1
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Mohamad J, Samuelov L, Malchin N, Rabinowitz T, Assaf S, Malki L, Malovitski K, Israeli S, Grafi-Cohen M, Bitterman-Deutsch O, Molho-Pessach V, Cohen-Barak E, Bach G, Garty BZ, Bergman R, Harel A, Nanda A, Lestringant GG, McGrath J, Shalev S, Shomron N, Mashiah J, Eskin-Schwartz M, Sprecher E, Sarig O. Molecular epidemiology of non-syndromic autosomal recessive congenital ichthyosis in a Middle-Eastern population. Exp Dermatol 2021; 30:1290-1297. [PMID: 33786896 DOI: 10.1111/exd.14345] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/29/2020] [Revised: 03/04/2021] [Accepted: 03/26/2021] [Indexed: 02/02/2023]
Abstract
Autosomal recessive congenital ichthyosis (ARCI) is a rare and heterogeneous skin cornification disorder presenting with generalized scaling and varying degrees of erythema. Clinical manifestations range from lamellar ichthyosis (LI), congenital ichthyosiform erythroderma (CIE) through the most severe form of ARCI, Harlequin ichthyosis (HI). We used homozygosity mapping, whole-exome and direct sequencing to delineate the relative distribution of pathogenic variants as well as identify genotype-phenotype correlations in a cohort of 62 Middle Eastern families with ARCI of various ethnic backgrounds. Pathogenic variants were identified in most ARCI-associated genes including TGM1 (21%), CYP4F22 (18%), ALOX12B (14%), ABCA12 (10%), ALOXE3 (6%), NIPAL4 (5%), PNPLA1 (3%), LIPN (2%) and SDR9C7 (2%). In 19% of cases, no mutation was identified. Our cohort revealed a higher prevalence of CYP4F22 and ABCA12 pathogenic variants and a lower prevalence of TGM1 and NIPAL4 variants, as compared to data obtained in other regions of the world. Most variants (89%) in ALOX12B were associated with CIE and were the most common cause of ARCI among patients of Muslim origin (26%). Palmoplantar keratoderma associated with fissures was exclusively a result of pathogenic variants in TGM1. To our knowledge, this is the largest cohort study of ARCI in the Middle-Eastern population reported to date. Our data demonstrate the importance of population-tailored mutation screening strategies and shed light upon specific genotype-phenotype correlations.
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Affiliation(s)
- Janan Mohamad
- Division of Dermatology and Pediatric Dermatology Unit, Tel Aviv Sourasky Medical Center, Tel Aviv, Israel.,Sackler Faculty of Medicine, Tel Aviv University, Tel Aviv, Israel
| | - Liat Samuelov
- Division of Dermatology and Pediatric Dermatology Unit, Tel Aviv Sourasky Medical Center, Tel Aviv, Israel.,Sackler Faculty of Medicine, Tel Aviv University, Tel Aviv, Israel
| | - Natalia Malchin
- Division of Dermatology and Pediatric Dermatology Unit, Tel Aviv Sourasky Medical Center, Tel Aviv, Israel
| | - Tom Rabinowitz
- Sackler Faculty of Medicine, Tel Aviv University, Tel Aviv, Israel
| | - Sari Assaf
- Division of Dermatology and Pediatric Dermatology Unit, Tel Aviv Sourasky Medical Center, Tel Aviv, Israel.,Sackler Faculty of Medicine, Tel Aviv University, Tel Aviv, Israel
| | - Liron Malki
- Division of Dermatology and Pediatric Dermatology Unit, Tel Aviv Sourasky Medical Center, Tel Aviv, Israel.,Sackler Faculty of Medicine, Tel Aviv University, Tel Aviv, Israel
| | - Kiril Malovitski
- Division of Dermatology and Pediatric Dermatology Unit, Tel Aviv Sourasky Medical Center, Tel Aviv, Israel.,Sackler Faculty of Medicine, Tel Aviv University, Tel Aviv, Israel
| | - Shirli Israeli
- Division of Dermatology and Pediatric Dermatology Unit, Tel Aviv Sourasky Medical Center, Tel Aviv, Israel
| | - Meital Grafi-Cohen
- Division of Dermatology and Pediatric Dermatology Unit, Tel Aviv Sourasky Medical Center, Tel Aviv, Israel
| | | | - Vered Molho-Pessach
- Pediatric Dermatology Service, Department of Dermatology, The Faculty of Medicine, Hadassah Medical Center, Hebrew University of Jerusalem, Jerusalem, Israel
| | - Eran Cohen-Barak
- Department of Dermatology, Haemek Medical Center, Afula, Israel.,Bruce and Ruth Rappaprt Faculty of Medicine, Technion, Haifa, Israel
| | - Gideon Bach
- Department of Human Genetics, Hadassah Hebrew University Hospital, Jerusalem, Israel
| | - Ben Zion Garty
- Sackler Faculty of Medicine, Tel Aviv University, Tel Aviv, Israel.,Schneider Childrens Medical Center, Petah Tikva, Israel
| | - Reuven Bergman
- Department of Dermatology, Rambam Medical Center, Haifa, Israel
| | - Avikam Harel
- Division of Dermatology and Pediatric Dermatology Unit, Tel Aviv Sourasky Medical Center, Tel Aviv, Israel
| | - Arti Nanda
- As'ad Al-Hamad Dermatology Center, Al-Sabah Hospital, Surra, Kuwait
| | | | - John McGrath
- St. John's Institute of Dermatology, King's College London, London, UK
| | - Stavit Shalev
- Bruce and Ruth Rappaprt Faculty of Medicine, Technion, Haifa, Israel.,Institute of Human Genetics, Haemek Medical Center, Afula, Israel
| | - Noam Shomron
- Sackler Faculty of Medicine, Tel Aviv University, Tel Aviv, Israel
| | - Jacob Mashiah
- Division of Dermatology and Pediatric Dermatology Unit, Tel Aviv Sourasky Medical Center, Tel Aviv, Israel.,Sackler Faculty of Medicine, Tel Aviv University, Tel Aviv, Israel
| | - Marina Eskin-Schwartz
