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Lanvin PL, Lebreton L, Lasseaux E, Creveaux I, Léauté-Labrèze C, Boralevi F, Morice-Picard F. A novel pathogenic variant in the FZD6 gene causes recessive nail dysplasia in a Moroccan family. Clin Exp Dermatol 2023; 48:1414-1417. [PMID: 37401642 DOI: 10.1093/ced/llad221] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/30/2023] [Revised: 04/30/2023] [Accepted: 06/21/2023] [Indexed: 07/05/2023]
Abstract
This report describes a patient with a novel homozygous nonsense variant, nail dysplasia and diabetes. Only a few patients have been described with FZD6 mutations and nail dysplasia, and the spectrum of associated manifestations has not been identified. Indeed, it is questionable whether there is a link between pancreatic involvement and the genetic abnormality identified.
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Affiliation(s)
- Pierre-Louis Lanvin
- Department of Dermatology and Pediatric Dermatology, National Reference Centre for Rare Disorders, Hôpital des Enfants Pellegrin, Centre Hospitalier Universitaire de Bordeaux, Bordeaux, France
- Department of Medical Genetics, Hôpital Pellegrin, Centre Hospitalier Universitaire de Bordeaux, Bordeaux, France
| | - Louis Lebreton
- Department of Biochemistry, Hôpital Pellegrin, Centre Hospitalier Universitaire de Bordeaux, Bordeaux, France
| | - Eulalie Lasseaux
- Department of Medical Genetics, Hôpital Pellegrin, Centre Hospitalier Universitaire de Bordeaux, Bordeaux, France
| | - Isabelle Creveaux
- Department of Biochemistry and Molecular Genetics, Centre Hospitalier Universitaire de Bordeaux, Bordeaux, France
| | - Christine Léauté-Labrèze
- Department of Dermatology and Pediatric Dermatology, National Reference Centre for Rare Disorders, Hôpital des Enfants Pellegrin, Centre Hospitalier Universitaire de Bordeaux, Bordeaux, France
| | - Franck Boralevi
- Department of Dermatology and Pediatric Dermatology, National Reference Centre for Rare Disorders, Hôpital des Enfants Pellegrin, Centre Hospitalier Universitaire de Bordeaux, Bordeaux, France
| | - Fanny Morice-Picard
- Department of Dermatology and Pediatric Dermatology, National Reference Centre for Rare Disorders, Hôpital des Enfants Pellegrin, Centre Hospitalier Universitaire de Bordeaux, Bordeaux, France
- Department of Medical Genetics, Hôpital Pellegrin, Centre Hospitalier Universitaire de Bordeaux, Bordeaux, France
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Saygı C, Alanay Y, Sezerman U, Yenenler A, Özören N. A possible founder mutation in FZD6 gene in a Turkish family with autosomal recessive nail dysplasia. BMC MEDICAL GENETICS 2019; 20:15. [PMID: 30642273 PMCID: PMC6332616 DOI: 10.1186/s12881-019-0746-6] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 07/27/2018] [Accepted: 01/04/2019] [Indexed: 12/26/2022]
Abstract
BACKGROUND Autosomal recessive nail dysplasia is characterized by thick and hard nails with a very slow growth on the hands and feet. Mutations in FZD6 gene were found to be associated with autosomal recessive nail dysplasia in 2011. Presently, only seven mutations have been reported in FZD6 gene; five mutations are clustered in the C-terminus, one is at the seventh transmembrane domain, and another is at the very beginning of third extracellular loop. METHODS Whole exome sequencing (WES) was applied to the index case, her one affected sister and her healthy consanguineous parents. The mutation was verified via Sanger sequencing. Molecular dynamics simulations of the predicted structures of native and mutant proteins were compared to gain insight into the pathogenicity mechanism of the mutation. RESULTS Here, we report a homozygous 8 bp deletion mutation, p.Gly559Aspfs*16; c.1676_1683delGAACCAGC, in FZD6 gene which causes a frameshift and creates a premature stop codon at position 16 of the new reading frame. Our molecular dynamics calculations predict that the pathogenicity of this frameshift mutation may be caused by the change in entropy of the protein with negative manner, disturbing the C-terminal domain structure, and hence interaction partners of FZD6. CONCLUSION We identified a homozygous deletion mutation in FZD6 in a consanguineous Turkish family with nail dysplasia. We also provide a molecular mechanism about the effects of the deletion on the protein structure and its possible motions. This study provides a pathogenicity mechanism for this mutation in nail dysplasia for the first time.
