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Hotz A, Fölster-Holst R, Oji V, Bourrat E, Frank J, Marrakchi S, Ennouri M, Wankner L, Komlosi K, Alter S, Fischer J. Erythrokeratodermia Variabilis-like Phenotype in Patients Carrying ABCA12 Mutations. Genes (Basel) 2024; 15:288. [PMID: 38540347 PMCID: PMC10970099 DOI: 10.3390/genes15030288] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/19/2024] [Revised: 02/20/2024] [Accepted: 02/22/2024] [Indexed: 06/14/2024] Open
Abstract
Erythrokeratodermia variabilis (EKV) is a rare genodermatosis characterized by well-demarcated erythematous patches and hyperkeratotic plaques. EKV is most often transmitted in an autosomal dominant manner. Until recently, only mutations in connexins such as GJB3 (connexin 31), GJB4 (connexin 30.3), and occasionally GJA1 (connexin 43) were known to cause EKV. In recent years, mutations in other genes have been described as rare causes of EKV, including the genes KDSR, KRT83, and TRPM4. Features of the EKV phenotype can also appear with other genodermatoses: for example, in Netherton syndrome, which hampers correct diagnosis. However, in autosomal recessive congenital ichthyosis (ARCI), an EKV phenotype has rarely been described. Here, we report on seven patients who clinically show a clear EKV phenotype, but in whom molecular genetic analysis revealed biallelic mutations in ABCA12, which is why the patients are classified in the ARCI group. Our study indicates that ARCI should be considered as a differential diagnosis in EKV.
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Affiliation(s)
- Alrun Hotz
- European Reference Networks (ERN Skin), 75015 Paris, France; (A.H.); (V.O.); (K.K.); (S.A.)
- Center for Cornification Disorders, Freiburg Center for Rare Diseases, Medical Center, University of Freiburg, 79106 Freiburg, Germany
- Institute of Human Genetics, Medical Center—University of Freiburg, Faculty of Medicine, University of Freiburg, 79106 Freiburg, Germany
| | - Regina Fölster-Holst
- Department of Dermatology, Venerology and Allergology, University Medical Center Schleswig-Holstein, 24105 Kiel, Germany;
| | - Vinzenz Oji
- European Reference Networks (ERN Skin), 75015 Paris, France; (A.H.); (V.O.); (K.K.); (S.A.)
- Department of Dermatology and Venereology, Muenster University Medical Center, 48149 Muenster, Germany
| | - Emmanuelle Bourrat
- Department of Dermatology, Reference Center for Rare Skin Diseases MAGEC, Saint Louis Hospital AP-HP, 75015 Paris, France;
| | - Jorge Frank
- Department of Dermatology, Venereology and Allergology, University Medical Center Göttingen, 37075 Göttingen, Germany;
| | - Slaheddine Marrakchi
- Department of Dermatology, CHU Hedi Chaker, Sfax University, Sfax 3029, Tunisia;
| | - Mariem Ennouri
- Laboratory of Molecular and Functional Genetics, Faculty of Sciences of Sfax, Sfax University, Sfax 3029, Tunisia;
| | - Lotta Wankner
- European Reference Networks (ERN Skin), 75015 Paris, France; (A.H.); (V.O.); (K.K.); (S.A.)
- Center for Cornification Disorders, Freiburg Center for Rare Diseases, Medical Center, University of Freiburg, 79106 Freiburg, Germany
- Institute of Human Genetics, Medical Center—University of Freiburg, Faculty of Medicine, University of Freiburg, 79106 Freiburg, Germany
| | - Katalin Komlosi
- European Reference Networks (ERN Skin), 75015 Paris, France; (A.H.); (V.O.); (K.K.); (S.A.)
- Center for Cornification Disorders, Freiburg Center for Rare Diseases, Medical Center, University of Freiburg, 79106 Freiburg, Germany
- Institute of Human Genetics, Medical Center—University of Freiburg, Faculty of Medicine, University of Freiburg, 79106 Freiburg, Germany
| | - Svenja Alter
- European Reference Networks (ERN Skin), 75015 Paris, France; (A.H.); (V.O.); (K.K.); (S.A.)
