1
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Mohammadihaji R, Gheibi N, Amiri S, Adibzadeh S, Abdolmaleki F, Elmi A, Rahmani B, Azad M. The effect of ω-6 fatty acid on WT1 and WIF-1 genes expression and inducing apoptosis in A375 melanoma cell line. GENE REPORTS 2022. [DOI: 10.1016/j.genrep.2022.101586] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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2
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Bezdicka M, Kaufman F, Krizova I, Dostalkova A, Rumlova M, Seeman T, Vondrak K, Fencl F, Zieg J, Soucek O. Alteration in DNA-binding affinity of Wilms tumor 1 protein due to WT1 genetic variants associated with steroid - resistant nephrotic syndrome in children. Sci Rep 2022; 12:8704. [PMID: 35610319 PMCID: PMC9130146 DOI: 10.1038/s41598-022-12760-x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/25/2021] [Accepted: 05/16/2022] [Indexed: 12/02/2022] Open
Abstract
Approximately one third of children with steroid-resistant nephrotic syndrome (SRNS) carry pathogenic variants in one of the many associated genes. The WT1 gene coding for the WT1 transcription factor is among the most frequently affected genes. Cases from the Czech national SRNS database were sequenced for exons 8 and 9 of the WT1 gene. Eight distinct exonic WT1 variants in nine children were found. Three children presented with isolated SRNS, while the other six manifested with additional features. To analyze the impact of WT1 genetic variants, wild type and mutant WT1 proteins were prepared and the DNA-binding affinity of these proteins to the target EGR1 sequence was measured by microscale thermophoresis. Three WT1 mutants showed significantly decreased DNA-binding affinity (p.Arg439Pro, p.His450Arg and p.Arg463Ter), another three mutants showed significantly increased binding affinity (p.Gln447Pro, p.Asp469Asn and p.His474Arg), and the two remaining mutants (p.Cys433Tyr and p.Arg467Trp) showed no change of DNA-binding affinity. The protein products of WT1 pathogenic variants had variable DNA-binding affinity, and no clear correlation with the clinical symptoms of the patients. Further research is needed to clarify the mechanisms of action of the distinct WT1 mutants; this could potentially lead to individualized treatment of a so far unfavourable disease.
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Affiliation(s)
- Martin Bezdicka
- Vera Vavrova Lab/VIAL, Department of Pediatrics, Second Faculty of Medicine, Charles University and Motol University Hospital, V Uvalu 84, 150 06, Prague, Czech Republic.
| | - Filip Kaufman
- Department of Biotechnology, University of Chemistry and Technology, Prague, Czech Republic
| | - Ivana Krizova
- Department of Biotechnology, University of Chemistry and Technology, Prague, Czech Republic
| | - Alzbeta Dostalkova
- Department of Biotechnology, University of Chemistry and Technology, Prague, Czech Republic
| | - Michaela Rumlova
- Department of Biotechnology, University of Chemistry and Technology, Prague, Czech Republic
| | - Tomas Seeman
- Department of Pediatrics, Second Faculty of Medicine, Charles University and Motol University Hospital, Prague, Czech Republic
| | - Karel Vondrak
- Department of Pediatrics, Second Faculty of Medicine, Charles University and Motol University Hospital, Prague, Czech Republic
| | - Filip Fencl
- Department of Pediatrics, Second Faculty of Medicine, Charles University and Motol University Hospital, Prague, Czech Republic
| | - Jakub Zieg
- Department of Pediatrics, Second Faculty of Medicine, Charles University and Motol University Hospital, Prague, Czech Republic
| | - Ondrej Soucek
- Vera Vavrova Lab/VIAL, Department of Pediatrics, Second Faculty of Medicine, Charles University and Motol University Hospital, V Uvalu 84, 150 06, Prague, Czech Republic
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3
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Every Beat You Take-The Wilms' Tumor Suppressor WT1 and the Heart. Int J Mol Sci 2021; 22:ijms22147675. [PMID: 34299295 PMCID: PMC8306835 DOI: 10.3390/ijms22147675] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/13/2021] [Revised: 07/06/2021] [Accepted: 07/16/2021] [Indexed: 12/23/2022] Open
Abstract
Nearly three decades ago, the Wilms’ tumor suppressor Wt1 was identified as a crucial regulator of heart development. Wt1 is a zinc finger transcription factor with multiple biological functions, implicated in the development of several organ systems, among them cardiovascular structures. This review summarizes the results from many research groups which allowed to establish a relevant function for Wt1 in cardiac development and disease. During development, Wt1 is involved in fundamental processes as the formation of the epicardium, epicardial epithelial-mesenchymal transition, coronary vessel development, valve formation, organization of the cardiac autonomous nervous system, and formation of the cardiac ventricles. Wt1 is further implicated in cardiac disease and repair in adult life. We summarize here the current knowledge about expression and function of Wt1 in heart development and disease and point out controversies to further stimulate additional research in the areas of cardiac development and pathophysiology. As re-activation of developmental programs is considered as paradigm for regeneration in response to injury, understanding of these processes and the molecules involved therein is essential for the development of therapeutic strategies, which we discuss on the example of WT1.