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Affiliation(s)
- Ceren Saygı
- Department of Molecular Biology and Genetics, Boğaziçi University, Istanbul, Turkey
| | - Yasemin Alanay
- Pediatric Genetics Unit, Department of Pediatrics, School of Medicine, Acibadem Mehmet Ali Aydinlar University, Istanbul, Turkey
| | - Uğur Sezerman
- Department of Medical Statistics and Bioinformatics, School of Medicine, Acibadem Mehmet Ali Aydinlar University, Istanbul, Turkey
| | - Aslı Yenenler
- Department of Medical Statistics and Bioinformatics, School of Medicine, Acibadem Mehmet Ali Aydinlar University, Istanbul, Turkey
| | - Nesrin Özören
- Department of Molecular Biology and Genetics, Boğaziçi University, Istanbul, Turkey
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Mohammadi-Asl J, Pourreza MR, Mohammadi A, Eskandari A, Mozafar-Jalali S, Tabatabaiefar MA. A novel pathogenic variant in the FZD6 gene causes recessive nail dysplasia in a large Iranian kindred. J Dermatol Sci 2017; 88:134-138. [PMID: 28545862 DOI: 10.1016/j.jdermsci.2017.04.017] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/28/2017] [Revised: 04/05/2017] [Accepted: 04/26/2017] [Indexed: 01/01/2023]
Abstract
BACKGROUND Nail disorder nonsyndromic congenital (NDNC) is a very rare clinically and genetically heterogeneous disease inherited both in recessive or dominant modes. FZD6 is a component of Wnt-FZD signaling pathway in which recessive loss-of-function variants in the corresponding genes could lead to nail anomalies. OBJECTIVE A large multiplex family with NDNC was referred for genetic counselling. Thorough genetic evaluation was performed. METHODS PCR-Sanger sequencing was carried out for the coding exons and exon-intron boundaries of the FZD6 gene. Co-segregation analysis, in silico evaluation and computational protein modeling was accomplished. RESULTS A homozygous 1bp deletion variant, c.1859delC (p.Ser620Cysfs*75), leading to a truncating protein was found in the patient. Parents were heterozygous for the variant. The variant was found to be co-segreagting with the phenotype in the family. Computational analysis and protein modeling revealed its pathogenic consequence by disturbing the cytoplasmic domain structure and signaling through loss of phosphorylation residues. The variant met the criteria of being pathogenic according to the ACMG guideline. CONCLUSIONS This is the first report of the genetic diagnosis of NDNC in Iran. We also report a novel pathogenic variant. The study of the FZD6 gene is recommended as the first step in the diagnostic routing of the autosomal recessive NDNC patients with enlarged nails.
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Affiliation(s)
- Javad Mohammadi-Asl
- Department of Medical Genetics, School of Medicine, Ahvaz Jundishapur University of Medical Sciences, Ahvaz, Iran
| | - Mohammad Reza Pourreza
- Department of Genetics and Molecular Biology, School of Medicine, Isfahan University of Medical Sciences, Isfahan, Iran
| | - Aliasgar Mohammadi
- Department of Genetics and Molecular Biology, School of Medicine, Isfahan University of Medical Sciences, Isfahan, Iran
| | - Ameneh Eskandari
- Department of Genetics and Molecular Biology, School of Medicine, Isfahan University of Medical Sciences, Isfahan, Iran
| | - Sima Mozafar-Jalali
- Department of Obstetrics and Gynecology, Arash Hospital, Tehran University of Medical Sciences, Tehran, Iran
| | - Mohammad Amin Tabatabaiefar
- Department of Genetics and Molecular Biology, School of Medicine, Isfahan University of Medical Sciences, Isfahan, Iran; Pediatric Inherited Diseases Research Center, Research Institute for Primordial Prevention of Non-Communicable Disease, Isfahan University of Medical Sciences, Isfahan, Iran.
