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Komlosi K, Glocker C, Hsu-Rehder HH, Alter S, Kopp J, Hotz A, Zimmer AD, Hausser-Siller I, Sandhoff R, Oji V, Fischer J. Autosomal dominant lamellar ichthyosis due to a missense mutation in the gene NKPD1. J Invest Dermatol 2024:S0022-202X(24)00303-8. [PMID: 38642798 DOI: 10.1016/j.jid.2024.03.041] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/15/2024] [Revised: 02/23/2024] [Accepted: 03/08/2024] [Indexed: 04/22/2024]
Abstract
The identification of monogenic causes for cornification disorders has enhanced our understanding of epidermal differentiation and skin barrier function. Autosomal dominant lamellar ichthyosis (ADLI) is a rare condition, and ASPRV1 was the only gene linked to ADLI to date. We identified a heterozygous variant (ENST00000686631.1:c.1372G>T, p.(Val458Phe)) in the NKPD1 gene in seven individuals from a four-generation German pedigree with generalized lamellar ichthyosis by whole exome sequencing. Segregation analysis confirmed its presence in affected individuals, resulting in a LOD score of 3.31. NKPD1 encodes the NTPase KAP Family P-Loop Domain-Containing Protein 1, implicated in the plasma membrane, its role in human disease is as yet unknown. Skin histology showed moderate acanthosis and compact orthohyperkeratosis, and the ultrastructure differed clearly from that in ASPRV1-ADLI. While NKPD1 mRNA expression increased during keratinocyte differentiation, stratum corneum ceramides exhibited no significant changes. However, affected individuals showed an elevated ratio of protein-bound ceramides to omega-esterified ceramides. This highlights NKPD1's role in ADLI, impacting ceramide metabolism and skin lipid barrier formation, as demonstrated through functional characterization.
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Affiliation(s)
- Katalin Komlosi
- Institute of Human Genetics, Medical Center - University of Freiburg, Faculty of Medicine, University of Freiburg, Freiburg, Germany; Center for Cornification Disorders, Freiburg Center For Rare Diseases, University of Freiburg, Freiburg, Germany.
| | - Cristina Glocker
- Institute of Human Genetics, Medical Center - University of Freiburg, Faculty of Medicine, University of Freiburg, Freiburg, Germany; Center for Cornification Disorders, Freiburg Center For Rare Diseases, University of Freiburg, Freiburg, Germany.
| | - Hao-Hsiang Hsu-Rehder
- Institute of Human Genetics, Medical Center - University of Freiburg, Faculty of Medicine, University of Freiburg, Freiburg, Germany; Center for Cornification Disorders, Freiburg Center For Rare Diseases, University of Freiburg, Freiburg, Germany.
| | - Svenja Alter
- Institute of Human Genetics, Medical Center - University of Freiburg, Faculty of Medicine, University of Freiburg, Freiburg, Germany; Center for Cornification Disorders, Freiburg Center For Rare Diseases, University of Freiburg, Freiburg, Germany.
| | - Julia Kopp
- Institute of Human Genetics, Medical Center - University of Freiburg, Faculty of Medicine, University of Freiburg, Freiburg, Germany; Center for Cornification Disorders, Freiburg Center For Rare Diseases, University of Freiburg, Freiburg, Germany.
| | - Alrun Hotz
- Institute of Human Genetics, Medical Center - University of Freiburg, Faculty of Medicine, University of Freiburg, Freiburg, Germany; Center for Cornification Disorders, Freiburg Center For Rare Diseases, University of Freiburg, Freiburg, Germany.
| | - Andreas David Zimmer
- Institute of Human Genetics, Medical Center - University of Freiburg, Faculty of Medicine, University of Freiburg, Freiburg, Germany; Center for Cornification Disorders, Freiburg Center For Rare Diseases, University of Freiburg, Freiburg, Germany.
| | | | - Roger Sandhoff
- Lipid Pathobiochemistry Group, German Cancer Research Center, Heidelberg, Germany.
| | - Vinzenz Oji
- Department of Dermatology, University Hospital Münster, Münster, Germany.
| | - Judith Fischer
- Institute of Human Genetics, Medical Center - University of Freiburg, Faculty of Medicine, University of Freiburg, Freiburg, Germany; Center for Cornification Disorders, Freiburg Center For Rare Diseases, University of Freiburg, Freiburg, Germany.
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Koutra E, Lusmöller E, Fischer J, Komlosi K, Stadler R, Gutzmer R. [Focal dermal hypoplasia associated with pathogenic PORCN gene variant in postzygotic, unilateral mosaic form]. Dermatologie (Heidelb) 2024:10.1007/s00105-024-05308-9. [PMID: 38366244 DOI: 10.1007/s00105-024-05308-9] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Accepted: 01/24/2024] [Indexed: 02/18/2024]
Abstract
We report a case of a 29-year-old woman with subtle partial erythematous, partial hyperpigmented streaks along the Blaschko's lines on the right side of the body since early childhood. Primary DNA results of the skin and blood assay diagnosed focal dermal hypoplasia in mosaic form. The postzygotic mutation in the PORCN gene was only detectable in the affected skin and not in the blood assay. This article illustrates that clinically very discrete hypopigmentation and poikiloderma along Blaschko lines should raise awareness for robust diagnostic analysis in order to recognize this variable multisystem disease and to ensure an appropriate search for extracutaneous abnormalities and human genetic counseling, ideally before pregnancy. Careful correlation of clinical, histological, and genetic features along with close multidisciplinary cooperation of specialists from the fields of human genetics, dermatology, pediatrics, orthopedics and ophthalmology is crucial for final diagnosis, assessment of the prognosis and targeted genetic counseling of affected individuals.
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Affiliation(s)
- Eleni Koutra
- Universitätsklinik für Dermatologie, Venerologie, Allergologie und Phlebologie, Johannes Wesling Klinikum Minden, Hans-Nolte-Str. 1, 32429, Minden, Deutschland.
| | - Elke Lusmöller
- Universitätsklinik für Dermatologie, Venerologie, Allergologie und Phlebologie, Johannes Wesling Klinikum Minden, Hans-Nolte-Str. 1, 32429, Minden, Deutschland
| | - Judith Fischer
- Institut für Humangenetik, Universitätsklinikum Freiburg, Freiburg, Deutschland
| | - Katalin Komlosi
- Institut für Humangenetik, Universitätsklinikum Freiburg, Freiburg, Deutschland
| | - Rudolf Stadler
- Universitätsklinik für Dermatologie, Venerologie, Allergologie und Phlebologie, Johannes Wesling Klinikum Minden, Hans-Nolte-Str. 1, 32429, Minden, Deutschland
| | - Ralf Gutzmer
- Universitätsklinik für Dermatologie, Venerologie, Allergologie und Phlebologie, Johannes Wesling Klinikum Minden, Hans-Nolte-Str. 1, 32429, Minden, Deutschland
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Göbel T, Maier A, Schlump A, Runge K, Nickel K, Tebartz van Elst L, Schiele MA, Domschke K, Gläser B, Tzschach A, Komlosi K, Endres D. Obsessive-compulsive symptoms and 15q11.2q13.1 duplication syndrome. Eur Neuropsychopharmacol 2024; 78:67-69. [PMID: 38041926 DOI: 10.1016/j.euroneuro.2023.09.009] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/25/2023] [Revised: 09/20/2023] [Accepted: 09/25/2023] [Indexed: 12/04/2023]
Affiliation(s)
- Theresa Göbel
- Department of Psychiatry and Psychotherapy, Medical Center - University of Freiburg, Faculty of Medicine, University of Freiburg, Freiburg, Germany
| | - Alexander Maier
- Department of Psychiatry and Psychotherapy, Medical Center - University of Freiburg, Faculty of Medicine, University of Freiburg, Freiburg, Germany
| | - Andrea Schlump
- Department of Psychiatry and Psychotherapy, Medical Center - University of Freiburg, Faculty of Medicine, University of Freiburg, Freiburg, Germany
| | - Kimon Runge
- Department of Psychiatry and Psychotherapy, Medical Center - University of Freiburg, Faculty of Medicine, University of Freiburg, Freiburg, Germany
| | - Kathrin Nickel
- Department of Psychiatry and Psychotherapy, Medical Center - University of Freiburg, Faculty of Medicine, University of Freiburg, Freiburg, Germany
| | - Ludger Tebartz van Elst
- Department of Psychiatry and Psychotherapy, Medical Center - University of Freiburg, Faculty of Medicine, University of Freiburg, Freiburg, Germany
| | - Miriam A Schiele
- Department of Psychiatry and Psychotherapy, Medical Center - University of Freiburg, Faculty of Medicine, University of Freiburg, Freiburg, Germany
| | - Katharina Domschke
- Department of Psychiatry and Psychotherapy, Medical Center - University of Freiburg, Faculty of Medicine, University of Freiburg, Freiburg, Germany
| | - Birgitta Gläser
- Institute of Human Genetics, Medical Center - University of Freiburg, Faculty of Medicine, University of Freiburg, Freiburg, Germany
| | - Andreas Tzschach
- Institute of Human Genetics, Medical Center - University of Freiburg, Faculty of Medicine, University of Freiburg, Freiburg, Germany
| | - Katalin Komlosi
- Institute of Human Genetics, Medical Center - University of Freiburg, Faculty of Medicine, University of Freiburg, Freiburg, Germany
| | - Dominique Endres
- Department of Psychiatry and Psychotherapy, Medical Center - University of Freiburg, Faculty of Medicine, University of Freiburg, Freiburg, Germany.