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Lipska-Ziętkiewicz BS, Ozaltin F, Hölttä T, Bockenhauer D, Bérody S, Levtchenko E, Vivarelli M, Webb H, Haffner D, Schaefer F, Boyer O. Genetic aspects of congenital nephrotic syndrome: a consensus statement from the ERKNet-ESPN inherited glomerulopathy working group. Eur J Hum Genet 2020; 28:1368-1378. [PMID: 32467597 PMCID: PMC7608398 DOI: 10.1038/s41431-020-0642-8] [Citation(s) in RCA: 19] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/10/2019] [Revised: 03/03/2020] [Accepted: 03/10/2020] [Indexed: 01/23/2023] Open
Abstract
Congenital nephrotic syndrome (CNS) is a heterogeneous group of disorders presenting with massive proteinuria within the first 3 months of life almost inevitably leading to end-stage kidney disease. The Work Group for the European Reference Network for Kidney Diseases (ERKNet) and the European Society for Pediatric Nephrology (ESPN) has developed consensus statement on genetic aspects of CNS diagnosis and management. The presented expert opinion recommends genetic diagnostics as the key diagnostic test to be ordered already during the initial evaluation of the patient, discusses which phenotyping workup should be performed and presents known genotype-phenotype correlations.
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Affiliation(s)
- Beata Stefania Lipska-Ziętkiewicz
- Clinical Genetics Unit, Department of Biology and Medical Genetics, Medical University of Gdańsk, Gdańsk, Poland.
- Centre for Rare Diseases, Medical University of Gdańsk, Gdańsk, Poland.
| | - Fatih Ozaltin
- Department of Pediatric Nephrology and Nephrogenetics Laboratory, Hacettepe University Faculty of Medicine, Ankara, Turkey.
| | - Tuula Hölttä
- Department of Pediatric Nephrology and Transplantation, The New Children's Hospital, HUS Helsinki University Hospital, Helsinki, Finland
| | - Detlef Bockenhauer
- UCL Department of Renal Medicine and Renal Unit, Great Ormond Street Hospital for Children NHS Foundation Trust, London, UK
| | - Sandra Bérody
- Department of Pediatric Nephrology, Reference Center for Hereditary Kidney Diseases (MARHEA), Necker Hospital, APHP, 75015, Paris, France
| | - Elena Levtchenko
- Division of Pediatric Nephrology, Department of Pediatrics, University Hospitals Leuven; Department of Development & Regeneration, University of Leuven, Leuven, Belgium
| | - Marina Vivarelli
- Division of Nephrology and Dialysis, Department of Pediatric Subspecialties, Bambino Gesù Pediatric Hospital and Research Center, Rome, Italy
| | - Hazel Webb
- UCL Department of Renal Medicine and Renal Unit, Great Ormond Street Hospital for Children NHS Foundation Trust, London, UK
| | - Dieter Haffner
- Department of Pediatric Kidney, Liver and Metabolic Diseases, Hannover Medical School Children's Hospital, Hannover, Germany
- Center for Congenital Kidney Diseases, Center for Rare Diseases, Hannover Medical School, Hannover, Germany
| | - Franz Schaefer
- Division of Pediatric Nephrology, Center for Pediatrics and Adolescent Medicine, Heidelberg, Germany.
