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Lin B, Wan H, Yang J, Yu L, Zhou H, Wan H. Lipid regulation of protocatechualdehyde and hydroxysafflor yellow A via AMPK/SREBP2/PCSK9/LDLR signaling pathway in hyperlipidemic zebrafish. Heliyon 2024; 10:e24908. [PMID: 38333845 PMCID: PMC10850903 DOI: 10.1016/j.heliyon.2024.e24908] [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: 11/10/2023] [Revised: 01/02/2024] [Accepted: 01/17/2024] [Indexed: 02/10/2024] Open
Abstract
The consumption of a high-cholesterol diet is known to cause hyperlipidemia, which is one of the main risk factors for cardiovascular disease. Protocatechualdehyde (PCA) and hydroxysafflor yellow A (HSYA) are the active components of Salvia miltiorrhiza and safflower, respectively. However, their exact mechanism is still unclear. The aim of this study is to investigate its effects on lipid deposition and liver damage in hyperlipidemic zebrafish and its mechanism of anti-hyperlipidemia. The results showed that the use of PCA and HSYA alone and in combination can improve lipid deposition, slow behavior, abnormal blood flow and liver tissue damage, and the combined use is more effective. Further RT-qPCR results showed that PCA + HSYA can regulate the mRNA levels of PPAR-γ, SREBP2, SREBP1, HMGCR, PCSK9, mTOR, C/EBPα, LDLR, AMPK, HNF-1α and FoxO3a. The PCA + HSYA significantly improves lipid deposition and abnormal liver function in hyperlipidemic zebrafish larvae, which may be related to the AMPK/SREBP2/PCSK9/LDLR signaling pathway.
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Affiliation(s)
- Bingying Lin
- School of Basic Medical Sciences, Zhejiang Chinese Medical University, Hangzhou, China
| | - Haofang Wan
- Academy of Chinese Medical Sciences, Zhejiang Chinese Medical University, Hangzhou, China
| | - Jiehong Yang
- School of Basic Medical Sciences, Zhejiang Chinese Medical University, Hangzhou, China
| | - Li Yu
- School of Basic Medical Sciences, Zhejiang Chinese Medical University, Hangzhou, China
- Institute of Cardio-Cerebrovascular Diseases, Zhejiang Chinese Medical University, Hangzhou, China
- Key Laboratory of TCM Encephalopathy of Zhejiang Province (grant no. 2020E10012), Hangzhou, China
| | - Huifen Zhou
- School of Basic Medical Sciences, Zhejiang Chinese Medical University, Hangzhou, China
- Institute of Cardio-Cerebrovascular Diseases, Zhejiang Chinese Medical University, Hangzhou, China
- Key Laboratory of TCM Encephalopathy of Zhejiang Province (grant no. 2020E10012), Hangzhou, China
| | - Haitong Wan
- School of Basic Medical Sciences, Zhejiang Chinese Medical University, Hangzhou, China
- Institute of Cardio-Cerebrovascular Diseases, Zhejiang Chinese Medical University, Hangzhou, China
- First Affiliated Hospital of Zhejiang Chinese Medical University, Hangzhou, China
- Key Laboratory of TCM Encephalopathy of Zhejiang Province (grant no. 2020E10012), Hangzhou, China
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Thomson E, Tran M, Robevska G, Ayers K, van der Bergen J, Gopalakrishnan Bhaskaran P, Haan E, Cereghini S, Vash-Margita A, Margetts M, Hensley A, Nguyen Q, Sinclair A, Koopman P, Pelosi E. Functional genomics analysis identifies loss of HNF1B function as a cause of Mayer-Rokitansky-Küster-Hauser syndrome. Hum Mol Genet 2023; 32:1032-1047. [PMID: 36282544 PMCID: PMC9990990 DOI: 10.1093/hmg/ddac262] [Citation(s) in RCA: 5] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/21/2022] [Revised: 10/04/2022] [Accepted: 10/17/2022] [Indexed: 11/12/2022] Open
Abstract
Mayer-Rokitansky-Küster-Hauser (MRKH) syndrome is a congenital condition characterized by aplasia or hypoplasia of the uterus and vagina in women with a 46,XX karyotype. This condition can occur as type I when isolated or as type II when associated with extragenital anomalies including kidney and skeletal abnormalities. The genetic basis of MRKH syndrome remains unexplained and several candidate genes have been proposed to play a role in its etiology, including HNF1B, LHX1 and WNT4. Here, we conducted a microarray analysis of 13 women affected by MRKH syndrome, resulting in the identification of chromosomal changes, including the deletion at 17q12, which contains both HNF1B and LHX1. We focused on HNF1B for further investigation due to its known association with, but unknown etiological role in, MRKH syndrome. We ablated Hnf1b specifically in the epithelium of the Müllerian ducts in mice and found that this caused hypoplastic development of the uterus, as well as kidney anomalies, closely mirroring the MRKH type II phenotype. Using single-cell RNA sequencing of uterine tissue in the Hnf1b-ablated embryos, we analyzed the molecules and pathways downstream of Hnf1b, revealing a dysregulation of processes associated with cell proliferation, migration and differentiation. Thus, we establish that loss of Hnf1b function leads to an MRKH phenotype and generate the first mouse model of MRKH syndrome type II. Our results support the investigation of HNF1B in clinical genetic settings of MRKH syndrome and shed new light on the molecular mechanisms underlying this poorly understood condition in women's reproductive health.
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Affiliation(s)
- Ella Thomson
- Centre for Clinical Research, The University of Queensland, Brisbane, QLD, Australia
- Institute for Molecular Bioscience, The University of Queensland, Brisbane, QLD, Australia
| | - Minh Tran
- Institute for Molecular Bioscience, The University of Queensland, Brisbane, QLD, Australia
| | - Gorjana Robevska
- Reproductive Development, Murdoch Children's Research Institute, Melbourne, VIC, Australia
| | - Katie Ayers
- Reproductive Development, Murdoch Children's Research Institute, Melbourne, VIC, Australia
- Department of Paediatrics, The University of Melbourne, Melbourne, VIC, Australia
| | - Jocelyn van der Bergen
- Reproductive Development, Murdoch Children's Research Institute, Melbourne, VIC, Australia
| | | | - Eric Haan
- Faculty of Health and Medical Sciences, The University of Adelaide, Adelaide, SA, Australia
| | - Silvia Cereghini
- Institut de Biologie Paris-Seine, Sorbonne Université, Paris, France
| | - Alla Vash-Margita
- Division of Pediatric and Adolescent Gynecology, Department of Obstetrics, Gynecology and Reproductive Sciences, Yale University School of Medicine, New Haven, CT, USA
| | - Miranda Margetts
- Center for American Indian and Rural Health Equity, Montana State University, Bozeman, MT, USA
| | | | - Quan Nguyen
- Institute for Molecular Bioscience, The University of Queensland, Brisbane, QLD, Australia
| | - Andrew Sinclair
- Reproductive Development, Murdoch Children's Research Institute, Melbourne, VIC, Australia
- Department of Paediatrics, The University of Melbourne, Melbourne, VIC, Australia
| | | | - Emanuele Pelosi
- To whom correspondence should be addressed. Tel: +61 7 3346 6073;
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Grand K, Stoltz M, Rizzo L, Röck R, Kaminski MM, Salinas G, Getwan M, Naert T, Pichler R, Lienkamp SS. HNF1B Alters an Evolutionarily Conserved Nephrogenic Program of Target Genes. J Am Soc Nephrol 2023; 34:412-432. [PMID: 36522156 PMCID: PMC10103355 DOI: 10.1681/asn.2022010076] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/18/2022] [Revised: 10/11/2022] [Accepted: 11/09/2022] [Indexed: 12/23/2022] Open
Abstract
SIGNIFICANCE STATEMENT Mutations in hepatocyte nuclear factor-1 β ( HNF1B ) are the most common monogenic causes of congenital renal malformations. HNF1B is necessary to directly reprogram fibroblasts to induced renal tubule epithelial cells (iRECs) and, as we demonstrate, can induce ectopic pronephric tissue in Xenopus ectodermal organoids. Using these two systems, we analyzed the effect of HNF1B mutations found in patients with cystic dysplastic kidney disease. We found cross-species conserved targets of HNF1B, identified transcripts that are differentially regulated by the patient-specific mutant protein, and functionally validated novel HNF1B targets in vivo . These results highlight evolutionarily conserved transcriptional mechanisms and provide insights into the genetic circuitry of nephrogenesis. BACKGROUND Hepatocyte nuclear factor-1 β (HNF1B) is an essential transcription factor during embryogenesis. Mutations in HNF1B are the most common monogenic causes of congenital cystic dysplastic renal malformations. The direct functional consequences of mutations in HNF1B on its transcriptional activity are unknown. METHODS Direct reprogramming of mouse fibroblasts to induced renal tubular epithelial cells was conducted both with wild-type HNF1B and with patient mutations. HNF1B was expressed in Xenopus ectodermal explants. Transcriptomic analysis by bulk RNA-Seq identified conserved targets with differentially regulated expression by the wild-type or R295C mutant. CRISPR/Cas9 genome editing in Xenopus embryos evaluated transcriptional targets in vivo . RESULTS HNF1B is essential for reprogramming mouse fibroblasts to induced renal tubular epithelial cells and induces development of ectopic renal organoids from pluripotent Xenopus cells. The mutation R295C retains reprogramming and inductive capacity but alters the expression of specific sets of downstream target genes instead of diminishing overall transcriptional activity of HNF1B. Surprisingly, targets associated with polycystic kidney disease were less affected than genes affected in congenital renal anomalies. Cross-species-conserved transcriptional targets were dysregulated in hnf1b CRISPR-depleted Xenopus embryos, confirming their dependence on hnf1b . CONCLUSIONS HNF1B activates an evolutionarily conserved program of target genes that disease-causing mutations selectively disrupt. These findings provide insights into the renal transcriptional network that controls nephrogenesis.
