitsuo Kato
- Division of Molecular Diabetes Research, Department of Diabetes and Metabolic Diseases Research, Beckman Research Institute of the City of Hope, Duarte, California
- Corresponding authors: Rama Natarajan, , and Mitsuo Kato,
| | - Rama Natarajan
- Irell & Manella Graduate School of Biological Sciences, Beckman Research Institute of the City of Hope, Duarte, California
- Division of Molecular Diabetes Research, Department of Diabetes and Metabolic Diseases Research, Beckman Research Institute of the City of Hope, Duarte, California
- Corresponding authors: Rama Natarajan, , and Mitsuo Kato,
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Sieber J, Weins A, Kampe K, Gruber S, Lindenmeyer MT, Cohen CD, Orellana JM, Mundel P, Jehle AW. Susceptibility of podocytes to palmitic acid is regulated by stearoyl-CoA desaturases 1 and 2. THE AMERICAN JOURNAL OF PATHOLOGY 2013; 183:735-44. [PMID: 23867797 DOI: 10.1016/j.ajpath.2013.05.023] [Citation(s) in RCA: 38] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Subscribe] [Scholar Register] [Received: 01/28/2013] [Revised: 05/14/2013] [Accepted: 05/16/2013] [Indexed: 12/21/2022]
Abstract
Type 2 diabetes mellitus is characterized by dyslipidemia with elevated free fatty acids (FFAs). Loss of podocytes is a hallmark of diabetic nephropathy, and podocytes are highly susceptible to saturated FFAs but not to protective, monounsaturated FFAs. We report that patients with diabetic nephropathy develop alterations in glomerular gene expression of enzymes involved in fatty acid metabolism, including induction of stearoyl-CoA desaturase (SCD)-1, which converts saturated to monounsaturated FFAs. By IHC of human renal biopsy specimens, glomerular SCD-1 induction was observed in podocytes of patients with diabetic nephropathy. Functionally, the liver X receptor agonists TO901317 and GW3965, two known inducers of SCD, increased Scd-1 and Scd-2 expression in cultured podocytes and reduced palmitic acid-induced cell death. Similarly, overexpression of Scd-1 attenuated palmitic acid-induced cell death. The protective effect of TO901317 was associated with a reduction of endoplasmic reticulum stress. It was lost after gene silencing of Scd-1/-2, thereby confirming that the protective effect of TO901317 is mediated by Scd-1/-2. TO901317 also shifted palmitic acid-derived FFAs into biologically inactive triglycerides. In summary, SCD-1 up-regulation in diabetic nephropathy may be part of a protective mechanism against saturated FFA-derived toxic metabolites that drive endoplasmic reticulum stress and podocyte death.
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Affiliation(s)
- Jonas Sieber
- Laboratory of Molecular Nephrology, Department of Biomedicine, University Hospital, Basel, Switzerland
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36
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Kelly KJ, Liu Y, Zhang J, Goswami C, Lin H, Dominguez JH. Comprehensive genomic profiling in diabetic nephropathy reveals the predominance of proinflammatory pathways. Physiol Genomics 2013; 45:710-9. [PMID: 23757392 DOI: 10.1152/physiolgenomics.00028.2013] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/15/2023] Open
Abstract
Despite advances in the treatment of diabetic nephropathy (DN), currently available therapies have not prevented the epidemic of progressive chronic kidney disease (CKD). The morbidity of CKD, and the inexorable increase in the prevalence of end-stage renal disease, demands more effective approaches to prevent and treat progressive CKD. We undertook next-generation sequencing in a rat model of diabetic nephropathy to study in depth the pathogenic alterations involved in DN with progressive CKD. We employed the obese, diabetic ZS rat, a model that develops diabetic nephropathy, characterized by progressive CKD, inflammation, and fibrosis, the hallmarks of human disease. We then used RNA-seq to examine the combined effects of renal cells and infiltrating inflammatory cells acting as a pathophysiological unit. The comprehensive systems biology analysis of progressive CKD revealed multiple interactions of altered genes that were integrated into morbid networks. These pathological gene assemblies lead to renal inflammation and promote apoptosis and cell cycle arrest in progressive CKD. Moreover, in what is clearly a major therapeutic challenge, multiple and redundant pathways were found to be linked to renal fibrosis, a major cause of kidney loss. We conclude that systems biology applied to progressive CKD in DN can be used to develop novel therapeutic strategies directed to restore critical anomalies in affected gene networks.
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Affiliation(s)
- K J Kelly
- Department of Medicine, Indiana University School of Medicine, Indianapolis, Indiana, USA
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Heinzel A, Fechete R, Mühlberger I, Perco P, Mayer B, Lukas A. Molecular models of the cardiorenal syndrome. Electrophoresis 2013; 34:1649-56. [PMID: 23494759 DOI: 10.1002/elps.201200642] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/27/2012] [Revised: 02/08/2013] [Accepted: 02/13/2013] [Indexed: 01/15/2023]
Abstract
Molecular profiling techniques have provided extensive sets of molecular features characterizing clinical phenotypes, but further extrapolation to mechanistic molecular models of disease pathophysiology faces major challenges. Here, we describe a computational procedure for delineating molecular disease models utilizing omics profiles, and exemplify the methodology on aspects of the cardiorenal syndrome describing the clinical association of declining kidney function and increased cardiovascular event rates. Individual molecular features as well as selected molecular processes were identified as linking cardiovascular and renal pathology as a combination of cross-organ mediators and common pathophysiology. The molecular characterization of the disease presents as a set of molecular processes together with their interactions, composing a molecular disease model of the cardiorenal syndrome. Integrating omics profiles describing aspects of cardiovascular disease and respective profiles for advanced chronic kidney disease on molecular interaction networks, computation of disease term-specific subgraphs, and complemented by subgraph segmentation allowed delineation of disease term-specific molecular models, at their intersection providing contributors to cardiorenal pathology. Building such molecular disease models allows in a generic way to integrate multi-omics sources for generating comprehensive sets of molecular processes, on such basis providing rationale for biomarker panel selection for further characterizing clinical phenotypes.
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38
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Mayer P, Mayer B, Mayer G. Systems biology building a useful model from multiple markers and profiles. Nephrol Dial Transplant 2012; 27:3995-4002. [DOI: 10.1093/ndt/gfs489] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022] Open
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Djudjaj S, Chatziantoniou C, Raffetseder U, Guerrot D, Dussaule JC, Boor P, Kerroch M, Hanssen L, Brandt S, Dittrich A, Ostendorf T, Floege J, Zhu C, Lindenmeyer M, Cohen CD, Mertens PR. Notch-3 receptor activation drives inflammation and fibrosis following tubulointerstitial kidney injury. J Pathol 2012; 228:286-99. [DOI: 10.1002/path.4076] [Citation(s) in RCA: 70] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/23/2012] [Revised: 07/06/2012] [Accepted: 07/11/2012] [Indexed: 01/16/2023]
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Shahni R, Gnudi L, King A, Jones P, Malik AN. Elevated levels of renal and circulating Nop-7-associated 2 (NSA2) in rat and mouse models of diabetes, in mesangial cells in vitro and in patients with diabetic nephropathy. Diabetologia 2012; 55:825-34. [PMID: 22095236 DOI: 10.1007/s00125-011-2373-4] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/07/2011] [Accepted: 10/18/2011] [Indexed: 12/11/2022]
Abstract
AIMS/HYPOTHESIS We previously found that Nop-7-associated 2 (NSA2), which is involved in ribosomal biogenesis in yeast and is a putative cell cycle regulator in mammalian cells, is elevated in the kidney of Goto-Kakizaki (GK) rat, a spontaneous model of type 2 diabetes. Here we tested the hypothesis that elevated NSA2 is involved in diabetic nephropathy (DN). METHODS We examined Nsa2/NSA2 expression and NSA2 production in two rodent models of diabetes, in cultured renal glomerular cells, and in diabetic patients with and without nephropathy. Patients with nephropathy who had a history of albuminuria were further divided as responders (DN-NA; DN patients normoalbuminuric at the time of this study with a history of albuminuria) and non-responders (DN-A; diabetic nephropathy patients with albuminuria) to current treatment for albuminuria. RESULTS Renal Nsa2/NSA2 mRNA increased in tandem with hyperglycaemia in GK rats, in a streptozotocin-induced mouse model of diabetes, and in human mesangial cells (HMCs) grown in high glucose (p < 0.05). In the mouse model of diabetes, hyperglycaemia resulted in increased Nsa2 expression and NSA2 levels in tubular and glomerular cells and in circulating cells; this increase was normalised by diabetes treatment. Circulating NSA2 mRNA levels were elevated in patients with DN independently of body weight (BMI), glycaemic (HbA(1c)) and haemodynamic (blood pressure) control, and showed an inverse correlation with renal function (GFR, p < 0.05). NSA2 levels were the only variable that showed a significant difference between patients with albuminuria (DN-A) compared with non-albuminuric patients (DN-NA) and diabetic controls (p < 0.05), this increase being independent of all other variables, including GFR. CONCLUSION We show for the first time that renal and circulating NSA2/NSA2 levels are increased in hyperglycaemia in experimental models of diabetes, and that circulating NSA2 is elevated in DN patients with albuminuria. Further studies will be required to assess whether NSA2 plays a role in the pathogenesis of DN.