| | - Olivia Boyer
- Department of Pediatric Nephrology, Reference Center for Hereditary Kidney Diseases (MARHEA), Necker Hospital, APHP, 75015, Paris, France
- Laboratory of Hereditary Kidney Diseases, Imagine Institute, INSERM, Paris Descartes University, U1163, Paris, France
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5
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Sato Y, Haruta M, Kaneko Y, Nakasato Y, Kurosawa H, Yoshihara S. Paternally inherited WT1 mutation plus uniparental disomy of 11p may be an essential mechanism for development of WT1-mutated familial Wilms tumor. Pediatr Blood Cancer 2019; 66:e27442. [PMID: 30221469 DOI: 10.1002/pbc.27442] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/09/2018] [Revised: 08/12/2018] [Accepted: 08/13/2018] [Indexed: 11/05/2022]
Affiliation(s)
- Yuya Sato
- Department of Pediatrics, Dokkyo Medical University School of Medicine, Mibu, Tochigi, Japan
| | - Masayuki Haruta
- Department of Cancer Diagnosis, Research Institute for Clinical Oncology, Saitama Cancer Center, Ina, Saitama, Japan
| | - Yasuhiko Kaneko
- Department of Cancer Diagnosis, Research Institute for Clinical Oncology, Saitama Cancer Center, Ina, Saitama, Japan
| | - Yoshimasa Nakasato
- Department of Anatomic and Diagnostic Pathology, Dokkyo Medical University School of Medicine, Mibu, Tochigi, Japan
| | - Hidemitsu Kurosawa
- Department of Pediatrics, Dokkyo Medical University School of Medicine, Mibu, Tochigi, Japan
| | - Shigemi Yoshihara
- Department of Pediatrics, Dokkyo Medical University School of Medicine, Mibu, Tochigi, Japan
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Hashimoto H, Zhang X, Zheng Y, Wilson GG, Cheng X. Denys-Drash syndrome associated WT1 glutamine 369 mutants have altered sequence-preferences and altered responses to epigenetic modifications. Nucleic Acids Res 2016; 44:10165-10176. [PMID: 27596598 PMCID: PMC5137435 DOI: 10.1093/nar/gkw766] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/26/2016] [Revised: 08/19/2016] [Accepted: 08/23/2016] [Indexed: 01/10/2023] Open
Abstract
Mutations in human zinc-finger transcription factor WT1 result in abnormal development of the kidneys and genitalia and an array of pediatric problems including nephropathy, blastoma, gonadal dysgenesis and genital discordance. Several overlapping phenotypes are associated with WT1 mutations, including Wilms tumors, Denys-Drash syndrome (DDS), Frasier syndrome (FS) and WAGR syndrome (Wilms tumor, aniridia, genitourinary malformations, and mental retardation). These conditions vary in severity from individual to individual; they can be fatal in early childhood, or relatively benign into adulthood. DDS mutations cluster predominantly in zinc fingers (ZF) 2 and 3 at the C-terminus of WT1, which together with ZF4 determine the sequence-specificity of DNA binding. We examined three DDS associated mutations in ZF2 of human WT1 where the normal glutamine at position 369 is replaced by arginine (Q369R), lysine (Q369K) or histidine (Q369H). These mutations alter the sequence-specificity of ZF2, we find, changing its affinity for certain bases and certain epigenetic forms of cytosine. X-ray crystallography of the DNA binding domains of normal WT1, Q369R and Q369H in complex with preferred sequences revealed the molecular interactions responsible for these affinity changes. DDS is inherited in an autosomal dominant fashion, implying a gain of function by mutant WT1 proteins. This gain, we speculate, might derive from the ability of the mutant proteins to sequester WT1 into unproductive oligomers, or to erroneously bind to variant target sequences.