- Center for Cornification Disorders, Freiburg Center for Rare Diseases, Medical Center, University of Freiburg, 79106 Freiburg, Germany
- Institute of Human Genetics, Medical Center—University of Freiburg, Faculty of Medicine, University of Freiburg, 79106 Freiburg, Germany
| | - Judith Fischer
- European Reference Networks (ERN Skin), 75015 Paris, France; (A.H.); (V.O.); (K.K.); (S.A.)
- Center for Cornification Disorders, Freiburg Center for Rare Diseases, Medical Center, University of Freiburg, 79106 Freiburg, Germany
- Institute of Human Genetics, Medical Center—University of Freiburg, Faculty of Medicine, University of Freiburg, 79106 Freiburg, Germany
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2
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Zhu S, Jiang Y, Shen N, Yin H, Qiao J. Case report of self-improving collodion ichthyosis in the newborn. J Int Med Res 2023; 51:3000605231204491. [PMID: 37848341 PMCID: PMC10585991 DOI: 10.1177/03000605231204491] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/28/2023] [Accepted: 09/13/2023] [Indexed: 10/19/2023] Open
Abstract
Self-improving collodion ichthyosis (SICI) is a relatively rare subtype of autosomal recessive congenital ichthyosis (ARCI) that is often characterized by a collodion baby (CB) phenotype at birth. A newborn girl, just 1 hour old, presented with taut, shiny, thick yellow crusts, like parchment, and scales on her trunk and upper limbs. The tightening effect had caused both upper eyelids to appear everted, and her lips and auricles were deformed. Based on whole-exome sequencing and examination of the clinical phenotype, the patient was diagnosed with ARCI. After admission, the exposed mucosa was covered with a sterile Vaseline gauze dressing, and she was placed in an incubator set to a temperature of 32°C with a humidity level of 75%. One week later, the parchment-like scales had begun to flake off, and at the age of 3 weeks, all bodily skin appeared normal. SICI was diagnosed. After discharge, the patient was followed up to 3 months of age, at which time her growth and development were comparable to those of her peers. Clinicians should consider SICI as a possible diagnosis when analyzing the prognosis of patients with CB. Reducing water loss and maintaining the electrolyte balance are particularly important for SICI treatment.
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Affiliation(s)
- Suyue Zhu
- Department of Pediatrics, Suqian Hospital Affiliated to Xuzhou Medical University, Suqian, Jiangsu, China
| | - Yazhou Jiang
- Department of Pediatrics, Suqian Hospital Affiliated to Xuzhou Medical University, Suqian, Jiangsu, China
| | - Nan Shen
- Department of Pediatrics, Suqian Hospital Affiliated to Xuzhou Medical University, Suqian, Jiangsu, China
| | - Hanjun Yin
- Department of Pediatrics, Suqian Hospital Affiliated to Xuzhou Medical University, Suqian, Jiangsu, China
| | - Jibing Qiao
- Department of Pediatrics, Suqian Hospital Affiliated to Xuzhou Medical University, Suqian, Jiangsu, China
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3
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Zhang L, Hu Y, Lu J, Zhao P, Zhang X, Tan L, Li J, Xiao C, Zeng L, He X. Identification of the first congenital ichthyosis case caused by a homozygous deletion in the ALOX12B gene due to chromosome 17 mixed uniparental disomy. Front Genet 2022; 13:931833. [PMID: 36003334 PMCID: PMC9393266 DOI: 10.3389/fgene.2022.931833] [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: 04/29/2022] [Accepted: 06/27/2022] [Indexed: 11/18/2022] Open
Abstract
Uniparental disomy (UPD) is a rare genetic event caused by errors during gametogenesis and fertilization leading to two copies of a chromosome or chromosomal region inherited from one parent. MixUPD is one type of UPD that contains isodisomic and heterodisomic parts because of meiotic recombination. Using whole-exome sequencing (WES), we identified the first case of ichthyosis due to a maternal mixUPD on chromosome 17, which results in a homozygous deletion of partial intron 8 to exon 10 in ALOX12B, being predicted to lead to an internal protein deletion of 97 amino acids. We also performed a retrospective analysis of 198 patients with ALOX12B mutations. The results suggested that the exon 9 and 10 are located in the mutational hotspots of ALOX12B. In addition, our patient has microtia and congenital stenosis of the external auditory canals, which is very rare in patients with ALOX12B mutations. Our study reports the first case of autosomal recessive congenital ichthyosis (ARCI) due to a mixUPD of chromosome 17 and expands the spectrum of clinical manifestations of ARCI caused by mutations in the ALOX12B gene.