- Genetics Institute at Soroka University Medical Center, Faculty of Health Sciences, Ben-Gurion University of the Negev, Beer-Sheva, Israel
| | - Eli Sprecher
- Division of Dermatology and Pediatric Dermatology Unit, Tel Aviv Sourasky Medical Center, Tel Aviv, Israel.,Sackler Faculty of Medicine, Tel Aviv University, Tel Aviv, Israel
| | - Ofer Sarig
- Division of Dermatology and Pediatric Dermatology Unit, Tel Aviv Sourasky Medical Center, Tel Aviv, Israel
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2
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Pavlovsky M, Peled A, Samuelov L, Malki L, Malovitski K, Assaf S, Mohamad J, Meijers O, Eskin-Schwartz M, Sarig O, Sprecher E. Molecular epidemiology of pachyonychia congenita in the Israeli population. Clin Exp Dermatol 2020; 46:663-668. [PMID: 33190296 DOI: 10.1111/ced.14509] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 11/10/2020] [Indexed: 11/29/2022]
Abstract
BACKGROUND Pachyonychia congenita (PC) is a rare autosomal dominant disorder featuring palmoplantar keratoderma, nail dystrophy, oral leucokeratosis, pilosebaceous cysts and natal teeth. PC results from dominant mutations in one of five genes (KRT6A, KRT6B, KRT6C, KRT16, KRT17) encoding keratin proteins. AIM To delineate the clinical and genetic features of PC in a series of Israeli patients. METHODS We used direct sequencing of genomic DNA, and also used cDNA sequencing where applicable. RESULTS We collected clinical information and molecular data in a cohort of Israeli families diagnosed with PC (n = 16). Most of the patients were Ashkenazi Jews and had a family history of PC. The most common clinical findings were painful focal plantar keratoderma (94%) accompanied by nail dystrophy (81%), pilosebaceous cysts (31%) and prenatal/natal teeth (13%). In contrast to the high prevalence of KRT6A mutations in other populations, we found that KRT16 mutations were the most common type among Israeli patients with PC (56%). Most (77%) of the Israeli patients with PC with KRT16 mutation carried the same variant (c.380G>A; p.R127H) and shared the same haplotype around the KRT16 locus, suggestive of a founder effect. CONCLUSION The data gleaned from this study emphasizes the importance of population-specific tailored diagnostic strategies.
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Affiliation(s)
- M Pavlovsky
- Division of Dermatology, Tel Aviv Sourasky Medical Center, Tel Aviv, Israel
| | - A Peled
- Division of Dermatology, Tel Aviv Sourasky Medical Center, Tel Aviv, Israel
| | - L Samuelov
- Division of Dermatology, Tel Aviv Sourasky Medical Center, Tel Aviv, Israel.,Sackler Faculty of Medicine, Tel Aviv University, Tel Aviv, Israel
| | - L Malki
- Sackler Faculty of Medicine, Tel Aviv University, Tel Aviv, Israel
| | - K Malovitski
- Sackler Faculty of Medicine, Tel Aviv University, Tel Aviv, Israel
| | - S Assaf
- Sackler Faculty of Medicine, Tel Aviv University, Tel Aviv, Israel
| | - J Mohamad
- Division of Dermatology, Tel Aviv Sourasky Medical Center, Tel Aviv, Israel.,Sackler Faculty of Medicine, Tel Aviv University, Tel Aviv, Israel
| | - O Meijers
- Division of Dermatology, Tel Aviv Sourasky Medical Center, Tel Aviv, Israel
| | - M Eskin-Schwartz
- Genetics Institute at Soroka University Medical Center and Faculty of Health Sciences, Ben-Gurion University of the Negev, Beer-Sheva, Israel
| | - O Sarig
- Division of Dermatology, Tel Aviv Sourasky Medical Center, Tel Aviv, Israel
| | - E Sprecher
- Division of Dermatology, Tel Aviv Sourasky Medical Center, Tel Aviv, Israel.,Sackler Faculty of Medicine, Tel Aviv University, Tel Aviv, Israel
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3
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Has C, Liu L, Bolling MC, Charlesworth AV, El Hachem M, Escámez MJ, Fuentes I, Büchel S, Hiremagalore R, Pohla-Gubo G, van den Akker PC, Wertheim-Tysarowska K, Zambruno G. Clinical practice guidelines for laboratory diagnosis of epidermolysis bullosa. Br J Dermatol 2019; 182:574-592. [PMID: 31090061 PMCID: PMC7064925 DOI: 10.1111/bjd.18128] [Citation(s) in RCA: 66] [Impact Index Per Article: 13.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 05/09/2019] [Indexed: 02/06/2023]
Abstract
Linked Comment: https://doi.org/10.1111/bjd.18377. https://doi.org/10.1111/bjd.18829 available online
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Affiliation(s)
- C Has
- Department of Dermatology, Medical Center - University of Freiburg, Faculty of Medicine, University of Freiburg, Freiburg, Germany
| | - L Liu
- Viapath, St Thomas' Hospital, London, U.K
| | - M C Bolling
- Department of Dermatology, University of Groningen, University Medical Center Groningen, Groningen, the Netherlands
| | - A V Charlesworth
- Centre de Reference des Maladies Rares de la Peau et des Muqueuses d'Origine Génétique, L'Archet Hôpital, Nice, France
| | - M El Hachem
- Dermatology Unit, Bambino Gesù Children's Hospital, IRCCS, Rome, Italy
| | - M J Escámez
- Bioengineering Department at Universidad Carlos III de Madrid (UC3M), Regenerative Medicine Unit at CIEMAT - U714 CIBER on Rare Diseases (ISCIII), Instituto de Investigación Sanitaria Fundación Jiménez Diaz (IISFJD), Madrid, Spain
| | - I Fuentes