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Affiliation(s)
- Hideharu Hashimoto
- Department of Biochemistry, Emory University School of Medicine, Atlanta, GA 30322, USA
| | - Xing Zhang
- Department of Biochemistry, Emory University School of Medicine, Atlanta, GA 30322, USA
| | - Yu Zheng
- RGENE, Inc., 953 Indiana Street, San Francisco, CA 94107, USA
| | | | - Xiaodong Cheng
- Department of Biochemistry, Emory University School of Medicine, Atlanta, GA 30322, USA
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7
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Pregnancy Outcome in Patients with Common Variable Immunodeficiency. J Clin Immunol 2015; 35:531-7. [DOI: 10.1007/s10875-015-0188-7] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/07/2015] [Accepted: 08/05/2015] [Indexed: 01/30/2023]
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8
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Kaneko Y, Okita H, Haruta M, Arai Y, Oue T, Tanaka Y, Horie H, Hinotsu S, Koshinaga T, Yoneda A, Ohtsuka Y, Taguchi T, Fukuzawa M. A high incidence of WT1 abnormality in bilateral Wilms tumours in Japan, and the penetrance rates in children with WT1 germline mutation. Br J Cancer 2015; 112:1121-33. [PMID: 25688735 PMCID: PMC4366886 DOI: 10.1038/bjc.2015.13] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/30/2014] [Revised: 12/24/2014] [Accepted: 12/31/2014] [Indexed: 01/22/2023] Open
Abstract
Background: Bilateral Wilms tumours (BWTs) occur by germline mutation of various predisposing genes; one of which is WT1 whose abnormality was reported in 17–38% of BWTs in Caucasians, whereas no such studies have been conducted in East-Asians. Carriers with WT1 mutations are increasing because of improved survival. Methods: Statuses of WT1 and IGF2 were examined in 45 BWTs from 31 patients with WT1 sequencing and SNP array-based genomic analyses. The penetrance rates were estimated in WT1-mutant familial Wilms tumours collected from the present and previous studies. Results: We detected WT1 abnormalities in 25 (81%) of 31 patients and two families, which were included in the penetrance rate analysis of familial Wilms tumour. Of 35 BWTs from the 25 patients, 31 had small homozygous WT1 mutations and uniparental disomy of IGF2, while 4 had large 11p13 deletions with the retention of 11p heterozygosity. The penetrance rate was 100% if children inherited small WT1 mutations from their fathers, and 67% if inherited the mutations from their mothers, or inherited or had de novo 11p13 deletions irrespective of parental origin (P=0.057). Conclusions: The high incidence of WT1 abnormalities in Japanese BWTs sharply contrasts with the lower incidence in Caucasian counterparts, and the penetrance rates should be clarified for genetic counselling of survivors with WT1 mutations.