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Affiliation(s)
- Kelli Grand
- Institute of Anatomy, University of Zurich, Zurich, Switzerland
| | - Martine Stoltz
- The University Medical Center Freiburg, Faculty of Medicine, University of Freiburg, Freiburg, Germany
| | - Ludovica Rizzo
- Institute of Anatomy, University of Zurich, Zurich, Switzerland
| | - Ruth Röck
- Institute of Anatomy, University of Zurich, Zurich, Switzerland
| | - Michael M. Kaminski
- Berlin Institute for Medical Systems Biology, Max Delbrück Center for Molecular Medicine in the Helmholtz Association, Berlin, Germany
- Department of Nephrology and Medical Intensive Care, Charité Universitätsmedizin Berlin, Berlin, Germany
- Berlin Institute of Health, Berlin, Germany
| | | | - Maike Getwan
- Institute of Anatomy, University of Zurich, Zurich, Switzerland
| | - Thomas Naert
- Institute of Anatomy, University of Zurich, Zurich, Switzerland
| | - Roman Pichler
- The University Medical Center Freiburg, Faculty of Medicine, University of Freiburg, Freiburg, Germany
| | - Soeren S. Lienkamp
- Institute of Anatomy, University of Zurich, Zurich, Switzerland
- The University Medical Center Freiburg, Faculty of Medicine, University of Freiburg, Freiburg, Germany
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Tholen LE, Latta F, Martens JHA, Hoenderop JGJ, de Baaij JHF. Transcription factor HNF1β controls a transcriptional network regulating kidney cell structure and tight junction integrity. Am J Physiol Renal Physiol 2023; 324:F211-F224. [PMID: 36546837 DOI: 10.1152/ajprenal.00199.2022] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022] Open
Abstract
Mutations in the hepatocyte nuclear factor (HNF)1β gene (HNF1B) cause autosomal dominant tubulointerstitial kidney disease, a rare and heterogeneous disease characterized by renal cysts and/or malformation, maturity-onset diabetes of the young, hypomagnesemia, and hypokalemia. The electrolyte disturbances may develop in the distal part of the nephron, which is important for fine-tuning of Mg2+ and Ca2+ reabsorption. Therefore, we aimed to study the transcriptional network directed by HNF1β in the distal part of the nephron. We combined HNF1β chromatin immunoprecipitation-sequencing and mRNA expression data to identify direct targets of HNF1β in a renal distal convoluted tubule cell line (mpkDCT). Gene Ontology term pathway analysis demonstrated enrichment of cell polarity, cell-cell junction, and cytoskeleton pathways in the dataset. Genes directly and indirectly regulated by HNF1β within these pathways included members of the apical and basolateral polarity complexes including Crumbs protein homolog 3 (Crb3), partitioning defective 6 homolog-β (Pard6b), and LLGL Scribble cell polarity complex component 2 (Llgl2). In monolayers of mouse inner medullary collecting duct 3 cells expressing dominant negative Hnf1b, tight junction integrity was compromised, as observed by reduced transepithelial electrical resistance values and increased permeability for fluorescein (0.4 kDa) compared with wild-type cells. Expression of dominant negative Hnf1b also led to a decrease in height (30%) and an increase in surface (58.5%) of cells grown on membranes. Moreover, three-dimensional spheroids formed by cells expressing dominant negative Hnf1b were reduced in size compared with wild-type spheroids (30%). Together, these findings demonstrate that HNF1β directs a transcriptional network regulating tight junction integrity and cell structure in the distal part of the nephron.NEW & NOTEWORTHY Genetic defects in transcription factor hepatocyte nuclear factor (HNF)1β cause a heterogeneous disease characterized by electrolyte disturbances, kidney cysts, and diabetes. By combining RNA-sequencing and HNF1β chromatin immunoprecipitation-sequencing data, we identified new HNF1β targets that were enriched for cell polarity pathways. Newly discovered targets included members of polarity complexes Crb3, Pard6b, and Llgl2. Functional assays in kidney epithelial cells demonstrated decreased tight junction integrity and a loss of typical cuboidal morphology in mutant Hnf1b cells.
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Affiliation(s)
- Lotte E Tholen
- Department of Physiology, Radboud Institute for Molecular Life Sciences, Radboud University Medical Center, Nijmegen, The Netherlands
| | - Femke Latta
- Department of Physiology, Radboud Institute for Molecular Life Sciences, Radboud University Medical Center, Nijmegen, The Netherlands
| | - Joost H A Martens
- Department of Molecular Biology, Faculty of Science, Radboud Institute for Molecular Life Sciences, Radboud University Nijmegen, Nijmegen, The Netherlands
| | - Joost G J Hoenderop
- Department of Physiology, Radboud Institute for Molecular Life Sciences, Radboud University Medical Center, Nijmegen, The Netherlands
| | - Jeroen H F de Baaij
- Department of Physiology, Radboud Institute for Molecular Life Sciences, Radboud University Medical Center, Nijmegen, The Netherlands
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Bishop AC, Spradling‐Reeves KD, Shade RE, Lange KJ, Birnbaum S, Favela K, Dick EJ, Nijland MJ, Li C, Nathanielsz PW, Cox LA. Postnatal persistence of nonhuman primate sex-dependent renal structural and molecular changes programmed by intrauterine growth restriction. J Med Primatol 2022; 51:329-344. [PMID: 35855511 PMCID: PMC9796938 DOI: 10.1111/jmp.12601] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/18/2021] [Revised: 06/09/2022] [Accepted: 06/17/2022] [Indexed: 01/07/2023]
Abstract
BACKGROUND Poor nutrition during fetal development programs postnatal kidney function. Understanding postnatal consequences in nonhuman primates (NHP) is important for translation to our understanding the impact on human kidney function and disease risk. We hypothesized that intrauterine growth restriction (IUGR) in NHP persists postnatally, with potential molecular mechanisms revealed by Western-type diet challenge. METHODS IUGR juvenile baboons were fed a 7-week Western diet, with kidney biopsies, blood, and urine collected before and after challenge. Transcriptomics and metabolomics were used to analyze biosamples. RESULTS Pre-challenge IUGR kidney transcriptome and urine metabolome differed from controls. Post-challenge, sex and diet-specific responses in urine metabolite and renal signaling pathways were observed. Dysregulated mTOR signaling persisted postnatally in female pre-challenge. Post-challenge IUGR male response showed uncoordinated signaling suggesting proximal tubule injury. CONCLUSION Fetal undernutrition impacts juvenile offspring kidneys at the molecular level suggesting early-onset blood pressure dysregulation.
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Affiliation(s)
- Andrew C. Bishop
- Center for Precision MedicineDepartment of Internal Medicine, Wake Forest School of MedicineWinston‐SalemNorth CarolinaUSA
| | - Kimberly D. Spradling‐Reeves
- Center for Precision MedicineDepartment of Internal Medicine, Wake Forest School of MedicineWinston‐SalemNorth CarolinaUSA
| | - Robert E. Shade
- Southwest National Primate Research CenterTexas Biomedical Research InstituteSan AntonioTexasUSA
| | - Kenneth J. Lange
- Department of Pharmaceuticals and BioengineeringSouthwest Research InstituteSan AntonioTexasUSA
| | - Shifra Birnbaum
- Southwest National Primate Research CenterTexas Biomedical Research InstituteSan AntonioTexasUSA
| | - Kristin Favela
- Department of Pharmaceuticals and BioengineeringSouthwest Research InstituteSan AntonioTexasUSA
| | - Edward J. Dick
- Southwest National Primate Research CenterTexas Biomedical Research InstituteSan AntonioTexasUSA
| | - Mark J. Nijland
- Department of Obstetrics and GynecologyUniversity of Texas Health Science CenterSan AntonioTexasUSA
| | - Cun Li
- Department of Animal SciencesUniversity of WyomingLaramieWyomingUSA
| | - Peter W. Nathanielsz
- Southwest National Primate Research CenterTexas Biomedical Research InstituteSan AntonioTexasUSA
- Department of Animal SciencesUniversity of WyomingLaramieWyomingUSA
| | - Laura A. Cox
- Center for Precision MedicineDepartment of Internal Medicine, Wake Forest School of MedicineWinston‐SalemNorth CarolinaUSA
- Southwest National Primate Research CenterTexas Biomedical Research InstituteSan AntonioTexasUSA
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6
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Shao A, Gearhart MD, Chan SC, Miao Z, Susztak K, Igarashi P. Multiomics analysis reveals that hepatocyte nuclear factor 1β regulates axon guidance genes in the developing mouse kidney. Sci Rep 2022; 12:17586. [PMID: 36266461 PMCID: PMC9585060 DOI: 10.1038/s41598-022-22327-5] [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: 07/22/2022] [Accepted: 10/12/2022] [Indexed: 01/13/2023] Open
Abstract
The transcription factor hepatocyte nuclear factor 1β (HNF-1β) is essential for normal development of the kidney and other epithelial organs. In the developing mouse kidney, HNF-1β is required for the differentiation and patterning of immature nephrons and branching morphogenesis of the ureteric bud (UB). Here, we used ChIP-sequencing (ChIP-seq) and RNA sequencing (RNA-seq) to identify genes that are regulated by HNF-1β in embryonic mouse kidneys. ChIP-seq revealed that HNF-1β binds to 8284 sites in chromatin from E14.5 mouse kidneys. Comparison with previous ATAC-seq and histone modification studies showed that HNF-1β binding peaks colocalized with open chromatin and epigenetic marks of transcriptional activation (H3K27 acetylation, H3K4 trimethylation, H3K4 monomethylation), indicating that the binding sites were functional. To investigate the relationship between HNF-1β binding and HNF-1β-dependent gene regulation, RNA-seq was performed on UB cells purified from wild-type and HNF-1β mutant embryonic kidneys. A total of 1632 genes showed reduced expression in HNF-1β-deficient UB cells, and 485 genes contained nearby HNF-1β binding sites indicating that they were directly activated by HNF-1β. Conversely, HNF-1β directly repressed the expression of 526 genes in the UB. Comparison with snATAC-seq analysis of UB-derived cells showed that both HNF-1β-dependent activation and repression correlated with chromatin accessibility. Pathway analysis revealed that HNF-1β binds near 68 axon guidance genes in the developing kidney. RNA-seq analysis showed that Nrp1, Sema3c, Sema3d, Sema6a, and Slit2 were activated by HNF-1β, whereas Efna1, Epha3, Epha4, Epha7, Ntn4, Plxna2, Sema3a, Sema4b, Slit3, Srgap1, Unc5c and Unc5d were repressed by HNF-1β. RNAscope in situ hybridization showed that Nrp1, Sema3c, Sema3d, Sema6a, and Slit2 were expressed in wild-type UB and were dysregulated in HNF-1β mutant UB. These studies show that HNF-1β directly regulates the expression of multiple axon guidance genes in the developing mouse kidney. Dysregulation of axon guidance genes may underlie kidney defects in HNF-1β mutant mice.
