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Donnan MD, Scott RP, Onay T, Tarjus A, Onay UV, Quaggin SE. Genetic Deletion of Emp2 Does Not Cause Proteinuric Kidney Disease in Mice. Front Med (Lausanne) 2019; 6:189. [PMID: 31508419 PMCID: PMC6718710 DOI: 10.3389/fmed.2019.00189] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/24/2019] [Accepted: 08/09/2019] [Indexed: 12/15/2022] Open
Abstract
Nephrotic syndrome is one of the most common glomerular diseases in children and can be classified on the basis of steroid responsiveness. While multiple genetic causes have been discovered for steroid resistant nephrotic syndrome, the genetics of steroid sensitive nephrotic syndrome remains elusive. Mutations in Epithelial Membrane Protein 2 (EMP2), a member of the GAS3/PMP22 tetraspan family of proteins, were recently implicated as putative monogenic cause of steroid sensitive nephrotic syndrome. We investigated this hypothesis by developing Emp2 reporter and knockout mouse models. In lacZ reporter mice (engineered to drive expression of the enzyme β-galactosidase under the control of the endogenous murine Emp2 promoter), Emp2 promoter activity was not observed in podocytes but was particularly prominent in medium- and large-caliber arterial vessels in the kidney and other tissues where it localizes specifically in vascular smooth muscle cells (vSMCs) but not in the endothelium. Strong Emp2 expression was also found in non-vascular smooth muscle cells found in other organs like the stomach, bladder, and uterus. Global and podocyte-specific Emp2 knockout mice were viable and did not develop nephrotic syndrome showing no evidence of abnormal glomerular histology or ultrastructure. Altogether, our results do not support that loss of function of EMP2 represent a monogenic cause of proteinuric kidney disease. However, the expression pattern of Emp2 indicates that it may be relevant in smooth muscle function in various organs and tissues including the vasculature.
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Affiliation(s)
- Michael D Donnan
- Division of Nephrology and Hypertension, Feinberg Cardiovascular and Renal Research Institute, Northwestern University Feinberg School of Medicine, Chicago, IL, United States
| | - Rizaldy P Scott
- Division of Nephrology and Hypertension, Feinberg Cardiovascular and Renal Research Institute, Northwestern University Feinberg School of Medicine, Chicago, IL, United States
| | - Tuncer Onay
- Division of Nephrology and Hypertension, Feinberg Cardiovascular and Renal Research Institute, Northwestern University Feinberg School of Medicine, Chicago, IL, United States
| | - Antoine Tarjus
- Division of Nephrology and Hypertension, Feinberg Cardiovascular and Renal Research Institute, Northwestern University Feinberg School of Medicine, Chicago, IL, United States
| | - Ummiye Venus Onay
- Division of Nephrology and Hypertension, Feinberg Cardiovascular and Renal Research Institute, Northwestern University Feinberg School of Medicine, Chicago, IL, United States
| | - Susan E Quaggin
- Division of Nephrology and Hypertension, Feinberg Cardiovascular and Renal Research Institute, Northwestern University Feinberg School of Medicine, Chicago, IL, United States
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5
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Dorval G, Gribouval O, Martinez-Barquero V, Machuca E, Tête MJ, Baudouin V, Benoit S, Chabchoub I, Champion G, Chauveau D, Chehade H, Chouchane C, Cloarec S, Cochat P, Dahan K, Dantal J, Delmas Y, Deschênes G, Dolhem P, Durand D, Ekinci Z, El Karoui K, Fischbach M, Grunfeld JP, Guigonis V, Hachicha M, Hogan J, Hourmant M, Hummel A, Kamar N, Krummel T, Lacombe D, Llanas B, Mesnard L, Mohsin N, Niaudet P, Nivet H, Parvex P, Pietrement C, de Pontual L, Noble CP, Ribes D, Ronco P, Rondeau E, Sallee M, Tsimaratos M, Ulinski T, Salomon R, Antignac C, Boyer O. Clinical and genetic heterogeneity in familial steroid-sensitive nephrotic syndrome. Pediatr Nephrol 2018; 33:473-483. [PMID: 29058154 DOI: 10.1007/s00467-017-3819-9] [Citation(s) in RCA: 25] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/25/2017] [Revised: 09/05/2017] [Accepted: 09/07/2017] [Indexed: 10/18/2022]