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Affiliation(s)
- Y Kaneko
- 1] Department of Cancer Diagnosis, Research Institute for Clinical Oncology, Saitama Cancer Center, Ina, Saitama 362-0806, Japan [2] Japan Wilms Tumor Study Group (JWiTS), Itabashi-Ku, Tokyo 173-8610, Japan
| | - H Okita
- Japan Wilms Tumor Study Group (JWiTS), Itabashi-Ku, Tokyo 173-8610, Japan
| | - M Haruta
- 1] Department of Cancer Diagnosis, Research Institute for Clinical Oncology, Saitama Cancer Center, Ina, Saitama 362-0806, Japan [2] Japan Wilms Tumor Study Group (JWiTS), Itabashi-Ku, Tokyo 173-8610, Japan
| | - Y Arai
- Division of Cancer Genomics, National Cancer Center Research Institute, Chuo-Ku, Tokyo 104-0045, Japan
| | - T Oue
- Japan Wilms Tumor Study Group (JWiTS), Itabashi-Ku, Tokyo 173-8610, Japan
| | - Y Tanaka
- Japan Wilms Tumor Study Group (JWiTS), Itabashi-Ku, Tokyo 173-8610, Japan
| | - H Horie
- Japan Wilms Tumor Study Group (JWiTS), Itabashi-Ku, Tokyo 173-8610, Japan
| | - S Hinotsu
- Japan Wilms Tumor Study Group (JWiTS), Itabashi-Ku, Tokyo 173-8610, Japan
| | - T Koshinaga
- Japan Wilms Tumor Study Group (JWiTS), Itabashi-Ku, Tokyo 173-8610, Japan
| | - A Yoneda
- Japan Wilms Tumor Study Group (JWiTS), Itabashi-Ku, Tokyo 173-8610, Japan
| | - Y Ohtsuka
- Japan Wilms Tumor Study Group (JWiTS), Itabashi-Ku, Tokyo 173-8610, Japan
| | - T Taguchi
- Japan Wilms Tumor Study Group (JWiTS), Itabashi-Ku, Tokyo 173-8610, Japan
| | - M Fukuzawa
- Japan Wilms Tumor Study Group (JWiTS), Itabashi-Ku, Tokyo 173-8610, Japan
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9
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Lipska BS, Ranchin B, Iatropoulos P, Gellermann J, Melk A, Ozaltin F, Caridi G, Seeman T, Tory K, Jankauskiene A, Zurowska A, Szczepanska M, Wasilewska A, Harambat J, Trautmann A, Peco-Antic A, Borzecka H, Moczulska A, Saeed B, Bogdanovic R, Kalyoncu M, Simkova E, Erdogan O, Vrljicak K, Teixeira A, Azocar M, Schaefer F. Genotype-phenotype associations in WT1 glomerulopathy. Kidney Int 2014; 85:1169-78. [PMID: 24402088 DOI: 10.1038/ki.2013.519] [Citation(s) in RCA: 90] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/03/2013] [Revised: 10/04/2013] [Accepted: 10/17/2013] [Indexed: 02/08/2023]
Abstract
WT1 mutations cause a wide spectrum of renal and extrarenal manifestations. Here we evaluated disease prevalence, phenotype spectrum, and genotype-phenotype correlations of 61 patients with WT1-related steroid-resistant nephrotic syndrome relative to 700 WT1-negative patients, all with steroid-resistant nephrotic syndrome. WT1 patients more frequently presented with chronic kidney disease and hypertension at diagnosis and exhibited more rapid disease progression. Focal segmental glomerulosclerosis was equally prevalent in both cohorts, but diffuse mesangial sclerosis was largely specific for WT1 disease and was present in 34% of cases. Sex reversal and/or urogenital abnormalities (52%), Wilms tumor (38%), and gonadoblastoma (5%) were almost exclusive to WT1 disease. Missense substitutions affecting DNA-binding residues were associated with diffuse mesangial sclerosis (74%), early steroid-resistant nephrotic syndrome onset, and rapid progression to ESRD. Truncating mutations conferred the highest Wilms tumor risk (78%) but typically late-onset steroid-resistant nephrotic syndrome. Intronic (KTS) mutations were most likely to present as isolated steroid-resistant nephrotic syndrome (37%) with a median onset at an age of 4.5 years, focal segmental glomerulosclerosis on biopsy, and slow progression (median ESRD age 13.6 years). Thus, there is a wide range of expressivity, solid genotype-phenotype associations, and a high risk and significance of extrarenal complications in WT1-associated nephropathy. We suggest that all children with steroid-resistant nephrotic syndrome undergo WT1 gene screening.