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Affiliation(s)
- Annie Shao
- grid.17635.360000000419368657Department of Medicine, University of Minnesota Medical School, 420 Delaware Street SE, MMC 194, Minneapolis, MN 55455 USA ,grid.17635.360000000419368657Molecular, Cellular, Developmental Biology and Genetics Graduate Program, University of Minnesota, Minneapolis, MN USA
| | - Micah D. Gearhart
- grid.17635.360000000419368657Department of Genetics, Cell Biology and Development, University of Minnesota, Minneapolis, MN USA
| | - Siu Chiu Chan
- grid.17635.360000000419368657Department of Medicine, University of Minnesota Medical School, 420 Delaware Street SE, MMC 194, Minneapolis, MN 55455 USA
| | - Zhen Miao
- grid.25879.310000 0004 1936 8972Renal, Electrolyte, and Hypertension Division, Department of Medicine, University of Pennsylvania, Perelman School of Medicine, Philadelphia, PA USA
| | - Katalin Susztak
- grid.25879.310000 0004 1936 8972Renal, Electrolyte, and Hypertension Division, Department of Medicine, University of Pennsylvania, Perelman School of Medicine, Philadelphia, PA USA
| | - Peter Igarashi
- grid.17635.360000000419368657Department of Medicine, University of Minnesota Medical School, 420 Delaware Street SE, MMC 194, Minneapolis, MN 55455 USA ,grid.17635.360000000419368657Molecular, Cellular, Developmental Biology and Genetics Graduate Program, University of Minnesota, Minneapolis, MN USA
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7
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Mechanisms of ion transport regulation by HNF1β in the kidney: beyond transcriptional regulation of channels and transporters. Pflugers Arch 2022; 474:901-916. [PMID: 35554666 PMCID: PMC9338905 DOI: 10.1007/s00424-022-02697-5] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/25/2022] [Revised: 04/19/2022] [Accepted: 04/22/2022] [Indexed: 01/01/2023]
Abstract
Hepatocyte nuclear factor 1β (HNF1β) is a transcription factor essential for the development and function of the kidney. Mutations in and deletions of HNF1β cause autosomal dominant tubule interstitial kidney disease (ADTKD) subtype HNF1β, which is characterized by renal cysts, diabetes, genital tract malformations, and neurodevelopmental disorders. Electrolyte disturbances including hypomagnesemia, hyperuricemia, and hypocalciuria are common in patients with ADTKD-HNF1β. Traditionally, these electrolyte disturbances have been attributed to HNF1β-mediated transcriptional regulation of gene networks involved in ion transport in the distal part of the nephron including FXYD2, CASR, KCNJ16, and FXR. In this review, we propose additional mechanisms that may contribute to the electrolyte disturbances observed in ADTKD-HNF1β patients. Firstly, kidney development is severely affected in Hnf1b-deficient mice. HNF1β is required for nephron segmentation, and the absence of the transcription factor results in rudimentary nephrons lacking mature proximal tubule, loop of Henle, and distal convoluted tubule cluster. In addition, HNF1β is proposed to be important for apical-basolateral polarity and tight junction integrity in the kidney. Interestingly, cilia formation is unaffected by Hnf1b defects in several models, despite the HNF1β-mediated transcriptional regulation of many ciliary genes. To what extent impaired nephron segmentation, apical-basolateral polarity, and cilia function contribute to electrolyte disturbances in HNF1β patients remains elusive. Systematic phenotyping of Hnf1b mouse models and the development of patient-specific kidney organoid models will be essential to advance future HNF1β research.
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Hilliard S, Tortelote G, Liu H, Chen CH, El-Dahr S. Single-Cell Chromatin and Gene-Regulatory Dynamics of Mouse Nephron Progenitors. J Am Soc Nephrol 2022; 33:1308-1322. [PMID: 35383123 PMCID: PMC9257825 DOI: 10.1681/asn.2021091213] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/13/2021] [Accepted: 03/22/2022] [Indexed: 11/03/2022] Open
Abstract
BACKGROUND We reasoned that unraveling the dynamic changes in accessibility of genomic regulatory elements and gene expression at single-cell resolution will inform the basic mechanisms of nephrogenesis. METHODS We performed single-cell ATAC-seq and RNA-seq both individually (Singleomes; Six2GFPcells) and jointly in the same cells (Multiomes; kidneys) to generate integrated chromatin and transcriptional maps in mouse embryonic and neonatal nephron progenitor cells (NPCs). RESULTS WWe demonstrate that singleomes and multiomes are comparable in assigning most cell states, identification of new cell type markers, and defining the transcription factors driving cell identity. However, multiomes are more precise in defining the progenitor population. Multiomes identified a "pioneer" bHLH/Fox motif signature in NPCs. Moreover, we identified a subset of Fox factors exhibiting high chromatin activity in podocytes. One of these Fox factors, Foxp1, is important for nephrogenesis. Key nephrogenic factors are distinguished by strong correlation between linked generegulatory elements and gene expression. CONCLUSION Mapping the regulatory landscape at single-cell resolution informs the regulatory hierarchy of nephrogenesis. Paired single-cell epigenomes and transcriptomes of nephron progenitors should provide a foundation to understand prenatal programming, regeneration following injury, and ex vivo nephrogenesis.
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Affiliation(s)
- Sylvia Hilliard
- S Hilliard, Section of Pediatric Nephrology, Department of Pediatrics, Tulane University School of Medicine, New Orleans, United States
| | - Giovane Tortelote
- G Tortelote, Section of Pediatric Nephrology, Department of Pediatrics, Tulane University School of Medicine, New Orleans, United States
| | - Hongbing Liu
- H Liu, Section of Pediatric Nephrology, Department of Pediatrics, Tulane University School of Medicine, New Orleasn, United States
| | - Chao-Hui Chen
- C Chen, Section of Pediatric Nephrology, Department of Pediatrics, Tulane University School of Medicine, New Orleans, United States
| | - Samir El-Dahr
- S El-Dahr, Section of Pediatric Nephrology, Department of Pediatrics, Tulane University School of Medicine, New Orleans, United States
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9
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Małachowska B, Janikiewicz J, Pietrowska K, Wyka K, Madzio J, Wypyszczak K, Tkaczyk M, Chrul S, Zwiech R, Hogendorf A, Małecki MT, Borowiec M, Krętowski A, Młynarski W, Dobrzyń A, Ciborowski M, Fendler W. Elevated level of lysophosphatidic acid among patients with HNF1B mutations and its role in RCAD syndrome: a multiomic study. Metabolomics 2022; 18:15. [PMID: 35179657 PMCID: PMC8857088 DOI: 10.1007/s11306-022-01873-z] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/28/2021] [Accepted: 02/01/2022] [Indexed: 12/22/2022]
Abstract
INTRODUCTION Patients with hepatocyte nuclear factor-1 beta (HNF1B) mutations present a variable phenotype with two main symptoms: maturity onset diabetes of the young (MODY) and polycystic kidney disease (PKD). OBJECTIVES Identification of serum metabolites specific for HNF1Bmut and evaluation of their role in disease pathogenesis. METHODS We recruited patients with HNF1Bmut (N = 10), HNF1Amut (N = 10), PKD: non-dialyzed and dialyzed (N = 8 and N = 13); and healthy controls (N = 12). Serum fingerprinting was performed by LC-QTOF-MS. Selected metabolite was validated by ELISA (enzyme-linked immunosorbent assay) measurements and then biologically connected with HNF1B by in silico analysis. HepG2 were stimulated with lysophosphatidic acid (LPA) and HNF1B gene was knocked down (kd) by small interfering RNA. Transcriptomic analysis with microarrays and western blot measurements were performed. RESULTS Serum levels of six metabolites including: arachidonic acid, hydroxyeicosatetraenoic acid, linoleamide and three LPA (18:1, 18:2 and 20:4), had AUC (the area under the curve) > 0.9 (HNF1Bmut vs comparative groups). The increased level of LPA was confirmed by ELISA measurements. In HepG2HNF1Bkd cells LPA stimulation lead to downregulation of many pathways associated with cell cycle, lipid metabolism, and upregulation of steroid hormone metabolism and Wnt signaling. Also, increased intracellular protein level of autotaxin was detected in the cells. GSK-3alpha/beta protein level and its phosphorylated ratio were differentially affected by LPA stimulation in HNF1Bkd and control cells. CONCLUSIONS LPA is elevated in sera of patients with HNF1Bmut. LPA contributes to the pathogenesis of HNF1B-MODY by affecting Wnt/GSK-3 signaling.