Abstract
BACKGROUND Familial steroid-sensitive nephrotic syndrome (SSNS) is a rare condition. The disease pathophysiology remains elusive. However, bi-allelic mutations in the EMP2 gene were identified, and specific variations in HLA-DQA1 were linked to a high risk of developing the disease. METHODS Clinical data were analyzed in 59 SSNS families. EMP2 gene was sequenced in families with a potential autosomal recessive (AR) inheritance. Exome sequencing was performed in a subset of 13 families with potential AR inheritance. Two variations in HLA-DQA1 were genotyped in the whole cohort. RESULTS Transmission was compatible with an AR (n = 33) or autosomal dominant (AD, n = 26) inheritance, assuming that familial SSNS is a monogenic trait. Clinical features did not differ between AR and AD groups. All patients, including primary (n = 7) and secondary steroid resistant nephrotic syndrone (SRNS), (n = 13) were sensitive to additional immunosuppressive therapy. Both HLA-DQA1 variations were found to be highly linked to the disease (OR = 4.34 and OR = 4.89; p < 0.001). Exome sequencing did not reveal any pathogenic mutation, neither did EMP2 sequencing. CONCLUSIONS Taken together, these results highlight the clinical and genetic heterogeneity in familial SSNS. Clinical findings sustain an immune origin in all patients, whatever the initial steroid-sensitivity. The absence of a variant shared by two families and the HLA-DQA1 variation enrichments suggest a complex mode of inheritance.
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Affiliation(s)
- Guillaume Dorval
- INSERM UMR1163, Laboratory of Hereditary Kidney Diseases, Imagine Institute, 24 Boulevard du Montparnasse, 75015, Paris, France. .,Paris Descartes-Sorbonne Paris Cité University, Imagine Institute, Paris, France.
| | - Olivier Gribouval
- INSERM UMR1163, Laboratory of Hereditary Kidney Diseases, Imagine Institute, 24 Boulevard du Montparnasse, 75015, Paris, France.,Paris Descartes-Sorbonne Paris Cité University, Imagine Institute, Paris, France
| | - Vanesa Martinez-Barquero
- INSERM UMR1163, Laboratory of Hereditary Kidney Diseases, Imagine Institute, 24 Boulevard du Montparnasse, 75015, Paris, France.,Paris Descartes-Sorbonne Paris Cité University, Imagine Institute, Paris, France
| | - Eduardo Machuca
- INSERM UMR1163, Laboratory of Hereditary Kidney Diseases, Imagine Institute, 24 Boulevard du Montparnasse, 75015, Paris, France
| | - Marie-Josèphe Tête
- INSERM UMR1163, Laboratory of Hereditary Kidney Diseases, Imagine Institute, 24 Boulevard du Montparnasse, 75015, Paris, France.,Paris Descartes-Sorbonne Paris Cité University, Imagine Institute, Paris, France
| | - Véronique Baudouin
- Department of Pediatric Nephrology, Assistance Publique-Hôpitaux de Paris, Robert Debré Hospital, Paris, France
| | - Stéphane Benoit
- Department of Nephrology, University Hospital of Tours, Tours, France
| | - Imen Chabchoub
- Department of Pediatrics, Sfax University, Sfax, Tunisia
| | - Gérard Champion
- Department of Pediatrics, University Hospital of Angers, Angers, France
| | - Dominique Chauveau
- Department of Nephrology and Organ Transplantation, University Hospital Rangueil, Toulouse, France
| | - Hassib Chehade
- Department of Pediatrics, Division of Pediatric Nephrology, Lausanne University Hospital, Lausanne, Switzerland
| | - Chokri Chouchane
- Department of Pediatrics, Monastir University, Monastir, Tunisia
| | - Sylvie Cloarec
- Department of Nephrology, University Hospital of Tours, Tours, France
| | - Pierre Cochat
- Department of Pediatric Nephrology, Claude-Bernard Lyon 1 University, Bron, France
| | - Karin Dahan