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Toutouna L, Beck-Woedl S, Feige U, Glaeser B, Komlosi K, Eckenweiler M, Luetzen N, Haack TB, Fischer J, Bader I, Tzschach A. Novel homozygous LAMB1 in-frame deletion in a pediatric patient with brain anomalies and cerebrovascular event. Am J Med Genet A 2023; 191:2656-2663. [PMID: 37466007 DOI: 10.1002/ajmg.a.63349] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/17/2023] [Revised: 06/07/2023] [Accepted: 06/28/2023] [Indexed: 07/20/2023]
Abstract
Biallelic pathogenic variants in LAMB1 have been associated with autosomal recessive lissencephaly 5 (OMIM 615191), which is characterized by brain malformations (cobblestone lissencephaly, hydrocephalus), developmental delay, and epilepsy. Pathogenic variants in LAMB1 are rare, with only 11 pathogenic variants and 11 patients reported to date. Here, we report on a 6-year-old patient from a consanguineous family with profound developmental delay, microcephaly, and a history of a perinatal cerebrovascular event. Brain magnetic resonance imaging (MRI) showed cerebellar cystic defects, signal intensity abnormalities, and a hypoplastic corpus callosum. Trio-exome analysis revealed a homozygous in-frame deletion of Exons 23 and 24 of LAMB1 affecting 104 amino acids including the epidermal growth factor (EGF)-like units 11 and 12 in Domain III. To our knowledge, this is the first reported in-frame deletion in LAMB1. Our findings broaden the clinical and molecular spectrum of LAMB1-associated syndromes.
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Affiliation(s)
- Louiza Toutouna
- Faculty of Medicine, Institute of Human Genetics, University Medical Center Freiburg, University of Freiburg, Freiburg, Germany
| | - Stefanie Beck-Woedl
- Institute of Medical Genetics and Applied Genomics, University of Tübingen, Tübingen, Germany
| | - Ursula Feige
- Department of Neuroradiology, Faculty of Medicine, University Medical Center Freiburg, University of Freiburg, Freiburg, Germany
| | - Birgitta Glaeser
- Faculty of Medicine, Institute of Human Genetics, University Medical Center Freiburg, University of Freiburg, Freiburg, Germany
| | - Katalin Komlosi
- Faculty of Medicine, Institute of Human Genetics, University Medical Center Freiburg, University of Freiburg, Freiburg, Germany
| | - Matthias Eckenweiler
- Department of Neuropediatrics and Muscle Disorders, Faculty of Medicine, University Medical Center Freiburg, University of Freiburg, Freiburg, Germany
| | - Niklas Luetzen
- Department of Neuroradiology, Faculty of Medicine, University Medical Center Freiburg, University of Freiburg, Freiburg, Germany
| | - Tobias B Haack
- Institute of Medical Genetics and Applied Genomics, University of Tübingen, Tübingen, Germany
| | - Judith Fischer
- Faculty of Medicine, Institute of Human Genetics, University Medical Center Freiburg, University of Freiburg, Freiburg, Germany
| | - Ingrid Bader
- Institute of Medical Genetics and Applied Genomics, University of Tübingen, Tübingen, Germany
| | - Andreas Tzschach
- Faculty of Medicine, Institute of Human Genetics, University Medical Center Freiburg, University of Freiburg, Freiburg, Germany
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Valette C, Jonca N, Fischer J, Pernin-Grandjean J, Granier Tournier C, Diociaiuti A, Neri I, Dreyfus I, Furman M, Giehl K, Wollenberg A, Mallet S, Martin L, Martin-Santiago A, Onnis G, Broue P, Leclerc-Mercier S, Schmuth M, Sprecher E, Gruber R, Suessmuth K, Bourrat E, Komlosi K, Hill S, O'Toole EA, Schischmanoff O, Caux F, Mazereeuw-Hautier J. A retrospective study on the liver toxicity of oral retinoids in Chanarin-Dorfman syndrome. J Eur Acad Dermatol Venereol 2023; 37:e1237-e1241. [PMID: 37257069 DOI: 10.1111/jdv.19235] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/21/2023] [Accepted: 05/26/2023] [Indexed: 06/02/2023]
Affiliation(s)
- C Valette
- Reference Centre for Rare Skin Diseases, Department of Dermatology, Larrey Hospital, CHU Toulouse, Toulouse, France
| | - N Jonca
- Infinity, University of Toulouse, CNRS, INSERM, Université Paul Sabatier, Toulouse, France
- Laboratoire de Biologie Cellulaire et Cytologie, Institut Fédératif de Biologie, Hôpital Purpan, CHU Toulouse, Toulouse, France
| | - J Fischer
- Institute of Human Genetics, University Medical Center, Freiburg, Germany
| | - J Pernin-Grandjean
- Infinity, University of Toulouse, CNRS, INSERM, Université Paul Sabatier, Toulouse, France
- Laboratoire de Biologie Cellulaire et Cytologie, Institut Fédératif de Biologie, Hôpital Purpan, CHU Toulouse, Toulouse, France
| | - C Granier Tournier
- Reference Centre for Rare Skin Diseases, Department of Dermatology, Larrey Hospital, CHU Toulouse, Toulouse, France
| | - A Diociaiuti
- Dermatology Unit and Genodermatosis Unit, Genetics and Rare Diseases Research Division, Bambino Gesù Children's Hospital, IRCCS, Rome, Italy
| | - I Neri
- Department of Dermatology, IRCCS Azienda Ospedaliero-Universitaria di Bologna, Bologna, Italy
| | - I Dreyfus
- Reference Centre for Rare Skin Diseases, Department of Dermatology, Larrey Hospital, CHU Toulouse, Toulouse, France
| | - M Furman
- Department of Dermatology, Tel Aviv Sourasky Medical Center, Tel Aviv, Israel
| | - K Giehl
- Department of Dermatology and Allergy, University Hospital, LMU Munich, Munich, Germany
| | - A Wollenberg
- Department of Dermatology and Allergy, University Hospital, LMU Munich, Munich, Germany
| | - S Mallet
- Department of Dermatology, University Hospital Center of Marseille, Marseille, France
| | - L Martin
- Department of Dermatology, University Hospital Center of Angers, Angers, France
| | - A Martin-Santiago
- Department of Dermatology, Hospital Universitari Son Espases, Palma, Spain
| | - G Onnis
- Reference Centre for Rare Skin Diseases, Department of Dermatology, Larrey Hospital, CHU Toulouse, Toulouse, France
| | - P Broue
- Pediatric Hepatology and Reference Centre for Inborn Error of Metabolism, Children Hospital, Toulouse, France
| | - S Leclerc-Mercier
- Department of Pathology and Reference Center for Genodermatoses and Rare Skin Diseases (MAGEC), Necker- Enfants Malades University Hospital, Paris, France
| | - M Schmuth
- Department of Dermatology, Venereology and Allergy, Medical University of Innsbruck and Karl Landsteiner Institute for Paediatric Dermatology and Rare Diseases, Innsbruck, Austria
| | - E Sprecher
- Department of Dermatology, Tel Aviv Sourasky Medical Center, Tel Aviv, Israel
| | - R Gruber
- Department of Dermatology, Venereology and Allergy, Medical University of Innsbruck and Karl Landsteiner Institute for Paediatric Dermatology and Rare Diseases, Innsbruck, Austria
| | - K Suessmuth
- Department of Dermatology, University Hospital of Muenster, Muenster, Germany
| | - E Bourrat
- Department of Dermatology, Saint-Louis Hospital, Paris, France
- Department of General Paediatrics, Robert-Debré Hospital, Paris, France
| | - K Komlosi
- Institute of Human Genetics, University Medical Center, Freiburg, Germany
| | - S Hill
- Department of Dermatology, Royal London Hospital, Barts Health NHS Trust ERN-Skin, London, UK
| | - E A O'Toole
- Department of Dermatology, Royal London Hospital, Barts Health NHS Trust ERN-Skin, London, UK
| | - O Schischmanoff
- Department of Dermatology, MAGEC, Groupe Hospitalier Paris Seine-Saint-Denis, AP-HP and INSERM UMR1125, Bobigny, France
| | - F Caux
- Department of Dermatology, Groupe Hospitalier Paris Seine-Saint-Denis, AP-HP and INSERM UMR1125, Bobigny, France
| | - J Mazereeuw-Hautier
- Reference Centre for Rare Skin Diseases, Department of Dermatology, Larrey Hospital, CHU Toulouse, Toulouse, France
- Infinity, University of Toulouse, CNRS, INSERM, Université Paul Sabatier, Toulouse, France