- Fundación DEBRA Chile, Santiago, Chile.,Centro de Genética y Genómica, Facultad de Medicina, Clínica Alemana Universidad del Desarrollo, Santiago, Chile
| | - S Büchel
- Department of Dermatology, Medical Center - University of Freiburg, Faculty of Medicine, University of Freiburg, Freiburg, Germany
| | - R Hiremagalore
- Adjunct Faculty, Centre for Human Genetics and Department of Dermatology and Pediatrics, Manipal Hospital, Bengaluru, India
| | - G Pohla-Gubo
- EB House Austria, Department of Dermatology, University Hospital of the Paracelsus Medical University, Salzburg, Austria
| | - P C van den Akker
- Department of Genetics, University of Groningen, University Medical Center Groningen, Groningen, the Netherlands
| | | | - G Zambruno
- Dermatology Unit, Bambino Gesù Children's Hospital, IRCCS, Rome, Italy
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4
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Vahidnezhad H, Youssefian L, Jazayeri A, Uitto J. Research Techniques Made Simple: Genome-Wide Homozygosity/Autozygosity Mapping Is a Powerful Tool for Identifying Candidate Genes in Autosomal Recessive Genetic Diseases. J Invest Dermatol 2019; 138:1893-1900. [PMID: 30143075 DOI: 10.1016/j.jid.2018.06.170] [Citation(s) in RCA: 32] [Impact Index Per Article: 6.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/11/2018] [Revised: 06/13/2018] [Accepted: 06/14/2018] [Indexed: 11/28/2022]
Abstract
Homozygosity mapping (HM), also known as autozygosity mapping, was originally used to map genes underlying homozygous autosomal recessive Mendelian diseases in patients from closely genetically related populations, followed by Sanger sequencing. With the increase in use of next-generation sequencing approaches, such as whole-exome sequencing and whole-genome sequencing, together with advanced bioinformatics filtering approaches, HM is again emerging as a powerful method for the identification of genes involved in disease etiology. In addition to its usefulness for research, HM is effective in clinical genetic services, increasing the efficiency of molecular diagnostics. For autosomal recessive Mendelian disorders with extensive genetic heterogeneity, HM can reduce both cost and turnaround time of mutation detection in the context of next-generation sequencing and can obviate expensive screening, such as biochemical testing in the setting of metabolic genodermatoses or antigen mapping for epidermolysis bullosa. It is therefore important for dermatology clinicians and researchers to understand the processes, principal uses, and advantages and limitations of HM when ordering or performing genetic tests for patients affected by heritable skin disorders.
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Affiliation(s)
- Hassan Vahidnezhad
- Department of Dermatology and Cutaneous Biology, Sidney Kimmel Medical College, Thomas Jefferson University, Philadelphia, Pennsylvania, USA; Biotechnology Research Center, Pasteur Institute of Iran, Tehran, Iran
| | - Leila Youssefian
- Department of Dermatology and Cutaneous Biology, Sidney Kimmel Medical College, Thomas Jefferson University, Philadelphia, Pennsylvania, USA; Department of Medical Genetics, Tehran University of Medical Sciences, Tehran, Iran; Genetics, Genomics and Cancer Biology PhD Program, Thomas Jefferson University, Philadelphia, PA, USA
| | - Ali Jazayeri
- Department of Information Science, College of Computing and Informatics, Drexel University Philadelphia, Pennsylvania, USA
| | - Jouni Uitto
- Department of Dermatology and Cutaneous Biology, Sidney Kimmel Medical College, Thomas Jefferson University, Philadelphia, Pennsylvania, USA.
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5
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Vahidnezhad H, Youssefian L, Saeidian AH, Zeinali S, Touati A, Abiri M, Sotoudeh S, Norouz-Zadeh S, Amirinezhad N, Mozafari N, Daneshpazhooh M, Mahmoudi H, Hamid M, Bradfield JP, Kim CE, Hakonarson H, Uitto J. Genome-wide single nucleotide polymorphism-based autozygosity mapping facilitates identification of mutations in consanguineous families with epidermolysis bullosa. Exp Dermatol 2018; 28:1118-1121. [PMID: 29364557 DOI: 10.1111/exd.13501] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 01/11/2018] [Indexed: 12/28/2022]
Abstract
Autozygosity mapping (AM) is a technique utilised for mapping homozygous autosomal recessive (AR) traits and facilitation of genetic diagnosis. We investigated the utility of AM for the molecular diagnosis of heterogeneous AR disorders, using epidermolysis bullosa (EB) as a paradigm. We applied this technique to a cohort of 46 distinct EB families using both short tandem repeat (STR) and genome-wide single nucleotide polymorphism (SNP) array-based AM to guide targeted Sanger sequencing of EB candidate genes. Initially, 39 of the 46 cases were diagnosed with homozygous mutations using this method. Independently, 26 cases, including the seven initially unresolved cases, were analysed with an EB-targeted next-generation sequencing (NGS) panel. NGS identified mutations in five additional cases, initially undiagnosed due to the presence of compound heterozygosity, deep intronic mutations or runs of homozygosity below the set threshold of 2 Mb, for a total yield of 44 of 46 cases (95.7%) diagnosed genetically.