- Department of Human Genetics, Institute of Pathology and Genetics, Gosselies, Belgium
| | - Jacques Dantal
- Nephrology and Immunology Department, University Hospital of Nantes, Nantes, France
| | - Yahsou Delmas
- Department of Nephrology, University Hospital of Bordeaux, Bordeaux, France
| | - Georges Deschênes
- Department of Pediatric Nephrology, Assistance Publique-Hôpitaux de Paris, Robert Debré Hospital, Paris, France
| | - Phillippe Dolhem
- Department of Pediatrics, Saint-Quentin Hospital, Saint-Quentin, France
| | - Dominique Durand
- Department of Nephrology and Organ Transplantation, University Hospital Rangueil, Toulouse, France
| | | | - Khalil El Karoui
- Department of Nephrology, Assistance Publique-Hôpitaux de Paris, Necker-Enfants Malades Hospital, Paris, France
| | - Michel Fischbach
- Nephrology Dialysis Transplantation Children's Unit, University Hospital Hautepierre, Strasbourg, France
| | - Jean-Pierre Grunfeld
- Department of Nephrology, Assistance Publique-Hôpitaux de Paris, Necker-Enfants Malades Hospital, Paris, France
| | - Vincent Guigonis
- Department of Pediatrics, University Hospital of Limoges, Limoges, France
| | | | - Julien Hogan
- Department of Pediatric Nephrology, Assistance Publique-Hôpitaux de Paris, Armand Trousseau Hospital, Paris, France
| | - Maryvonne Hourmant
- Nephrology and Immunology Department, University Hospital of Nantes, Nantes, France
| | - Aurélie Hummel
- Department of Nephrology, Assistance Publique-Hôpitaux de Paris, Necker-Enfants Malades Hospital, Paris, France
| | - Nassim Kamar
- Department of Nephrology and Organ Transplantation, University Hospital Rangueil, Toulouse, France
| | - Thierry Krummel
- Department of Nephrology, University Hospital Hautepierre, Strasbourg, France
| | - Didier Lacombe
- Department of Genetics, University Hospital of Bordeaux, Bordeaux, France
| | - Brigitte Llanas
- Department of Pediatrics, University Hospital of Bordeaux, Bordeaux, France
| | - Laurent Mesnard
- Department of Nephrology and Dialysis, Assistance Publique-Hôpitaux de Paris, Tenon Hospital, Paris, France.,Sorbonne University, UPMC University Paris 06, Paris, France.,INSERM, UMR_S 1155, 75020, Paris, France
| | - Nabil Mohsin
- College of Medicine, Sultan Qaboos University, Muscat, Oman
| | - Patrick Niaudet
- Department of Pediatric Nephrology, Centre de référence du syndrome néphrotique idiopathique de l'enfant et l'adulte, Assistance Publique-Hôpitaux de Paris, Necker-Enfants Malades Hospital, Paris, France.,Centre de Référence Syndrome Néphrotique Idiopathique de l'enfant et de l'adulte, Paris, France
| | - Hubert Nivet
- Department of Nephrology, University Hospital of Tours, Tours, France
| | - Paloma Parvex
- Department of Pediatrics, Division of Pediatric Nephrology, Geneva University Hospital, Geneva, Switzerland
| | - Christine Pietrement
- Departement of Pediatrics, Nephrology Unit, University Hospital of Reims, Reims, France.,Faculty of Medicine, Laboratory of Biochemistry and Molecular Biology, UMR, CNRS/URCA n°7369, University of Champagne-Ardenne, Reims, France
| | - Loic de Pontual
- Department of Pediatrics, Assistance Publique-Hôpitaux de Paris, Jean Verdier Hospital, Bondy, France
| | - Claire Pouteil Noble
- Department of Nephrology and Transplantation, University Hospital of Lyon, Lyon, France
| | - David Ribes
- Department of Nephrology and Organ Transplantation, University Hospital Rangueil, Toulouse, France
| | - Pierre Ronco
- Department of Nephrology and Dialysis, Assistance Publique-Hôpitaux de Paris, Tenon Hospital, Paris, France.,Sorbonne University, UPMC University Paris 06, Paris, France.,INSERM, UMR_S 1155, 75020, Paris, France
| | - Eric Rondeau
- Department of Nephrology and Dialysis, Assistance Publique-Hôpitaux de Paris, Tenon Hospital, Paris, France
| | - Marion Sallee
- Department of Nephrology and Kidney Transplantation, The Conception Hospital, Marseille, France
| | - Michel Tsimaratos