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Fischer J, Hotz A, Komlosi K. Syndromic ichthyoses. MED GENET-BERLIN 2023. [DOI: 10.1515/medgen-2023-2006] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 04/08/2023]
Abstract
Abstract
Inherited ichthyoses are classified as Mendelian disorders of cornification (MEDOC), which are further defined on the basis of clinical and genetic features and can be divided into non-syndromic and syndromic forms. To date, mutations in more than 30 genes are known to result in various types of syndromic ichthyoses, which, in addition to mostly generalised scaling and hyperkeratosis of the skin, also show additional organ involvement. The syndromic ichthyoses are generally very rare and are classified based on the mode of inheritance, and can be further subdivided according to the predominant symptoms.
In our review we provide a concise overview of the most prevalent syndromic forms of ichthyosis within each subgroup. We emphasize the importance of the clinical assessment of complex syndromes even in the era of genetic testing as a first-tier diagnostic and specifically the need to actively assess potential organ involvement in patients with ichthyosis, thereby enabling efficient diagnostic and therapeutic approaches and timely access to specialized centers for rare disorders of cornifications. As part of the Freiburg Center for Rare Diseases a Center for Cornification Disorders was recently established with collaboration of the Institute of Human Genetics and the Department of Dermatology.
An early diagnosis of syndromes will be of direct benefit to the patient regarding interventional and therapeutic measures e. g. in syndromes with cardiac or metabolic involvement and allows informed reproductive options and access to prenatal and preimplantation genetic diagnosis in the family.
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Affiliation(s)
- Judith Fischer
- University of Freiburg Faculty of Medicine Freiburg Deutschland
| | - Alrun Hotz
- University of Freiburg Faculty of Medicine Freiburg Deutschland
| | - Katalin Komlosi
- University of Freiburg Faculty of Medicine Freiburg Deutschland
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Frommherz L, Komlosi K, Hewel C, Kopp J, Dewenter M, Zimmer A, Bartsch O, Linke M, Technau-Hafsi K, Gerber S, Fischer J, Has C. Acral lamellar ichthyosis with amino acid substitution in the C-terminus of keratin 2. J Eur Acad Dermatol Venereol 2023; 37:817-822. [PMID: 36331357 DOI: 10.1111/jdv.18719] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/03/2022] [Accepted: 10/25/2022] [Indexed: 11/06/2022]
Abstract
BACKGROUND Most cases of hereditary ichthyoses present with generalized scaling and skin dryness. However, in some cases skin involvement is restricted to particular body regions as in acral lamellar ichthyosis. OBJECTIVES We report on the genetic basis of acral ichthyosis in two families presenting with a similar phenotype. METHODS Genetic testing was performed by targeted next generation sequencing and whole-exome sequencing. For identity-by-descent analysis, the parents were genotyped and data analysis was performed with the Chromosome Analysis Suite Software. RT-PCR with RNA extracted from skin samples was used to analyse the effect of variants on splicing. RESULTS Genetic testing identified a few heterozygous variants, but only the variant in KRT2 c.1912 T > C, p.Phe638Leu segregated with the disease and remained the strongest candidate. Pairwise identity-by-descent analysis revealed no indication of family relationship. Phenylalanine 638 is the second last amino acid upstream of the termination codon in the tail of K2, and substitution to leucine is predicted as probably damaging. Assessment of the variant is difficult, in part due to the lack of crystal structures of this region. CONCLUSIONS Altogether, we show that a type of autosomal dominant acral ichthyosis is most probably caused by an amino acid substitution in the C-terminus of keratin 2.
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Affiliation(s)
- Leonie Frommherz
- Department of Dermatology, Medical Center, Faculty of Medicine, University of Freiburg, Freiburg, Germany
- Department of Dermatology and Allergy, Ludwig-Maximilians-Universität München (LMU) Munich, University Hospital, Munich, Germany
| | - Katalin Komlosi
- Institute of Human Genetics, Medical Center, Faculty of Medicine, University of Freiburg, Freiburg, Germany
| | - Charlotte Hewel
- Institute of Human Genetics, University Medical Center of the Johannes Gutenberg University Mainz, Mainz, Germany
| | - Julia Kopp
- Institute of Human Genetics, Medical Center, Faculty of Medicine, University of Freiburg, Freiburg, Germany
| | - Malin Dewenter
- Institute of Human Genetics, University Medical Center of the Johannes Gutenberg University Mainz, Mainz, Germany
| | - Andreas Zimmer
- Institute of Human Genetics, Medical Center, Faculty of Medicine, University of Freiburg, Freiburg, Germany
| | - Oliver Bartsch
- Institute of Human Genetics, University Medical Center of the Johannes Gutenberg University Mainz, Mainz, Germany
| | - Matthias Linke
- Institute of Human Genetics, University Medical Center of the Johannes Gutenberg University Mainz, Mainz, Germany
| | - Kristin Technau-Hafsi
- Department of Dermatology, Medical Center, Faculty of Medicine, University of Freiburg, Freiburg, Germany
| | - Susanne Gerber
- Institute of Human Genetics, University Medical Center of the Johannes Gutenberg University Mainz, Mainz, Germany
- Computational Systems Genomics Group, Johannes Gutenberg University Mainz, Mainz, Germany
| | - Judith Fischer
- Institute of Human Genetics, Medical Center, Faculty of Medicine, University of Freiburg, Freiburg, Germany
| | - Cristina Has
- Department of Dermatology, Medical Center, Faculty of Medicine, University of Freiburg, Freiburg, Germany
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8
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Hotz A, Kopp J, Bourrat E, Oji V, Süßmuth K, Komlosi K, Bouadjar B, Tantcheva-Poór I, Hellström Pigg M, Betz RC, Giehl K, Schedel F, Weibel L, Schulz S, Stölzl DV, Tadini G, Demiral E, Berggard K, Zimmer AD, Alter S, Fischer J. Mutational Spectrum of the ABCA12 Gene and Genotype–Phenotype Correlation in a Cohort of 64 Patients with Autosomal Recessive Congenital Ichthyosis. Genes (Basel) 2023; 14:genes14030717. [PMID: 36980989 PMCID: PMC10048568 DOI: 10.3390/genes14030717] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/18/2023] [Revised: 03/10/2023] [Accepted: 03/12/2023] [Indexed: 03/17/2023] Open
Abstract
Autosomal recessive congenital ichthyosis (ARCI) is a non-syndromic congenital disorder of cornification characterized by abnormal scaling of the skin. The three major phenotypes are lamellar ichthyosis, congenital ichthyosiform erythroderma, and harlequin ichthyosis. ARCI is caused by biallelic mutations in ABCA12, ALOX12B, ALOXE3, CERS3, CYP4F22, NIPAL4, PNPLA1, SDR9C7, SULT2B1, and TGM1. The most severe form of ARCI, harlequin ichthyosis, is caused by mutations in ABCA12. Mutations in this gene can also lead to congenital ichthyosiform erythroderma or lamellar ichthyosis. We present a large cohort of 64 patients affected with ARCI carrying biallelic mutations in ABCA12. Our study comprises 34 novel mutations in ABCA12, expanding the mutational spectrum of ABCA12-associated ARCI up to 217 mutations. Within these we found the possible mutational hotspots c.4541G>A, p.(Arg1514His) and c.4139A>G, p.(Asn1380Ser). A correlation of the phenotype with the effect of the genetic mutation on protein function is demonstrated. Loss-of-function mutations on both alleles generally result in harlequin ichthyosis, whereas biallelic missense mutations mainly lead to CIE or LI.