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Affiliation(s)
- Lei Zhang
- Precision Medical Center, Wuhan Children’s Hospital (Wuhan Maternal and Child Healthcare Hospital), Tongji Medical College, Huazhong University of Science & Technology, Wuhan, China
| | - Yanqiu Hu
- Precision Medical Center, Wuhan Children’s Hospital (Wuhan Maternal and Child Healthcare Hospital), Tongji Medical College, Huazhong University of Science & Technology, Wuhan, China
| | - Jingjing Lu
- Dermatology Department, Wuhan Children’s Hospital (Wuhan Maternal and Child Healthcare Hospital), Tongji Medical College, Huazhong University of Science & Technology, Wuhan, China
| | - Peiwei Zhao
- Precision Medical Center, Wuhan Children’s Hospital (Wuhan Maternal and Child Healthcare Hospital), Tongji Medical College, Huazhong University of Science & Technology, Wuhan, China
| | - Xiankai Zhang
- Precision Medical Center, Wuhan Children’s Hospital (Wuhan Maternal and Child Healthcare Hospital), Tongji Medical College, Huazhong University of Science & Technology, Wuhan, China
| | - Li Tan
- Precision Medical Center, Wuhan Children’s Hospital (Wuhan Maternal and Child Healthcare Hospital), Tongji Medical College, Huazhong University of Science & Technology, Wuhan, China
| | - Jun Li
- Otolaryngology Department, Wuhan Children’s Hospital (Wuhan Maternal and Child Healthcare Hospital), Tongji Medical College, Huazhong University of Science & Technology, Wuhan, China
| | - Cuiping Xiao
- Precision Medical Center, Wuhan Children’s Hospital (Wuhan Maternal and Child Healthcare Hospital), Tongji Medical College, Huazhong University of Science & Technology, Wuhan, China
- *Correspondence: Xuelian He, ; Cuiping Xiao, ; Linkong Zeng,
| | - Linkong Zeng
- Neonatology Department, Wuhan Children’s Hospital (Wuhan Maternal and Child Healthcare Hospital), Tongji Medical College, Huazhong University of Science & Technology, Wuhan, China
- *Correspondence: Xuelian He, ; Cuiping Xiao, ; Linkong Zeng,
| | - Xuelian He
- Precision Medical Center, Wuhan Children’s Hospital (Wuhan Maternal and Child Healthcare Hospital), Tongji Medical College, Huazhong University of Science & Technology, Wuhan, China
- *Correspondence: Xuelian He, ; Cuiping Xiao, ; Linkong Zeng,
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4
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Charfeddine C, Laroussi N, Mkaouar R, Jouini R, Khayat O, Redissi A, Mosbah A, Dallali H, Chedly Debbiche A, Zaouak A, Fenniche S, Abdelhak S, Hammami-Ghorbel H. Expanding the clinical phenotype associated with NIPAL4 mutation: Study of a Tunisian consanguineous family with erythrokeratodermia variabilis-Like Autosomal Recessive Congenital Ichthyosis. PLoS One 2021; 16:e0258777. [PMID: 34669720 PMCID: PMC8528321 DOI: 10.1371/journal.pone.0258777] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/03/2021] [Accepted: 10/05/2021] [Indexed: 11/19/2022] Open
Abstract
Erythrokeratodermia variabilis (EKV) is a rare disorder of cornification usually associated with dominant mutations in the GJB3 and GJB4 genes encoding connexins (Cx)31 and 30.3. Genetic heterogeneity of EKV has already been suggested. We investigated at the clinical and genetic level a consanguineous Tunisian family with 2 sisters presenting an autosomal recessive form of EKV to better characterize this disease. Mutational analysis initially screened the connexin genes and Whole-exome sequencing (WES) was performed to identify the molecular aetiology of the particular EKV phenotype in the proband. Migratory shaped erythematous areas are the initial presenting sign followed by relatively stable hyperkeratotic plaques are the two predominates characteristics in both patients. However, remarkable variability of morphological and dominating features of the disease were observed between patients. In particular, the younger sister (proband) exhibited ichthyosiform-like appearance suggesting Autosomal Recessive Congenital Ichthyosis (ARCI) condition. No causative mutations were detected in the GJB3 and GJB4 genes. WES results revealed a novel missense homozygous mutation in NIPAL4 gene (c.835C>G, p.Pro279Ala) in both patients. This variant is predicted to be likely pathogenic. In addition, in silico analysis of the mutated 3D domain structure predicted that this variant would result in NIPA4 protein destabilization and Mg2+ transport perturbation, pointing out the potential role of NIPAL4 gene in the development and maintenance of the barrier function of the epidermis. Taken togheter, these results expand the clinical phenotype associated with NIPAL4 mutation and reinforce our hypothesis of NIPAL4 as the main candidate gene for the EKV-like ARCI phenotype.