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MESH Headings
- Adult
- Aged
- Albuminuria/etiology
- Animals
- Cell Cycle Proteins/blood
- Cell Cycle Proteins/genetics
- Cell Cycle Proteins/metabolism
- Cells, Cultured
- Diabetes Mellitus, Type 1/complications
- Diabetes Mellitus, Type 1/metabolism
- Diabetes Mellitus, Type 1/pathology
- Diabetes Mellitus, Type 1/urine
- Diabetes Mellitus, Type 2/complications
- Diabetes Mellitus, Type 2/metabolism
- Diabetes Mellitus, Type 2/pathology
- Diabetes Mellitus, Type 2/urine
- Diabetic Nephropathies/blood
- Diabetic Nephropathies/metabolism
- Diabetic Nephropathies/pathology
- Diabetic Nephropathies/physiopathology
- Disease Models, Animal
- Female
- Gene Expression Regulation
- Humans
- Kidney/cytology
- Kidney/metabolism
- Kidney/pathology
- Kidney/physiopathology
- Male
- Mesangial Cells/metabolism
- Mice
- Mice, Inbred C57BL
- Middle Aged
- Nuclear Proteins/blood
- Nuclear Proteins/genetics
- Nuclear Proteins/metabolism
- RNA, Messenger/metabolism
- RNA-Binding Proteins
- Rats
- Rats, Inbred Strains
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Affiliation(s)
- R Shahni
- Diabetes Research Group, Division of Diabetes and Nutritional Sciences, School of Medicine, Kings College London, Hodgkin Building, London Bridge, London SE1 1UL, UK
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41
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von Toerne C, Bedke J, Safi S, Porubsky S, Gretz N, Loewe R, Nelson PJ, Gröne HJ. Modulation of Wnt and Hedgehog signaling pathways is linked to retinoic acid-induced amelioration of chronic allograft dysfunction. Am J Transplant 2012; 12:55-68. [PMID: 21992189 DOI: 10.1111/j.1600-6143.2011.03776.x] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/25/2023]
Abstract
Chronic renal allograft damage (CAD) is manifested by a smoldering inflammatory process that leads to transplant glomerulopathy, diffuse interstitial fibrosis and tubular atrophy with loss of tubular structures. Using a Fischer 344 (RT1lvl) to Lewis (RT1l) rat renal allograft model, transcriptomic profiling and pathway mapping, we have previously shown that dynamic dysregulation of the Wnt signaling pathways may underlie progressive CAD. Retinoic acid, an important regulator of differentiation during vertebrate embryogenesis, can moderate the damage observed in this experimental model of CAD. We show here that subsets of the Hedgehog (Hh) and canonical Wnt signaling pathways are linked to the pathophysiology of progressive fibrosis, loss of cilia in epithelia and chronic dysfunction. Oral treatment with 13cis retinoic acid (13cRA) was found to selectively ameliorate the dysregulation of the Hh and canonical Wnt pathways associated with CAD, and lead to a general preservation of cilial structures. Interplay between these pathways helps explain the therapeutic effects of retinoic acid treatment in CAD, and suggests future targets for moderating chronic fibrosing organ damage.
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Affiliation(s)
- C von Toerne
- Clinical Biochemistry Group, Medical Policlinic, University of Munich, Munich, Germany
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42
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Zhou T, He X, Cheng R, Zhang B, Zhang RR, Chen Y, Takahashi Y, Murray AR, Lee K, Gao G, Ma JX. Implication of dysregulation of the canonical wingless-type MMTV integration site (WNT) pathway in diabetic nephropathy. Diabetologia 2012; 55:255-66. [PMID: 22016045 DOI: 10.1007/s00125-011-2314-2] [Citation(s) in RCA: 80] [Impact Index Per Article: 6.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/27/2011] [Accepted: 08/02/2011] [Indexed: 12/31/2022]
Abstract
AIMS/HYPOTHESIS The wingless-type MMTV integration site (WNT) pathway mediates multiple physiological and pathological processes, such as inflammation, angiogenesis and fibrosis. The aim of this study was to investigate whether canonical WNT signalling plays a role in the pathogenesis of diabetic nephropathy. METHODS Expression of WNT ligands and frizzled receptors in the canonical WNT pathway in the kidney was compared at the mRNA level using real-time RT-PCR between Akita mice, streptozotocin-induced diabetic rats and db/db mice and their respective non-diabetic controls. Renal function was evaluated by measuring the urine albumin excretion. Human renal proximal tubular epithelial cells were treated with high-glucose medium and 4-hydroxynonenal (HNE). Levels of β-catenin, connective tissue growth factor and fibronectin were determined by western blot analysis. RESULTS Some of the WNT ligands and frizzled receptors showed increased mRNA levels in the kidneys of Akita mice, streptozotocin-induced diabetic rats and db/db mice compared with their non-diabetic controls. Renal levels of β-catenin and WNT proteins were upregulated in these diabetic models. Lowering the blood glucose levels by insulin attenuated the activation of WNT signalling in the kidneys of Akita mice. In cultured human renal proximal tubular epithelial cells, both high glucose and HNE activated WNT signalling. Inhibition of WNT signalling with a monoclonal antibody blocking LDL-receptor-related protein 6 ameliorated renal inflammation and fibrosis and reduced proteinuria in Akita mice. CONCLUSIONS/INTERPRETATION The WNT pathway is activated in the kidneys of models of both type 1 and 2 diabetes. Dysregulation of the WNT pathway in diabetes represents a new pathogenic mechanism of diabetic nephropathy and renders a new therapeutic target.
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Affiliation(s)
- T Zhou
- Department of Biochemistry, Zhongshan Medical School, Sun Yat-sen University, Guangzhou, People's Republic of China
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43
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Conway BR, Rennie J, Bailey MA, Dunbar DR, Manning JR, Bellamy CO, Hughes J, Mullins JJ. Hyperglycemia and renin-dependent hypertension synergize to model diabetic nephropathy. J Am Soc Nephrol 2011; 23:405-11. [PMID: 22193383 DOI: 10.1681/asn.2011060577] [Citation(s) in RCA: 35] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022] Open
Abstract
Rodent models exhibit only the earliest features of human diabetic nephropathy, which limits our ability to investigate new therapies. Hypertension is a prerequisite for advanced diabetic nephropathy in humans, so its rarity in typical rodent models may partly explain their resistance to nephropathy. Here, we used the Cyp1a1mRen2 rat, in which the murine renin-2 gene is incorporated under the Cytochrome P4501a1 promoter. In this transgenic strain, administration of low-dose dietary indole-3-carbinol induces moderate hypertension. In the absence of hypertension, streptozotocin-induced diabetes resulted in a 14-fold increase in albuminuria but only mild changes in histology and gene expression despite 28 weeks of marked hyperglycemia. In the presence of induced hypertension, hyperglycemia resulted in a 500-fold increase in albuminuria, marked glomerulosclerosis and tubulointerstitial fibrosis, and induction of many of the same pathways that are upregulated in the tubulointerstitium in human diabetic nephropathy. In conclusion, although induction of diabetes alone in rodents has limited utility to model human diabetic nephropathy, renin-dependent hypertension and hyperglycemia synergize to recapitulate many of the clinical, histological, and gene expression changes observed in humans.
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Affiliation(s)
- Bryan R Conway
- MRC Centre for Inflammation Research, University of Edinburgh, Edinburgh, Scotland, UK.