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Affiliation(s)
- Alrun Hotz
- Institute of Human Genetics, Medical Center—University of Freiburg, Faculty of Medicine, University of Freiburg, 79106 Freiburg, Germany
- Center for Cornification Disorders, Freiburg Center for Rare Diseases, Medical Center, University of Freiburg, 79106 Freiburg, Germany
- European Reference Networks (ERN Skin), 75015 Paris, France
| | - Julia Kopp
- Institute of Human Genetics, Medical Center—University of Freiburg, Faculty of Medicine, University of Freiburg, 79106 Freiburg, Germany
| | - Emmanuelle Bourrat
- Department of Dermatology, Reference Center for Rare Skin Diseases MAGEC, Saint Louis Hospital AP-HP, 75015 Paris, France
| | - Vinzenz Oji
- European Reference Networks (ERN Skin), 75015 Paris, France
- Department of Dermatology and Venereology, Muenster University Medical Center, 48149 Muenster, Germany
| | - Kira Süßmuth
- Department of Dermatology and Venereology, Muenster University Medical Center, 48149 Muenster, Germany
| | - Katalin Komlosi
- Institute of Human Genetics, Medical Center—University of Freiburg, Faculty of Medicine, University of Freiburg, 79106 Freiburg, Germany
- Center for Cornification Disorders, Freiburg Center for Rare Diseases, Medical Center, University of Freiburg, 79106 Freiburg, Germany
- European Reference Networks (ERN Skin), 75015 Paris, France
| | - Bakar Bouadjar
- Department of Dermatology, CHU of Bab-El-Oued Algiers, Algiers 16008, Algeria
| | - Iliana Tantcheva-Poór
- Department of Dermatology and Venereology, Faculty of Medicine and University Hospital, University of Cologne, 50937 Cologne, Germany
| | | | - Regina C. Betz
- Institute of Human Genetics, University of Bonn, Medical Faculty & University Hospital Bonn, 53127 Bonn, Germany
| | - Kathrin Giehl
- European Reference Networks (ERN Skin), 75015 Paris, France
- Department of Dermatology, Venerology und Allergology, University Hospital of Munich, 80337 Munich, Germany
| | - Fiona Schedel
- Department of Dermatology and Venereology, Muenster University Medical Center, 48149 Muenster, Germany
| | - Lisa Weibel
- Pediatric Skin Center, Dermatology Department, University Children’s Hospital Zurich, 8032 Zurich, Switzerland
| | - Solveig Schulz
- Synlab Medical Practice for Human Genetics Jena, 07747 Jena, Germany
| | - Dora V. Stölzl
- Center for Inflammatory Skin Diseases, Department of Dermatology and Allergy, University Hospital Schleswig-Holstein, Campus Kiel, 24105 Kiel, Germany
| | - Gianluca Tadini
- European Reference Networks (ERN Skin), 75015 Paris, France
- Pediatric Dermatology Unit, Department of Pathophysiology and Transplantation, Fondazione IRCCS Ca’ Granda—Ospedale Maggiore Policlinico, University of Milan, 20122 Milan, Italy
| | - Emine Demiral
- Department of Medical Genetics, Inonu University School of Medicine, 44280 Malatya, Turkey
| | - Karin Berggard
- Department of Dermatology and Venereology, Skåne University Hospital, 221 85 Lund, Sweden
| | - Andreas D. Zimmer
- Institute of Human Genetics, Medical Center—University of Freiburg, Faculty of Medicine, University of Freiburg, 79106 Freiburg, Germany
| | - Svenja Alter
- Institute of Human Genetics, Medical Center—University of Freiburg, Faculty of Medicine, University of Freiburg, 79106 Freiburg, Germany
- Center for Cornification Disorders, Freiburg Center for Rare Diseases, Medical Center, University of Freiburg, 79106 Freiburg, Germany
- European Reference Networks (ERN Skin), 75015 Paris, France
| | - Judith Fischer
- Institute of Human Genetics, Medical Center—University of Freiburg, Faculty of Medicine, University of Freiburg, 79106 Freiburg, Germany
- Center for Cornification Disorders, Freiburg Center for Rare Diseases, Medical Center, University of Freiburg, 79106 Freiburg, Germany
- European Reference Networks (ERN Skin), 75015 Paris, France
- Correspondence: ; Tel.: +49-(0)761-270-70510; Fax: +49-(0)761-270-70410
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9
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Hake L, Süßmuth K, Komlosi K, Kopp J, Drerup C, Metze D, Traupe H, Hausser I, Eckl KM, Hennies HC, Fischer J, Oji V. Quality of life and clinical characteristics of self-improving congenital ichthyosis within the disease spectrum of autosomal recessive congenital ichthyosis. J Eur Acad Dermatol Venereol 2021; 36:582-591. [PMID: 34908195 DOI: 10.1111/jdv.17873] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/29/2021] [Accepted: 11/10/2021] [Indexed: 11/29/2022]
Abstract
BACKGROUND Autosomal recessive congenital ichthyosis (ARCI) is a heterogeneous group of ichthyoses presenting at birth. Self-improving congenital ichthyosis (SICI) is a subtype of ARCI and is diagnosed when skin condition improves remarkably (within years) after birth. So far, there is sparse data on SICI and quality of life (QoL) in this ARCI subtype. This study aims to further delineate the clinical spectrum of SICI as a rather unique subtype of ARCI. OBJECTIVES This prospective study included 78 patients (median age: 15 years) with ARCI who were subdivided in SICI (n=18) and non-SICI patients (nSICI, n=60) by their ARCI phenotype. METHODS Quality of life (QoL) was assessed using the (Children's) Dermatology Life Quality Index. Statistical analysis was performed with Chi-square- and t-tests. RESULTS The genetically confirmed SICI patients presented causative mutations in the following genes: ALOXE3 (8/16; 50.0%), ALOX12B (6/16; 37.5%), PNPLA1 (1/16; 6.3%) and CYP4F22 (1/16; 6.3%). Hypo-/anhidrosis and insufficient Vitamin D levels (< 30 ng/ml) were often seen in SICI patients. Brachydactyly (a shortening of the 4th and 5th finger) was statistically more frequent in SICI (p=0.023) than nSICI patients. A kink of the ear's helix was seen in half of the SICI patients and tends to occur more frequently in patients with ALOX12B mutations (p=0.005). QoL was less impaired in patients under the age of 16, regardless of ARCI type. CONCLUSIONS SICI is an underestimated, milder clinical variant of ARCI including distinct features such as brachydactyly and kinking of the ears. Clinical experts should be aware of these features when seeing neonates with a collodion membrane. SICI patients should be regularly checked for clinical parameters such as hypo-/anhidrosis or vitamin D levels and monitored for changes in quality of life.