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Affiliation(s)
- Hassan Vahidnezhad
- Department of Dermatology and Cutaneous Biology, Sidney Kimmel Medical College, Thomas Jefferson University, Philadelphia, PA, USA.,Biotechnology Research Center, Department of Molecular Medicine, Pasteur Institute of Iran, Tehran, Iran
| | - Leila Youssefian
- Department of Dermatology and Cutaneous Biology, Sidney Kimmel Medical College, Thomas Jefferson University, Philadelphia, PA, USA.,Department of Medical Genetics, Tehran University of Medical Sciences, Tehran, Iran
| | - Amir Hossein Saeidian
- Department of Dermatology and Cutaneous Biology, Sidney Kimmel Medical College, Thomas Jefferson University, Philadelphia, PA, USA
| | - Sirous Zeinali
- Biotechnology Research Center, Department of Molecular Medicine, Pasteur Institute of Iran, Tehran, Iran.,Kawsar Human Genetics Research Center, Tehran, Iran
| | - Andrew Touati
- Department of Dermatology and Cutaneous Biology, Sidney Kimmel Medical College, Thomas Jefferson University, Philadelphia, PA, USA.,Drexel University College of Medicine, Philadelphia, PA, USA
| | - Maryam Abiri
- Kawsar Human Genetics Research Center, Tehran, Iran.,Department of Medical Genetics and Molecular Biology, School of Medicine, Iran University of Medical Sciences, Tehran, Iran
| | - Soheila Sotoudeh
- Department of Dermatology, Children's Medical Center, Center of Excellence, Tehran University of Medical Sciences, Tehran, Iran
| | - Sara Norouz-Zadeh
- Kawsar Human Genetics Research Center, Tehran, Iran.,Department of Biology, Islamic Azad University, Arsanjan Branch, Arsanjan, Iran
| | - Niloufar Amirinezhad
- Kawsar Human Genetics Research Center, Tehran, Iran.,Department of Biology, Islamic Azad University, Arsanjan Branch, Arsanjan, Iran
| | - Nikoo Mozafari
- Skin Research Center, Shahid Beheshti University of Medical Sciences, Tehran, Iran
| | - Maryam Daneshpazhooh
- Department of Dermatology, Razi Hospital, Tehran University of Medical Sciences, Tehran, Iran
| | - Hamidreza Mahmoudi
- Department of Dermatology, Razi Hospital, Tehran University of Medical Sciences, Tehran, Iran
| | - Mohammad Hamid
- Biotechnology Research Center, Department of Molecular Medicine, Pasteur Institute of Iran, Tehran, Iran
| | - Jonathan P Bradfield
- Center for Applied Genomics, Abramson Pediatric Research Center, The Children's Hospital of Philadelphia, Philadelphia, PA, USA
| | - Cecilia E Kim
- Center for Applied Genomics, Abramson Pediatric Research Center, The Children's Hospital of Philadelphia, Philadelphia, PA, USA
| | - Hakon Hakonarson
- Center for Applied Genomics, Abramson Pediatric Research Center, The Children's Hospital of Philadelphia, Philadelphia, PA, USA.,Department of Pediatrics, Perelman School of Medicine, University of Pennsylvania, Philadelphia, PA, USA
| | - Jouni Uitto
- Department of Dermatology and Cutaneous Biology, Sidney Kimmel Medical College, Thomas Jefferson University, Philadelphia, PA, USA
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6
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Bastaki F, Mohamed M, Nair P, Saif F, Mustafa EM, Bizzari S, Al-Ali MT, Hamzeh AR. Summary of mutations underlying autosomal recessive congenital ichthyoses (ARCI) in Arabs with four novel mutations in ARCI-related genes from the United Arab Emirates. Int J Dermatol 2017; 56:514-523. [PMID: 28236338 DOI: 10.1111/ijd.13568] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/11/2016] [Revised: 11/24/2016] [Accepted: 01/10/2017] [Indexed: 11/29/2022]
Abstract
BACKGROUND Clinical and molecular heterogeneity is a prominent characteristic of congenital ichthyoses, with the involvement of numerous causative loci. Mutations in these loci feature in autosomal recessive congenital ichthyoses (ARCIs) quite variably, with certain genes/mutations being more frequently uncovered in particular populations. METHODS In this study, we used whole exome sequencing as well as direct Sanger sequencing to uncover four novel mutations in ARCI-related genes, which were found in families from the United Arab Emirates. In silico tools such as CADD and SIFT Indel were used to predict the functional consequences of these mutations. RESULTS The here-presented mutations occurred in three genes (ALOX12B, TGM1, ABCA12), and these are a mixture of missense and indel variants with damaging functional consequences on their encoded proteins. CONCLUSIONS This study presents an overview of the mutations that were found in ARCI-related genes in Arabs and discusses molecular and clinical details pertaining to the above-mentioned Emirati cases and their novel mutations with special emphasis on the resulting protein changes.
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Affiliation(s)
- Fatma Bastaki
- Pediatric Department, Latifa Hospital, Dubai Health Authority, Dubai, UAE
| | - Madiha Mohamed
- Pediatric Department, Latifa Hospital, Dubai Health Authority, Dubai, UAE
| | | | - Fatima Saif
- Pediatric Department, Latifa Hospital, Dubai Health Authority, Dubai, UAE
| | - Ethar M Mustafa
- Pediatric Department, Latifa Hospital, Dubai Health Authority, Dubai, UAE
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7
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Khordadpoor-Deilamani F, Akbari MT, Karimipoor M, Javadi GR. Homozygosity mapping in albinism patients using a novel panel of 13 STR markers inside the nonsyndromic OCA genes: introducing 5 novel mutations. J Hum Genet 2016; 61:373-9. [DOI: 10.1038/jhg.2015.167] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/08/2015] [Revised: 11/16/2015] [Accepted: 11/26/2015] [Indexed: 02/06/2023]
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8
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Mashiah J, Harel A, Bitterman O, Sagi L, Gat A, Fellig Y, Ben-Shachar S, Sprecher E. Isotretinoin treatment of autosomal recessive congenital ichthyosis complicated by coexisting dysferlinopathy. Clin Exp Dermatol 2015; 41:390-3. [PMID: 26620441 DOI: 10.1111/ced.12774] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 04/18/2015] [Indexed: 11/25/2022]
Abstract
Consanguinity is known to be associated with an increase in the prevalence of autosomal recessive disorders such as autosomal recessive congenital ichthyosis (ARCI). ARCI often responds well to retinoid treatment. We describe a patient with ARCI who improved under isotretinoin treatment. The patient subsequently developed elevated levels of serum creatinine phosphokinase (CPK), which led to the diagnosis of a second autosomal recessive disorder, dysferlinopathy, a rare myopathy characterized by muscle weakness, decreased tendon reflexes and marked elevation of CPK levels. This report demonstrates the need for physicians to remain alert to the possible coexistence of rare and mutually relevant disorders in populations with a high rate of consanguinity.