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Affiliation(s)
- Beata Małachowska
- Department of Biostatistics and Translational Medicine, Medical University of Lodz, 15 Mazowiecka Street, 92-215, Lodz, Poland
| | - Justyna Janikiewicz
- Laboratory of Cell Signaling and Metabolic Disorders, Nencki Institute of Experimental Biology PAS, 3 Pasteur Street, 02-093, Warsaw, Poland
| | - Karolina Pietrowska
- Clinical Research Centre, Medical University of Bialystok, 24a Sklodowska-Curie Street, 15-276, Bialystok, Poland
| | - Krystyna Wyka
- Department of Pediatrics, Oncology and Hematology, Medical University of Lodz, 36/50 Sporna Street, 91-738, Lodz, Poland
| | - Joanna Madzio
- Department of Pediatrics, Oncology and Hematology, Medical University of Lodz, 36/50 Sporna Street, 91-738, Lodz, Poland
| | - Kamila Wypyszczak
- Department of Pediatrics, Oncology and Hematology, Medical University of Lodz, 36/50 Sporna Street, 91-738, Lodz, Poland
| | - Marcin Tkaczyk
- Department of Pediatrics, Immunology and Nephrology, Polish Mother's Memorial Hospital Research Institute, 281/289 Rzgowska Street, 93-338, Lodz, Poland
- Department of Pediatrics Nephrology and Immunology, Medical University of Lodz, 281/289 Rzgowska Street, 93-338, Lodz, Poland
| | - Sławomir Chrul
- Department of Pediatrics, Immunology and Nephrology, Polish Mother's Memorial Hospital Research Institute, 281/289 Rzgowska Street, 93-338, Lodz, Poland
| | - Rafał Zwiech
- Department of Kidney Transplantation/Dialysis Department, Barlicki Memorial Teaching Hospital No. 1, Medical University of Lodz, 22 Kopcinskiego Street, 90-153, Lodz, Poland
| | - Anna Hogendorf
- Department of Pediatrics, Diabetology, Endocrinology, and Nephrology, Medical University of Lodz, 36/50 Sporna Street, 91-738, Lodz, Poland
| | - Maciej T Małecki
- Department of Metabolic Diseases, Medical College, Jagiellonian University, 2 Jakubowskiego Street, 30-688, Cracov, Poland
| | - Maciej Borowiec
- Department of Clinical Genetics, Medical University of Lodz, 251 Pomorska Street, 92-213, Lodz, Poland
| | - Adam Krętowski
- Clinical Research Centre, Medical University of Bialystok, 24a Sklodowska-Curie Street, 15-276, Bialystok, Poland
- Department of Endocrinology, Diabetology, and Internal Medicine, Medical University of Bialystok, 24a Sklodowska-Curie Street, 15-276, Bialystok, Poland
| | - Wojciech Młynarski
- Department of Pediatrics, Oncology and Hematology, Medical University of Lodz, 36/50 Sporna Street, 91-738, Lodz, Poland
| | - Agnieszka Dobrzyń
- Laboratory of Cell Signaling and Metabolic Disorders, Nencki Institute of Experimental Biology PAS, 3 Pasteur Street, 02-093, Warsaw, Poland
| | - Michał Ciborowski
- Clinical Research Centre, Medical University of Bialystok, 24a Sklodowska-Curie Street, 15-276, Bialystok, Poland
| | - Wojciech Fendler
- Department of Biostatistics and Translational Medicine, Medical University of Lodz, 15 Mazowiecka Street, 92-215, Lodz, Poland.
- Department of Radiation Oncology, Dana-Farber Cancer Institute, 450 Brookline Avenue, Boston, MA, 02215, USA.
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10
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Piedrafita A, Balayssac S, Casemayou A, Saulnier-Blache JS, Lucas A, Iacovoni JS, Breuil B, Chauveau D, Decramer S, Malet-Martino M, Schanstra JP, Faguer S. Hepatocyte nuclear factor-1β shapes the energetic homeostasis of kidney tubule cells. FASEB J 2021; 35:e21931. [PMID: 34653285 DOI: 10.1096/fj.202100782rr] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/16/2021] [Revised: 08/28/2021] [Accepted: 09/02/2021] [Indexed: 12/17/2022]
Abstract
Energetic metabolism controls key steps of kidney development, homeostasis, and epithelial repair following acute kidney injury (AKI). Hepatocyte nuclear factor-1β (HNF-1β) is a master transcription factor that controls mitochondrial function in proximal tubule (PT) cells. Patients with HNF1B pathogenic variant display a wide range of kidney developmental abnormalities and progressive kidney fibrosis. Characterizing the metabolic changes in PT cells with HNF-1β deficiency may help to identify new targetable molecular hubs involved in HNF1B-related kidney phenotypes and AKI. Here, we combined 1 H-NMR-based metabolomic analysis in a murine PT cell line with CrispR/Cas9-induced Hnf1b invalidation (Hnf1b-/- ), clustering analysis, targeted metabolic assays, and datamining of published RNA-seq and ChIP-seq dataset to identify the role of HNF-1β in metabolism. Hnf1b-/- cells grown in normoxic conditions display intracellular ATP depletion, increased cytosolic lactate concentration, increased lipid droplet content, failure to use pyruvate for energetic purposes, increased levels of tricarboxylic acid (TCA) cycle intermediates and oxidized glutathione, and a reduction of TCA cycle byproducts, all features consistent with mitochondrial dysfunction and an irreversible switch toward glycolysis. Unsupervised clustering analysis showed that Hnf1b-/- cells mimic a hypoxic signature and that they cannot furthermore increase glycolysis-dependent energetic supply during hypoxic challenge. Metabolome analysis also showed alteration of phospholipid biosynthesis in Hnf1b-/- cells leading to the identification of Chka, the gene coding for choline kinase α, as a new putative target of HNF-1β. HNF-1β shapes the energetic metabolism of PT cells and HNF1B deficiency in patients could lead to a hypoxia-like metabolic state precluding further adaptation to ATP depletion following AKI.
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Affiliation(s)
- Alexis Piedrafita
- Institut National de la Santé et de la Recherche Médicale, UMR 1297, Institut des Maladies Métaboliques et Cardiovasculaires, Hôpital Rangueil, Toulouse, France.,Université Paul Sabatier - Toulouse 3, Toulouse, France.,Département de Néphrologie et Transplantation d'Organes, Centre de Référence des Maladies Rénales Rares, Centre Hospitalier Universitaire de Toulouse, Toulouse, France
| | - Stéphane Balayssac
- Groupe de RMN Biomédicale, Laboratoire SPCMIB, UMR CNRS 5068, Université Paul Sabatier, Centre National de la Recherche Scientifique, Toulouse, France.,Laboratoire des Interaction Moléculaires et Réactivité Chimique et Photochimique (IMRCP), UMR 5623, Toulouse, France
| | - Audrey Casemayou
- Institut National de la Santé et de la Recherche Médicale, UMR 1297, Institut des Maladies Métaboliques et Cardiovasculaires, Hôpital Rangueil, Toulouse, France.,Université Paul Sabatier - Toulouse 3, Toulouse, France.,Département de Néphrologie et Transplantation d'Organes, Centre de Référence des Maladies Rénales Rares, Centre Hospitalier Universitaire de Toulouse, Toulouse, France
| | - Jean-Sébastien Saulnier-Blache
- Institut National de la Santé et de la Recherche Médicale, UMR 1297, Institut des Maladies Métaboliques et Cardiovasculaires, Hôpital Rangueil, Toulouse, France.,Université Paul Sabatier - Toulouse 3, Toulouse, France
| | - Alexandre Lucas
- Institut National de la Santé et de la Recherche Médicale, UMR 1297, Institut des Maladies Métaboliques et Cardiovasculaires, Hôpital Rangueil, Toulouse, France
| | - Jason S Iacovoni
- Institut National de la Santé et de la Recherche Médicale, UMR 1297, Institut des Maladies Métaboliques et Cardiovasculaires, Hôpital Rangueil, Toulouse, France
| | - Benjamin Breuil
- Institut National de la Santé et de la Recherche Médicale, UMR 1297, Institut des Maladies Métaboliques et Cardiovasculaires, Hôpital Rangueil, Toulouse, France
| | - Dominique Chauveau
- Institut National de la Santé et de la Recherche Médicale, UMR 1297, Institut des Maladies Métaboliques et Cardiovasculaires, Hôpital Rangueil, Toulouse, France.,Université Paul Sabatier - Toulouse 3, Toulouse, France.,Département de Néphrologie et Transplantation d'Organes, Centre de Référence des Maladies Rénales Rares, Centre Hospitalier Universitaire de Toulouse, Toulouse, France
| | - Stéphane Decramer
- Institut National de la Santé et de la Recherche Médicale, UMR 1297, Institut des Maladies Métaboliques et Cardiovasculaires, Hôpital Rangueil, Toulouse, France.,Université Paul Sabatier - Toulouse 3, Toulouse, France.,Service de Néphrologie, Médecine interne et Hypertension artérielle, Hôpital des Enfants, Centre de Référence des Maladies Rénales Rares, Centre Hospitalier Universitaire de Toulouse, Toulouse, France
| | - Myriam Malet-Martino
- Groupe de RMN Biomédicale, Laboratoire SPCMIB, UMR CNRS 5068, Université Paul Sabatier, Centre National de la Recherche Scientifique, Toulouse, France
| | - Joost P Schanstra
- Institut National de la Santé et de la Recherche Médicale, UMR 1297, Institut des Maladies Métaboliques et Cardiovasculaires, Hôpital Rangueil, Toulouse, France.,Université Paul Sabatier - Toulouse 3, Toulouse, France
