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Wu Q, Huang F. LncRNA H19: a novel player in the regulation of diabetic kidney disease. Front Endocrinol (Lausanne) 2023; 14:1238981. [PMID: 37964955 PMCID: PMC10641825 DOI: 10.3389/fendo.2023.1238981] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/12/2023] [Accepted: 10/16/2023] [Indexed: 11/16/2023] Open
Abstract
Diabetic kidney disease (DKD), one of the most severe complications of diabetes mellitus (DM), has received considerable attention owing to its increasing prevalence and contribution to chronic kidney disease (CKD) and end-stage kidney disease (ESRD). However, the use of drugs targeting DKD remains limited. Recent data suggest that long non-coding RNAs (lncRNAs) play a vital role in the development of DKD. The lncRNA H19 is the first imprinted gene, which is expressed in the embryo and down-regulated at birth, and its role in tumors has long been a subject of controversy, however, in recent years, it has received increasing attention in kidney disease. The LncRNA H19 is engaged in the pathological progression of DKD, including glomerulosclerosis and tubulointerstitial fibrosis via the induction of inflammatory responses, apoptosis, ferroptosis, pyroptosis, autophagy, and oxidative damage. In this review, we highlight the most recent research on the molecular mechanism and regulatory forms of lncRNA H19 in DKD, including epigenetic, post-transcriptional, and post-translational regulation, providing a new predictive marker and therapeutic target for the management of DKD.
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Affiliation(s)
| | - Fengjuan Huang
- Department of Endocrinology and Metabolism, The First Affiliated Hospital of Zhengzhou University, Zhengzhou, China
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2
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Raimundo JRS, da Costa Aguiar Alves B, Encinas JFA, Siqueira AM, de Gois KC, Perez MM, Petri G, Dos Santos JFR, Fonseca FLA, da Veiga GL. Expression of TNFR1, VEGFA, CD147 and MCT1 as early biomarkers of diabetes complications and the impact of aging on this profile. Sci Rep 2023; 13:17927. [PMID: 37863950 PMCID: PMC10589356 DOI: 10.1038/s41598-023-41061-0] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/05/2023] [Accepted: 08/21/2023] [Indexed: 10/22/2023] Open
Abstract
Hyperglycemia leads to microvascular lesions in various tissues. In diabetic nephropathy-DN, alterations in usual markers reflect an already installed disease. The study of new biomarkers for the early detection of diabetic complications can bring new prevention perspectives. Rats were divided into diabetic adult-DMA-or elderly-DME and control sham adult-CSA-or control sham elderly-CSE. Blood and urine samples were collected for biochemical analysis. Bulbar region, cardiac, hepatic and renal tissues were collected for target gene expression studies. As result, DMA showed decreased TNFR1, MCT1 and CD147 expression in the bulbar region, TNFR1 in the heart, VEGFA and CD147 in the kidney and TNFR1 in blood. Positive correlations were found between TNFR1 and MCT1 in the bulbar region and HbA1c and plasma creatinine, respectively. DME showed positive correlation in the bulbar region between TNFR1 and glycemia, in addition to negative correlations between CD147 in the heart versus glycemia and urea. We concluded that the initial hyperglycemic stimulus already promotes changes in the expression of genes involved in the inflammatory and metabolic pathways, and aging alters this profile. These changes prior to the onset of diseases such as DN, show that they have potential for early biomarkers studies.