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Affiliation(s)
- J Mashiah
- Department of Dermatology, Dana Children's Hospital, Tel Aviv Sourasky Medical Center, Tel Aviv, Israel.,Pediatric Dermatology Unit, Dana Children's Hospital, Tel Aviv Sourasky Medical Center, Tel Aviv, Israel
| | - A Harel
- Pediatric Dermatology Unit, Dana Children's Hospital, Tel Aviv Sourasky Medical Center, Tel Aviv, Israel
| | - O Bitterman
- Dermatology Clinic, Nahariya Western Galilee Hospital, Nahariya, Israel
| | - L Sagi
- Pediatric Neurology Unit, Dana Children's Hospital, Tel Aviv, Israel.,Sackler Faculty of Medicine, Tel Aviv University, Tel Aviv, Israel
| | - A Gat
- Sackler Faculty of Medicine, Tel Aviv University, Tel Aviv, Israel.,Department of Pathology, Tel Aviv Sourasky Medical Center, Tel Aviv, Israel
| | - Y Fellig
- Department of Pathology, Hadassah-Hebrew University Medical Center, Jerusalem, Israel
| | - S Ben-Shachar
- Genetic Institute, Tel Aviv Sourasky Medical Center, Tel Aviv, Israel
| | - E Sprecher
- Department of Dermatology, Dana Children's Hospital, Tel Aviv Sourasky Medical Center, Tel Aviv, Israel.,Pediatric Dermatology Unit, Dana Children's Hospital, Tel Aviv Sourasky Medical Center, Tel Aviv, Israel.,Sackler Faculty of Medicine, Tel Aviv University, Tel Aviv, Israel
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9
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Clinico-pathological manifestations of variant late infantile neuronal ceroid lipofuscinosis (vLINCL) caused by a novel mutation in MFSD8 gene. Eur J Med Genet 2014; 57:607-12. [PMID: 25270050 DOI: 10.1016/j.ejmg.2014.09.004] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/02/2014] [Accepted: 09/15/2014] [Indexed: 11/21/2022]
Abstract
Neuronal ceroid lipofuscinosis (NCL) refers to a growing heterogeneous group of neurodegenerative disorders characterized by lysosomal accumulation of abnormal autofluorescent material. NCLs are traditionally classified clinically according to their age of onset. Variable late infantile NCL (vLINCL) is the most genetically heterogeneous subtype as it has been shown to be caused by mutations in at least six genes. We report on 5 patients of a consanguineous family who presented in early childhood with intractable seizures, severe cognitive and motor decline, behavioral impairment and progressive retinal degeneration. Disease course was severe; all patients were in a vegetative state by the second decade of life, and eventually die prematurely (except in one case). Ultrastructural studies of brain and rectal mucosa disclosed accumulation of storage material in various patterns including fingerprint, curvilinear, and granular osmiophilic deposits consistent with the diagnosis of NCL. Brain pathologic features from a living patient are first reported here and shed light on disease progression and pathogenesis. Using a combination of whole genome autozygosity mapping and candidate gene direct sequencing, we identified a mutation in MFSD8, c.472G>A (p.Gly158Ser), which was found to segregate with the disease phenotype in the family. This study underscores the importance of a combined clinic-molecular workup in NCLs and other neurodegenerative conditions.
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10
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Goldsmith T, Fuchs-Telem D, Israeli S, Sarig O, Padalon-Brauch G, Bergman R, Indelman M, Sprecher E, Nousbeck J. The sound of silence: autosomal recessive congenital ichthyosis caused by a synonymous mutation in ABCA12. Exp Dermatol 2013; 22:251-4. [PMID: 23528209 DOI: 10.1111/exd.12110] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 02/07/2013] [Indexed: 12/19/2022]
Abstract
Autosomal recessive congenital ichthyosis refers to a heterogeneous group of cornification disorders of major impact on patients' life. The disease has been linked so far to mutations in 8 distinct genes. We report a consanguineous family of Arab Muslim origin with several members displaying a severe form of congenital ichthyosiform erythroderma. Using a panel of polymorphic microsatellite markers, we identified a region of homozygosity shared by all patients on 2q34, in a region harbouring the ABCA12 gene. Direct sequencing of genomic DNA derived from a patient failed to reveal any obviously pathogenic change in the coding sequence of this gene. In contrast, cDNA sequence analysis revealed the existence of a 163-bp-long deletion in exon 24, thus pointing to a splicing defect. Careful reanalysis of the genomic DNA sequence revealed apart from several known single-nucleotide polymorphisms, a hitherto unreported homozygous synonymous mutation in exon 24 (c.3456G>A; p.S1152S), which was found to lead to the formation of a novel splicing acceptor site. Synonymous mutations have been shown to uncommonly cause inherited disorders in humans. Here, we present the first example of a congenital form of ichthyosis resulting from such a genetic defect.
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Affiliation(s)
- Tomer Goldsmith
- Department of Dermatology, Tel Aviv Sourasky Medical Center, Tel Aviv, Israel
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11
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Israeli S, Goldberg I, Fuchs-Telem D, Bergman R, Indelman M, Bitterman-Deutsch O, Harel A, Mashiach Y, Sarig O, Sprecher E. Non-syndromic autosomal recessive congenital ichthyosis in the Israeli population. Clin Exp Dermatol 2013; 38:911-6. [PMID: 23621129 DOI: 10.1111/ced.12148] [Citation(s) in RCA: 29] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 01/03/2013] [Indexed: 01/14/2023]
Abstract
BACKGROUND Autosomal recessive congenital ichthyosis (ARCI) is the term given to a complex and heterogeneous group of cornification disorders associated with mutations in at least eight distinct genes. Mutation distribution and prevalence rates are instrumental for the design of diagnostic strategies in ARCI but have not yet been systematically explored in the Israeli population. Previous data suggest that the demographic features specific to Middle Eastern populations, such as a high frequency of consanguineous marriages, may have an effect on the molecular epidemiology of genodermatoses. METHODS We systematically assessed all families with ARCI presenting at our clinics over a period of 9 years, using a combination of homozygosity mapping, direct sequencing and PCR-restriction fragment length polymorphism assays. RESULTS In total, 20 families with ARCI were assessed, and causative mutations were identified in 7 genes: TGM1 (30% of patients), ALOX12B (20%), ABCA12 (5%), CYP4F22 (10%), ALOXE3 (10%), LIPN (5%) and NIPAL4 (5%) Two families (10%) had mutations mapped to an ARCI-associated locus on 12p11.2-q13, while no mutation was found for one additional kindred. In the subgroup of families of Arab Muslim origin, mutations were identified most frequently in ALOX12B and TGM1 (31%), whereas the other subgroups displayed a subtype distribution very similar to that previously reported in western populations. CONCLUSIONS The present data point to the need for population-tailored mutation screening strategies in genetically heterogeneous genodermatoses, based on the relative prevalence of the disease subsets.