| | - Stanislas Faguer
- Institut National de la Santé et de la Recherche Médicale, UMR 1297, Institut des Maladies Métaboliques et Cardiovasculaires, Hôpital Rangueil, Toulouse, France.,Université Paul Sabatier - Toulouse 3, Toulouse, France.,Département de Néphrologie et Transplantation d'Organes, Centre de Référence des Maladies Rénales Rares, Centre Hospitalier Universitaire de Toulouse, Toulouse, France
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11
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Christians A, Weiss AC, Martens H, Klopf MG, Hennies I, Haffner D, Kispert A, Weber RG. Inflammation-like changes in the urothelium of Lifr-deficient mice and LIFR-haploinsufficient humans with urinary tract anomalies. Hum Mol Genet 2021; 29:1192-1204. [PMID: 32179912 DOI: 10.1093/hmg/ddaa048] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/28/2020] [Revised: 03/10/2020] [Accepted: 03/11/2020] [Indexed: 01/16/2023] Open
Abstract
Congenital anomalies of the kidney and urinary tract (CAKUT) are the most common cause of end-stage kidney disease in children. While the genetic aberrations underlying CAKUT pathogenesis are increasingly being elucidated, their consequences on a cellular and molecular level commonly remain unclear. Recently, we reported rare heterozygous deleterious LIFR variants in 3.3% of CAKUT patients, including a novel de novo frameshift variant, identified by whole-exome sequencing, in a patient with severe bilateral CAKUT. We also demonstrated CAKUT phenotypes in Lifr-/- and Lifr+/- mice, including a narrowed ureteric lumen due to muscular hypertrophy and a thickened urothelium. Here, we show that both in the ureter and bladder of Lifr-/- and Lifr+/- embryos, differentiation of the three urothelial cell types (basal, intermediate and superficial cells) occurs normally but that the turnover of superficial cells is elevated due to increased proliferation, enhanced differentiation from their progenitor cells (intermediate cells) and, importantly, shedding into the ureteric lumen. Microarray-based analysis of genome-wide transcriptional changes in Lifr-/- versus Lifr+/+ ureters identified gene networks associated with an antimicrobial inflammatory response. Finally, in a reverse phenotyping effort, significantly more superficial cells were detected in the urine of CAKUT patients with versus without LIFR variants indicating conserved LIFR-dependent urinary tract changes in the murine and human context. Our data suggest that LIFR signaling is required in the epithelium of the urinary tract to suppress an antimicrobial response under homeostatic conditions and that genetically induced inflammation-like changes underlie CAKUT pathogenesis in Lifr deficiency and LIFR haploinsufficiency.
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Affiliation(s)
- Anne Christians
- Department of Human Genetics, Hannover Medical School, Carl-Neuberg-Str. 1, 30625 Hannover, Germany
| | - Anna-Carina Weiss
- Institute of Molecular Biology, Hannover Medical School, Carl-Neuberg-Str. 1, 30625 Hannover, Germany
| | - Helge Martens
- Department of Human Genetics, Hannover Medical School, Carl-Neuberg-Str. 1, 30625 Hannover, Germany
| | - Maximilian Georg Klopf
- Institute of Molecular Biology, Hannover Medical School, Carl-Neuberg-Str. 1, 30625 Hannover, Germany
| | - Imke Hennies
- Department of Pediatric Kidney, Liver and Metabolic Diseases, Hannover Medical School, Carl-Neuberg-Str. 1, 30625 Hannover, Germany
| | - Dieter Haffner
- Department of Pediatric Kidney, Liver and Metabolic Diseases, Hannover Medical School, Carl-Neuberg-Str. 1, 30625 Hannover, Germany
| | - Andreas Kispert
- Institute of Molecular Biology, Hannover Medical School, Carl-Neuberg-Str. 1, 30625 Hannover, Germany
| | - Ruthild G Weber
- Department of Human Genetics, Hannover Medical School, Carl-Neuberg-Str. 1, 30625 Hannover, Germany
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12
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Chan SC, Hajarnis SS, Vrba SM, Patel V, Igarashi P. Hepatocyte nuclear factor 1β suppresses canonical Wnt signaling through transcriptional repression of lymphoid enhancer-binding factor 1. J Biol Chem 2020; 295:17560-17572. [PMID: 33453998 DOI: 10.1074/jbc.ra120.015592] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/11/2020] [Revised: 09/30/2020] [Indexed: 11/06/2022] Open
Abstract
Hepatocyte nuclear factor-1β (HNF-1β) is a tissue-specific transcription factor that is required for normal kidney development and renal epithelial differentiation. Mutations of HNF-1β produce congenital kidney abnormalities and inherited renal tubulopathies. Here, we show that ablation of HNF-1β in mIMCD3 renal epithelial cells results in activation of β-catenin and increased expression of lymphoid enhancer-binding factor 1 (LEF1), a downstream effector in the canonical Wnt signaling pathway. Increased expression and nuclear localization of LEF1 are also observed in cystic kidneys from Hnf1b mutant mice. Expression of dominant-negative mutant HNF-1β in mIMCD3 cells produces hyperresponsiveness to exogenous Wnt ligands, which is inhibited by siRNA-mediated knockdown of Lef1. WT HNF-1β binds to two evolutionarily conserved sites located 94 and 30 kb from the mouse Lef1 promoter. Ablation of HNF-1β decreases H3K27 trimethylation repressive marks and increases β-catenin occupancy at a site 4 kb upstream to Lef1. Mechanistically, WT HNF-1β recruits the polycomb-repressive complex 2 that catalyzes H3K27 trimethylation. Deletion of the β-catenin-binding domain of LEF1 in HNF-1β-deficient cells abolishes the increase in Lef1 transcription and decreases the expression of downstream Wnt target genes. The canonical Wnt target gene, Axin2, is also a direct transcriptional target of HNF-1β through binding to negative regulatory elements in the gene promoter. These findings demonstrate that HNF-1β regulates canonical Wnt target genes through long-range effects on histone methylation at Wnt enhancers and reveal a new mode of active transcriptional repression by HNF-1β.
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Affiliation(s)
- Siu Chiu Chan
- Department of Medicine, University of Minnesota Medical School, Minneapolis, Minnesota, USA
| | - Sachin S Hajarnis
- Department of Internal Medicine, University of Texas Southwestern Medical Center, Dallas, Texas, USA
| | - Sophia M Vrba
- Department of Medicine, University of Minnesota Medical School, Minneapolis, Minnesota, USA
| | - Vishal Patel
- Department of Internal Medicine, University of Texas Southwestern Medical Center, Dallas, Texas, USA
| | - Peter Igarashi
- Department of Medicine, University of Minnesota Medical School, Minneapolis, Minnesota, USA; Department of Internal Medicine, University of Texas Southwestern Medical Center, Dallas, Texas, USA.
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13
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Shao A, Chan SC, Igarashi P. Role of transcription factor hepatocyte nuclear factor-1β in polycystic kidney disease. Cell Signal 2020; 71:109568. [PMID: 32068086 DOI: 10.1016/j.cellsig.2020.109568] [Citation(s) in RCA: 16] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/04/2019] [Revised: 02/09/2020] [Accepted: 02/12/2020] [Indexed: 02/07/2023]
Abstract
Hepatocyte nuclear factor-1β (HNF-1β) is a DNA-binding transcription factor that is essential for normal kidney development. Mutations of HNF1B in humans produce cystic kidney diseases, including renal cysts and diabetes, multicystic dysplastic kidneys, glomerulocystic kidney disease, and autosomal dominant tubulointerstitial kidney disease. Expression of HNF1B is reduced in cystic kidneys from humans with ADPKD, and HNF1B has been identified as a modifier gene in PKD. Genome-wide analysis of chromatin binding has revealed that HNF-1β directly regulates the expression of known PKD genes, such as PKHD1 and PKD2, as well as genes involved in PKD pathogenesis, including cAMP-dependent signaling, renal fibrosis, and Wnt signaling. In addition, a role of HNF-1β in regulating the expression of noncoding RNAs (microRNAs and long noncoding RNAs) has been identified. These findings indicate that HNF-1β regulates a transcriptional and post-transcriptional network that plays a central role in renal cystogenesis.
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Affiliation(s)
- Annie Shao
- Department of Medicine, University of Minnesota Medical School, Minneapolis, MN, USA
| | - Siu Chiu Chan
- Department of Medicine, University of Minnesota Medical School, Minneapolis, MN, USA
| | - Peter Igarashi
- Department of Medicine, University of Minnesota Medical School, Minneapolis, MN, USA.