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Affiliation(s)
- Cherine Charfeddine
- University Tunis El Manar, Institut Pasteur de Tunis, Biomedical Genomics and Oncogenetics Laboratory, LR20IPT05, Tunis, Tunisia
- Université de la Manouba, Institut de Biotechnologie de Sidi Thabet, Ariana, Tunisia
- * E-mail:
| | - Nadia Laroussi
- University Tunis El Manar, Institut Pasteur de Tunis, Biomedical Genomics and Oncogenetics Laboratory, LR20IPT05, Tunis, Tunisia
| | - Rahma Mkaouar
- University Tunis El Manar, Institut Pasteur de Tunis, Biomedical Genomics and Oncogenetics Laboratory, LR20IPT05, Tunis, Tunisia
| | - Raja Jouini
- Department of Pathology, Habib Thameur Hospital, Tunis, Tunisia
| | - Olfa Khayat
- Department of Pathology, Habib Thameur Hospital, Tunis, Tunisia
| | - Aladin Redissi
- BVBGR-LR11ES31, ISBST, Université de la Manouba, Institut de Biotechnologie de Sidi Thabet, Ariana, Tunisia
| | - Amor Mosbah
- BVBGR-LR11ES31, ISBST, Université de la Manouba, Institut de Biotechnologie de Sidi Thabet, Ariana, Tunisia
| | - Hamza Dallali
- University Tunis El Manar, Institut Pasteur de Tunis, Biomedical Genomics and Oncogenetics Laboratory, LR20IPT05, Tunis, Tunisia
| | | | - Anissa Zaouak
- Department of Dermatology, Genodermatosis and Cancers Laboratory LR12SP03, Habib Thameur Hospital, Tunis, Tunisia
| | - Sami Fenniche
- Department of Dermatology, Genodermatosis and Cancers Laboratory LR12SP03, Habib Thameur Hospital, Tunis, Tunisia
| | - Sonia Abdelhak
- University Tunis El Manar, Institut Pasteur de Tunis, Biomedical Genomics and Oncogenetics Laboratory, LR20IPT05, Tunis, Tunisia
| | - Houda Hammami-Ghorbel
- Department of Dermatology, Genodermatosis and Cancers Laboratory LR12SP03, Habib Thameur Hospital, Tunis, Tunisia
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5
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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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6
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Seidl‐Philipp M, Schatz UA, Gasslitter I, Moosbrugger‐Martinz V, Blunder S, Schossig AS, Zschocke J, Schmuth M, Gruber R. Spektrum der Ichthyosen in einer österreichischen Ichthyosekohorte von 2004–2007. J Dtsch Dermatol Ges 2020; 18:17-26. [DOI: 10.1111/ddg.13968_g] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/17/2019] [Accepted: 06/14/2019] [Indexed: 12/12/2022]
Affiliation(s)
- Magdalena Seidl‐Philipp
- Universitätsklinik für DermatologieVenerologie und AllergologieMedizinische Universität Innsbruck Innsbruck Österreich
| | - Ulrich A. Schatz
- Division für HumangenetikMedizinische Universität Innsbruck Innsbruck Österreich
| | - Irina Gasslitter
- Universitätsklinik für Innere Medizin IIMedizinische Universität Innsbruck Innsbruck Österreich
| | - Verena Moosbrugger‐Martinz
- Universitätsklinik für DermatologieVenerologie und AllergologieMedizinische Universität Innsbruck Innsbruck Österreich
| | - Stefan Blunder
- Universitätsklinik für DermatologieVenerologie und AllergologieMedizinische Universität Innsbruck Innsbruck Österreich
| | - Anna S. Schossig
- Division für HumangenetikMedizinische Universität Innsbruck Innsbruck Österreich
| | - Johannes Zschocke
- Division für HumangenetikMedizinische Universität Innsbruck Innsbruck Österreich
| | - Matthias Schmuth
- Universitätsklinik für DermatologieVenerologie und AllergologieMedizinische Universität Innsbruck Innsbruck Österreich
| | - Robert Gruber
- Universitätsklinik für DermatologieVenerologie und AllergologieMedizinische Universität Innsbruck Innsbruck Österreich
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7
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Li L, Liu W, Xu Y, Li M, Tang Q, Yu B, Cai R, Liu S. Targeted regions sequencing identified four novel PNPLA1 mutations in two Chinese families with autosomal recessive congenital ichthyosis. Mol Genet Genomic Med 2019; 8:e1076. [PMID: 31833240 PMCID: PMC7005637 DOI: 10.1002/mgg3.1076] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/13/2019] [Revised: 11/05/2019] [Accepted: 11/15/2019] [Indexed: 02/02/2023] Open
Abstract