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44
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Derosa CA, Furusato B, Shaheduzzaman S, Srikantan V, Wang Z, Chen Y, Seifert M, Siefert M, Ravindranath L, Young D, Nau M, Dobi A, Werner T, McLeod DG, Vahey MT, Sesterhenn IA, Srivastava S, Petrovics G. Elevated osteonectin/SPARC expression in primary prostate cancer predicts metastatic progression. Prostate Cancer Prostatic Dis 2011; 15:150-6. [PMID: 22343836 DOI: 10.1038/pcan.2011.61] [Citation(s) in RCA: 54] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
Abstract
BACKGROUND The majority of prostate cancers (CaP) are detected in early stages with uncertain prognosis. Therefore, an intensive effort is underway to define early predictive markers of CaP with aggressive progression characteristics. METHODS In order to define such prognostic markers, we performed comparative analyses of transcriptomes of well- and poorly differentiated (PD) tumor cells from primary tumors of patients (N=40) with 78 months of mean follow-up after radical prostatectomy. Validation experiments were carried out at transcript level by quantitative real-time reverse transcriptase-PCR (RT-PCR) (N=110) and at protein level by immunohistochemistry (N=53) in primary tumors from an independent patient cohort. RESULTS Association of a biochemical network of 12 genes with SPARC gene as a central node was highlighted with PD phenotype. Of note, there was remarkable enrichment of NKXH_NKXH_HOX composite regulatory elements in the promoter of the genes in this network suggesting a biological significance of this gene-expression regulatory mechanism in CaP progression. Further, quantitative expression analyses of SPARC mRNA in primary prostate tumor cells of 110 patients validated the association of SPARC expression with poor differentiation and higher Gleason score. Most significantly, higher SPARC protein expression at the time of prostatectomy was associated with the subsequent development of metastasis (P=0.0006, AUC=0.803). CONCLUSIONS In summary, we propose that evaluation of SPARC in primary CaP has potential as a prognostic marker of metastatic progression.
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Affiliation(s)
- C A Derosa
- Center for Prostate Disease Research, Department of Surgery, Uniformed Services University of the Health Sciences, Rockville, MD 20852, USA
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45
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Zhao T, Zhang H, Zhao T, Zhang X, Lu J, Yin T, Liang Q, Wang Y, Luo G, Lan H, Li P. Intrarenal metabolomics reveals the association of local organic toxins with the progression of diabetic kidney disease. J Pharm Biomed Anal 2011; 60:32-43. [PMID: 22153801 DOI: 10.1016/j.jpba.2011.11.010] [Citation(s) in RCA: 48] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/20/2011] [Revised: 11/07/2011] [Accepted: 11/08/2011] [Indexed: 12/15/2022]
Abstract
The pathological development of diabetic kidney disease (DKD) might involve metabolic perturbations in kidney tissue. The present study was designed to detect the systematic alterations of renal cortex metabolites thereby exploring the related mechanisms of DKD development and fosinopril treatment. Based on combined gas chromatography/time-of-flight mass spectrometry (GC-TOF MS) and liquid chromatography/time-of-flight mass spectrometry (UPLC-TOF MS) data acquiring platform, we have performed a metabolomic analysis of perfused renal cortex samples from the diabetic rats induced by streptozocin and treated with or without fosinopril, a pharmacological inhibitor of angiotensin II converting enzyme (ACEI). We identified a number of abnormal metabolites in the diabetic kidney, including groups of amino acids, carbohydrates, polyols, lyso-phospholipids, glucuronides and other unidentified metabolites. Of them, an increase in intrarenal organic toxins including uremic toxins, glucuronides and glucotocixity-associated metabolites are highly correlated with diabetic kidney injury including 24h urinary protein levels and tubulointerstitial injury index. Treatment with fosinopril significantly attenuated diabetic kidney injury, and simultaneously blocked the intrarenal accumulation of these organic toxins, especially hippurate and glucuronides. These results indicate that intrarenal accumulation of organic toxins may be significant for the development of DKD and the related mechanisms deserve to be further investigated.
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Affiliation(s)
- Tie Zhao
- Department of Pharmacology, Institute of Clinical Medical Sciences, China-Japan Friendship Hospital, Beijing, China
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46
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Hur J, Sullivan KA, Pande M, Hong Y, Sima AAF, Jagadish HV, Kretzler M, Feldman EL. The identification of gene expression profiles associated with progression of human diabetic neuropathy. ACTA ACUST UNITED AC 2011; 134:3222-35. [PMID: 21926103 DOI: 10.1093/brain/awr228] [Citation(s) in RCA: 114] [Impact Index Per Article: 8.8] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Abstract
Diabetic neuropathy is a common complication of diabetes. While multiple pathways are implicated in the pathophysiology of diabetic neuropathy, there are no specific treatments and no means to predict diabetic neuropathy onset or progression. Here, we identify gene expression signatures related to diabetic neuropathy and develop computational classification models of diabetic neuropathy progression. Microarray experiments were performed on 50 samples of human sural nerves collected during a 52-week clinical trial. A series of bioinformatics analyses identified differentially expressed genes and their networks and biological pathways potentially responsible for the progression of diabetic neuropathy. We identified 532 differentially expressed genes between patient samples with progressing or non-progressing diabetic neuropathy, and found these were functionally enriched in pathways involving inflammatory responses and lipid metabolism. A literature-derived co-citation network of the differentially expressed genes revealed gene subnetworks centred on apolipoprotein E, jun, leptin, serpin peptidase inhibitor E type 1 and peroxisome proliferator-activated receptor gamma. The differentially expressed genes were used to classify a test set of patients with regard to diabetic neuropathy progression. Ridge regression models containing 14 differentially expressed genes correctly classified the progression status of 92% of patients (P < 0.001). To our knowledge, this is the first study to identify transcriptional changes associated with diabetic neuropathy progression in human sural nerve biopsies and describe their potential utility in classifying diabetic neuropathy. Our results identifying the unique gene signature of patients with progressive diabetic neuropathy will facilitate the development of new mechanism-based diagnostics and therapies.
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Affiliation(s)
- Junguk Hur
- Bioinformatics Program, University of Michigan, Ann Arbor, MI 48109, USA
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47
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Sen K, Lindenmeyer MT, Gaspert A, Eichinger F, Neusser MA, Kretzler M, Segerer S, Cohen CD. Periostin is induced in glomerular injury and expressed de novo in interstitial renal fibrosis. THE AMERICAN JOURNAL OF PATHOLOGY 2011; 179:1756-67. [PMID: 21854746 DOI: 10.1016/j.ajpath.2011.06.002] [Citation(s) in RCA: 70] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/28/2010] [Revised: 05/26/2011] [Accepted: 06/22/2011] [Indexed: 11/28/2022]
Abstract
Matricellular proteins participate in the pathogenesis of chronic kidney diseases. We analyzed glomerular gene expression profiles from patients with proteinuric diseases to identify matricellular proteins contributing to the progression of human nephropathies. Several genes encoding matricellular proteins, such as SPARC, THBS1, and CTGF, were induced in progressive nephropathies, but not in nonprogressive minimal-change disease. Periostin showed the highest induction, and its transcript levels correlated negatively with glomerular filtration rate in both glomerular and tubulointerstitial specimen. In well-preserved renal tissue, periostin localized to the glomerular tuft, the vascular pole, and along Bowman's capsule; no signal was detected in the tubulointerstitial compartment. Biopsies from patients with glomerulopathies and renal dysfunction showed enhanced periostin expression in the mesangium, tubular interstitium, and sites of fibrosis. Periostin staining correlated negatively with renal function. α-smooth muscle actin-positive mesangial and interstitial cells localized close to periostin-positive sites, as indicated by co-immunofluorescence. In vitro stimulation of mesangial cells by external addition of TGF-β1 resulted in robust induction of periostin. Addition of periostin to mesangial cells induced cell proliferation and decreased the number of cells expressing activated caspase-3, a marker of apoptosis. These human data indicate for the first time a role of periostin in glomerular and interstitial injury in acquired nephropathies.