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Affiliation(s)
- L Hake
- Department of Dermatology, Elbe Klinikum Buxtehude, Buxtehude, Germany
| | - K Süßmuth
- Department of Dermatology, University Hospital Münster, Münster, Germany
| | - K Komlosi
- Institute of Human Genetics, Medical Center, University of Freiburg, Faculty of Medicine, University of Freiburg, Freiburg, Germany
| | - J Kopp
- Institute of Human Genetics, Medical Center, University of Freiburg, Faculty of Medicine, University of Freiburg, Freiburg, Germany
| | - C Drerup
- Department of Dermatology, University Hospital Münster, Münster, Germany
| | - D Metze
- Department of Dermatology, University Hospital Münster, Münster, Germany
| | - H Traupe
- Department of Dermatology, University Hospital Münster, Münster, Germany
| | - I Hausser
- Institute of Pathology, Heidelberg University Hospital, Heidelberg, Germany
| | - K M Eckl
- Department of Biological and Geographical Sciences, University of Huddersfield, Huddersfield, United Kingdom.,Division of Human Genetics, Medical University of Innsbruck, Innsbruck, Austria.,Department of Biology, Edge Hill University, Ormskirk, UK
| | - H C Hennies
- Department of Biological and Geographical Sciences, University of Huddersfield, Huddersfield, United Kingdom.,Cologne Center for Genomics, University Hospital Cologne, Cologne, Germany
| | - J Fischer
- Institute of Human Genetics, Medical Center, University of Freiburg, Faculty of Medicine, University of Freiburg, Freiburg, Germany
| | - V Oji
- Department of Dermatology, University Hospital Münster, Münster, Germany
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10
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Komlosi K, Claris O, Collardeau-Frachon S, Kopp J, Hausser I, Mazereeuw-Hautier J, Jonca N, Zimmer AD, Sanlaville D, Fischer J. Fatal Neonatal DOLK-CDG as a Rare Form of Syndromic Ichthyosis. Front Genet 2021; 12:719624. [PMID: 34956305 PMCID: PMC8693085 DOI: 10.3389/fgene.2021.719624] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/02/2021] [Accepted: 11/02/2021] [Indexed: 11/13/2022] Open
Abstract
Neonatal collodion baby or ichthyosis can pose a diagnostic challenge, and in many cases, only additional organ involvement or the course of the disease will help differentiate between non-syndromic and syndromic forms. Skin abnormalities are described in about 20% of the congenital disorders of glycosylation (CDG). Among those, some rare CDG forms constitute a special group among the syndromic ichthyoses and can initially misdirect the diagnosis towards non-syndromic genodermatosis. DOLK-CDG is such a rare subtype, resulting from a defect in dolichol kinase, in which the congenital skin phenotype (often ichthyosis) is later associated with variable extracutaneous features such as dilatative cardiomyopathy, epilepsy, microcephaly, visual impairment, and hypoglycemia and may lead to a fatal course. We report two neonatal cases of lethal ichthyosis from the same family, with distal digital constrictions and a progressive course leading to multi-organ failure and death. Postmortem trio whole-exome sequencing revealed the compound heterozygous variants NM_014908.3: c.1342G>A, p.(Gly448Arg) and NM_014908.3: c.1558A>G, p.(Thr520Ala) in the DOLK gene in the first affected child, which were confirmed in the affected sibling. Reduced staining with anti-α-Dystroglycan antibody was observed in frozen heart tissue of the second child as an expression of reduced O-mannosylation due to the dolichol kinase deficiency. In addition to the detailed dermatopathological changes, both cases presented hepatic and extrahepatic hemosiderosis on histological examination. Our patients represent an early and fatal form of DOLK-CDG with a striking presentation at birth resembling severe collodion baby. Both cases emphasize the phenotypic variability of glycosylation disorders and the importance to broaden the differential diagnosis of ichthyosis and to actively search for organ involvement in neonates with ichthyosis.
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Affiliation(s)
- Katalin Komlosi
- Institute of Human Genetics, Medical Center, Faculty of Medicine, University of Freiburg, Freiburg, Germany
- *Correspondence: Katalin Komlosi,
| | - Olivier Claris
- Department of Neonatology, Hospices Civils de Lyon, Hôpital Femme Mère Enfant, Bron, France
- Claude Bernard University, Lyon, France
| | - Sophie Collardeau-Frachon
- Hospices Civils de Lyon, Hôpital Femme Mère Enfant, Institut de Pathologie, Bron, France
- Faculté de médecine Lyon Est, Claude Bernard University, Lyon, France
| | - Julia Kopp
- Institute of Human Genetics, Medical Center, Faculty of Medicine, University of Freiburg, Freiburg, Germany
| | - Ingrid Hausser
- Institute of Pathology, Heidelberg University Hospital, Heidelberg, Germany
| | - Juliette Mazereeuw-Hautier
- Dermatology Department, Reference Center for Rare Skin Diseases, CHU Larrey, Université Paul Sabatier, Toulouse, France
| | - Nathalie Jonca
- Infinity, CNRS, Inserm, UPS, Université Toulouse, Toulouse, France
- CHU Toulouse, Hôpital Purpan, Laboratoire de Biologie Cellulaire et Cytologie, Institut Fédératif de Biologie, Toulouse, France
| | - Andreas D. Zimmer
- Institute of Human Genetics, Medical Center, Faculty of Medicine, University of Freiburg, Freiburg, Germany
| | - Damien Sanlaville
- Hospices Civils de Lyon, Hôpital Femme Mère Enfant, Service de Génétique, Bron, France
- Institut Neuromyogène, Université de Lyon, Lyon, France
| | - Judith Fischer
- Institute of Human Genetics, Medical Center, Faculty of Medicine, University of Freiburg, Freiburg, Germany
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11
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Hotz A, Kopp J, Bourrat E, Oji V, Komlosi K, Giehl K, Bouadjar B, Bygum A, Tantcheva-Poor I, Hellström Pigg M, Has C, Yang Z, Irvine AD, Betz RC, Zambruno G, Tadini G, Süßmuth K, Gruber R, Schmuth M, Mazereeuw-Hautier J, Jonca N, Guez S, Brena M, Hernandez-Martin A, van den Akker P, Bolling MC, Hannula-Jouppi K, Zimmer AD, Alter S, Vahlquist A, Fischer J. Meta-Analysis of Mutations in ALOX12B or ALOXE3 Identified in a Large Cohort of 224 Patients. Genes (Basel) 2021; 12:genes12010080. [PMID: 33435499 PMCID: PMC7826849 DOI: 10.3390/genes12010080] [Citation(s) in RCA: 11] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/23/2020] [Revised: 01/04/2021] [Accepted: 01/06/2021] [Indexed: 11/23/2022] Open
Abstract
The autosomal recessive congenital ichthyoses (ARCI) are a nonsyndromic group of cornification disorders that includes lamellar ichthyosis, congenital ichthyosiform erythroderma, and harlequin ichthyosis. To date mutations in ten genes have been identified to cause ARCI: TGM1, ALOX12B, ALOXE3, NIPAL4, CYP4F22, ABCA12, PNPLA1, CERS3, SDR9C7, and SULT2B1. The main focus of this report is the mutational spectrum of the genes ALOX12B and ALOXE3, which encode the epidermal lipoxygenases arachidonate 12-lipoxygenase, i.e., 12R type (12R-LOX), and the epidermis-type lipoxygenase-3 (eLOX3), respectively. Deficiency of 12R-LOX and eLOX3 disrupts the epidermal barrier function and leads to an abnormal epidermal differentiation. The type and the position of the mutations may influence the ARCI phenotype; most patients present with a mild erythrodermic ichthyosis, and only few individuals show severe erythroderma. To date, 88 pathogenic mutations in ALOX12B and 27 pathogenic mutations in ALOXE3 have been reported in the literature. Here, we presented a large cohort of 224 genetically characterized ARCI patients who carried mutations in these genes. We added 74 novel mutations in ALOX12B and 25 novel mutations in ALOXE3. We investigated the spectrum of mutations in ALOX12B and ALOXE3 in our cohort and additionally in the published mutations, the distribution of these mutations within the gene and gene domains, and potential hotspots and recurrent mutations.