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Affiliation(s)
- Beata S Lipska
- 1] Department of Biology and Genetics, Medical University of Gdansk, Gdansk, Poland [2] Division of Pediatric Nephrology, Center for Pediatrics and Adolescent Medicine, University of Heidelberg, Heidelberg, Germany
| | - Bruno Ranchin
- Service de Néphrologie Pédiatrique, Centre de Référence des Maladies Rénales Rares, Hôpital Femme Mère Enfant, Hospices Civils de Lyon and Université de Lyon, Bron, France
| | - Paraskevas Iatropoulos
- IRCCS - Istituto di Ricerche Farmacologiche Mario Negri, Clinical Research Centre for Rare Diseases Aldo e Cele Daccò, Ranica, Bergamo, Italy
| | - Jutta Gellermann
- Klinik für Pädiatrie/Nephrologie, Charité Campus Virchow-Klinikum, Berlin, Germany
| | - Anette Melk
- Pediatric Kidney, Liver and Metabolic Disease, MHH Children's Hospital, Hannover, Germany
| | - Fatih Ozaltin
- 1] Departments of Pediatric Nephrology and Rheumatology, Hacettepe University Faculty of Medicine, Ankara, Turkey [2] Nephrogenetics Laboratory, Hacettepe University Faculty of Medicine, Ankara, Turkey
| | - Gianluca Caridi
- Laboratorio di Fisiopatologia dell'Uremia e UOC di Nefrologia Dialisi e Trapianto, Istituto G Gaslini, Genova, Italy
| | - Tomas Seeman
- 1] 1st Department of Pediatrics, University Hospital Motol, Prague, Czech Republic [2] 2nd Faculty of Medicine, Charles University, Prague, Czech Republic
| | - Kalman Tory
- 1st Department of Pediatrics, Semmelweis University, Budapest, Hungary
| | | | - Aleksandra Zurowska
- Department Paediatrics, Nephrology and Hypertension, Medical University Gdansk, Gdansk, Poland
| | - Maria Szczepanska
- Dialysis Division for Children, Department and Clinics of Pediatrics, Medical University of Silesia in Katowice, Zabrze, Poland
| | - Anna Wasilewska
- Department of Pediatric Nephrology, University of Bialystok, Bialystok, Poland
| | - Jerome Harambat
- Service de Pédiatrie, Centre de Référence Maladies Rénales Rares du Sud Ouest, Centre Hospitalier Universitaire de Bordeaux, Bordeaux, France
| | - Agnes Trautmann
- Division of Pediatric Nephrology, Center for Pediatrics and Adolescent Medicine, University of Heidelberg, Heidelberg, Germany
| | - Amira Peco-Antic
- Division of Pediatric Nephrology, University Children's Hospital, Belgrade, Serbia
| | - Halina Borzecka
- Medical University Lublin, Pediatric Nephrology, Lublin, Poland
| | - Anna Moczulska
- Department of Pediatric Nephrology, Jagiellonian University Medical College, Krakow, Poland
| | - Bassam Saeed
- Department of Pediatric Nephrology, Kidney Hospital, Damascus, Syria
| | - Radovan Bogdanovic
- Department of Nephrology, Institute of Mother and Child Healthcare of Serbia, Belgrade, Serbia
| | - Mukaddes Kalyoncu
- Karadeniz Technical University, Faculty of Medicine, Pediatric Nephrology Department, Trabzon, Turkey
| | - Eva Simkova
- Paediatric Department, Dubai Hospital, Dubai, UAE
| | - Ozlem Erdogan
- Department of Pediatric Nephrology, Dr. Sami Ulus Maternity and Children's Hospital, Ankara, Turkey
| | - Kristina Vrljicak
- Division of Nephrology, Department of Pediatrics, Zagreb University Hospital Centre, University of Zagreb, Zagreb, Croatia
| | - Ana Teixeira
- Pediatric Nephrology, University Children's Hospital, Porto, Portugal
| | - Marta Azocar
- Unidad de Nefrología Infantil Hospital Luis Calvo Mackenna, Facultad de Medicina Universidad de Chile, Santiago de Chile, Chile
| | - Franz Schaefer
- Division of Pediatric Nephrology, Center for Pediatrics and Adolescent Medicine, University of Heidelberg, Heidelberg, Germany
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10
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Yang Y, Zhao F, Huang J, Nie X, Yu Z. Patients with different or identical genotypes of the WT1 gene present different phenotypes. Eur J Pediatr 2013; 172:1707-8. [PMID: 23835859 DOI: 10.1007/s00431-013-2086-4] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/16/2013] [Accepted: 06/22/2013] [Indexed: 02/05/2023]
Affiliation(s)
- Yonghui Yang
- Department of Pediatrics, Fuzhou Dongfang Hospital, No. 156 Xi Er Huan Bei Lu, Fuzhou, Fujian, 350025, People's Republic of China
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11