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Affiliation(s)
- Kontheari Sen
- Institute of Physiology and Division of Nephrology, Winterthurerstrasse 190, CH-8057 Zurich, Switzerland
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48
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Chuang PY, Dai Y, Liu R, He H, Kretzler M, Jim B, Cohen CD, He JC. Alteration of forkhead box O (foxo4) acetylation mediates apoptosis of podocytes in diabetes mellitus. PLoS One 2011; 6:e23566. [PMID: 21858169 PMCID: PMC3157434 DOI: 10.1371/journal.pone.0023566] [Citation(s) in RCA: 99] [Impact Index Per Article: 7.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/14/2011] [Accepted: 07/20/2011] [Indexed: 11/19/2022] Open
Abstract
The number of kidney podocytes is reduced in diabetic nephropathy. Advanced glycation end products (AGEs) accumulate in patients with diabetes and promote the apoptosis of podocyte by activating the forkhead box O4 (Foxo4) transcription factor to increase the expression of a pro-apoptosis gene, Bcl2l11. Using chromatin immunoprecipitation we demonstrate that AGE-modified bovine serum albumin (AGE-BSA) enhances Foxo4 binding to a forkhead binding element in the promoter of Bcl2lll. AGE-BSA also increases the acetylation of Foxo4. Lysine acetylation of Foxo4 is required for Foxo4 binding and transcription of Bcl2l11 in podocytes treated with AGE-BSA. The expression of a protein deacetylase that targets Foxo4 for deacetylation, sirtuin (Sirt1), is down regulated in cultured podocytes by AGE-BSA treatment and in glomeruli of diabetic patients. SIRT1 over expression in cultured murine podocytes prevents AGE-induced apoptosis. Glomeruli isolated from diabetic db/db mice have increased acetylation of Foxo4, suppressed expression of Sirt1, and increased expression of Bcl2l11 compared to non-diabetic littermates. Together, our data provide evidence that alteration of Foxo4 acetylation and down regulation of Sirt1 expression in diabetes promote podocyte apoptosis. Strategies to preserve Sirt1 expression or reduce Foxo4 acetylation could be used to prevent podocyte loss in diabetes.
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MESH Headings
- Acetylation
- Animals
- Apoptosis
- Apoptosis Regulatory Proteins/genetics
- Apoptosis Regulatory Proteins/metabolism
- Bcl-2-Like Protein 11
- Blotting, Western
- Cattle
- Cell Cycle Proteins
- Cell Line
- Cells, Cultured
- Diabetes Mellitus/genetics
- Diabetes Mellitus/metabolism
- Diabetes Mellitus/pathology
- Diabetes Mellitus, Type 2/genetics
- Diabetes Mellitus, Type 2/metabolism
- Diabetes Mellitus, Type 2/pathology
- Forkhead Transcription Factors/genetics
- Forkhead Transcription Factors/metabolism
- Gene Expression/drug effects
- Glycation End Products, Advanced/chemistry
- Glycation End Products, Advanced/pharmacology
- Humans
- Kidney Glomerulus/metabolism
- Kidney Glomerulus/pathology
- Membrane Proteins/genetics
- Membrane Proteins/metabolism
- Mice
- Mice, Inbred C57BL
- Mutation
- Podocytes/drug effects
- Podocytes/metabolism
- Promoter Regions, Genetic/genetics
- Protein Binding
- Proto-Oncogene Proteins/genetics
- Proto-Oncogene Proteins/metabolism
- RNA Interference
- Reverse Transcriptase Polymerase Chain Reaction
- Serum Albumin, Bovine/chemistry
- Serum Albumin, Bovine/pharmacology
- Sirtuin 1/genetics
- Sirtuin 1/metabolism
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Affiliation(s)
- Peter Y Chuang
- Division of Nephrology, Department of Medicine, Mount Sinai School of Medicine, New York, New York, United States of America.
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49
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Gödel M, Hartleben B, Herbach N, Liu S, Zschiedrich S, Lu S, Debreczeni-Mór A, Lindenmeyer MT, Rastaldi MP, Hartleben G, Wiech T, Fornoni A, Nelson RG, Kretzler M, Wanke R, Pavenstädt H, Kerjaschki D, Cohen CD, Hall MN, Rüegg MA, Inoki K, Walz G, Huber TB. Role of mTOR in podocyte function and diabetic nephropathy in humans and mice. J Clin Invest 2011; 121:2197-209. [PMID: 21606591 PMCID: PMC3104746 DOI: 10.1172/jci44774] [Citation(s) in RCA: 434] [Impact Index Per Article: 33.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/16/2010] [Accepted: 03/08/2011] [Indexed: 02/06/2023] Open
Abstract
Chronic glomerular diseases, associated with renal failure and cardiovascular morbidity, represent a major health issue. However, they remain poorly understood. Here we have reported that tightly controlled mTOR activity was crucial to maintaining glomerular podocyte function, while dysregulation of mTOR facilitated glomerular diseases. Genetic deletion of mTOR complex 1 (mTORC1) in mouse podocytes induced proteinuria and progressive glomerulosclerosis. Furthermore, simultaneous deletion of both mTORC1 and mTORC2 from mouse podocytes aggravated the glomerular lesions, revealing the importance of both mTOR complexes for podocyte homeostasis. In contrast, increased mTOR activity accompanied human diabetic nephropathy, characterized by early glomerular hypertrophy and hyperfiltration. Curtailing mTORC1 signaling in mice by genetically reducing mTORC1 copy number in podocytes prevented glomerulosclerosis and significantly ameliorated the progression of glomerular disease in diabetic nephropathy. These results demonstrate the requirement for tightly balanced mTOR activity in podocyte homeostasis and suggest that mTOR inhibition can protect podocytes and prevent progressive diabetic nephropathy.
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Affiliation(s)
- Markus Gödel
- Renal Division, University Hospital Freiburg, Freiburg, Germany.
Institute of Veterinary Pathology, Centre for Clinical Veterinary Medicine, Ludwig-Maximilians-University, München, Germany.
Spemann Graduate School of Biology and Medicine, Albert-Ludwigs-University, Freiburg, Germany.
Division of Nephrology and Institute of Physiology, University Hospital and University of Zürich, Zürich, Switzerland.
Renal Research Laboratory, Fondazione IRCCS Ospedale Maggiore Policlinico and Fondazione D’Amico, Milan, Italy.
Leibniz Institute for Age Research, Fritz Lipmann Institute, Jena, Germany.
Department of Pathology, University Hospital Freiburg, Freiburg, Germany.
Diabetes Research Institute, L. Miller School of Medicine, University of Miami, Miami, Florida, USA.
National Institute of Diabetes and Digestive and Kidney Diseases, NIH, Phoenix, Arizona, USA.
Internal Medicine, Division of Nephrology, University of Michigan, Ann Arbor, Michigan, USA.
Department of Medicine D, University Hospital Münster, Münster, Germany.
Department of Pathology, Medical University of Vienna, Wien, Austria.
Biozentrum, University of Basel, Basel, Switzerland.
Life Sciences Institute, Department of Molecular and Integrative Physiology, and Division of Nephology, Internal Medicine, University of Michigan, Ann Arbor, Michigan, USA.
BIOSS Centre for Biological Signalling Studies, Albert-Ludwigs-University, Freiburg, Germany
| | - Björn Hartleben
- Renal Division, University Hospital Freiburg, Freiburg, Germany.
Institute of Veterinary Pathology, Centre for Clinical Veterinary Medicine, Ludwig-Maximilians-University, München, Germany.
Spemann Graduate School of Biology and Medicine, Albert-Ludwigs-University, Freiburg, Germany.
Division of Nephrology and Institute of Physiology, University Hospital and University of Zürich, Zürich, Switzerland.
Renal Research Laboratory, Fondazione IRCCS Ospedale Maggiore Policlinico and Fondazione D’Amico, Milan, Italy.
Leibniz Institute for Age Research, Fritz Lipmann Institute, Jena, Germany.
Department of Pathology, University Hospital Freiburg, Freiburg, Germany.
Diabetes Research Institute, L. Miller School of Medicine, University of Miami, Miami, Florida, USA.
National Institute of Diabetes and Digestive and Kidney Diseases, NIH, Phoenix, Arizona, USA.
Internal Medicine, Division of Nephrology, University of Michigan, Ann Arbor, Michigan, USA.
Department of Medicine D, University Hospital Münster, Münster, Germany.
Department of Pathology, Medical University of Vienna, Wien, Austria.
Biozentrum, University of Basel, Basel, Switzerland.
Life Sciences Institute, Department of Molecular and Integrative Physiology, and Division of Nephology, Internal Medicine, University of Michigan, Ann Arbor, Michigan, USA.
BIOSS Centre for Biological Signalling Studies, Albert-Ludwigs-University, Freiburg, Germany
| | - Nadja Herbach
- Renal Division, University Hospital Freiburg, Freiburg, Germany.