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Affiliation(s)
- Joyce Regina Santos Raimundo
- Laboratório de Análises Clínicas do Centro Universitário-Faculdade de Medicina do ABC (FMABC), Avenida Lauro Gomes, 2000, Santo André, SP, 09060-650, Brazil.
| | - Beatriz da Costa Aguiar Alves
- Laboratório de Análises Clínicas do Centro Universitário-Faculdade de Medicina do ABC (FMABC), Avenida Lauro Gomes, 2000, Santo André, SP, 09060-650, Brazil
| | - Jéssica Freitas Araujo Encinas
- Laboratório de Análises Clínicas do Centro Universitário-Faculdade de Medicina do ABC (FMABC), Avenida Lauro Gomes, 2000, Santo André, SP, 09060-650, Brazil
| | - Andressa Moreira Siqueira
- Laboratório de Análises Clínicas do Centro Universitário-Faculdade de Medicina do ABC (FMABC), Avenida Lauro Gomes, 2000, Santo André, SP, 09060-650, Brazil
| | - Katharyna Cardoso de Gois
- Laboratório de Análises Clínicas do Centro Universitário-Faculdade de Medicina do ABC (FMABC), Avenida Lauro Gomes, 2000, Santo André, SP, 09060-650, Brazil
| | - Matheus Moreira Perez
- Laboratório de Análises Clínicas do Centro Universitário-Faculdade de Medicina do ABC (FMABC), Avenida Lauro Gomes, 2000, Santo André, SP, 09060-650, Brazil
| | - Giuliana Petri
- Vivarium and Animal Experimentation Laboratory-Faculdade de Medicina Do ABC (FMABC), Avenida Lauro Gomes, 2000, Santo André, SP, 09060-650, Brazil
| | - José Francisco Ramos Dos Santos
- Vivarium and Animal Experimentation Laboratory-Faculdade de Medicina Do ABC (FMABC), Avenida Lauro Gomes, 2000, Santo André, SP, 09060-650, Brazil
| | - Fernando Luiz Affonso Fonseca
- Laboratório de Análises Clínicas do Centro Universitário-Faculdade de Medicina do ABC (FMABC), Avenida Lauro Gomes, 2000, Santo André, SP, 09060-650, Brazil
- Departamento de Ciências Farmacêuticas da Universidade Federal de São Paulo/UNIFESP, Campus Diadema, Rua Prof. Artur Riedel, 275, Diadema, SP, 09972-270, Brazil
| | - Glaucia Luciano da Veiga
- Laboratório de Análises Clínicas do Centro Universitário-Faculdade de Medicina do ABC (FMABC), Avenida Lauro Gomes, 2000, Santo André, SP, 09060-650, Brazil
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Kunke M, Knöfler H, Dahlke E, Zanon Rodriguez L, Böttner M, Larionov A, Saudenova M, Ohrenschall GM, Westermann M, Porubsky S, Bernardes JP, Häsler R, Magnin JL, Koepsell H, Jouret F, Theilig F. Targeted deletion of von-Hippel-Lindau in the proximal tubule conditions the kidney against early diabetic kidney disease. Cell Death Dis 2023; 14:562. [PMID: 37626062 PMCID: PMC10457389 DOI: 10.1038/s41419-023-06074-7] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/19/2023] [Revised: 08/01/2023] [Accepted: 08/15/2023] [Indexed: 08/27/2023]
Abstract
Diabetic kidney disease (DKD) is the leading cause of end-stage renal disease. Glomerular hyperfiltration and albuminuria subject the proximal tubule (PT) to a subsequent elevation of workload, growth, and hypoxia. Hypoxia plays an ambiguous role in the development and progression of DKD and shall be clarified in our study. PT-von-Hippel-Lindau (Vhl)-deleted mouse model in combination with streptozotocin (STZ)-induced type I diabetes mellitus (DM) was phenotyped. In contrary to PT-Vhl-deleted STZ-induced type 1 DM mice, proteinuria and glomerular hyperfiltration occurred in diabetic control mice the latter due to higher nitric oxide synthase 1 and sodium and glucose transporter expression. PT Vhl deletion and DKD share common alterations in gene expression profiles, including glomerular and tubular morphology, and tubular transport and metabolism. Compared to diabetic control mice, the most significantly altered in PT Vhl-deleted STZ-induced type 1 DM mice were Ldc-1, regulating cellular oxygen consumption rate, and Zbtb16, inhibiting autophagy. Alignment of altered genes in heat maps uncovered that Vhl deletion prior to STZ-induced DM preconditioned the kidney against DKD. HIF-1α stabilization leading to histone modification and chromatin remodeling resets most genes altered upon DKD towards the control level. These data demonstrate that PT HIF-1α stabilization is a hallmark of early DKD and that targeting hypoxia prior to the onset of type 1 DM normalizes renal cell homeostasis and prevents DKD development.