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Affiliation(s)
- S Israeli
- Department of Dermatology, Tel Aviv Sourasky Medical Center, Tel Aviv, Israel; Department of Human Molecular Genetics and Biochemistry, Sackler Faculty of Medicine, Tel Aviv University, Ramat Aviv, Israel
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Al-Naamani A, Al-Waily A, Al-Kindi M, Al-Awadi M, Al-Yahyaee SA. Transglutaminase-1 mutations in Omani families with lamellar ichthyosis. Med Princ Pract 2013; 22:438-43. [PMID: 23689228 PMCID: PMC5586776 DOI: 10.1159/000349914] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/22/2012] [Accepted: 02/12/2013] [Indexed: 11/19/2022] Open
Abstract
OBJECTIVE To determine the molecular basis of familial ichthyosis in three Omani families. SUBJECTS AND METHODS Nine patients from three consanguineous families, A, B, and C, were born with typical features of lamellar ichthyosis subtype including collodion membrane and maintained ectropion, and epidermal scaling through their childhood. The 4 patients from family B had more severe symptoms requiring neonatal critical care and subsequent regular treatment with emollients, eye lubricants, and low-dose acitretin. DNA was extracted from peripheral blood by standard methods. The samples were initially genotyped to screen known loci linked to recessive ichthyosis on chromosomes 2q33-32 (ABCA12), 14q11 (TGM1), and 19p12-q12 using commercially supplied polymorphic fluorescent microsatellite markers. TGM1 was analyzed by direct sequencing for disease-associated mutations. RESULTS Two known pathogenic mutations in TGM1 were detected: p.Gly278Arg in families A and B and p.Arg396His in family C. These two mutations were segregating in an autosomal recessive mode of inheritance. CONCLUSION Two known pathogenic TGM1 mutations were detected in three large consanguineous Omani families with lamellar ichthyosis. This study confirmed the geographic distribution of known mutations to an apparently unrelated population.
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Affiliation(s)
- Aisha Al-Naamani
- Department of Genetics, Public Health Sultan Qaboos University, Al-Khoud, Oman
| | - Ahmed Al-Waily
- Department of Family and Public Health Sultan Qaboos University, Al-Khoud, Oman
| | - Mohammed Al-Kindi
- Department of Biochemistry, Public Health Sultan Qaboos University, Al-Khoud, Oman
| | - Maha Al-Awadi
- Department of Genetics, Public Health Sultan Qaboos University, Al-Khoud, Oman
| | - Said Ali Al-Yahyaee
- Department of Genetics, Public Health Sultan Qaboos University, Al-Khoud, Oman
- *Said Ali Al-Yahyaee, Department of Genetics, College of Medicine and Health Sciences, Sultan Qaboos University, PO Box 35, Al-Khoud 123 (Oman), E-Mail
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Schaffer JV. Molecular Diagnostics in Genodermatoses. ACTA ACUST UNITED AC 2012; 31:211-20. [DOI: 10.1016/j.sder.2012.08.002] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/10/2012] [Accepted: 08/14/2012] [Indexed: 10/27/2022]
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Israeli S, Khamaysi Z, Fuchs-Telem D, Nousbeck J, Bergman R, Sarig O, Sprecher E. A mutation in LIPN, encoding epidermal lipase N, causes a late-onset form of autosomal-recessive congenital ichthyosis. Am J Hum Genet 2011; 88:482-7. [PMID: 21439540 DOI: 10.1016/j.ajhg.2011.02.011] [Citation(s) in RCA: 40] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/09/2011] [Revised: 02/19/2011] [Accepted: 02/23/2011] [Indexed: 10/18/2022] Open
Abstract
Autosomal-recessive congenital ichthyoses represent a large and heterogeneous group of disorders of epidermal cornification. Recent data suggest that most of these disorders might result from defective lipid transport and metabolism. In the present study, we describe a late-onset form of recessive ichthyosis in a large consanguineous pedigree. By using a combination of homozygosity mapping and positional candidate-gene screening, we identified a 2 bp deletion in LIPN that segregated with the disease phenotype throughout the family. LIPN encodes one of six acid lipases known to be involved in triglyceride metabolism in mammals . LIPN was found to be exclusively expressed in the epidermis and to be strongly induced during keratinocyte differentiation.
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Nahum S, Morice-Picard F, Taieb A, Sprecher E. A novel mutation in LPAR6 causes autosomal recessive hypotrichosis of the scalp. Clin Exp Dermatol 2010; 36:188-94. [PMID: 21070332 DOI: 10.1111/j.1365-2230.2010.03944.x] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Abstract
BACKGROUND Autosomal recessive hypotrichosis simplex (ARHS) presents with progressive hair loss mainly affecting the scalp area. In a small number of families, the condition has been associated with mutations in three distinct genes: DSG4, LIPH and LPAR6. AIM To identify the molecular basis of ARHS in a consanguineous family of Turkish extraction. METHODS We used a combination of microsatellite marker screening and direct sequencing. RESULTS We identified a novel missense mutation (c.C587T) in the human LPAR6 gene, resulting in the amino acid substitution p.P196L. The mutation affects a highly conserved amino acid residue, and is predicted to disrupt signalling through the P2Y5 receptor. CONCLUSIONS This study provides further evidence supporting a role for the lysophosphatidyl signalling pathway in hair growth and differentiation. In addition, this paper reports, for the first time to our knowledge, the use of homozygosity mapping as a premutation screening tool in the diagnosis of a group of inherited hair disorders.