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14
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Hepatocyte nuclear factor-1β regulates Wnt signaling through genome-wide competition with β-catenin/lymphoid enhancer binding factor. Proc Natl Acad Sci U S A 2019; 116:24133-24142. [PMID: 31712448 DOI: 10.1073/pnas.1909452116] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022] Open
Abstract
Hepatocyte nuclear factor-1β (HNF-1β) is a tissue-specific transcription factor that is essential for normal kidney development and renal tubular function. Mutations of HNF-1β produce cystic kidney disease, a phenotype associated with deregulation of canonical (β-catenin-dependent) Wnt signaling. Here, we show that ablation of HNF-1β in mIMCD3 renal epithelial cells produces hyperresponsiveness to Wnt ligands and increases expression of Wnt target genes, including Axin2, Ccdc80, and Rnf43 Levels of β-catenin and expression of Wnt target genes are also increased in HNF-1β mutant mouse kidneys. Genome-wide chromatin immunoprecipitation sequencing (ChIP-seq) in wild-type and mutant cells showed that ablation of HNF-1β increases by 6-fold the number of sites on chromatin that are occupied by β-catenin. Remarkably, 50% of the sites that are occupied by β-catenin in HNF-1β mutant cells colocalize with HNF-1β-occupied sites in wild-type cells, indicating widespread reciprocal binding. We found that the Wnt target genes Ccdc80 and Rnf43 contain a composite DNA element comprising a β-catenin/lymphoid enhancer binding factor (LEF) site overlapping with an HNF-1β half-site. HNF-1β and β-catenin/LEF compete for binding to this element, and thereby HNF-1β inhibits β-catenin-dependent transcription. Collectively, these studies reveal a mechanism whereby a transcription factor constrains canonical Wnt signaling through direct inhibition of β-catenin/LEF chromatin binding.
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15
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Ferrè S, Igarashi P. New insights into the role of HNF-1β in kidney (patho)physiology. Pediatr Nephrol 2019; 34:1325-1335. [PMID: 29961928 PMCID: PMC6312759 DOI: 10.1007/s00467-018-3990-7] [Citation(s) in RCA: 49] [Impact Index Per Article: 9.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/30/2018] [Revised: 05/24/2018] [Accepted: 05/25/2018] [Indexed: 12/14/2022]
Abstract
Hepatocyte nuclear factor-1β (HNF-1β) is an essential transcription factor that regulates the development and function of epithelia in the kidney, liver, pancreas, and genitourinary tract. Humans who carry HNF1B mutations develop heterogeneous renal abnormalities, including multicystic dysplastic kidneys, glomerulocystic kidney disease, renal agenesis, renal hypoplasia, and renal interstitial fibrosis. In the embryonic kidney, HNF-1β is required for ureteric bud branching, initiation of nephrogenesis, and nephron segmentation. Ablation of mouse Hnf1b in nephron progenitors causes defective tubulogenesis, whereas later inactivation in elongating tubules leads to cyst formation due to downregulation of cystic disease genes, including Umod, Pkhd1, and Pkd2. In the adult kidney, HNF-1β controls the expression of genes required for intrarenal metabolism and solute transport by tubular epithelial cells. Tubular abnormalities observed in HNF-1β nephropathy include hyperuricemia with or without gout, hypokalemia, hypomagnesemia, and polyuria. Recent studies have identified novel post-transcriptional and post-translational regulatory mechanisms that control HNF-1β expression and activity, including the miRNA cluster miR17 ∼ 92 and the interacting proteins PCBD1 and zyxin. Further understanding of the molecular mechanisms upstream and downstream of HNF-1β may lead to the development of new therapeutic approaches in cystic kidney disease and other HNF1B-related renal diseases.
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Affiliation(s)
- Silvia Ferrè
- Charles and Jane Pak Center for Mineral Metabolism and Clinical Research, Texas, USA,Department of Internal Medicine, University of Texas Southwestern Medical Center, Dallas, Texas, USA
| | - Peter Igarashi
- Department of Internal Medicine, University of Texas Southwestern Medical Center, Dallas, TX, USA. .,Department of Medicine, University of Minnesota Medical School, 420 Delaware St. SE, MMC 194, Minneapolis, MN, 55455, USA.
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16
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Chan SC, Zhang Y, Shao A, Avdulov S, Herrera J, Aboudehen K, Pontoglio M, Igarashi P. Mechanism of Fibrosis in HNF1B-Related Autosomal Dominant Tubulointerstitial Kidney Disease. J Am Soc Nephrol 2018; 29:2493-2509. [PMID: 30097458 DOI: 10.1681/asn.2018040437] [Citation(s) in RCA: 33] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/26/2018] [Accepted: 07/12/2018] [Indexed: 12/28/2022] Open
Abstract
BACKGROUND Mutation of HNF1B, the gene encoding transcription factor HNF-1β, is one cause of autosomal dominant tubulointerstitial kidney disease, a syndrome characterized by tubular cysts, renal fibrosis, and progressive decline in renal function. HNF-1β has also been implicated in epithelial-mesenchymal transition (EMT) pathways, and sustained EMT is associated with tissue fibrosis. The mechanism whereby mutated HNF1B leads to tubulointerstitial fibrosis is not known. METHODS To explore the mechanism of fibrosis, we created HNF-1β-deficient mIMCD3 renal epithelial cells, used RNA-sequencing analysis to reveal differentially expressed genes in wild-type and HNF-1β-deficient mIMCD3 cells, and performed cell lineage analysis in HNF-1β mutant mice. RESULTS The HNF-1β-deficient cells exhibited properties characteristic of mesenchymal cells such as fibroblasts, including spindle-shaped morphology, loss of contact inhibition, and increased cell migration. These cells also showed upregulation of fibrosis and EMT pathways, including upregulation of Twist2, Snail1, Snail2, and Zeb2, which are key EMT transcription factors. Mechanistically, HNF-1β directly represses Twist2, and ablation of Twist2 partially rescued the fibroblastic phenotype of HNF-1β mutant cells. Kidneys from HNF-1β mutant mice showed increased expression of Twist2 and its downstream target Snai2. Cell lineage analysis indicated that HNF-1β mutant epithelial cells do not transdifferentiate into kidney myofibroblasts. Rather, HNF-1β mutant epithelial cells secrete high levels of TGF-β ligands that activate downstream Smad transcription factors in renal interstitial cells. CONCLUSIONS Ablation of HNF-1β in renal epithelial cells leads to the activation of a Twist2-dependent transcriptional network that induces EMT and aberrant TGF-β signaling, resulting in renal fibrosis through a cell-nonautonomous mechanism.
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Affiliation(s)
| | - Ying Zhang
- Minnesota Supercomputing Institute, University of Minnesota, Minneapolis, Minnesota; and
| | | | | | | | | | - Marco Pontoglio
- Department of Development, Reproduction and Cancer, Institut Cochin, Institut National de la Santé et de la Recherche Médicale U1016/Centre National de la Recherche Scientifique Unité Mixte de Recherche 8104, Université Paris-Descartes, Paris, France
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17
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Sudrié-Arnaud B, Marguet F, Patrier S, Martinovic J, Louillet F, Broux F, Charbonnier F, Dranguet H, Coutant S, Vezain M, Lanos R, Tebani A, Fuller M, Lamari F, Chambon P, Brehin AC, Trestard L, Tournier I, Marret S, Verspyck E, Laquerrière A, Bekri S. Metabolic causes of nonimmune hydrops fetalis: A next-generation sequencing panel as a first-line investigation. Clin Chim Acta 2018; 481:1-8. [PMID: 29476731 DOI: 10.1016/j.cca.2018.02.023] [Citation(s) in RCA: 29] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/08/2018] [Accepted: 02/19/2018] [Indexed: 11/24/2022]
Abstract
PURPOSES Hydrops fetalis is a life-threatening fetal condition, and 85% of all cases are classified as nonimmune hydrops fetalis (NIHF). Up to 15% of NIHF cases may be due to inborn errors of metabolism (IEM), but a large proportion of cases linked to metabolic disorders remains undiagnosed. This lack of diagnosis may be related to the limitations of conventional biological procedures, which involve sequential investigations and require multiple samples and steps. In addition, this approach is time consuming. We have developed a next-generation sequencing (NGS) panel to investigate metabolic causes of NIHF, ascites, and polyhydramnios associated to another fetal abnormality. METHODS The hydrops fetalis (HydFet) panel was designed to cover the coding regions and flanking intronic sequences of 41 genes. A retrospective study of amniotic fluid samples from 40 subjects was conducted. A prospective study was subsequently initiated, and six samples were analyzed using the NGS panel. RESULTS Five IEM diagnoses were made using the HydFet panel (Niemann-Pick type C (NPC), Barth syndrome, HNF1Β deficiency, GM1 gangliosidosis, and Gaucher disease). This analysis also allowed the identification of 8p sequence triplication in an additional case. CONCLUSION NGS combined with robust bioinformatics analyses is a useful tool for identifying the causative variants of NIHF. Subsequent functional characterization of the protein encoded by the altered gene and morphological studies may confirm the diagnosis. This paradigm shift allows a significant improvement of IEM diagnosis in NIHF.