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Affiliation(s)
- Madlen Kunke
- Institute of Anatomy, Christian Albrechts-University Kiel, Kiel, Germany
| | - Hannah Knöfler
- Institute of Anatomy, Christian Albrechts-University Kiel, Kiel, Germany
| | - Eileen Dahlke
- Institute of Anatomy, Christian Albrechts-University Kiel, Kiel, Germany
| | | | - Martina Böttner
- Institute of Anatomy, Christian Albrechts-University Kiel, Kiel, Germany
| | - Alexey Larionov
- Institute of Anatomy, Department of Medicine, University of Fribourg, Fribourg, Switzerland
| | | | | | | | | | - Joana P Bernardes
- Department of Dermatology and Allergy, University Hospital Schleswig-Holstein, Kiel, Germany
| | - Robert Häsler
- Department of Dermatology and Allergy, University Hospital Schleswig-Holstein, Kiel, Germany
| | | | - Hermann Koepsell
- Institute of Anatomy and Cell Biology, Julius-Maximilians-University of Würzburg, Würzburg, Germany
| | - François Jouret
- Groupe Interdisciplinaire de Génoprotéomique Appliquée (GIGA), Cardiovascular Sciences, University of Liège (ULiège), Liège, Belgium
- Division of Nephrology, CHU of Liège, University of Liège (CHU ULiège), Liège, Belgium
| | - Franziska Theilig
- Institute of Anatomy, Christian Albrechts-University Kiel, Kiel, Germany.
- Institute of Anatomy, Department of Medicine, University of Fribourg, Fribourg, Switzerland.
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4
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Liang Y, Liang Z, Huang J, Jia M, Liu D, Zhang P, Fang Z, Hu X, Li H. Identification and validation of aging-related gene signatures and their immune landscape in diabetic nephropathy. Front Med (Lausanne) 2023; 10:1158166. [PMID: 37404805 PMCID: PMC10316791 DOI: 10.3389/fmed.2023.1158166] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/06/2023] [Accepted: 05/24/2023] [Indexed: 07/06/2023] Open
Abstract
Background Aging and immune infiltration have essential role in the physiopathological mechanisms of diabetic nephropathy (DN), but their relationship has not been systematically elucidated. We identified aging-related characteristic genes in DN and explored their immune landscape. Methods Four datasets from the Gene Expression Omnibus (GEO) database were screened for exploration and validation. Functional and pathway analysis was performed using Gene Set Enrichment Analysis (GSEA). Characteristic genes were obtained using a combination of Random Forest (RF) and Support Vector Machine Recursive Feature Elimination (SVM-RFE) algorithm. We evaluated and validated the diagnostic performance of the characteristic genes using receiver operating characteristic (ROC) curve, and the expression pattern of the characteristic genes was evaluated and validated. Single-Sample Gene Set Enrichment Analysis (ssGSEA) was adopted to assess immune cell infiltration in samples. Based on the TarBase database and the JASPAR repository, potential microRNAs and transcription factors were predicted to further elucidate the molecular regulatory mechanisms of the characteristic genes. Results A total of 14 differentially expressed genes related to aging were obtained, of which 10 were up-regulated and 4 were down-regulated. Models were constructed by the RF and SVM-RFE algorithms, contracted to three signature genes: EGF-containing fibulin-like extracellular matrix (EFEMP1), Growth hormone receptor (GHR), and Vascular endothelial growth factor A (VEGFA). The three genes showed good efficacy in three tested cohorts and consistent expression patterns in the glomerular test cohorts. Most immune cells were more infiltrated in the DN samples compared to the controls, and there was a negative correlation between the characteristic genes and most immune cell infiltration. 24 microRNAs were involved in the transcriptional regulation of multiple genes simultaneously, and Endothelial transcription factor GATA-2 (GATA2) had a potential regulatory effect on both GHR and VEGFA. Conclusion We identified a novel aging-related signature allowing assessment of diagnosis for DN patients, and further can be used to predict immune infiltration sensitivity.