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Guaragna MS, Lutaif ACGB, Piveta CSC, Belangero VMS, Maciel-Guerra AT, Guerra G, De Mello MP. Two distinct WT1 mutations identified in patients and relatives with isolated nephrotic proteinuria. Biochem Biophys Res Commun 2013; 441:371-6. [PMID: 24161391 DOI: 10.1016/j.bbrc.2013.10.064] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/02/2013] [Accepted: 10/12/2013] [Indexed: 11/25/2022]
Abstract
Wilms' tumor type 1 gene (WT1) encodes a zinc-finger transcription factor that plays a key role during genitourinary development and in adult kidney. Mutations in exons 8 and 9 are associated with Denys-Drash Syndrome, whereas those occurring in the intron 9 donor splice site are associated with Frasier Syndrome. Familial cases of WT1 mutations are rare with only few cases described in the literature, whereas cases of WT1 mutations associated with isolated nephrotic proteinuria with or without focal segmental glomerular sclerosis (FSGS) are even rarer. Exons 8 and 9 of WT1 gene were analyzed in two non-related female patients and their parents. Patient 1, who presented with isolated nephrotic proteinuria and histologic pattern of FSGS, is heterozygous for the mutation c.1227+4C>T. This mutation was inherited from her mother, who had undergone kidney transplant due to FSGS. Patient 2 is heterozygous for the novel c.1178C>T transition inherited from her father. The putative effect of this nucleotide substitution on WT1 protein is p.Ser393Phe mutation located within the third zinc-finger domain. The patient and her father presented, respectively, isolated nephrotic proteinuria and chronic renal failure. These data highlight the importance of the inclusion of WT1 gene mutational analysis in patients with isolated nephrotic proteinuria, especially when similar conditions are referred to the family.
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Affiliation(s)
- Mara S Guaragna
- Centro de Biologia Molecular e Engenharia Genética - CBMEG, Universidade Estadual de Campinas, Unicamp, Campinas, SP, Brazil
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12
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Cooper DN, Krawczak M, Polychronakos C, Tyler-Smith C, Kehrer-Sawatzki H. Where genotype is not predictive of phenotype: towards an understanding of the molecular basis of reduced penetrance in human inherited disease. Hum Genet 2013; 132:1077-130. [PMID: 23820649 PMCID: PMC3778950 DOI: 10.1007/s00439-013-1331-2] [Citation(s) in RCA: 417] [Impact Index Per Article: 37.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/03/2013] [Accepted: 06/15/2013] [Indexed: 02/06/2023]
Abstract
Some individuals with a particular disease-causing mutation or genotype fail to express most if not all features of the disease in question, a phenomenon that is known as 'reduced (or incomplete) penetrance'. Reduced penetrance is not uncommon; indeed, there are many known examples of 'disease-causing mutations' that fail to cause disease in at least a proportion of the individuals who carry them. Reduced penetrance may therefore explain not only why genetic diseases are occasionally transmitted through unaffected parents, but also why healthy individuals can harbour quite large numbers of potentially disadvantageous variants in their genomes without suffering any obvious ill effects. Reduced penetrance can be a function of the specific mutation(s) involved or of allele dosage. It may also result from differential allelic expression, copy number variation or the modulating influence of additional genetic variants in cis or in trans. The penetrance of some pathogenic genotypes is known to be age- and/or sex-dependent. Variable penetrance may also reflect the action of unlinked modifier genes, epigenetic changes or environmental factors. At least in some cases, complete penetrance appears to require the presence of one or more genetic variants at other loci. In this review, we summarize the evidence for reduced penetrance being a widespread phenomenon in human genetics and explore some of the molecular mechanisms that may help to explain this enigmatic characteristic of human inherited disease.