Background Autosomal recessive congenital ichthyosis (ARCI) is a rare genetically heterogeneous cutaneous disease predominantly characterized by erythroderma, generalized abnormal scaling of the whole body and a collodion membrane at birth. Numerous causative genes have been demonstrated to be responsible for ARCI including PNPLA1 which can cause ARCI type 10. The objectives of this study are to describe clinical features of three ARCI patients from two Chinese unrelated families and to identify the underlying causative mutations. Methods Genomic DNA was extracted from peripheral venous blood obtained from the two Chinese ARCI families in Shandong province. Subsequently, targeted regions sequencing (TRS) followed by Sanger sequencing was conducted to identify and validate the likely pathogenic mutations of the ARCI families. Results Genetic analyses revealed four novel PNPLA1 variants that are predicted to be probably to lead to ARCI in three patients of two families. Patient 1 in one family was in compound heterozygous status for c.604delC/p.Arg202Glyfs*27 and c.820dupC/p.Arg274Profs*15, whereas c.738_742delinsCCCACAGATCCTGC/ p.Gly247_Tyr248delinsProGlnIleLeuHis, and c.816dupC/p.Arg274Profs*15 were found in patient 2 and 3 of the other family. In addition, these variants cosegregate in the two pedigrees and are all within highly conserved regions of the PNPLA1 protein, which indicate that the four mutations are likely pathogenic. Conclusion Our findings not only broaden the mutational spectrum of PNPLA1, but also contribute to establishing genotype–phenotype correlations for different forms of ARCI.
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Affiliation(s)
- Liangshan Li
- Medical Genetic Department, The Affiliated Hospital of Qingdao University, Qingdao, China.,Prenatal Diagnosis Center, The Affiliated Hospital of Qingdao University, Qingdao, China.,Department of Clinical Laboratory, Medical College of Qingdao University, Qingdao, China
| | - Wenmiao Liu
- Medical Genetic Department, The Affiliated Hospital of Qingdao University, Qingdao, China.,Prenatal Diagnosis Center, The Affiliated Hospital of Qingdao University, Qingdao, China
| | - Yinglei Xu
- Medical Genetic Department, The Affiliated Hospital of Qingdao University, Qingdao, China.,Prenatal Diagnosis Center, The Affiliated Hospital of Qingdao University, Qingdao, China
| | - Miaomiao Li
- Medical Genetic Department, The Affiliated Hospital of Qingdao University, Qingdao, China.,Prenatal Diagnosis Center, The Affiliated Hospital of Qingdao University, Qingdao, China
| | - Qian Tang
- Medical Genetic Department, The Affiliated Hospital of Qingdao University, Qingdao, China.,Prenatal Diagnosis Center, The Affiliated Hospital of Qingdao University, Qingdao, China
| | - Bo Yu
- Dermatological department, The Affiliated Hospital of Qingdao University, Qingdao, China
| | - Renmei Cai
- Prenatal Diagnosis Center, Qingdao Municipal Hospital, Qingdao, China
| | - Shiguo Liu
- Medical Genetic Department, The Affiliated Hospital of Qingdao University, Qingdao, China.,Prenatal Diagnosis Center, The Affiliated Hospital of Qingdao University, Qingdao, China
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8
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Seidl-Philipp M, Schatz UA, Gasslitter I, Moosbrugger-Martinz V, Blunder S, Schossig AS, Zschocke J, Schmuth M, Gruber R. Spectrum of ichthyoses in an Austrian ichthyosis cohort from 2004 to 2017. J Dtsch Dermatol Ges 2019; 18:17-25. [PMID: 31642606 DOI: 10.1111/ddg.13968] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/17/2019] [Accepted: 06/14/2019] [Indexed: 12/12/2022]
Abstract