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Affiliation(s)
- Yingchao Liang
- Graduate School of Guangzhou University of Traditional Chinese Medicine, Guangzhou, China
- The Fourth Clinical Medical College of Guangzhou University of Chinese Medicine, Shenzhen, China
| | - Zhiyi Liang
- Graduate School of Guangzhou University of Traditional Chinese Medicine, Guangzhou, China
- Guangdong Provincial Hospital of Integrated Traditional Chinese and Western Medicine Affiliated to Guangzhou University of Chinese Medicine, Foshan, China
| | - Jinxian Huang
- Graduate School of Guangzhou University of Traditional Chinese Medicine, Guangzhou, China
- The Fourth Clinical Medical College of Guangzhou University of Chinese Medicine, Shenzhen, China
| | - Mingjie Jia
- Graduate School of Guangzhou University of Traditional Chinese Medicine, Guangzhou, China
- The Fourth Clinical Medical College of Guangzhou University of Chinese Medicine, Shenzhen, China
| | - Deliang Liu
- Department of Endocrinology, Shenzhen Traditional Chinese Medicine Hospital, Shenzhen, China
| | - Pengxiang Zhang
- Graduate School of Guangzhou University of Traditional Chinese Medicine, Guangzhou, China
- The Fourth Clinical Medical College of Guangzhou University of Chinese Medicine, Shenzhen, China
| | - Zebin Fang
- Graduate School of Guangzhou University of Traditional Chinese Medicine, Guangzhou, China
- The Fourth Clinical Medical College of Guangzhou University of Chinese Medicine, Shenzhen, China
| | - Xinyu Hu
- Graduate School of Guangzhou University of Traditional Chinese Medicine, Guangzhou, China
- The Fourth Clinical Medical College of Guangzhou University of Chinese Medicine, Shenzhen, China
| | - Huilin Li
- Department of Endocrinology, Shenzhen Traditional Chinese Medicine Hospital, Shenzhen, China
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Chyła-Danił G, Sałaga-Zaleska K, Kreft E, Krzesińska A, Herman S, Kuchta A, Sakowicz-Burkiewicz M, Lenartowicz M, Jankowski M. Suramin Affects the Renal VEGF-A/VEGFR Axis in Short-Term Streptozotocin-Induced Diabetes. Pharmaceuticals (Basel) 2023; 16:ph16030470. [PMID: 36986570 PMCID: PMC10053825 DOI: 10.3390/ph16030470] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/21/2023] [Revised: 03/15/2023] [Accepted: 03/20/2023] [Indexed: 03/30/2023] Open
Abstract
Diabetic nephropathy (DN) accounts for approximately 50% of end-stage renal diseases. Vascular endothelial growth factor A (VEGF-A) is thought to be a critical mediator of vascular dysfunction in DN, but its role is unclear. The lack of pharmacological tools to modify renal concentrations further hinders the understanding of its role in DN. In this study, rats were evaluated after 3 weeks of streptozotocin-induced diabetes and two suramin treatments (10 mg/kg, ip). Vascular endothelial growth factor A expression was evaluated by western blot of glomeruli and immunofluorescence of the renal cortex. RT-PCR for receptors Vegfr1 mRNA and Vegfr2 mRNA quantitation was performed. The soluble adhesive molecules (sICAM-1, sVCAM-1) in blood were measured by ELISA and the vasoreactivity of interlobar arteries to acetylcholine was evaluated using wire myography. Suramin administration reduced the expression and intraglomerular localisation of VEGF-A. Increased VEGFR-2 expression in diabetes was reduced by suramin to non-diabetic levels. Diabetes reduced the sVCAM-1 concentrations. Suramin in diabetes restored acetylcholine relaxation properties to non-diabetic levels. In conclusion, suramin affects the renal VEGF-A/VEGF receptors axis and has a beneficial impact on endothelium-dependent relaxation of renal arteries. Thus, suramin may be used as a pharmacological agent to investigate the potential role of VEGF-A in the pathogenesis of renal vascular complications in short-term diabetes.