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Affiliation(s)
- Alrun Hotz
- Institute of Human Genetics, Medical Center, Faculty of Medicine, University of Freiburg, 79106 Freiburg, Germany; (A.H.); (J.K.); (K.K.); (Z.Y.); (A.D.Z.); (S.A.)
| | - Julia Kopp
- Institute of Human Genetics, Medical Center, Faculty of Medicine, University of Freiburg, 79106 Freiburg, Germany; (A.H.); (J.K.); (K.K.); (Z.Y.); (A.D.Z.); (S.A.)
| | - Emmanuelle Bourrat
- Department of Dermatology, Reference Center for Rare Skin Diseases MAGEC, Saint Louis Hospital AP-HP, 75010 Paris, France;
| | - Vinzenz Oji
- Department of Dermatology and Venereology, Münster University Medical Center, 48149 Münster, Germany; (V.O.); (K.S.)
| | - Katalin Komlosi
- Institute of Human Genetics, Medical Center, Faculty of Medicine, University of Freiburg, 79106 Freiburg, Germany; (A.H.); (J.K.); (K.K.); (Z.Y.); (A.D.Z.); (S.A.)
| | - Kathrin Giehl
- Department of Dermatology and Allergy, University of Munich LMU, 80337 Munich, Germany;
| | - Bakar Bouadjar
- Department of Dermatology, CHU of Bab-El-Oued Algiers, Algiers 16008, Algeria;
| | - Anette Bygum
- Department of Dermatology, Odense University Hospital, 5000 Odense, Denmark;
- Department of Clinical Genetics, Odense University Hospital, 5000 Odense, Denmark
- Clinical Institute, University of Southern Denmark, 5000 Odense, Denmark
| | | | - Maritta Hellström Pigg
- Department of Clinical Genetics, Karolinska University Hospital, 17176 Stockholm, Sweden;
| | - Cristina Has
- Department of Dermatology, Medical Center-University of Freiburg, University of Freiburg, 79104 Freiburg, Germany;
| | - Zhou Yang
- Institute of Human Genetics, Medical Center, Faculty of Medicine, University of Freiburg, 79106 Freiburg, Germany; (A.H.); (J.K.); (K.K.); (Z.Y.); (A.D.Z.); (S.A.)
- Department of Dermatology, Beijing Children’s Hospital, Capital Medical University, National Center for Children’s Health, Beijing 100045, China
| | - Alan D. Irvine
- Dermatology, Children’s Health Ireland and Clinical Medicine, Trinity College Dublin, D12 N512 Dublin, Ireland;
| | - Regina C. Betz
- Institute of Human Genetics, School of Medicine & University Hospital Bonn, University of Bonn, 53127 Bonn, Germany;
| | - Giovanna Zambruno
- Genodermatosis Unit, Genetics and Rare Diseases Research Division, Bambino Gesù Children’s Hospital, IRCCS, 00165 Rome, Italy;
| | - Gianluca Tadini
- Fondazione IRCCS Cà Granda Ospedale Maggiore Policlinico, UOSD Pediatria ad Alta Intensità di Cura, 20122 Milan, Italy; (G.T.); (S.G.); (M.B.)
| | - Kira Süßmuth
- Department of Dermatology and Venereology, Münster University Medical Center, 48149 Münster, Germany; (V.O.); (K.S.)
| | - Robert Gruber
- Department of Dermatology, Venereology and Allergy, Medical University of Innsbruck, 6020 Innsbruck, Austria; (R.G.); (M.S.)
| | - Matthias Schmuth
- Department of Dermatology, Venereology and Allergy, Medical University of Innsbruck, 6020 Innsbruck, Austria; (R.G.); (M.S.)
| | - Juliette Mazereeuw-Hautier
- Reference Center for Rare Skin Diseases, Dermatology Department, CHU Larrey, Université Paul Sabatier, 31000 Toulouse, France;
| | - Natalie Jonca
- Department of Epidermis Differentiation and Rheumatoid Autoimmunity, UMR 1056 Inserm University Toulouse, Place du Dr Baylac, Hôpital Purpan, 31059 Toulouse, France;
| | - Sophie Guez
- Fondazione IRCCS Cà Granda Ospedale Maggiore Policlinico, UOSD Pediatria ad Alta Intensità di Cura, 20122 Milan, Italy; (G.T.); (S.G.); (M.B.)
| | - Michela Brena
- Fondazione IRCCS Cà Granda Ospedale Maggiore Policlinico, UOSD Pediatria ad Alta Intensità di Cura, 20122 Milan, Italy; (G.T.); (S.G.); (M.B.)
| | | | - Peter van den Akker
- Department of Genetics, University Medical Center Groningen, University of Groningen, 9700RB Groningen, The Netherlands;
| | - Maria C. Bolling
- Center for Blistering Diseases, Department of Dermatology, University Medical Center Groningen, University of Groningen, 9700RB Groningen, The Netherlands;
| | - Katariina Hannula-Jouppi
- ERN-Skin Center, Department of Dermatology and Allergology, University of Helsinki and Helsinki University Central Hospital, 00029 HUS Helsinki, Finland;
- Folkhälsan Research Center, Helsinki, Finland and Research Programs Unit, Stem Cells and Metabolism Research Program, University of Helsinki, 00290 Helsinki, Finland
| | - Andreas D. Zimmer
- Institute of Human Genetics, Medical Center, Faculty of Medicine, University of Freiburg, 79106 Freiburg, Germany; (A.H.); (J.K.); (K.K.); (Z.Y.); (A.D.Z.); (S.A.)
| | - Svenja Alter
- Institute of Human Genetics, Medical Center, Faculty of Medicine, University of Freiburg, 79106 Freiburg, Germany; (A.H.); (J.K.); (K.K.); (Z.Y.); (A.D.Z.); (S.A.)
| | - Anders Vahlquist
- Department of Medical Sciences/Dermatology, Uppsala University, SE-751 85 Uppsala, Sweden;
| | - Judith Fischer
- Institute of Human Genetics, Medical Center, Faculty of Medicine, University of Freiburg, 79106 Freiburg, Germany; (A.H.); (J.K.); (K.K.); (Z.Y.); (A.D.Z.); (S.A.)
- Correspondence:
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12
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Endres D, Decher N, Röhr I, Vowinkel K, Domschke K, Komlosi K, Tzschach A, Gläser B, Schiele MA, Runge K, Süß P, Schuchardt F, Nickel K, Stallmeyer B, Rinné S, Schulze-Bahr E, Tebartz van Elst L. New Cav1.2 Channelopathy with High-Functioning Autism, Affective Disorder, Severe Dental Enamel Defects, a Short QT Interval, and a Novel CACNA1C Loss-Of-Function Mutation. Int J Mol Sci 2020; 21:ijms21228611. [PMID: 33203140 PMCID: PMC7696251 DOI: 10.3390/ijms21228611] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/20/2020] [Revised: 11/04/2020] [Accepted: 11/07/2020] [Indexed: 12/12/2022] Open
Abstract
Complex neuropsychiatric-cardiac syndromes can be genetically determined. For the first time, the authors present a syndromal form of short QT syndrome in a 34-year-old German male patient with extracardiac features with predominant psychiatric manifestation, namely a severe form of secondary high-functioning autism spectrum disorder (ASD), along with affective and psychotic exacerbations, and severe dental enamel defects (with rapid wearing off his teeth) due to a heterozygous loss-of-function mutation in the CACNA1C gene (NM_000719.6: c.2399A > C; p.Lys800Thr). This mutation was found only once in control databases; the mutated lysine is located in the Cav1.2 calcium channel, is highly conserved during evolution, and is predicted to affect protein function by most pathogenicity prediction algorithms. L-type Cav1.2 calcium channels are widely expressed in the brain and heart. In the case presented, electrophysiological studies revealed a prominent reduction in the current amplitude without changes in the gating behavior of the Cav1.2 channel, most likely due to a trafficking defect. Due to the demonstrated loss of function, the p.Lys800Thr variant was finally classified as pathogenic (ACMG class 4 variant) and is likely to cause a newly described Cav1.2 channelopathy.