- Department of Multidisciplinary Pediatrics Timone, Assistance Publique Hôpitaux de Marseille, Aix-Marseille University, Marseille, France
| | - Tim Ulinski
- Department of Pediatric Nephrology, Assistance Publique-Hôpitaux de Paris, Armand Trousseau Hospital, Paris, France
| | - Rémi Salomon
- INSERM UMR1163, Laboratory of Hereditary Kidney Diseases, Imagine Institute, 24 Boulevard du Montparnasse, 75015, Paris, France.,Paris Descartes-Sorbonne Paris Cité University, Imagine Institute, Paris, France.,Department of Pediatric Nephrology, Centre de référence du syndrome néphrotique idiopathique de l'enfant et l'adulte, Assistance Publique-Hôpitaux de Paris, Necker-Enfants Malades Hospital, Paris, France.,Centre de Référence Syndrome Néphrotique Idiopathique de l'enfant et de l'adulte, Paris, France
| | - Corinne Antignac
- INSERM UMR1163, Laboratory of Hereditary Kidney Diseases, Imagine Institute, 24 Boulevard du Montparnasse, 75015, Paris, France.,Paris Descartes-Sorbonne Paris Cité University, Imagine Institute, Paris, France.,Centre de Référence Syndrome Néphrotique Idiopathique de l'enfant et de l'adulte, Paris, France.,Department of Genetics, Assistance Publique-Hôpitaux de Paris, Necker-Enfants malades Hospital, Paris, France
| | - Olivia Boyer
- INSERM UMR1163, Laboratory of Hereditary Kidney Diseases, Imagine Institute, 24 Boulevard du Montparnasse, 75015, Paris, France.,Paris Descartes-Sorbonne Paris Cité University, Imagine Institute, Paris, France.,Department of Pediatric Nephrology, Centre de référence du syndrome néphrotique idiopathique de l'enfant et l'adulte, Assistance Publique-Hôpitaux de Paris, Necker-Enfants Malades Hospital, Paris, France.,Centre de Référence Syndrome Néphrotique Idiopathique de l'enfant et de l'adulte, Paris, France
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7
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Gbadegesin RA, Adeyemo A, Webb NJA, Greenbaum LA, Abeyagunawardena A, Thalgahagoda S, Kale A, Gipson D, Srivastava T, Lin JJ, Chand D, Hunley TE, Brophy PD, Bagga A, Sinha A, Rheault MN, Ghali J, Nicholls K, Abraham E, Janjua HS, Omoloja A, Barletta GM, Cai Y, Milford DD, O'Brien C, Awan A, Belostotsky V, Smoyer WE, Homstad A, Hall G, Wu G, Nagaraj S, Wigfall D, Foreman J, Winn MP. HLA-DQA1 and PLCG2 Are Candidate Risk Loci for Childhood-Onset Steroid-Sensitive Nephrotic Syndrome. J Am Soc Nephrol 2014; 26:1701-10. [PMID: 25349203 DOI: 10.1681/asn.2014030247] [Citation(s) in RCA: 91] [Impact Index Per Article: 9.1] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/07/2014] [Accepted: 09/09/2014] [Indexed: 12/11/2022] Open
Abstract
Steroid-sensitive nephrotic syndrome (SSNS) accounts for >80% of cases of nephrotic syndrome in childhood. However, the etiology and pathogenesis of SSNS remain obscure. Hypothesizing that coding variation may underlie SSNS risk, we conducted an exome array association study of SSNS. We enrolled a discovery set of 363 persons (214 South Asian children with SSNS and 149 controls) and genotyped them using the Illumina HumanExome Beadchip. Four common single nucleotide polymorphisms (SNPs) in HLA-DQA1 and HLA-DQB1 (rs1129740, rs9273349, rs1071630, and rs1140343) were significantly associated with SSNS at or near the Bonferroni-adjusted P value for the number of single variants that were tested (odds ratio, 2.11; 95% confidence interval, 1.56 to 2.86; P=1.68×10(-6) (Fisher exact test). Two of these SNPs-the missense variants C34Y (rs1129740) and F41S (rs1071630) in HLA-DQA1-were replicated in an independent cohort of children of white European ancestry with SSNS (100 cases and ≤589 controls; P=1.42×10(-17)). In the rare variant gene set-based analysis, the best signal was found in PLCG2 (P=7.825×10(-5)). In conclusion, this exome array study identified HLA-DQA1 and PLCG2 missense coding variants as candidate loci for SSNS. The finding of a MHC class II locus underlying SSNS risk suggests a major role for immune response in the pathogenesis of SSNS.