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Affiliation(s)
- Gabriela Chyła-Danił
- Department of Clinical Chemistry, Medical University of Gdańsk, Dębinki 7, 80-210 Gdańsk, Poland
| | - Kornelia Sałaga-Zaleska
- Department of Clinical Chemistry, Medical University of Gdańsk, Dębinki 7, 80-210 Gdańsk, Poland
| | - Ewelina Kreft
- Department of Clinical Chemistry, Medical University of Gdańsk, Dębinki 7, 80-210 Gdańsk, Poland
| | - Aleksandra Krzesińska
- Department of Clinical Chemistry, Medical University of Gdańsk, Dębinki 7, 80-210 Gdańsk, Poland
| | - Sylwia Herman
- Laboratory of Genetics and Evolutionism, Institute of Zoology and Biomedical Research, Jagiellonian University, Gronostajowa 9, 30-387 Kraków, Poland
| | - Agnieszka Kuchta
- Department of Clinical Chemistry, Medical University of Gdańsk, Dębinki 7, 80-210 Gdańsk, Poland
| | | | - Małgorzata Lenartowicz
- Laboratory of Genetics and Evolutionism, Institute of Zoology and Biomedical Research, Jagiellonian University, Gronostajowa 9, 30-387 Kraków, Poland
| | - Maciej Jankowski
- Department of Clinical Chemistry, Medical University of Gdańsk, Dębinki 7, 80-210 Gdańsk, Poland
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Doi K, Kimura H, Kim SH, Kaneda S, Wada T, Tanaka T, Shimizu A, Sano T, Chikamori M, Shinohara M, Matsunaga YT, Nangaku M, Fujii T. Enhanced podocyte differentiation and changing drug toxicity sensitivity through pressure-controlled mechanical filtration stress on a glomerulus-on-a-chip. LAB ON A CHIP 2023; 23:437-450. [PMID: 36546862 DOI: 10.1039/d2lc00941b] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/17/2023]
Abstract
Podocytes, localized in the glomerulus, are a prognostic factor of proteinuria in kidney disease and are exposed to distinct physiological stimuli from basal to apical filtration flow. Research studies on drug discovery and disease modeling for glomerulopathy have developed a glomerulus-on-a-chip and studied podocyte mechanobiology to realize alternative methods to animal experiments. However, the effect of filtration stimulus on podocytes has remained unclear. Herein, we report the successful development of a user-friendly filtration culture device and system that can precisely control the filtration flow using air pressure control by incorporating a commercially available culture insert. It allows mouse podocytes to be cultured under filtration conditions for three days with a guarantee of maintaining the integrity of the podocyte layer. Using our system, this study demonstrated that podocyte damage caused by hyperfiltration resulting from glomerular hypertension, a common pathophysiology of many glomerulopathies, was successfully recapitulated and that filtration stimulus promotes the maturation of podocytes in terms of their morphology and gene expression. Furthermore, we demonstrated that filtration stimulus induced different drug responsiveness in podocytes than those seen under static conditions, and that the difference in drug responsiveness was dependent on the pharmacological mechanism. Overall, this study has revealed differentiating and pharmacodynamic properties of filtration stimulus and brings new insights into the research field of podocyte mechanobiology towards the realization of glomerulus-on-a-chip.