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Affiliation(s)
- S Nahum
- Center for Translational Genetics, Rappaport Institute for Research in the Medical Sciences, Bruce Rappaport Faculty of Medicine, Technion - Israel Institute of Technology, Haifa, Israel
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Revised nomenclature and classification of inherited ichthyoses: results of the First Ichthyosis Consensus Conference in Sorèze 2009. J Am Acad Dermatol 2010; 63:607-41. [PMID: 20643494 DOI: 10.1016/j.jaad.2009.11.020] [Citation(s) in RCA: 454] [Impact Index Per Article: 32.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/31/2009] [Revised: 10/30/2009] [Accepted: 11/17/2009] [Indexed: 12/21/2022]
Abstract
BACKGROUND Inherited ichthyoses belong to a large, clinically and etiologically heterogeneous group of mendelian disorders of cornification, typically involving the entire integument. Over the recent years, much progress has been made defining their molecular causes. However, there is no internationally accepted classification and terminology. OBJECTIVE We sought to establish a consensus for the nomenclature and classification of inherited ichthyoses. METHODS The classification project started at the First World Conference on Ichthyosis in 2007. A large international network of expert clinicians, skin pathologists, and geneticists entertained an interactive dialogue over 2 years, eventually leading to the First Ichthyosis Consensus Conference held in Sorèze, France, on January 23 and 24, 2009, where subcommittees on different issues proposed terminology that was debated until consensus was reached. RESULTS It was agreed that currently the nosology should remain clinically based. "Syndromic" versus "nonsyndromic" forms provide a useful major subdivision. Several clinical terms and controversial disease names have been redefined: eg, the group caused by keratin mutations is referred to by the umbrella term, "keratinopathic ichthyosis"-under which are included epidermolytic ichthyosis, superficial epidermolytic ichthyosis, and ichthyosis Curth-Macklin. "Autosomal recessive congenital ichthyosis" is proposed as an umbrella term for the harlequin ichthyosis, lamellar ichthyosis, and the congenital ichthyosiform erythroderma group. LIMITATIONS As more becomes known about these diseases in the future, modifications will be needed. CONCLUSION We have achieved an international consensus for the classification of inherited ichthyosis that should be useful for all clinicians and can serve as reference point for future research.
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Abstract
The Israeli population is characterized by unique demographic features including high genetic homogeneity within many closed communities. As a consequence the molecular epidemiology of epidermolysis bullosa differs markedly in this country and surrounding areas from that reported in the Western world.
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Affiliation(s)
- Eli Sprecher
- Department of Dermatology, Tel Aviv Sourasky Medical Center, Tel Aviv, Israel.
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Laakso M, Karinen S, Lehtonen R, Hautaniemi S. Computational identification of cancer susceptibility loci. Methods Mol Biol 2010; 653:87-103. [PMID: 20721739 DOI: 10.1007/978-1-60761-759-4_6] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/29/2023]
Abstract
The identification of novel cancer susceptibility syndromes and genes from very limited numbers of study individuals has become feasible through the use of high-throughput genotype microarrays. With such an approach, highly sensitive genome-wide computational methods are needed to identify the regions of interest. We have developed novel methods to identify and compare homozygous and compound heterozygous regions between cases and controls, to facilitate the identification of recessively inherited cancer susceptibility loci. As our approach is optimized for sensitivity, it creates many hits that may be unrelated to the phenotype of interest. We compensate for this compromised specificity by the automated use of additional sources of biological information along with a ranking function to focus on the most relevant regions. The methods are demonstrated here by comparing colorectal cancer patients to controls.
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Affiliation(s)
- Marko Laakso
- Computational Systems Biology Laboratory, Institute of Biomedicine and Genome-Scale Biology Research Program, University of Helsinki, Helsinki, Finland
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Herman ML, Farasat S, Steinbach PJ, Wei MH, Toure O, Fleckman P, Blake P, Bale SJ, Toro JR. Transglutaminase-1 gene mutations in autosomal recessive congenital ichthyosis: summary of mutations (including 23 novel) and modeling of TGase-1. Hum Mutat 2009; 30:537-47. [PMID: 19241467 PMCID: PMC3243309 DOI: 10.1002/humu.20952] [Citation(s) in RCA: 64] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Abstract
Autosomal recessive congenital ichthyosis (ARCI) is a heterogeneous group of rare cornification diseases. Germline mutations in TGM1 are the most common cause of ARCI in the United States. TGM1 encodes for the TGase-1 enzyme that functions in the formation of the cornified cell envelope. Structurally defective or attenuated cornified cell envelop have been shown in epidermal scales and appendages of ARCI patients with TGM1 mutations. We review the clinical manifestations as well as the molecular genetics of ARCI. In addition, we characterized 115 TGM1 mutations reported in 234 patients from diverse racial and ethnic backgrounds (Caucasion Americans, Norwegians, Swedish, Finnish, German, Swiss, French, Italian, Dutch, Portuguese, Hispanics, Iranian, Tunisian, Moroccan, Egyptian, Afghani, Hungarian, African Americans, Korean, Japanese and South African). We report 23 novel mutations: 71 (62%) missense; 20 (17%) nonsense; 9 (8%) deletion; 8 (7%) splice-site, and 7 (6%) insertion. The c.877-2A>G was the most commonly reported TGM1 mutation accounting for 34% (147 of 435) of all TGM1 mutant alleles reported to date. It had been shown that this mutation is common among North American and Norwegian patients due to a founder effect. Thirty-one percent (36 of 115) of all mutations and 41% (29 of 71) of missense mutations occurred in arginine residues in TGase-1. Forty-nine percent (35 of 71) of missense mutations were within CpG dinucleotides, and 74% (26/35) of these mutations were C>T or G>A transitions. We constructed a model of human TGase-1 and showed that all mutated arginines that reside in the two beta-barrel domains and two (R142 and R143) in the beta-sandwich are located at domain interfaces. In conclusion, this study expands the TGM1 mutation spectrum and summarizes the current knowledge of TGM1 mutations. The high frequency of mutated arginine codons in TGM1 may be due to the deamination of 5' methylated CpG dinucleotides.