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Affiliation(s)
| | - Florent Marguet
- Department of Pathology, Rouen University Hospital, Rouen 76000, France; Normandie Univ, UNIROUEN, CHU Rouen, INSERM U1245, 76000 Rouen, France
| | - Sophie Patrier
- Department of Pathology, Rouen University Hospital, Rouen 76000, France
| | - Jelena Martinovic
- Unit of Fetal Pathology, Antoine Beclere Hospital, South Paris University, Clamart, France
| | - Ferielle Louillet
- Department of Pediatrics, Rouen University Hospital, 76000 Rouen, France
| | - Françoise Broux
- Department of Pediatrics, Rouen University Hospital, 76000 Rouen, France
| | | | - Hélène Dranguet
- Department of Metabolic Biochemistry, Rouen University Hospital, Rouen 76000, France
| | - Sophie Coutant
- Normandie Univ, UNIROUEN, CHU Rouen, INSERM U1245, 76000 Rouen, France
| | - Myriam Vezain
- Normandie Univ, UNIROUEN, CHU Rouen, INSERM U1245, 76000 Rouen, France
| | - Raphaël Lanos
- Normandie Univ, UNIROUEN, CHU Rouen, INSERM U1245, 76000 Rouen, France
| | - Abdellah Tebani
- Department of Metabolic Biochemistry, Rouen University Hospital, Rouen 76000, France
| | - Maria Fuller
- Genetics and Molecular Pathology, SA Pathology [at Women's and Children's Hospital], 72 King William Road, North Adelaide, South Australia 5006, Australia; Department of Pediatrics, University of Adelaide, Adelaide, South Australia 5005, Australia
| | - Foudil Lamari
- Bioclinic and Genetic Unit of Neurometabolic Diseases, Pitié-Salpêtrière Hospital, APHP, Paris 75013, France
| | - Pascal Chambon
- Normandie Univ, UNIROUEN, CHU Rouen, INSERM U1245, 76000 Rouen, France; Department of Genetics, Normandy Centre for Genomic and Personalized Medicine, Rouen University Hospital, Rouen 76000, France
| | - Anne-Claire Brehin
- Normandie Univ, UNIROUEN, CHU Rouen, INSERM U1245, 76000 Rouen, France; Department of Genetics, Normandy Centre for Genomic and Personalized Medicine, Rouen University Hospital, Rouen 76000, France
| | - Laetitia Trestard
- Department of Obstetrics and Gynecology, Belvedere Hospital, Mont-Saint-Aignan, France
| | - Isabelle Tournier
- Normandie Univ, UNIROUEN, CHU Rouen, INSERM U1245, 76000 Rouen, France
| | - Stéphane Marret
- Normandie Univ, UNIROUEN, CHU Rouen, INSERM U1245, 76000 Rouen, France; Department of Neonatal Pediatrics, Intensive Care and Neuropediatrics, Rouen University Hospital, 76000 Rouen, France
| | - Eric Verspyck
- Normandie Univ, UNIROUEN, CHU Rouen, INSERM U1245, 76000 Rouen, France; Department of Obstetrics and Gynecology, Rouen University Hospital, 76000 Rouen, France
| | - Annie Laquerrière
- Department of Pathology, Rouen University Hospital, Rouen 76000, France; Normandie Univ, UNIROUEN, CHU Rouen, INSERM U1245, 76000 Rouen, France
| | - Soumeya Bekri
- Department of Metabolic Biochemistry, Rouen University Hospital, Rouen 76000, France; Normandie Univ, UNIROUEN, CHU Rouen, INSERM U1245, 76000 Rouen, France.
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18
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Xu H, Li W, Qi K, Zhou J, Gu M, Wang Z. A novel function of NUCB2 in promoting the development and invasion of renal cell carcinoma. Oncol Lett 2017; 15:2425-2430. [PMID: 29434954 DOI: 10.3892/ol.2017.7563] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/02/2016] [Accepted: 06/15/2017] [Indexed: 11/06/2022] Open
Abstract
Previous studies have assessed nucleobindin 2 (NUCB2) expression in multiple urological cancer cell lines and detected its effect on renal cancer cell apoptosis. Additionally, certain reports have indicated a novel function of NUCB2 in promoting invasion in renal cancer. The levels of NUCB2 expression in different tumor cell lines were detected by quantitative reverse transcription polymerase chain reaction (RT-qPCR). Human NUCB2 and β-actin (ACTB) cDNA plasmids were inserted into lentivirus plasmids, which were then transfected into 786-O cells. Western blotting and RT-qPCR were then performed to determine the gene expression in NUCB2-knocked down cells. Apoptosis was also examined by flow cytometry subsequent to successful transfection. Finally, a transwell invasion assay was performed to investigate the effects on invasive abilities in renal cancer cells. The RT-qPCR results demonstrated a high expression of NUCB2 in 786-O, ACHN and LNCaP cells, and there was particularly high expression in renal cancer 786-O cells. Following successful transfection, downregulation of NUCB2 facilitated renal carcinoma cell apoptosis, as demonstrated by an increased apoptosis rate in the lenti-NUCB2-KD 786-O cells (13.72±0.84 vs. 3.32±0.10; lenti-NUCB2-KD group vs. negative control). Notably, a significant decreased invasion rate was observed in the NUCB2 knocked-down cells compared with negative control, suggesting an invasion-promoting effect of NUCB2. These results suggested a novel function of NUCB2 in the process of development and invasion in renal cell carcinoma. NUCB2 may be an important prognostic factor and target in the diagnosis and treatment of human renal cancer.
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Affiliation(s)
- Huan Xu
- Department of Urology, Shanghai Ninth People's Hospital, Shanghai Jiaotong University School of Medicine, Shanghai 200011, P.R. China
| | - Wenzhi Li
- Department of Urology, Shanghai Ninth People's Hospital, Shanghai Jiaotong University School of Medicine, Shanghai 200011, P.R. China.,Department of Urology, Linyi People's Hospital, Shandong University, Linyi, Shandong 276003, P.R. China
| | - Kai Qi
- Department of Surgery, Linyi People's Hospital, Shandong University, Linyi, Shandong 276003, P.R. China
| | - Juan Zhou
- Department of Urology, Shanghai Ninth People's Hospital, Shanghai Jiaotong University School of Medicine, Shanghai 200011, P.R. China
| | - Meng Gu
- Department of Urology, Shanghai Ninth People's Hospital, Shanghai Jiaotong University School of Medicine, Shanghai 200011, P.R. China
| | - Zhong Wang
- Department of Urology, Shanghai Ninth People's Hospital, Shanghai Jiaotong University School of Medicine, Shanghai 200011, P.R. China
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19
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Casemayou A, Fournel A, Bagattin A, Schanstra J, Belliere J, Decramer S, Marsal D, Gillet M, Chassaing N, Huart A, Pontoglio M, Knauf C, Bascands JL, Chauveau D, Faguer S. Hepatocyte Nuclear Factor-1 β Controls Mitochondrial Respiration in Renal Tubular Cells. J Am Soc Nephrol 2017; 28:3205-3217. [PMID: 28739648 DOI: 10.1681/asn.2016050508] [Citation(s) in RCA: 35] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/03/2016] [Accepted: 05/18/2017] [Indexed: 12/19/2022] Open
Abstract
AKI is a frequent condition that involves renal microcirculation impairment, infiltration of inflammatory cells with local production of proinflammatory cytokines, and subsequent epithelial disorders and mitochondrial dysfunction. Peroxisome proliferator-activated receptor γ coactivator 1-α (PPARGC1A), a coactivator of the transcription factor PPAR-γ that controls mitochondrial biogenesis and function, has a pivotal role in the early dysfunction of the proximal tubule and the subsequent renal repair. Here, we evaluated the potential role of hepatocyte nuclear factor-1β (HNF-1β) in regulating PPARGC1A expression in AKI. In mice, endotoxin injection to induce AKI also induced early and transient inflammation and PPARGC1A inhibition, which overlapped with downregulation of the HNF-1β transcriptional network. In vitro, exposure of proximal tubule cells to the inflammatory cytokines IFN-γ and TNF-α led to inhibition of HNF-1β transcriptional activity. Moreover, inhibition of HNF-1β significantly reduced PPARGC1A expression and altered mitochondrial morphology and respiration in proximal tubule cells. Chromatin immunoprecipitation assays and PCR analysis confirmed HNF-1β binding to the Ppargc1a promoter in mouse kidneys. We also demonstrated downregulation of renal PPARGC1A expression in a patient with an HNF1B germinal mutation. Thus, we propose that HNF-1β links extracellular inflammatory signals to mitochondrial dysfunction during AKI partly via PPARGC1A signaling. Our findings further strengthen the view of HNF1B-related nephropathy as a mitochondrial disorder in adulthood.