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Affiliation(s)
- Kotaro Doi
- Institute of Industrial Science, The University of Tokyo, Tokyo, Japan
| | - Hiroshi Kimura
- Micro/Nano Technology Center, Tokai University, Kanagawa, Japan
| | - Soo Hyeon Kim
- Institute of Industrial Science, The University of Tokyo, Tokyo, Japan
| | - Shohei Kaneda
- Department of Mechanical Systems Engineering, Faculty of Engineering, Kogakuin University, Tokyo, Japan
| | - Takehiko Wada
- Division of Nephrology, Endocrinology and Metabolism, Tokai University School of Medicine, Kanagawa, Japan
| | - Tetsuhiro Tanaka
- Department of Nephrology, Rheumatology and Endocrinology, Tohoku University Graduate School of Medicine, Miyagi, Japan
| | - Akira Shimizu
- Department of Analytic Human Pathology, Nippon Medical School, Tokyo, Japan
| | - Takanori Sano
- Institute of Industrial Science, The University of Tokyo, Tokyo, Japan
| | | | - Marie Shinohara
- Institute of Industrial Science, The University of Tokyo, Tokyo, Japan
| | | | - Masaomi Nangaku
- Division of Nephrology and Endocrinology, The University of Tokyo Graduate School of Medicine, Tokyo, Japan
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Staruschenko A, Ma R, Palygin O, Dryer SE. Ion channels and channelopathies in glomeruli. Physiol Rev 2023; 103:787-854. [PMID: 36007181 PMCID: PMC9662803 DOI: 10.1152/physrev.00013.2022] [Citation(s) in RCA: 22] [Impact Index Per Article: 22.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/14/2022] [Revised: 08/15/2022] [Accepted: 08/21/2022] [Indexed: 11/22/2022] Open
Abstract
An essential step in renal function entails the formation of an ultrafiltrate that is delivered to the renal tubules for subsequent processing. This process, known as glomerular filtration, is controlled by intrinsic regulatory systems and by paracrine, neuronal, and endocrine signals that converge onto glomerular cells. In addition, the characteristics of glomerular fluid flow, such as the glomerular filtration rate and the glomerular filtration fraction, play an important role in determining blood flow to the rest of the kidney. Consequently, disease processes that initially affect glomeruli are the most likely to lead to end-stage kidney failure. The cells that comprise the glomerular filter, especially podocytes and mesangial cells, express many different types of ion channels that regulate intrinsic aspects of cell function and cellular responses to the local environment, such as changes in glomerular capillary pressure. Dysregulation of glomerular ion channels, such as changes in TRPC6, can lead to devastating glomerular diseases, and a number of channels, including TRPC6, TRPC5, and various ionotropic receptors, are promising targets for drug development. This review discusses glomerular structure and glomerular disease processes. It also describes the types of plasma membrane ion channels that have been identified in glomerular cells, the physiological and pathophysiological contexts in which they operate, and the pathways by which they are regulated and dysregulated. The contributions of these channels to glomerular disease processes, such as focal segmental glomerulosclerosis (FSGS) and diabetic nephropathy, as well as the development of drugs that target these channels are also discussed.