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Affiliation(s)
- Matthew L. Herman
- Division of Cancer Epidemiology and Genetics, National Cancer Institute, NIH, Rockville, MD 20892, USA
| | - Sharifeh Farasat
- Division of Cancer Epidemiology and Genetics, National Cancer Institute, NIH, Rockville, MD 20892, USA
| | - Peter J. Steinbach
- Center for Molecular Modeling, Division of Computational Bioscience, Center for Information Technology, NIH, Bethesda, MD, 20892, USA
| | - Ming-Hui Wei
- Division of Cancer Epidemiology and Genetics, National Cancer Institute, NIH, Rockville, MD 20892, USA
- Basic Research Program, SAIC-Frederick Inc., Frederick, MD 21702, USA
| | - Ousmane Toure
- Division of Cancer Epidemiology and Genetics, National Cancer Institute, NIH, Rockville, MD 20892, USA
| | - Philip Fleckman
- Division of Dermatology, Department of Medicine, University of Washington, Seattle, WA, 98195, USA
| | - Patrick Blake
- Division of Cancer Epidemiology and Genetics, National Cancer Institute, NIH, Rockville, MD 20892, USA
- Howard Hughes Medical Institute, Chevy Chase, MD
| | | | - Jorge R. Toro
- Division of Cancer Epidemiology and Genetics, National Cancer Institute, NIH, Rockville, MD 20892, USA
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Farasat S, Wei MH, Herman M, Liewehr DJ, Steinberg SM, Bale SJ, Fleckman P, Toro JR. Novel transglutaminase-1 mutations and genotype-phenotype investigations of 104 patients with autosomal recessive congenital ichthyosis in the USA. J Med Genet 2008; 46:103-11. [PMID: 18948357 DOI: 10.1136/jmg.2008.060905] [Citation(s) in RCA: 62] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/04/2022]
Abstract
BACKGROUND Autosomal recessive congenital ichthyosis (ARCI) is a rare hereditary disorder of cornification. Mutations in the transglutaminase-1 (TGM1) gene, which encodes for the epidermal enzyme transglutaminase-1 (TGase-1), are one of the causes of ARCI. METHODS The TGM1 mutation spectrum was characterised and genotype-phenotype correlations investigated in 104 patients with ARCI ascertained through the National Registry for Ichthyosis and Related Disorders in the USA. Methods: Germline mutations in TGM1 were identified in 55% (57/104) of patients with ARCI. Arginine residues in TGase-1 were mutated in 39% (22/57) of patients overall and 54% (20/37) of those with missense mutations. In total, 55% (12/22) of missense mutations were within CpG dinucleotides and 92% (11/12) of these mutations were C-->T or G-->A transitions. The genotype-phenotype investigation found that ARCI with TGM1 mutations was significantly associated with presence of collodion membrane at birth (p = 0.006), ectropion (p = 0.001), plate-like scales (p = 0.005) and alopecia (p = 0.001). Patients who had at least one mutation predicted to truncate TGase-1 were more likely to have more severe hypohidrosis (p = 0.001) and overheating (p = 0.0007) at onset of symptoms than were those with exclusively TGM1 missense mutations. A logistic model was developed, which predicted that individuals with collodion membrane, alopecia and/or eye problems are about four times more likely to have TGM1 mutations than patients without these findings. CONCLUSION This is the largest investigation of patients with ARCI to date. It expands the TGM1 mutation spectrum and confirms that despite genetic and phenotypic heterogeneity in ARCI, TGM1 is the main causative gene for this disorder. The high frequency of mutated arginine codons in TGM1 may be due to the deamination of CpG dinucleotides.
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Affiliation(s)
- S Farasat
- Division of Cancer Epidemiology and Genetics, National Cancer Institute, National Institutes of Health, 6120 Executive Boulevard, Rockville, MD 20892-4562, USA
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Ouragini H, Cherif F, Daoud W, Kassar S, Charfeddine C, Rebaï A, Boubaker S, Ben Osman-Dhahri A, Abdelhak S. Haplotypic classification of dystrophic epidermolysis bullosa in Tunisian consanguineous families: implication for diagnosis. Arch Dermatol Res 2008; 300:365-70. [DOI: 10.1007/s00403-008-0861-2] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/30/2007] [Revised: 03/05/2008] [Accepted: 04/29/2008] [Indexed: 10/22/2022]
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Lugassy J, Hennies HC, Indelman M, Khamaysi Z, Bergman R, Sprecher E. Rapid detection of homozygous mutations in congenital recessive ichthyosis. Arch Dermatol Res 2007; 300:81-5. [DOI: 10.1007/s00403-007-0815-0] [Citation(s) in RCA: 26] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/30/2007] [Revised: 10/24/2007] [Accepted: 10/29/2007] [Indexed: 01/11/2023]
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Sprecher E. Tumoral calcinosis: new insights for the rheumatologist into a familial crystal deposition disease. Curr Rheumatol Rep 2007; 9:237-42. [PMID: 17531178 DOI: 10.1007/s11926-007-0038-6] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Abstract
A growing body of evidence points to extraosseous calcification (calcification occurring in nonosseous tissues) as a major cause of morbidity and mortality in humans. The term familial tumoral calcinosis encompasses a number of rare recessive diseases, often associated with increased reabsorption of phosphate through the renal proximal tubule, which manifests with periarticular or acral calcium deposition. Recently, the molecular pathogenesis of this group of disorders has been elucidated, leading to the identification of several proteins playing pivotal roles in the regulation of extraosseous calcification. This report reviews these advances as well as the potential implications of these discoveries for the management of acquired conditions associated with abnormal calcification.
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Affiliation(s)
- Eli Sprecher
- Laboratory of Molecular Dermatology, Department of Dermatology, Rambam Health Care Campus, Faculty of Medicine and Rappaport Institute for Research in the Medical Sciences, Technion, Israel.
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