BACKGROUND Ichthyoses are a heterogeneous disease group, which makes clinical classification challenging. An ichthyosis cohort at a center for genodermatoses is presented in detail. PATIENTS AND METHODS Patients with clinically and/or genetically confirmed ichthyosis seen from 2004 to 2017 and listed in a database were included. Disease onset, phenotype, histology, comorbidities and family history were described in detail. In genetically tested patients, the prevalence of various ARCI genes, ARCI phenotypes and syndromic ichthyoses, as well as genotype-phenotype correlation and year/method of genetic testing was assessed. RESULTS Of all 198 patients who were included in the cohort, 151 were genetically tested. 81 had ichthyosis vulgaris, 43 X-linked ichthyosis, 38 autosomal recessive congenital ichthyosis (ARCI), 9 keratinopathic ichthyosis (KPI) and one exfoliative ichthyosis. 26 individuals suffered from syndromic ichthyoses. A good genotype-phenotype correlation was observed for common ichthyoses and KPI; the correlation was less good in syndromic ichthyoses. In 91 % of ARCI patients an accurate diagnosis was obtained by genetic testing. In only 33 % of syndromic ichthyoses was the definitive diagnosis suspected before genetic testing, which revealed a causative mutation in 86 % of cases. CONCLUSION This study describes the spectrum of ichthyoses in a center of expertise and shows that genetic testing should become a diagnostic standard for this disease group.
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Affiliation(s)
- Magdalena Seidl-Philipp
- Department of Dermatology, Venereology and Allergology, Medical University of Innsbruck, Innsbruck, Austria
| | - Ulrich A Schatz
- Department of Human Genetics, Medical University of Innsbruck, Innsbruck, Austria
| | - Irina Gasslitter
- Department of Internal Medicine II, Medical University of Innsbruck, Innsbruck, Austria
| | - Verena Moosbrugger-Martinz
- Department of Dermatology, Venereology and Allergology, Medical University of Innsbruck, Innsbruck, Austria
| | - Stefan Blunder
- Department of Dermatology, Venereology and Allergology, Medical University of Innsbruck, Innsbruck, Austria
| | - Anna S Schossig
- Department of Human Genetics, Medical University of Innsbruck, Innsbruck, Austria
| | - Johannes Zschocke
- Department of Human Genetics, Medical University of Innsbruck, Innsbruck, Austria
| | - Matthias Schmuth
- Department of Dermatology, Venereology and Allergology, Medical University of Innsbruck, Innsbruck, Austria
| | - Robert Gruber
- Department of Dermatology, Venereology and Allergology, Medical University of Innsbruck, Innsbruck, Austria
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9
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Alallasi SR, Kokandi AA, Banagnapali B, Shaik NA, Al-Shehri BA, Alrayes NM, Al-Aama JY, Jelani M. Exome Analysis Identifies a Novel Compound Heterozygous Alteration in TGM1 Gene Leading to Lamellar Ichthyosis in a Child From Saudi Arabia: Case Presentation. Front Pediatr 2019; 7:44. [PMID: 30847336 PMCID: PMC6393366 DOI: 10.3389/fped.2019.00044] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/03/2018] [Accepted: 02/01/2019] [Indexed: 11/26/2022] Open
Abstract
Background: Lamellar ichthyosis is an autosomal recessive type of rare skin disorders characterized with defective epidermis leading hyperkeratosis with brownish-gray scales over the body. These patients are born as collodion babies and may also exhibit additional features like erythema, ectropion, and eclabium. This disease is mainly caused by homozygous and compound heterozygous alterations in transglutaminase 1 encoding gene (TGM1), which is located on 14q12. Case presentation: This study reports the genetic analysis of a 4-year Saudi girl presenting lamellar ichthyosis. She was the first child of unrelated parents. The family had no previous history of the disease phenotype. She was born as a collodion baby without any prenatal complications. At the time of this study she had developed rough scaly skin on her legs, arms and trunk regions with thick palms and soles. Whole exome sequencing (WES) followed by Sanger sequence validation identified a novel compound heterozygous variant in TGM1 gene. The paternal variant was a missense transition (c.1141G>A; p.Ala381Thr) present at exon 7, while maternal variant (c.758-1G>C) was present at the intron4-exon5 boundary. To the best of our knowledge these variants had not been reported before in TGM1 gene. Conclusion: In isolated and inbred populations, homozygous variants are identified more frequently; however, our results suggest that compound heterozygous variants should also be considered especially when the marriages are not consanguineous.