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Affiliation(s)
- Rasheed A Gbadegesin
- Department of Pediatrics, Division of Nephrology and Center for Human Genetics, Duke University Medical Center, Durham, North Carolina
| | - Adebowale Adeyemo
- Center for Research on Genomics and Global Health, National Human Genome Research Institute, National Institutes of Health, Bethesda, Maryland;
| | - Nicholas J A Webb
- Department of Pediatric Nephrology and NIHR/Wellcome Trust Children's Clinical Research Facility, The University of Manchester, Manchester Academic Health Science Centre, Royal Manchester Children's Hospital, Manchester, United Kingdom
| | - Larry A Greenbaum
- Division of Pediatric Nephrology, Emory University School of Medicine and Children's Healthcare of Atlanta, Georgia
| | | | | | - Arundhati Kale
- Division of Nephrology, Baylor College of Medicine and Texas Children's Hospital, Houston, Texas
| | - Debbie Gipson
- Department of Pediatrics, Division of Nephrology, University of Michigan, Ann Arbor, Michigan
| | - Tarak Srivastava
- Division of Nephrology, Children's Mercy Hospital, Kansas City, Missouri
| | - Jen-Jar Lin
- Department of Pediatrics, Division of Nephrology, Wake Forest University Baptist Medical Center, Winston-Salem, North Carolina
| | - Deepa Chand
- Department of Pediatrics, Division of Nephrology, Rush University, Chicago, Illinois
| | - Tracy E Hunley
- Department of Pediatrics, Division of Nephrology, Vanderbilt University, Nashville, Tennessee
| | - Patrick D Brophy
- Department of Pediatrics, Division of Nephrology, University of Iowa, Iowa City, Iowa
| | - Arvind Bagga
- Department of Pediatrics, Division of Nephrology, All India Institute of Medical Science, Ansari Nagar, New Delhi, India
| | - Aditi Sinha
- Department of Pediatrics, Division of Nephrology, All India Institute of Medical Science, Ansari Nagar, New Delhi, India
| | - Michelle N Rheault
- Department of Pediatrics, Division of Nephrology, University of Minnesota Amplatz Children's Hospital, Minneapolis, Minnesota
| | - Joanna Ghali
- Department of Nephrology, Royal Melbourne Hospital, Parkville, Australia
| | - Kathy Nicholls
- Department of Nephrology, Royal Melbourne Hospital, Parkville, Australia
| | - Elizabeth Abraham
- Department of Pediatrics, Division of Nephrology, St. Louis University, St. Louis, Missouri
| | - Halima S Janjua
- Pediatric Institute, Center for Pediatric Nephrology, Cleveland Clinic, Cleveland, Ohio
| | - Abiodun Omoloja
- Division of Nephrology, Dayton Children's Hospital, Dayton, Ohio
| | | | - Yi Cai
- Division of Nephrology, Helen Devos Children's Hospital, Grand Rapids, Michigan
| | | | | | - Atif Awan
- Division of Nephrology, The Children's University Hospital, Dublin, Ireland
| | - Vladimir Belostotsky
- Department of Pediatrics, Division of Nephrology, Leeds Teaching Hospital, Leeds, United Kingdom
| | - William E Smoyer
- Center for Clinical and Translational Research, Research Institute at Nationwide Children's Hospital, Columbus, Ohio; and
| | - Alison Homstad
- Department of Pediatrics, Division of Nephrology and Center for Human Genetics, Duke University Medical Center, Durham, North Carolina
| | - Gentzon Hall
- Department of Medicine, Division of Nephrology and Center for Human Genetics, Duke University Medical Center, Durham, North Carolina
| | - Guanghong Wu
- Department of Medicine, Division of Nephrology and Center for Human Genetics, Duke University Medical Center, Durham, North Carolina
| | - Shashi Nagaraj
- Department of Pediatrics, Division of Nephrology and Center for Human Genetics, Duke University Medical Center, Durham, North Carolina
| | - Delbert Wigfall
- Department of Pediatrics, Division of Nephrology and Center for Human Genetics, Duke University Medical Center, Durham, North Carolina
| | - John Foreman
- Department of Pediatrics, Division of Nephrology and Center for Human Genetics, Duke University Medical Center, Durham, North Carolina
| | - Michelle P Winn
- Department of Medicine, Division of Nephrology and Center for Human Genetics, Duke University Medical Center, Durham, North Carolina
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