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Affiliation(s)
- Dominique Endres
- Section for Experimental Neuropsychiatry, Department of Psychiatry and Psychotherapy, Medical Center-University of Freiburg, Faculty of Medicine, University of Freiburg, 79104 Freiburg, Germany; (K.R.); (K.N.); (L.T.v.E.)
- Department of Psychiatry and Psychotherapy, Medical Center-University of Freiburg, Faculty of Medicine, University of Freiburg, 79104 Freiburg, Germany; (K.D.); (M.A.S.)
- Correspondence: ; Tel.: +49-761-270-66360
| | - Niels Decher
- Institute for Physiology and Pathophysiology, Vegetative Physiology and Marburg Center for Mind, Brain and Behavior-Philipps-University Marburg, 35037 Marburg, Germany; (N.D.); (I.R.); (K.V.); (S.R.)
| | - Isabell Röhr
- Institute for Physiology and Pathophysiology, Vegetative Physiology and Marburg Center for Mind, Brain and Behavior-Philipps-University Marburg, 35037 Marburg, Germany; (N.D.); (I.R.); (K.V.); (S.R.)
| | - Kirsty Vowinkel
- Institute for Physiology and Pathophysiology, Vegetative Physiology and Marburg Center for Mind, Brain and Behavior-Philipps-University Marburg, 35037 Marburg, Germany; (N.D.); (I.R.); (K.V.); (S.R.)
| | - Katharina Domschke
- Department of Psychiatry and Psychotherapy, Medical Center-University of Freiburg, Faculty of Medicine, University of Freiburg, 79104 Freiburg, Germany; (K.D.); (M.A.S.)
- Center for Basics in Neuromodulation, Faculty of Medicine, University of Freiburg, 79106 Freiburg, Germany
| | - Katalin Komlosi
- Institute of Human Genetics, Medical Center-University of Freiburg, Faculty of Medicine, University of Freiburg, 79106 Freiburg, Germany; (K.K.); (A.T.); (B.G.)
| | - Andreas Tzschach
- Institute of Human Genetics, Medical Center-University of Freiburg, Faculty of Medicine, University of Freiburg, 79106 Freiburg, Germany; (K.K.); (A.T.); (B.G.)
| | - Birgitta Gläser
- Institute of Human Genetics, Medical Center-University of Freiburg, Faculty of Medicine, University of Freiburg, 79106 Freiburg, Germany; (K.K.); (A.T.); (B.G.)
| | - Miriam A. Schiele
- Department of Psychiatry and Psychotherapy, Medical Center-University of Freiburg, Faculty of Medicine, University of Freiburg, 79104 Freiburg, Germany; (K.D.); (M.A.S.)
| | - Kimon Runge
- Section for Experimental Neuropsychiatry, Department of Psychiatry and Psychotherapy, Medical Center-University of Freiburg, Faculty of Medicine, University of Freiburg, 79104 Freiburg, Germany; (K.R.); (K.N.); (L.T.v.E.)
- Department of Psychiatry and Psychotherapy, Medical Center-University of Freiburg, Faculty of Medicine, University of Freiburg, 79104 Freiburg, Germany; (K.D.); (M.A.S.)
| | - Patrick Süß
- Department of Molecular Neurology, University Hospital Erlangen, 91054 Erlangen, Germany;
| | - Florian Schuchardt
- Department of Neurology, Medical Center-University of Freiburg, Faculty of Medicine, University of Freiburg, 79106 Freiburg, Germany;
| | - Kathrin Nickel
- Section for Experimental Neuropsychiatry, Department of Psychiatry and Psychotherapy, Medical Center-University of Freiburg, Faculty of Medicine, University of Freiburg, 79104 Freiburg, Germany; (K.R.); (K.N.); (L.T.v.E.)
- Department of Psychiatry and Psychotherapy, Medical Center-University of Freiburg, Faculty of Medicine, University of Freiburg, 79104 Freiburg, Germany; (K.D.); (M.A.S.)
| | - Birgit Stallmeyer
- Institute for Genetics of Heart Diseases, Department of Cardiovascular Medicine, University Hospital Münster, 48149 Münster, Germany; (B.S.); (E.S.-B.)
| | - Susanne Rinné
- Institute for Physiology and Pathophysiology, Vegetative Physiology and Marburg Center for Mind, Brain and Behavior-Philipps-University Marburg, 35037 Marburg, Germany; (N.D.); (I.R.); (K.V.); (S.R.)
| | - Eric Schulze-Bahr
- Institute for Genetics of Heart Diseases, Department of Cardiovascular Medicine, University Hospital Münster, 48149 Münster, Germany; (B.S.); (E.S.-B.)
| | - Ludger Tebartz van Elst
- Section for Experimental Neuropsychiatry, Department of Psychiatry and Psychotherapy, Medical Center-University of Freiburg, Faculty of Medicine, University of Freiburg, 79104 Freiburg, Germany; (K.R.); (K.N.); (L.T.v.E.)
- Department of Psychiatry and Psychotherapy, Medical Center-University of Freiburg, Faculty of Medicine, University of Freiburg, 79104 Freiburg, Germany; (K.D.); (M.A.S.)
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Komlosi K, Gläser S, Kopp J, Hotz A, Alter S, Zimmer AD, Beger C, Heinzel S, Schmidt C, Fischer J. Neonatal presentation of COG6-CDG with prominent skin phenotype. JIMD Rep 2020; 55:51-58. [PMID: 32905044 PMCID: PMC7463048 DOI: 10.1002/jmd2.12154] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/21/2020] [Revised: 07/15/2020] [Accepted: 07/17/2020] [Indexed: 12/14/2022] Open
Abstract
Many of the genetic childhood disorders leading to death in the perinatal period follow autosomal recessive inheritance and bear specific challenges for genetic counseling and prenatal diagnostics. Often, affected children die before a genetic diagnosis can be established, thereby precluding targeted carrier testing in parents and prenatal or preimplantation genetic diagnosis in further pregnancies. The clinical phenotype of congenital disorders of glycosylation (CDG) is very heterogeneous and ranges from relatively mild symptoms to severe multisystem dysfunction and even a fatal course. A very rare subtype, COG6-CDG, is caused by deficiency of subunit 6 of the conserved oligomeric Golgi complex and is usually characterized by growth retardation, developmental delay, microcephaly, liver and gastrointestinal disease, joint contractures and episodic fever. It has been proposed that a distinctive feature of COG6-CDG can be ectodermal signs such as hypohidrosis/hyperthermia, hyperkeratosis and tooth anomalies. In a Greek family, who had lost two children in the neonatal period, with prominent skin features initially resembling restrictive dermopathy, severe arthrogryposis, respiratory insufficiency and a rapid fatal course trio whole-exome sequencing revealed the homozygous nonsense mutation c.511C>T, p.(Arg171*) in the COG6 gene. Skin manifestations such as dry skin and hyperkeratosis have been reported in only five out of the 21 reported COG6-CDG cases so far, including two patients with the c.511C>T variant in COG6 but with milder ectodermal symptoms. Our case adds to the phenotypic spectrum of COG6-CDG with prominent ectodermal manifestations at birth and underlines the importance of considering CDG among the possible causes for congenital syndromic genodermatoses.