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Affiliation(s)
- Alexander Staruschenko
- Department of Molecular Pharmacology and Physiology, University of South Florida, Tampa, Florida
- Hypertension and Kidney Research Center, University of South Florida, Tampa, Florida
- James A. Haley Veterans Hospital, Tampa, Florida
| | - Rong Ma
- Department of Physiology and Anatomy, University of North Texas Health Science Center, Fort Worth, Texas
| | - Oleg Palygin
- Division of Nephrology, Department of Medicine, Medical University of South Carolina, Charleston, South Carolina
| | - Stuart E Dryer
- Department of Biology and Biochemistry, University of Houston, Houston, Texas
- Department of Biomedical Sciences, Tilman J. Fertitta Family College of Medicine, University of Houston, Houston, Texas
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Wang J, Feng Y, Zhang Y, Liu J, Gong L, Zhang X, Liao H. TNF-α and IL-1β Promote Renal Podocyte Injury in T2DM Rats by Decreasing Glomerular VEGF/eNOS Expression Levels and Altering Hemodynamic Parameters. J Inflamm Res 2022; 15:6657-6673. [PMID: 36532651 PMCID: PMC9748123 DOI: 10.2147/jir.s391473] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/06/2022] [Accepted: 11/30/2022] [Indexed: 07/01/2024] Open
Abstract
PURPOSE Diabetic nephropathy (DN) is a serious microvascular complication in those with type 2 diabetes mellitus (T2DM). Evidence confirms that serum tumor necrosis factor-α (TNF-α) and interleukin-1β (IL-1β) in the T2DM stage are proposed as prognostic markers for DN development, but it is unclear how they affect renal podocyte-associated nephrin and WT-1 expression. In the presence of podocyte injury, glomerular vascular endothelial growth factor (VEGF), endothelial nitric oxide synthase (eNOS) and hemodynamic parameters are dysregulated. The current research aimed to clarify the relationship of TNF-α and IL-1β with podocyte injury by altering VEGF/eNOS expression and hemodynamic parameters. METHODS A high-fat diet/streptozotocin-induced DN rat model was established. Serum TNF-α and IL-1β levels were tracked in the pre-T2DM, T2DM and DN stages. In the DN stage, the mRNA and protein expression levels of renal TNF-α, IL-1β, VEGF, eNOS, nephrin and WT-1 were studied. Renal hemodynamic parameters, including peak systolic velocity, end-diastolic flow velocity and mean velocity were measured with a color Doppler ultrasound technique. RESULTS Compared to those in the normal control (CTL) group, serum TNF-α and IL-1β levels increased significantly in the pre-T2DM stage (obesity, insulin resistance and hyperlipidemia), T2DM stage (hyperglycemia) and DN stage (abnormal renal functions) (all: P < 0.05) in the DN group. Serum TNF-α and IL-1β levels in the T2DM stage were significantly higher than those in the pre-T2DM stage (two: P < 0.05). Compared to the CTL group, renal nephrin, WT-1, TNF-α, IL-1β, eNOS and VEGF expression and hemodynamic parameters in the DN stage all showed significant differences separately (all: P < 0.05). CONCLUSION Increased serum and renal TNF-α and IL-1β levels played important roles in reducing renal nephrin and WT-1 expression levels, which may be related to the fact that the former affected renal VEGF/eNOS expression and blood flow parameters in the DN rats.
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Affiliation(s)
- Jufang Wang
- Department of Ultrasonic Diagnosis, Fifth Hospital of Shanxi Medical University (Shanxi Provincial People’s Hospital), Taiyuan, People’s Republic of China
| | - Yating Feng
- School of Pharmacy, Shanxi Medical University, Taiyuan, People’s Republic of China
| | - Yan Zhang
- Department of Nephrology, Fifth Hospital of Shanxi Medical University (Shanxi Provincial People’s Hospital), Taiyuan, People’s Republic of China
| | - Jing Liu
- School of Pharmacy, Shanxi Medical University, Taiyuan, People’s Republic of China
| | - Le Gong
- School of Pharmacy, Shanxi Medical University, Taiyuan, People’s Republic of China
| | - Xiaohong Zhang
- Department of Ultrasonic Diagnosis, Fifth Hospital of Shanxi Medical University (Shanxi Provincial People’s Hospital), Taiyuan, People’s Republic of China
| | - Hui Liao