Institute of Veterinary Pathology, Centre for Clinical Veterinary Medicine, Ludwig-Maximilians-University, München, Germany.
Spemann Graduate School of Biology and Medicine, Albert-Ludwigs-University, Freiburg, Germany.
Division of Nephrology and Institute of Physiology, University Hospital and University of Zürich, Zürich, Switzerland.
Renal Research Laboratory, Fondazione IRCCS Ospedale Maggiore Policlinico and Fondazione D’Amico, Milan, Italy.
Leibniz Institute for Age Research, Fritz Lipmann Institute, Jena, Germany.
Department of Pathology, University Hospital Freiburg, Freiburg, Germany.
Diabetes Research Institute, L. Miller School of Medicine, University of Miami, Miami, Florida, USA.
National Institute of Diabetes and Digestive and Kidney Diseases, NIH, Phoenix, Arizona, USA.
Internal Medicine, Division of Nephrology, University of Michigan, Ann Arbor, Michigan, USA.
Department of Medicine D, University Hospital Münster, Münster, Germany.
Department of Pathology, Medical University of Vienna, Wien, Austria.
Biozentrum, University of Basel, Basel, Switzerland.
Life Sciences Institute, Department of Molecular and Integrative Physiology, and Division of Nephology, Internal Medicine, University of Michigan, Ann Arbor, Michigan, USA.
BIOSS Centre for Biological Signalling Studies, Albert-Ludwigs-University, Freiburg, Germany
| | - Shuya Liu
- Renal Division, University Hospital Freiburg, Freiburg, Germany.
Institute of Veterinary Pathology, Centre for Clinical Veterinary Medicine, Ludwig-Maximilians-University, München, Germany.
Spemann Graduate School of Biology and Medicine, Albert-Ludwigs-University, Freiburg, Germany.
Division of Nephrology and Institute of Physiology, University Hospital and University of Zürich, Zürich, Switzerland.
Renal Research Laboratory, Fondazione IRCCS Ospedale Maggiore Policlinico and Fondazione D’Amico, Milan, Italy.
Leibniz Institute for Age Research, Fritz Lipmann Institute, Jena, Germany.
Department of Pathology, University Hospital Freiburg, Freiburg, Germany.
Diabetes Research Institute, L. Miller School of Medicine, University of Miami, Miami, Florida, USA.
National Institute of Diabetes and Digestive and Kidney Diseases, NIH, Phoenix, Arizona, USA.
Internal Medicine, Division of Nephrology, University of Michigan, Ann Arbor, Michigan, USA.
Department of Medicine D, University Hospital Münster, Münster, Germany.
Department of Pathology, Medical University of Vienna, Wien, Austria.
Biozentrum, University of Basel, Basel, Switzerland.
Life Sciences Institute, Department of Molecular and Integrative Physiology, and Division of Nephology, Internal Medicine, University of Michigan, Ann Arbor, Michigan, USA.
BIOSS Centre for Biological Signalling Studies, Albert-Ludwigs-University, Freiburg, Germany
| | - Stefan Zschiedrich
- Renal Division, University Hospital Freiburg, Freiburg, Germany.
Institute of Veterinary Pathology, Centre for Clinical Veterinary Medicine, Ludwig-Maximilians-University, München, Germany.
Spemann Graduate School of Biology and Medicine, Albert-Ludwigs-University, Freiburg, Germany.
Division of Nephrology and Institute of Physiology, University Hospital and University of Zürich, Zürich, Switzerland.
Renal Research Laboratory, Fondazione IRCCS Ospedale Maggiore Policlinico and Fondazione D’Amico, Milan, Italy.
Leibniz Institute for Age Research, Fritz Lipmann Institute, Jena, Germany.
Department of Pathology, University Hospital Freiburg, Freiburg, Germany.
Diabetes Research Institute, L. Miller School of Medicine, University of Miami, Miami, Florida, USA.
National Institute of Diabetes and Digestive and Kidney Diseases, NIH, Phoenix, Arizona, USA.
Internal Medicine, Division of Nephrology, University of Michigan, Ann Arbor, Michigan, USA.
Department of Medicine D, University Hospital Münster, Münster, Germany.
Department of Pathology, Medical University of Vienna, Wien, Austria.
Biozentrum, University of Basel, Basel, Switzerland.
Life Sciences Institute, Department of Molecular and Integrative Physiology, and Division of Nephology, Internal Medicine, University of Michigan, Ann Arbor, Michigan, USA.
BIOSS Centre for Biological Signalling Studies, Albert-Ludwigs-University, Freiburg, Germany
| | - Shun Lu
- Renal Division, University Hospital Freiburg, Freiburg, Germany.
Institute of Veterinary Pathology, Centre for Clinical Veterinary Medicine, Ludwig-Maximilians-University, München, Germany.
Spemann Graduate School of Biology and Medicine, Albert-Ludwigs-University, Freiburg, Germany.
Division of Nephrology and Institute of Physiology, University Hospital and University of Zürich, Zürich, Switzerland.
Renal Research Laboratory, Fondazione IRCCS Ospedale Maggiore Policlinico and Fondazione D’Amico, Milan, Italy.
Leibniz Institute for Age Research, Fritz Lipmann Institute, Jena, Germany.
Department of Pathology, University Hospital Freiburg, Freiburg, Germany.
Diabetes Research Institute, L. Miller School of Medicine, University of Miami, Miami, Florida, USA.
National Institute of Diabetes and Digestive and Kidney Diseases, NIH, Phoenix, Arizona, USA.
Internal Medicine, Division of Nephrology, University of Michigan, Ann Arbor, Michigan, USA.
Department of Medicine D, University Hospital Münster, Münster, Germany.
Department of Pathology, Medical University of Vienna, Wien, Austria.
Biozentrum, University of Basel, Basel, Switzerland.
Life Sciences Institute, Department of Molecular and Integrative Physiology, and Division of Nephology, Internal Medicine, University of Michigan, Ann Arbor, Michigan, USA.
BIOSS Centre for Biological Signalling Studies, Albert-Ludwigs-University, Freiburg, Germany
| | - Andrea Debreczeni-Mór
- Renal Division, University Hospital Freiburg, Freiburg, Germany.
Institute of Veterinary Pathology, Centre for Clinical Veterinary Medicine, Ludwig-Maximilians-University, München, Germany.
Spemann Graduate School of Biology and Medicine, Albert-Ludwigs-University, Freiburg, Germany.
Division of Nephrology and Institute of Physiology, University Hospital and University of Zürich, Zürich, Switzerland.
Renal Research Laboratory, Fondazione IRCCS Ospedale Maggiore Policlinico and Fondazione D’Amico, Milan, Italy.
Leibniz Institute for Age Research, Fritz Lipmann Institute, Jena, Germany.
Department of Pathology, University Hospital Freiburg, Freiburg, Germany.
Diabetes Research Institute, L. Miller School of Medicine, University of Miami, Miami, Florida, USA.
National Institute of Diabetes and Digestive and Kidney Diseases, NIH, Phoenix, Arizona, USA.
Internal Medicine, Division of Nephrology, University of Michigan, Ann Arbor, Michigan, USA.
Department of Medicine D, University Hospital Münster, Münster, Germany.
Department of Pathology, Medical University of Vienna, Wien, Austria.
Biozentrum, University of Basel, Basel, Switzerland.
Life Sciences Institute, Department of Molecular and Integrative Physiology, and Division of Nephology, Internal Medicine, University of Michigan, Ann Arbor, Michigan, USA.
BIOSS Centre for Biological Signalling Studies, Albert-Ludwigs-University, Freiburg, Germany
| | - Maja T. Lindenmeyer
- Renal Division, University Hospital Freiburg, Freiburg, Germany.
Institute of Veterinary Pathology, Centre for Clinical Veterinary Medicine, Ludwig-Maximilians-University, München, Germany.
Spemann Graduate School of Biology and Medicine, Albert-Ludwigs-University, Freiburg, Germany.
Division of Nephrology and Institute of Physiology, University Hospital and University of Zürich, Zürich, Switzerland.
Renal Research Laboratory, Fondazione IRCCS Ospedale Maggiore Policlinico and Fondazione D’Amico, Milan, Italy.
Leibniz Institute for Age Research, Fritz Lipmann Institute, Jena, Germany.
Department of Pathology, University Hospital Freiburg, Freiburg, Germany.
Diabetes Research Institute, L. Miller School of Medicine, University of Miami, Miami, Florida, USA.