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Affiliation(s)
- Sami Raja Alallasi
- Department of Genetic Medicine, Faculty of Medicine, King Abdulaziz University, Jeddah, Saudi Arabia
| | - Amal A Kokandi
- Department of Dermatology, Faculty of Medicine, King Abdulaziz University, Jeddah, Saudi Arabia
| | - Babajan Banagnapali
- Department of Genetic Medicine, Faculty of Medicine, King Abdulaziz University, Jeddah, Saudi Arabia.,Princess Al-Jawhara Albrahim Center of Excellence in Research of Hereditary Disorders, King Abdulaziz University, Jeddah, Saudi Arabia
| | - Noor Ahmad Shaik
- Department of Genetic Medicine, Faculty of Medicine, King Abdulaziz University, Jeddah, Saudi Arabia.,Princess Al-Jawhara Albrahim Center of Excellence in Research of Hereditary Disorders, King Abdulaziz University, Jeddah, Saudi Arabia
| | - Bandar Ali Al-Shehri
- Princess Al-Jawhara Albrahim Center of Excellence in Research of Hereditary Disorders, King Abdulaziz University, Jeddah, Saudi Arabia
| | - Nuha Mohammad Alrayes
- Faculty of Applied Medical Sciences, King Abdulaziz University, Jeddah, Saudi Arabia
| | - Jumana Yousuf Al-Aama
- Department of Genetic Medicine, Faculty of Medicine, King Abdulaziz University, Jeddah, Saudi Arabia.,Princess Al-Jawhara Albrahim Center of Excellence in Research of Hereditary Disorders, King Abdulaziz University, Jeddah, Saudi Arabia
| | - Musharraf Jelani
- Department of Genetic Medicine, Faculty of Medicine, King Abdulaziz University, Jeddah, Saudi Arabia.,Centre for Omic Sciences, Islamia College Peshawar, Peshawar, Pakistan
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10
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Assessment of coding region variants in Kuwaiti population: implications for medical genetics and population genomics. Sci Rep 2018; 8:16583. [PMID: 30409984 PMCID: PMC6224454 DOI: 10.1038/s41598-018-34815-8] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/10/2017] [Accepted: 10/16/2018] [Indexed: 02/07/2023] Open
Abstract
Consanguineous populations of the Arabian Peninsula have been underrepresented in global efforts that catalogue human exome variability. We sequenced 291 whole exomes of unrelated, healthy native Arab individuals from Kuwait to a median coverage of 45X and characterised 170,508 single-nucleotide variants (SNVs), of which 21.7% were ‘personal’. Up to 12% of the SNVs were novel and 36% were population-specific. Half of the SNVs were rare and 54% were missense variants. The study complemented the Greater Middle East Variome by way of reporting many additional Arabian exome variants. The study corroborated Kuwaiti population genetic substructures previously derived using genome-wide genotype data and illustrated the genetic relatedness among Kuwaiti population subgroups, Middle Eastern, European and Ashkenazi Jewish populations. The study mapped 112 rare and frequent functional variants relating to pharmacogenomics and disorders (recessive and common) to the phenotypic characteristics of Arab population. Comparative allele frequency data and carrier distributions of known Arab mutations for 23 disorders seen among Arabs, of putative OMIM-listed causal mutations for 12 disorders observed among Arabs but not yet characterized for genetic basis in Arabs, and of 17 additional putative mutations for disorders characterized for genetic basis in Arab populations are presented for testing in future Arab studies.
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