- Department of Pharmacy, Fifth Hospital of Shanxi Medical University (Shanxi Provincial People’s Hospital), Taiyuan, People’s Republic of China
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Guo R, Wang P, Zheng X, Cui W, Shang J, Zhao Z. SGLT2 inhibitors suppress epithelial-mesenchymal transition in podocytes under diabetic conditions via downregulating the IGF1R/PI3K pathway. Front Pharmacol 2022; 13:897167. [PMID: 36225569 PMCID: PMC9550168 DOI: 10.3389/fphar.2022.897167] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/15/2022] [Accepted: 08/23/2022] [Indexed: 01/11/2023] Open
Abstract
Loss of podocyte is a characteristic pathological change of diabetic nephropathy (DN) which is associated with increased proteinuria. Many studies have shown that novel inhibitors of sodium-glucose cotransporter 2 (SGLT2-is), such as dapagliflozin, exert nephroprotective effect on delaying DN progression. However, the mechanisms underlying SGLT2-associated podocyte injury are still not fully elucidated. Here, we generated streptozotocin-induced DN models and treated them with dapagliflozin to explore the possible mechanisms underlying SGLT2 regulation. Compared to mice with DN, dapagliflozin-treated mice exhibited remission of pathological lesions, including glomerular sclerosis, thickening of the glomerular basement membrane (GBM), podocyte injury in the glomeruli, and decreased nephrotoxin levels accompanied by decreased SGLT2 expression. The mRNA expression profiles of these treated mice revealed the significance of the insulin-like growth factor-1 receptor (IGF1R)/PI3K regulatory axis in glomerular injury. KEGG analysis confirmed that the phosphatidylinositol signaling system and insulin signaling pathway were enriched. Western blotting showed that SGLT2-is inhibited the increase of mesenchymal markers (α-SMA, SNAI-1, and ZEB2) and the loss of podocyte markers (nephrin and E-cad). Additionally, SGLT2, IGF1R, phosphorylated PI3K, α-SMA, SNAI-1, and ZEB2 protein levels were increased in high glucose-stimulated human podocytes (HPC) and significantly decreased in dapagliflozin-treated (50 nM and 100 nM) or OSI-906-treated (inhibitor of IGF1R, 60 nM) groups. However, the use of both inhibitors did not enhance this protective effect. Next, we analyzed urine and plasma samples from a cohort consisting of 13 healthy people and 19 DN patients who were administered with (n = 9) or without (n = 10) SGLT2 inhibitors. ELISA results showed decreased circulating levels of IGF1 and IGF2 in SGLT2-is-treated DN patients compared with DN patients. Taken together, our study reported the key role of SGLT2/IGF1R/PI3K signaling in regulating podocyte epithelial-mesenchymal transition (EMT). Modulating IGF1R expression may be a novel approach for DN therapy.
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Affiliation(s)
- Ruixue Guo
- Department of Nephrology, The First Affiliated Hospital of Zhengzhou University, Zhengzhou, China,Zhengzhou University, Zhengzhou, China
| | - Peipei Wang
- Department of Nephrology, The First Affiliated Hospital of Zhengzhou University, Zhengzhou, China,Zhengzhou University, Zhengzhou, China
| | - Xuejun Zheng
- Department of Nephrology, The First Affiliated Hospital of Zhengzhou University, Zhengzhou, China,Zhengzhou University, Zhengzhou, China
| | - Wen Cui
- Department of Nephrology, The First Affiliated Hospital of Zhengzhou University, Zhengzhou, China,Zhengzhou University, Zhengzhou, China
| | - Jin Shang
- Department of Nephrology, The First Affiliated Hospital of Zhengzhou University, Zhengzhou, China,Laboratory of Nephrology, The First Affiliated Hospital of Zhengzhou University, Zhengzhou, China,Laboratory Animal Platform of Academy of Medical Sciences, Zhengzhou University, Zhengzhou, China,*Correspondence: Zhanzheng Zhao, ; Jin Shang,
| | - Zhanzheng Zhao
- Department of Nephrology, The First Affiliated Hospital of Zhengzhou University, Zhengzhou, China,Laboratory of Nephrology, The First Affiliated Hospital of Zhengzhou University, Zhengzhou, China,Laboratory Animal Platform of Academy of Medical Sciences, Zhengzhou University, Zhengzhou, China,*Correspondence: Zhanzheng Zhao, ; Jin Shang,
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