National Institute of Diabetes and Digestive and Kidney Diseases, NIH, Phoenix, Arizona, USA.
Internal Medicine, Division of Nephrology, University of Michigan, Ann Arbor, Michigan, USA.
Department of Medicine D, University Hospital Münster, Münster, Germany.
Department of Pathology, Medical University of Vienna, Wien, Austria.
Biozentrum, University of Basel, Basel, Switzerland.
Life Sciences Institute, Department of Molecular and Integrative Physiology, and Division of Nephology, Internal Medicine, University of Michigan, Ann Arbor, Michigan, USA.
BIOSS Centre for Biological Signalling Studies, Albert-Ludwigs-University, Freiburg, Germany
| | - Maria-Pia Rastaldi
- Renal Division, University Hospital Freiburg, Freiburg, Germany.
Institute of Veterinary Pathology, Centre for Clinical Veterinary Medicine, Ludwig-Maximilians-University, München, Germany.
Spemann Graduate School of Biology and Medicine, Albert-Ludwigs-University, Freiburg, Germany.
Division of Nephrology and Institute of Physiology, University Hospital and University of Zürich, Zürich, Switzerland.
Renal Research Laboratory, Fondazione IRCCS Ospedale Maggiore Policlinico and Fondazione D’Amico, Milan, Italy.
Leibniz Institute for Age Research, Fritz Lipmann Institute, Jena, Germany.
Department of Pathology, University Hospital Freiburg, Freiburg, Germany.
Diabetes Research Institute, L. Miller School of Medicine, University of Miami, Miami, Florida, USA.
National Institute of Diabetes and Digestive and Kidney Diseases, NIH, Phoenix, Arizona, USA.
Internal Medicine, Division of Nephrology, University of Michigan, Ann Arbor, Michigan, USA.
Department of Medicine D, University Hospital Münster, Münster, Germany.
Department of Pathology, Medical University of Vienna, Wien, Austria.
Biozentrum, University of Basel, Basel, Switzerland.
Life Sciences Institute, Department of Molecular and Integrative Physiology, and Division of Nephology, Internal Medicine, University of Michigan, Ann Arbor, Michigan, USA.
BIOSS Centre for Biological Signalling Studies, Albert-Ludwigs-University, Freiburg, Germany
| | - Götz Hartleben
- Renal Division, University Hospital Freiburg, Freiburg, Germany.
Institute of Veterinary Pathology, Centre for Clinical Veterinary Medicine, Ludwig-Maximilians-University, München, Germany.
Spemann Graduate School of Biology and Medicine, Albert-Ludwigs-University, Freiburg, Germany.
Division of Nephrology and Institute of Physiology, University Hospital and University of Zürich, Zürich, Switzerland.
Renal Research Laboratory, Fondazione IRCCS Ospedale Maggiore Policlinico and Fondazione D’Amico, Milan, Italy.
Leibniz Institute for Age Research, Fritz Lipmann Institute, Jena, Germany.
Department of Pathology, University Hospital Freiburg, Freiburg, Germany.
Diabetes Research Institute, L. Miller School of Medicine, University of Miami, Miami, Florida, USA.
National Institute of Diabetes and Digestive and Kidney Diseases, NIH, Phoenix, Arizona, USA.
Internal Medicine, Division of Nephrology, University of Michigan, Ann Arbor, Michigan, USA.
Department of Medicine D, University Hospital Münster, Münster, Germany.
Department of Pathology, Medical University of Vienna, Wien, Austria.
Biozentrum, University of Basel, Basel, Switzerland.
Life Sciences Institute, Department of Molecular and Integrative Physiology, and Division of Nephology, Internal Medicine, University of Michigan, Ann Arbor, Michigan, USA.
BIOSS Centre for Biological Signalling Studies, Albert-Ludwigs-University, Freiburg, Germany
| | - Thorsten Wiech
- Renal Division, University Hospital Freiburg, Freiburg, Germany.
Institute of Veterinary Pathology, Centre for Clinical Veterinary Medicine, Ludwig-Maximilians-University, München, Germany.
Spemann Graduate School of Biology and Medicine, Albert-Ludwigs-University, Freiburg, Germany.
Division of Nephrology and Institute of Physiology, University Hospital and University of Zürich, Zürich, Switzerland.
Renal Research Laboratory, Fondazione IRCCS Ospedale Maggiore Policlinico and Fondazione D’Amico, Milan, Italy.
Leibniz Institute for Age Research, Fritz Lipmann Institute, Jena, Germany.
Department of Pathology, University Hospital Freiburg, Freiburg, Germany.
Diabetes Research Institute, L. Miller School of Medicine, University of Miami, Miami, Florida, USA.
National Institute of Diabetes and Digestive and Kidney Diseases, NIH, Phoenix, Arizona, USA.
Internal Medicine, Division of Nephrology, University of Michigan, Ann Arbor, Michigan, USA.
Department of Medicine D, University Hospital Münster, Münster, Germany.
Department of Pathology, Medical University of Vienna, Wien, Austria.
Biozentrum, University of Basel, Basel, Switzerland.
Life Sciences Institute, Department of Molecular and Integrative Physiology, and Division of Nephology, Internal Medicine, University of Michigan, Ann Arbor, Michigan, USA.
BIOSS Centre for Biological Signalling Studies, Albert-Ludwigs-University, Freiburg, Germany
| | - Alessia Fornoni
- Renal Division, University Hospital Freiburg, Freiburg, Germany.
Institute of Veterinary Pathology, Centre for Clinical Veterinary Medicine, Ludwig-Maximilians-University, München, Germany.
Spemann Graduate School of Biology and Medicine, Albert-Ludwigs-University, Freiburg, Germany.
Division of Nephrology and Institute of Physiology, University Hospital and University of Zürich, Zürich, Switzerland.
Renal Research Laboratory, Fondazione IRCCS Ospedale Maggiore Policlinico and Fondazione D’Amico, Milan, Italy.
Leibniz Institute for Age Research, Fritz Lipmann Institute, Jena, Germany.
Department of Pathology, University Hospital Freiburg, Freiburg, Germany.
Diabetes Research Institute, L. Miller School of Medicine, University of Miami, Miami, Florida, USA.
National Institute of Diabetes and Digestive and Kidney Diseases, NIH, Phoenix, Arizona, USA.
Internal Medicine, Division of Nephrology, University of Michigan, Ann Arbor, Michigan, USA.
Department of Medicine D, University Hospital Münster, Münster, Germany.
Department of Pathology, Medical University of Vienna, Wien, Austria.
Biozentrum, University of Basel, Basel, Switzerland.
Life Sciences Institute, Department of Molecular and Integrative Physiology, and Division of Nephology, Internal Medicine, University of Michigan, Ann Arbor, Michigan, USA.
BIOSS Centre for Biological Signalling Studies, Albert-Ludwigs-University, Freiburg, Germany
| | - Robert G. Nelson
- Renal Division, University Hospital Freiburg, Freiburg, Germany.
Institute of Veterinary Pathology, Centre for Clinical Veterinary Medicine, Ludwig-Maximilians-University, München, Germany.
Spemann Graduate School of Biology and Medicine, Albert-Ludwigs-University, Freiburg, Germany.
Division of Nephrology and Institute of Physiology, University Hospital and University of Zürich, Zürich, Switzerland.
Renal Research Laboratory, Fondazione IRCCS Ospedale Maggiore Policlinico and Fondazione D’Amico, Milan, Italy.
Leibniz Institute for Age Research, Fritz Lipmann Institute, Jena, Germany.
Department of Pathology, University Hospital Freiburg, Freiburg, Germany.
Diabetes Research Institute, L. Miller School of Medicine, University of Miami, Miami, Florida, USA.
National Institute of Diabetes and Digestive and Kidney Diseases, NIH, Phoenix, Arizona, USA.
Internal Medicine, Division of Nephrology, University of Michigan, Ann Arbor, Michigan, USA.
Department of Medicine D, University Hospital Münster, Münster, Germany.
Department of Pathology, Medical University of Vienna, Wien, Austria.
Biozentrum, University of Basel, Basel, Switzerland.
Life Sciences Institute, Department of Molecular and Integrative Physiology, and Division of Nephology, Internal Medicine, University of Michigan, Ann Arbor, Michigan, USA.
BIOSS Centre for Biological Signalling Studies, Albert-Ludwigs-University, Freiburg, Germany
| | - Matthias Kretzler
- Renal Division, University Hospital Freiburg, Freiburg, Germany.