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Affiliation(s)
- David N. Cooper
- Institute of Medical Genetics, School of Medicine, Cardiff University, Heath Park, Cardiff, CF14 4XN UK
| | - Michael Krawczak
- Institute of Medical Informatics and Statistics, Christian-Albrechts University, 24105 Kiel, Germany
| | | | - Chris Tyler-Smith
- The Wellcome Trust Sanger Institute, Wellcome Trust Genome Campus, Hinxton, Cambridge, CB10 1SA UK
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13
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Zhu C, Zhao F, Zhang W, Wu H, Chen Y, Ding G, Zhang A, Huang S. A familial WT1 mutation associated with incomplete Denys-Drash syndrome. Eur J Pediatr 2013; 172:1357-62. [PMID: 23715653 DOI: 10.1007/s00431-013-2004-9] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/16/2012] [Revised: 03/29/2013] [Accepted: 04/01/2013] [Indexed: 11/28/2022]
Abstract
UNLABELLED Denys-Drash syndrome (DDS) is a rare disorder characterized by nephropathy, male pseudohermaphroditism, and wilms tumor. Cases are thought to arise sporadically through a de novo mutation in the wilms tumor suppressor gene (WT1), which encodes a zinc finger protein that not only acts as a tumor suppressor but is essential for normal gonadogenesis, nephrogenesis, and development of the urogenital tract. In this report, we describe a family with the well-known missense mutation in exon 9 of the WT1 gene, 1180C>T (R394W), causing incomplete DDS and no symptoms in their father. The proband, a boy with 46, XY karyotype, was born with ambiguous genitalia, penoscrotal hypospadias, and bilateral inguinal hernias. At 2 years of age, he has proteinuria and diffuse mesangial sclerosis, but no wilms tumor has been detected. The elder sister of the proband, at 3 years of age, has normal genitalia, proteinuria, focal mesangial sclerosis but no wilms tumor. The WT1 mutation was detected in both patients, who have suspected DDS, and their father, who is phenotypically normal. CONCLUSION This case is unusual in that the 1180C>T mutation, which has been found in approximately 50 % of patients with complete DDS, has been inherited and is causing mild or no symptoms of DDS.
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Affiliation(s)
- Chunhua Zhu
- Department of Nephrology, Nanjing Children's Hospital, Nanjing Medical University, Nanjing, 210008, Jiangsu Province, China
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Yu Z, Yang Y, Feng D. Discordant phenotypes in monozygotic twins with identical de novo WT1 mutation. Clin Kidney J 2012; 5:221-2. [PMID: 26069768 PMCID: PMC4400508 DOI: 10.1093/ckj/sfs030] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/28/2011] [Accepted: 02/22/2012] [Indexed: 11/13/2022] Open
Abstract
Mutations in the WT1 gene, leading to Denys-Drash syndrome and Frasier syndrome, can also cause isolated steroid-resistant nephrotic syndrome (ISRNS). Previous studies have reported six pairs of monozygotic twins with WT1 mutations, including one presenting with discordant phenotypes with identical WT1 mutations being of paternal origin and five pairs of monozygotic twins presenting the same phenotype with identical WT1 mutations. In this study, we report on female monozygotic twins showing discordant phenotypes with an identical de novoWT1 mutation, R394W, and presenting incomplete Denys-Drash syndrome and ISRNS.
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Affiliation(s)
- Zihua Yu
- Department of Pediatrics, Fuzhou Dongfang Hospital, Fuzhou, P. R. China ; Department of Pediatrics, Fuzhou Clinical Medical College, Fujian Medical University, Fuzhou, P. R. China ; Department of Pediatrics, Dongfang Hospital, Xiamen University, Fuzhou, Fujian, P. R. China
| | - Yonghui Yang
- Department of Pediatrics, Fuzhou Dongfang Hospital, Fuzhou, P. R. China
| | - Dongning Feng
- Department of Pediatrics, Fuzhou Dongfang Hospital, Fuzhou, P. R. China
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