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Kasparis C, Reid D, Wilson NJ, Okur V, Cole C, Hansen CD, Bosse K, Betz RC, Khan M, Smith FJD. Isolated recessive nail dysplasia caused by FZD6 mutations: report of three families and review of the literature. Clin Exp Dermatol 2016; 41:884-889. [PMID: 27786367 PMCID: PMC5132090 DOI: 10.1111/ced.12934] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 02/24/2016] [Indexed: 12/16/2022]
Abstract
Congenital abnormalities of the nail are rare conditions that are most frequently associated with congenital ectodermal syndromes involving several of the epidermal appendages including the skin, teeth, hair and nails. Isolated recessive nail dysplasia (IRND) is much rarer but has recently been recognized as a condition resulting in 20‐nail dystrophy in the absence of other cutaneous or extracutaneous findings. A few case reports have identified mutations in the Frizzled 6 (FZD6) gene in families presenting with abnormal nails consistent with IRND. These reports have highlighted the role of Wnt–FZD signalling in the process of nail formation. We report three families presenting with features of IRND, in whom we identified mutations in FZD6, including one previously unreported mutation.
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Affiliation(s)
- C Kasparis
- Dermatology Department, Walsall Healthcare NHS Trust, Walsall, UK
| | - D Reid
- Dermatology Department, Walsall Healthcare NHS Trust, Walsall, UK
| | - N J Wilson
- Centre for Dermatology and Genetic Medicine, Division of Biological Chemistry and Drug Discovery, School of Life Sciences, University of Dundee, Dundee, UK
| | - V Okur
- Department of Medical Genetics, Haydarpasa Numune Hospital, Istanbul, Turkey.,Department of Pediatrics, Columbia University Medical Center, New York, NY, USA
| | - C Cole
- Centre for Dermatology and Genetic Medicine, Division of Biological Chemistry and Drug Discovery, School of Life Sciences, University of Dundee, Dundee, UK.,Division of Computational Biology, School of Life Sciences, University of Dundee, Dundee, UK
| | - C D Hansen
- Department of Dermatology, University of Utah, Salt Lake City, UT, USA
| | - K Bosse
- Institute of Human Genetics, University of Bonn, Bonn, Germany.,Institute of Medical Genetics and Applied Genomics and Department of Obstetrics and Gynecology, University Hospital of Tübingen, Tübingen, Germany
| | - R C Betz
- Institute of Human Genetics, University of Bonn, Bonn, Germany
| | - M Khan
- Dermatology Department, Walsall Healthcare NHS Trust, Walsall, UK
| | - F J D Smith
- Centre for Dermatology and Genetic Medicine, Division of Biological Chemistry and Drug Discovery, School of Life Sciences, University of Dundee, Dundee, UK.,Pachyonychia Congenita Project, Salt Lake City, UT, USA
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Betz R. Nails - more than just an ectodermal appendage: the genetics behind isolated nail disorders. Br J Dermatol 2015; 173:886. [DOI: 10.1111/bjd.14148] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/13/2023]
Affiliation(s)
- R.C. Betz
- Institute of Human Genetics; Biomedical Center (BMZ); University of Bonn; Sigmund-Freud-Str. 25 D-53127 Bonn Germany
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Khan S, Basit S, Habib R, Kamal A, Muhammad N, Ahmad W. Genetics of human isolated hereditary nail disorders. Br J Dermatol 2015; 173:922-9. [PMID: 26149975 DOI: 10.1111/bjd.14023] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 07/02/2015] [Indexed: 12/17/2022]
Abstract
Human hereditary nail disorders constitute a rare and heterogeneous group of ectodermal dysplasias. They occur as isolated and/or syndromic ectodermal conditions where other ectodermal appendages are also involved, and can occur associated with skeletal dysplasia. 'Nail disorder, nonsyndromic congenital' (OMIM; Online Mendelian Inheritance in Man) is subclassified into 10 different types. The underlying genes identified thus far are expressed in the nail bed and play important roles in nail development and morphogenesis. Here, we review the current literature on nail disorders and present a coherent review on the genetics of nail disorders. This review will pave the way to identifying putative genes and pathways involved in nail development and morphogenesis.