Institute of Veterinary Pathology, Centre for Clinical Veterinary Medicine, Ludwig-Maximilians-University, München, Germany.
Spemann Graduate School of Biology and Medicine, Albert-Ludwigs-University, Freiburg, Germany.
Division of Nephrology and Institute of Physiology, University Hospital and University of Zürich, Zürich, Switzerland.
Renal Research Laboratory, Fondazione IRCCS Ospedale Maggiore Policlinico and Fondazione D’Amico, Milan, Italy.
Leibniz Institute for Age Research, Fritz Lipmann Institute, Jena, Germany.
Department of Pathology, University Hospital Freiburg, Freiburg, Germany.
Diabetes Research Institute, L. Miller School of Medicine, University of Miami, Miami, Florida, USA.
National Institute of Diabetes and Digestive and Kidney Diseases, NIH, Phoenix, Arizona, USA.
Internal Medicine, Division of Nephrology, University of Michigan, Ann Arbor, Michigan, USA.
Department of Medicine D, University Hospital Münster, Münster, Germany.
Department of Pathology, Medical University of Vienna, Wien, Austria.
Biozentrum, University of Basel, Basel, Switzerland.
Life Sciences Institute, Department of Molecular and Integrative Physiology, and Division of Nephology, Internal Medicine, University of Michigan, Ann Arbor, Michigan, USA.
BIOSS Centre for Biological Signalling Studies, Albert-Ludwigs-University, Freiburg, Germany
| | - Rüdiger Wanke
- Renal Division, University Hospital Freiburg, Freiburg, Germany.
Institute of Veterinary Pathology, Centre for Clinical Veterinary Medicine, Ludwig-Maximilians-University, München, Germany.
Spemann Graduate School of Biology and Medicine, Albert-Ludwigs-University, Freiburg, Germany.
Division of Nephrology and Institute of Physiology, University Hospital and University of Zürich, Zürich, Switzerland.
Renal Research Laboratory, Fondazione IRCCS Ospedale Maggiore Policlinico and Fondazione D’Amico, Milan, Italy.
Leibniz Institute for Age Research, Fritz Lipmann Institute, Jena, Germany.
Department of Pathology, University Hospital Freiburg, Freiburg, Germany.
Diabetes Research Institute, L. Miller School of Medicine, University of Miami, Miami, Florida, USA.
National Institute of Diabetes and Digestive and Kidney Diseases, NIH, Phoenix, Arizona, USA.
Internal Medicine, Division of Nephrology, University of Michigan, Ann Arbor, Michigan, USA.
Department of Medicine D, University Hospital Münster, Münster, Germany.
Department of Pathology, Medical University of Vienna, Wien, Austria.
Biozentrum, University of Basel, Basel, Switzerland.
Life Sciences Institute, Department of Molecular and Integrative Physiology, and Division of Nephology, Internal Medicine, University of Michigan, Ann Arbor, Michigan, USA.
BIOSS Centre for Biological Signalling Studies, Albert-Ludwigs-University, Freiburg, Germany
| | - Hermann Pavenstädt
- Renal Division, University Hospital Freiburg, Freiburg, Germany.
Institute of Veterinary Pathology, Centre for Clinical Veterinary Medicine, Ludwig-Maximilians-University, München, Germany.
Spemann Graduate School of Biology and Medicine, Albert-Ludwigs-University, Freiburg, Germany.
Division of Nephrology and Institute of Physiology, University Hospital and University of Zürich, Zürich, Switzerland.
Renal Research Laboratory, Fondazione IRCCS Ospedale Maggiore Policlinico and Fondazione D’Amico, Milan, Italy.
Leibniz Institute for Age Research, Fritz Lipmann Institute, Jena, Germany.
Department of Pathology, University Hospital Freiburg, Freiburg, Germany.
Diabetes Research Institute, L. Miller School of Medicine, University of Miami, Miami, Florida, USA.
National Institute of Diabetes and Digestive and Kidney Diseases, NIH, Phoenix, Arizona, USA.
Internal Medicine, Division of Nephrology, University of Michigan, Ann Arbor, Michigan, USA.
Department of Medicine D, University Hospital Münster, Münster, Germany.
Department of Pathology, Medical University of Vienna, Wien, Austria.
Biozentrum, University of Basel, Basel, Switzerland.
Life Sciences Institute, Department of Molecular and Integrative Physiology, and Division of Nephology, Internal Medicine, University of Michigan, Ann Arbor, Michigan, USA.
BIOSS Centre for Biological Signalling Studies, Albert-Ludwigs-University, Freiburg, Germany
| | - Dontscho Kerjaschki
- Renal Division, University Hospital Freiburg, Freiburg, Germany.
Institute of Veterinary Pathology, Centre for Clinical Veterinary Medicine, Ludwig-Maximilians-University, München, Germany.
Spemann Graduate School of Biology and Medicine, Albert-Ludwigs-University, Freiburg, Germany.
Division of Nephrology and Institute of Physiology, University Hospital and University of Zürich, Zürich, Switzerland.
Renal Research Laboratory, Fondazione IRCCS Ospedale Maggiore Policlinico and Fondazione D’Amico, Milan, Italy.
Leibniz Institute for Age Research, Fritz Lipmann Institute, Jena, Germany.
Department of Pathology, University Hospital Freiburg, Freiburg, Germany.
Diabetes Research Institute, L. Miller School of Medicine, University of Miami, Miami, Florida, USA.
National Institute of Diabetes and Digestive and Kidney Diseases, NIH, Phoenix, Arizona, USA.
Internal Medicine, Division of Nephrology, University of Michigan, Ann Arbor, Michigan, USA.
Department of Medicine D, University Hospital Münster, Münster, Germany.
Department of Pathology, Medical University of Vienna, Wien, Austria.
Biozentrum, University of Basel, Basel, Switzerland.
Life Sciences Institute, Department of Molecular and Integrative Physiology, and Division of Nephology, Internal Medicine, University of Michigan, Ann Arbor, Michigan, USA.
BIOSS Centre for Biological Signalling Studies, Albert-Ludwigs-University, Freiburg, Germany
| | - Clemens D. Cohen
- Renal Division, University Hospital Freiburg, Freiburg, Germany.
Institute of Veterinary Pathology, Centre for Clinical Veterinary Medicine, Ludwig-Maximilians-University, München, Germany.
Spemann Graduate School of Biology and Medicine, Albert-Ludwigs-University, Freiburg, Germany.
Division of Nephrology and Institute of Physiology, University Hospital and University of Zürich, Zürich, Switzerland.
Renal Research Laboratory, Fondazione IRCCS Ospedale Maggiore Policlinico and Fondazione D’Amico, Milan, Italy.
Leibniz Institute for Age Research, Fritz Lipmann Institute, Jena, Germany.
Department of Pathology, University Hospital Freiburg, Freiburg, Germany.
Diabetes Research Institute, L. Miller School of Medicine, University of Miami, Miami, Florida, USA.
National Institute of Diabetes and Digestive and Kidney Diseases, NIH, Phoenix, Arizona, USA.
Internal Medicine, Division of Nephrology, University of Michigan, Ann Arbor, Michigan, USA.
Department of Medicine D, University Hospital Münster, Münster, Germany.
Department of Pathology, Medical University of Vienna, Wien, Austria.
Biozentrum, University of Basel, Basel, Switzerland.
Life Sciences Institute, Department of Molecular and Integrative Physiology, and Division of Nephology, Internal Medicine, University of Michigan, Ann Arbor, Michigan, USA.
BIOSS Centre for Biological Signalling Studies, Albert-Ludwigs-University, Freiburg, Germany
| | - Michael N. Hall
- Renal Division, University Hospital Freiburg, Freiburg, Germany.
Institute of Veterinary Pathology, Centre for Clinical Veterinary Medicine, Ludwig-Maximilians-University, München, Germany.
Spemann Graduate School of Biology and Medicine, Albert-Ludwigs-University, Freiburg, Germany.
Division of Nephrology and Institute of Physiology, University Hospital and University of Zürich, Zürich, Switzerland.
Renal Research Laboratory, Fondazione IRCCS Ospedale Maggiore Policlinico and Fondazione D’Amico, Milan, Italy.
Leibniz Institute for Age Research, Fritz Lipmann Institute, Jena, Germany.
Department of Pathology, University Hospital Freiburg, Freiburg, Germany.
Diabetes Research Institute, L. Miller School of Medicine, University of Miami, Miami, Florida, USA.