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Affiliation(s)
- Audrey Casemayou
- Institut National de la Santé et de la Recherche Médicale, U1048, Institut of Cardiovascular and Metabolic Disease, Toulouse, France.,University Toulouse III Paul-Sabatier, Toulouse, France
| | - Audren Fournel
- University Toulouse III Paul-Sabatier, Toulouse, France.,Institut National de la Santé et de la Recherche Médicale U1220, Institut de Recherche en Santé Digestive (IRSD), CHU Purpan-BP3028, 31024 Toulouse Cedex 3
| | - Alessia Bagattin
- Laboratoire d'Expression Génique, Développement et Maladies, Département Développement, Reproduction et Cancer, Institut National de la Santé et de la Recherche Médicale U1016, Institut Cochin, Paris, France
| | - Joost Schanstra
- Institut National de la Santé et de la Recherche Médicale, U1048, Institut of Cardiovascular and Metabolic Disease, Toulouse, France.,University Toulouse III Paul-Sabatier, Toulouse, France
| | - Julie Belliere
- Institut National de la Santé et de la Recherche Médicale, U1048, Institut of Cardiovascular and Metabolic Disease, Toulouse, France.,University Toulouse III Paul-Sabatier, Toulouse, France.,Department of Nephrology and Organ Transplantation, Center for Rare Renal Diseases, University Hospital of Toulouse, Toulouse, France
| | - Stéphane Decramer
- Institut National de la Santé et de la Recherche Médicale, U1048, Institut of Cardiovascular and Metabolic Disease, Toulouse, France.,University Toulouse III Paul-Sabatier, Toulouse, France.,Department of Nephrology, Internal Medicine and Hypertension, Center for Rare Renal Diseases, Children' Hospital, University Hospital of Toulouse, Toulouse, France
| | - Dimitri Marsal
- Institut National de la Santé et de la Recherche Médicale, U1048, Institut of Cardiovascular and Metabolic Disease, Toulouse, France.,University Toulouse III Paul-Sabatier, Toulouse, France
| | - Marion Gillet
- Institut National de la Santé et de la Recherche Médicale, U1048, Institut of Cardiovascular and Metabolic Disease, Toulouse, France.,University Toulouse III Paul-Sabatier, Toulouse, France
| | - Nicolas Chassaing
- Department of Medical Genetics, Hôpital Purpan, University Hospital of Toulouse, Toulouse, France; and
| | - Antoine Huart
- Department of Nephrology and Organ Transplantation, Center for Rare Renal Diseases, University Hospital of Toulouse, Toulouse, France
| | - Marco Pontoglio
- Laboratoire d'Expression Génique, Développement et Maladies, Département Développement, Reproduction et Cancer, Institut National de la Santé et de la Recherche Médicale U1016, Institut Cochin, Paris, France
| | - Claude Knauf
- University Toulouse III Paul-Sabatier, Toulouse, France.,Institut National de la Santé et de la Recherche Médicale U1220, Institut de Recherche en Santé Digestive (IRSD), CHU Purpan-BP3028, 31024 Toulouse Cedex 3
| | - Jean-Loup Bascands
- Institut National de la Santé et de la Recherche Médicale, U1188, DéTROI (Diabète Athérothrombose Thérapies Réunion Océan Indien), University of La Réunion
| | - Dominique Chauveau
- Institut National de la Santé et de la Recherche Médicale, U1048, Institut of Cardiovascular and Metabolic Disease, Toulouse, France.,University Toulouse III Paul-Sabatier, Toulouse, France.,Department of Nephrology and Organ Transplantation, Center for Rare Renal Diseases, University Hospital of Toulouse, Toulouse, France
| | - Stanislas Faguer
- Institut National de la Santé et de la Recherche Médicale, U1048, Institut of Cardiovascular and Metabolic Disease, Toulouse, France; .,University Toulouse III Paul-Sabatier, Toulouse, France.,Department of Nephrology and Organ Transplantation, Center for Rare Renal Diseases, University Hospital of Toulouse, Toulouse, France
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20
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Kompatscher A, de Baaij JHF, Aboudehen K, Hoefnagels APWM, Igarashi P, Bindels RJM, Veenstra GJC, Hoenderop JGJ. Loss of transcriptional activation of the potassium channel Kir5.1 by HNF1β drives autosomal dominant tubulointerstitial kidney disease. Kidney Int 2017; 92:1145-1156. [PMID: 28577853 DOI: 10.1016/j.kint.2017.03.034] [Citation(s) in RCA: 35] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/08/2016] [Revised: 03/08/2017] [Accepted: 03/23/2017] [Indexed: 12/20/2022]
Abstract
Hepatocyte nuclear factor 1 homeobox B (HNF1β) is an essential transcription factor for the development and functioning of the kidney. Mutations in HNF1β cause autosomal dominant tubulointerstitial kidney disease characterized by renal cysts and maturity-onset diabetes of the young (MODY). Moreover, these patients suffer from a severe electrolyte phenotype consisting of hypomagnesemia and hypokalemia. Until now, genes that are regulated by HNF1β are only partially known and do not fully explain the phenotype of the patients. Therefore, we performed chIP-seq in the immortalized mouse kidney cell line mpkDCT to identify HNF1β binding sites on a genome-wide scale. In total 7,421 HNF1β-binding sites were identified, including several genes involved in electrolyte transport and diabetes. A highly specific and conserved HNF1β site was identified in the promoter of Kcnj16 that encodes the potassium channel Kir5.1. Luciferase-promoter assays showed a 2.2-fold increase in Kcnj16 expression when HNF1β was present. Expression of the Hnf1β p.Lys156Glu mutant, previously identified in a patient with autosomal dominant tubulointerstitial kidney disease, did not activate Kcnj16 expression. Knockdown of Hnf1β in mpkDCT cells significantly reduced the appearance of Kcnj16 (Kir5.1) and Kcnj10 (Kir4.1) by 38% and 37%, respectively. These results were confirmed in a HNF1β renal knockout mouse which exhibited downregulation of Kcnj16, Kcnj10 and Slc12a3 transcripts in the kidney by 78%, 83% and 76%, respectively, compared to HNF1β wild-type mice. Thus, HNF1β is a transcriptional activator of Kcnj16. Hence, patients with HNF1β mutations may have reduced Kir5.1 activity in the kidney, resulting in hypokalemia and hypomagnesemia.
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Affiliation(s)
- Andreas Kompatscher
- Department of Physiology, Radboud Institute for Molecular Life Sciences, Radboud University Medical Centre, Nijmegen, Netherlands
| | - Jeroen H F de Baaij
- Department of Physiology, Radboud Institute for Molecular Life Sciences, Radboud University Medical Centre, Nijmegen, Netherlands
| | - Karam Aboudehen
- Department of Medicine, University of Minnesota Medical School, Minneapolis, Minnesota, USA
| | - Anke P W M Hoefnagels
- Department of Physiology, Radboud Institute for Molecular Life Sciences, Radboud University Medical Centre, Nijmegen, Netherlands
| | - Peter Igarashi
- Department of Medicine, University of Minnesota Medical School, Minneapolis, Minnesota, USA
| | - René J M Bindels
- Department of Physiology, Radboud Institute for Molecular Life Sciences, Radboud University Medical Centre, Nijmegen, Netherlands
| | - Gertjan J C Veenstra
- Department of Molecular Developmental Biology, Radboud Institute for Molecular Life Sciences, Radboud University, Nijmegen, Netherlands
| | - Joost G J Hoenderop
- Department of Physiology, Radboud Institute for Molecular Life Sciences, Radboud University Medical Centre, Nijmegen, Netherlands.
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21
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Aboudehen K, Noureddine L, Cobo-Stark P, Avdulov S, Farahani S, Gearhart MD, Bichet DG, Pontoglio M, Patel V, Igarashi P. Hepatocyte Nuclear Factor-1 β Regulates Urinary Concentration and Response to Hypertonicity. J Am Soc Nephrol 2017; 28:2887-2900. [PMID: 28507058 DOI: 10.1681/asn.2016101095] [Citation(s) in RCA: 24] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/14/2016] [Accepted: 04/16/2017] [Indexed: 12/18/2022] Open
Abstract
The transcription factor hepatocyte nuclear factor-1β (HNF-1β) is essential for normal kidney development and function. Inactivation of HNF-1β in mouse kidney tubules leads to early-onset cyst formation and postnatal lethality. Here, we used Pkhd1/Cre mice to delete HNF-1β specifically in renal collecting ducts (CDs). CD-specific HNF-1β mutant mice survived long term and developed slowly progressive cystic kidney disease, renal fibrosis, and hydronephrosis. Compared with wild-type littermates, HNF-1β mutant mice exhibited polyuria and polydipsia. Before the development of significant renal structural abnormalities, mutant mice exhibited low urine osmolality at baseline and after water restriction and administration of desmopressin. However, mutant and wild-type mice had similar plasma vasopressin and solute excretion levels. HNF-1β mutant kidneys showed increased expression of aquaporin-2 mRNA but mislocalized expression of aquaporin-2 protein in the cytoplasm of CD cells. Mutant kidneys also had decreased expression of the UT-A urea transporter and collectrin, which is involved in apical membrane vesicle trafficking. Treatment of HNF-1β mutant mIMCD3 cells with hypertonic NaCl inhibited the induction of osmoregulated genes, including Nr1h4, which encodes the transcription factor FXR that is required for maximal urinary concentration. Chromatin immunoprecipitation and sequencing experiments revealed HNF-1β binding to the Nr1h4 promoter in wild-type kidneys, and immunoblot analysis revealed downregulated expression of FXR in HNF-1β mutant kidneys. These findings reveal a novel role of HNF-1β in osmoregulation and identify multiple mechanisms, whereby mutations of HNF-1β produce defects in urinary concentration.
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Affiliation(s)
- Karam Aboudehen
- Departments of Medicine and.,Department of Internal Medicine, University of Texas Southwestern Medical Center, Dallas, Texas
| | - Lama Noureddine
- Department of Internal Medicine, University of Texas Southwestern Medical Center, Dallas, Texas.,Department of Internal Medicine, University of Iowa Carver College of Medicine, Iowa City, Iowa
| | - Patricia Cobo-Stark
- Department of Internal Medicine, University of Texas Southwestern Medical Center, Dallas, Texas
| | | | | | - Micah D Gearhart
- Genetics, Cell Biology and Development, University of Minnesota, Minneapolis, Minnesota
| | - Daniel G Bichet
- Departments of Medicine and.,Molecular and Integrative Physiology, Université de Montréal, Montreal, Quebec, Canada; and
| | - Marco Pontoglio
- Department of Development, Reproduction and Cancer, Institut Cochin, Institut National de la Santé et de la Recherche Médicale U1016/Centre National de la Recherche Scientifique Unité Mixte de Recherche 8104, Université Paris-Descartes, Paris, France
| | - Vishal Patel
- Department of Internal Medicine, University of Texas Southwestern Medical Center, Dallas, Texas
| | - Peter Igarashi
- Departments of Medicine and .,Department of Internal Medicine, University of Texas Southwestern Medical Center, Dallas, Texas
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