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Affiliation(s)
- S Khan
- Department of Biotechnology and Genetic Engineering, Kohat University of Science and Technology (KUST), Kohat 26000, Khyber Pakhtunkhwa, Pakistan.,Genomic Core Facility, interim Translational Research Institute (iTRI), Academic Health System, Hamad Medical Corporation, 3050 Doha, Qatar
| | - S Basit
- Center for Genetics and Inherited Diseases, Taibah University Almadinah Almunawarah, 30001 Almadinah Almunawarah, Saudi Arabia
| | - R Habib
- Department of Biosciences, COMSATS Institute of Information Technology, Park Road, Islamabad, 45600, Pakistan
| | - A Kamal
- Department of Biotechnology and Genetic Engineering, Kohat University of Science and Technology (KUST), Kohat 26000, Khyber Pakhtunkhwa, Pakistan
| | - N Muhammad
- Department of Biotechnology and Genetic Engineering, Kohat University of Science and Technology (KUST), Kohat 26000, Khyber Pakhtunkhwa, Pakistan
| | - W Ahmad
- Department of Biochemistry, Faculty of Biological Sciences, Quaid-i-Azam University, Islamabad 45320, Pakistan
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Assessment of Frizzled 6 membrane mobility by FRAP supports G protein coupling and reveals WNT-Frizzled selectivity. Cell Signal 2014; 26:1943-9. [PMID: 24873871 DOI: 10.1016/j.cellsig.2014.05.012] [Citation(s) in RCA: 37] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/22/2014] [Accepted: 05/02/2014] [Indexed: 11/23/2022]
Abstract
The WNT receptors of the Frizzled family comprise ten mammalian isoforms, bind WNT proteins and mediate downstream signaling to regulate stem cell fate, neuronal differentiation, cell survival and more. WNT-induced signaling pathways are either β-catenin-dependent or -independent, thereby dividing the 19 mammalian WNT proteins into two groups. So far hardly any quantitative, pharmacological information is available about WNT-FZD interaction profiles, affinities or mechanisms of signaling specification through distinct WNT/FZD pairings. This lack of knowledge originates from difficulties with WNT purification and a lack of suitable assays, such as ligand binding assays and FZD activity readouts. In order to minimize this gap, we employ fluorescence recovery after photobleaching (FRAP) to investigate WNT effects on the lateral mobility of FZD6-GFP in living cells. Pharmacological uncoupling of heterotrimeric G proteins by pertussis toxin and N-ethylmaleimide argues that changes in FZD6 mobility are related to putative precoupling of heterotrimeric Gi/o proteins to FZD6. We show that recombinant WNT-1, -2, 3A, -4, -5A, -7A, -9B and -10B affect FZD6 surface mobility and thus act on this receptor. WNT-5B and WNT-11, on the other hand, have no effect on FZD6 mobility and we conclude that they do not act through FZD6. We introduce here a novel way to assess WNT-FZD interaction by live cell imaging allowing further mapping of WNT-FZD interactions and challenging previous experimental limitations. Increased understanding of WNT-FZD selectivity provides important insight into the biological function of this crucial signaling system with importance in developmental biology, stem cell regulation oncogenesis, and human disease.
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