National Institute of Diabetes and Digestive and Kidney Diseases, NIH, Phoenix, Arizona, USA.
Internal Medicine, Division of Nephrology, University of Michigan, Ann Arbor, Michigan, USA.
Department of Medicine D, University Hospital Münster, Münster, Germany.
Department of Pathology, Medical University of Vienna, Wien, Austria.
Biozentrum, University of Basel, Basel, Switzerland.
Life Sciences Institute, Department of Molecular and Integrative Physiology, and Division of Nephology, Internal Medicine, University of Michigan, Ann Arbor, Michigan, USA.
BIOSS Centre for Biological Signalling Studies, Albert-Ludwigs-University, Freiburg, Germany
| | - Markus A. Rüegg
- Renal Division, University Hospital Freiburg, Freiburg, Germany.
Institute of Veterinary Pathology, Centre for Clinical Veterinary Medicine, Ludwig-Maximilians-University, München, Germany.
Spemann Graduate School of Biology and Medicine, Albert-Ludwigs-University, Freiburg, Germany.
Division of Nephrology and Institute of Physiology, University Hospital and University of Zürich, Zürich, Switzerland.
Renal Research Laboratory, Fondazione IRCCS Ospedale Maggiore Policlinico and Fondazione D’Amico, Milan, Italy.
Leibniz Institute for Age Research, Fritz Lipmann Institute, Jena, Germany.
Department of Pathology, University Hospital Freiburg, Freiburg, Germany.
Diabetes Research Institute, L. Miller School of Medicine, University of Miami, Miami, Florida, USA.
National Institute of Diabetes and Digestive and Kidney Diseases, NIH, Phoenix, Arizona, USA.
Internal Medicine, Division of Nephrology, University of Michigan, Ann Arbor, Michigan, USA.
Department of Medicine D, University Hospital Münster, Münster, Germany.
Department of Pathology, Medical University of Vienna, Wien, Austria.
Biozentrum, University of Basel, Basel, Switzerland.
Life Sciences Institute, Department of Molecular and Integrative Physiology, and Division of Nephology, Internal Medicine, University of Michigan, Ann Arbor, Michigan, USA.
BIOSS Centre for Biological Signalling Studies, Albert-Ludwigs-University, Freiburg, Germany
| | - Ken Inoki
- Renal Division, University Hospital Freiburg, Freiburg, Germany.
Institute of Veterinary Pathology, Centre for Clinical Veterinary Medicine, Ludwig-Maximilians-University, München, Germany.
Spemann Graduate School of Biology and Medicine, Albert-Ludwigs-University, Freiburg, Germany.
Division of Nephrology and Institute of Physiology, University Hospital and University of Zürich, Zürich, Switzerland.
Renal Research Laboratory, Fondazione IRCCS Ospedale Maggiore Policlinico and Fondazione D’Amico, Milan, Italy.
Leibniz Institute for Age Research, Fritz Lipmann Institute, Jena, Germany.
Department of Pathology, University Hospital Freiburg, Freiburg, Germany.
Diabetes Research Institute, L. Miller School of Medicine, University of Miami, Miami, Florida, USA.
National Institute of Diabetes and Digestive and Kidney Diseases, NIH, Phoenix, Arizona, USA.
Internal Medicine, Division of Nephrology, University of Michigan, Ann Arbor, Michigan, USA.
Department of Medicine D, University Hospital Münster, Münster, Germany.
Department of Pathology, Medical University of Vienna, Wien, Austria.
Biozentrum, University of Basel, Basel, Switzerland.
Life Sciences Institute, Department of Molecular and Integrative Physiology, and Division of Nephology, Internal Medicine, University of Michigan, Ann Arbor, Michigan, USA.
BIOSS Centre for Biological Signalling Studies, Albert-Ludwigs-University, Freiburg, Germany
| | - Gerd Walz
- Renal Division, University Hospital Freiburg, Freiburg, Germany.
Institute of Veterinary Pathology, Centre for Clinical Veterinary Medicine, Ludwig-Maximilians-University, München, Germany.
Spemann Graduate School of Biology and Medicine, Albert-Ludwigs-University, Freiburg, Germany.
Division of Nephrology and Institute of Physiology, University Hospital and University of Zürich, Zürich, Switzerland.
Renal Research Laboratory, Fondazione IRCCS Ospedale Maggiore Policlinico and Fondazione D’Amico, Milan, Italy.
Leibniz Institute for Age Research, Fritz Lipmann Institute, Jena, Germany.
Department of Pathology, University Hospital Freiburg, Freiburg, Germany.
Diabetes Research Institute, L. Miller School of Medicine, University of Miami, Miami, Florida, USA.
National Institute of Diabetes and Digestive and Kidney Diseases, NIH, Phoenix, Arizona, USA.
Internal Medicine, Division of Nephrology, University of Michigan, Ann Arbor, Michigan, USA.
Department of Medicine D, University Hospital Münster, Münster, Germany.
Department of Pathology, Medical University of Vienna, Wien, Austria.
Biozentrum, University of Basel, Basel, Switzerland.
Life Sciences Institute, Department of Molecular and Integrative Physiology, and Division of Nephology, Internal Medicine, University of Michigan, Ann Arbor, Michigan, USA.
BIOSS Centre for Biological Signalling Studies, Albert-Ludwigs-University, Freiburg, Germany
| | - Tobias B. Huber
- Renal Division, University Hospital Freiburg, Freiburg, Germany.
Institute of Veterinary Pathology, Centre for Clinical Veterinary Medicine, Ludwig-Maximilians-University, München, Germany.
Spemann Graduate School of Biology and Medicine, Albert-Ludwigs-University, Freiburg, Germany.
Division of Nephrology and Institute of Physiology, University Hospital and University of Zürich, Zürich, Switzerland.
Renal Research Laboratory, Fondazione IRCCS Ospedale Maggiore Policlinico and Fondazione D’Amico, Milan, Italy.
Leibniz Institute for Age Research, Fritz Lipmann Institute, Jena, Germany.
Department of Pathology, University Hospital Freiburg, Freiburg, Germany.
Diabetes Research Institute, L. Miller School of Medicine, University of Miami, Miami, Florida, USA.
National Institute of Diabetes and Digestive and Kidney Diseases, NIH, Phoenix, Arizona, USA.
Internal Medicine, Division of Nephrology, University of Michigan, Ann Arbor, Michigan, USA.
Department of Medicine D, University Hospital Münster, Münster, Germany.
Department of Pathology, Medical University of Vienna, Wien, Austria.
Biozentrum, University of Basel, Basel, Switzerland.
Life Sciences Institute, Department of Molecular and Integrative Physiology, and Division of Nephology, Internal Medicine, University of Michigan, Ann Arbor, Michigan, USA.
BIOSS Centre for Biological Signalling Studies, Albert-Ludwigs-University, Freiburg, Germany
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Nelson PJ, von Toerne C, Gröne HJ. Wnt-signaling pathways in progressive renal fibrosis. Expert Opin Ther Targets 2011; 15:1073-83. [PMID: 21623684 DOI: 10.1517/14728222.2011.588210] [Citation(s) in RCA: 27] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Abstract
INTRODUCTION The prevention and potential reversal of interstitial fibrosis is a central strategy for the treatment of progressive renal disease. This strategy requires a better understanding of the underlying pathophysiologic processes involved in progressive renal fibrosis. AREAS COVERED The developmental processes in which Wnt (combination of 'wingless' and 'INT')/frizzled signaling is involved is discussed in this review, including cell fate determination, cell polarity, tissue patterning and control of cell proliferation. These pathways are also active in the adult where they play key roles in the maintenance of tissue homeostasis, wound repair and chronic tissue damage. EXPERT OPINION Wnt biology helps to control cell polarity, moderates cell proliferation and underlies other processes linked to renal homeostasis. Reactivation and dysregulation of the Wnt pathways underlie chronic fibrosis and progressive renal failure. Wnt signaling is, however, context-dependent: the pathways are complex and undergo many levels of cross-talk with other regulatory systems and regulatory pathways. On one hand, this may help to explain the positive effects of Wnt-signaling blockades seen in some animal models of chronic renal damage and, on the other, this suggests that it may be difficult to predict how modifications of the Wnt pathway may influence a process.
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Affiliation(s)
- Peter J Nelson
- Ludwig-Maximilians University, Medical Policlinic, Clinical Biochemistry Group, Munich, Germany.
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