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Affiliation(s)
- Katalin Komlosi
- Institute of Human Genetics, Medical CenterUniversity of Freiburg, Faculty of Medicine, University of FreiburgFreiburgGermany
| | - Selina Gläser
- Institute of Human Genetics, Medical CenterUniversity of Freiburg, Faculty of Medicine, University of FreiburgFreiburgGermany
| | - Julia Kopp
- Institute of Human Genetics, Medical CenterUniversity of Freiburg, Faculty of Medicine, University of FreiburgFreiburgGermany
| | - Alrun Hotz
- Institute of Human Genetics, Medical CenterUniversity of Freiburg, Faculty of Medicine, University of FreiburgFreiburgGermany
| | - Svenja Alter
- Institute of Human Genetics, Medical CenterUniversity of Freiburg, Faculty of Medicine, University of FreiburgFreiburgGermany
| | - Andreas D. Zimmer
- Institute of Human Genetics, Medical CenterUniversity of Freiburg, Faculty of Medicine, University of FreiburgFreiburgGermany
| | - Carmela Beger
- Human Genetics PraxisKrone LaboratoryBielefeldGermany
| | - Stefan Heinzel
- Neonatology Unit, Department of PediatricsChildren's Center Bethel, Evangelical Hospital BethelBielefeldGermany
| | | | - Judith Fischer
- Institute of Human Genetics, Medical CenterUniversity of Freiburg, Faculty of Medicine, University of FreiburgFreiburgGermany
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Arash-Kaps L, Komlosi K, Seegräber M, Diederich S, Paschke E, Amraoui Y, Beblo S, Dieckmann A, Smitka M, Hennermann JB. The Clinical and Molecular Spectrum of GM1 Gangliosidosis. J Pediatr 2019; 215:152-157.e3. [PMID: 31761138 DOI: 10.1016/j.jpeds.2019.08.016] [Citation(s) in RCA: 16] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/15/2019] [Revised: 07/23/2019] [Accepted: 08/07/2019] [Indexed: 01/10/2023]
Abstract
OBJECTIVE To evaluate the clinical presentation of patients with GM1 gangliosidosis and to determine whether specific clinical or biochemical signs could lead to a prompt diagnosis. STUDY DESIGN We retrospectively analyzed clinical, biochemical, and genetic data of 22 patients with GM1 gangliosidosis from 5 metabolic centers in Germany and Austria. RESULTS Eight patients were classified as infantile, 11 as late-infantile, and 3 as juvenile form. Delay of diagnosis was 6 ± 2.6 months in the infantile, 2.6 ± 3.79 years in the late-infantile, and 14 ± 3.48 years in the juvenile form. Coarse facial features, cherry red spots, and visceromegaly occurred only in patients with the infantile form. Patients with the late-infantile and juvenile forms presented with variable neurologic symptoms. Seventeen patients presented with dystonia and 14 with dysphagia. Laboratory analysis revealed an increased ASAT concentration (13/20), chitotriosidase activity (12/15), and pathologic urinary oligosaccharides (10/19). Genotype analyses revealed 23 causative or likely causative mutations in 19 patients, 7 of them being novel variants. In the majority, a clear genotype-phenotype correlation was found. CONCLUSIONS Diagnosis of GM1 gangliosidosis often is delayed, especially in patients with milder forms of the disease. GM1 gangliosidosis should be considered in patients with progressive neurodegeneration and spastic-dystonic movement disorders, even in the absence of visceral symptoms or cherry red spots. ASAT serum concentrations and chitotriosidase activity may be of value in screening for GM1 gangliosidosis.
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Affiliation(s)
- Laila Arash-Kaps
- Villa Metabolica, Department of Pediatric and University Medical Center Mainz, Germany
| | - Katalin Komlosi
- Adolescent Medicine, and Institute of Human Genetics, University Medical Center Mainz, Germany
| | - Marlene Seegräber
- Villa Metabolica, Department of Pediatric and University Medical Center Mainz, Germany
| | - Stefan Diederich
- Adolescent Medicine, and Institute of Human Genetics, University Medical Center Mainz, Germany
| | | | - Yasmina Amraoui
- Villa Metabolica, Department of Pediatric and University Medical Center Mainz, Germany
| | - Skadi Beblo
- Department of Women and Child Health, Hospital for Children and Adolescents, Centre for Paediatric Research Leipzig (CPL), University Hospitals, University of Leipzig, Leipzig
| | - Andrea Dieckmann
- Center for Inborn Metabolic Disorders, Department of Neuropediatrics, Jena University Hospital, Jena
| | - Martin Smitka
- Neuropediatric Department, Carl Gustav Carus University Children's Hospital Dresden, Germany
| | - Julia B Hennermann
- Villa Metabolica, Department of Pediatric and University Medical Center Mainz, Germany
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15
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Emmert S, Iben S, Fischer J, Komlosi K, Betz RC, Frank J J, Has C. Ein neues Forum für seltene Hauterkrankungen. J Dtsch Dermatol Ges 2019; 17:672-673. [DOI: 10.1111/ddg.13863] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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16
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Endres D, Süß P, Maier SJ, Friedel E, Nickel K, Ziegler C, Fiebich BL, Glocker FX, Stock F, Egger K, Lange T, Dacko M, Venhoff N, Erny D, Doostkam S, Komlosi K, Domschke K, Tebartz van Elst L. New Variant of MELAS Syndrome With Executive Dysfunction, Heteroplasmic Point Mutation in the MT-ND4 Gene (m.12015T>C; p.Leu419Pro) and Comorbid Polyglandular Autoimmune Syndrome Type 2. Front Immunol 2019; 10:412. [PMID: 30949164 PMCID: PMC6437310 DOI: 10.3389/fimmu.2019.00412] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/24/2018] [Accepted: 02/15/2019] [Indexed: 11/13/2022] Open
Abstract
Background: Mitochondrial diseases are caused by dysfunctions in mitochondrial metabolic pathways. MELAS syndrome is one of the most frequent mitochondrial disorders; it is characterized by encephalopathy, myopathy, lactic acidosis, and stroke-like episodes. Typically, it is associated with a point mutation with an adenine-to-guanine transition at position 3243 of the mitochondrial DNA (mtDNA; m.3243A>G) in the mitochondrially encoded tRNA leucine 1 (MT-TL1) gene. Other point mutations are possible and the association with polyglandular autoimmune syndrome type 2 has not yet been described. Case presentation: We present the case of a 25-year-old female patient with dysexecutive syndrome, muscular fatigue, and continuous headache. Half a year ago, she fought an infection-triggered Addison crisis. As the disease progressed, she had two epileptic seizures and stroke-like episodes with hemiparesis on the right side. Cerebral magnetic resonance imaging showed a substance defect of the parieto-occipital left side exceeding the vascular territories with a lactate peak. The lactate ischemia test was clearly positive, and a muscle biopsy showed single cytochrome c oxidase-negative muscle fibers. Genetic testing of blood mtDNA revealed a heteroplasmic base exchange mutation in the mitochondrially encoded NADH:ubiquinone oxidoreductase core subunit 4 (MT-ND4) gene (m.12015T>C; p.Leu419Pro; heteroplasmy level in blood 12%, in muscle tissue: 15%). The patient suffered from comorbid autoimmune polyglandular syndrome type 2 with Hashimoto's thyroiditis, Addison's disease, and autoimmune gastritis. In addition, we found increased anti-glutamic acid decarboxylase 65, anti-partial cell, anti-intrinsic factor, and anti-nuclear antibodies. Conclusion: We present an atypical case of MELAS syndrome with predominant symptoms of a dysexecutive syndrome, two stroke-like episodes, and fast-onset fatigue. The symptoms were associated with a not yet described base and aminoacid exchange mutation in the MT-ND4 gene (m.12015T>C to p.Leu419Pro). The resulting changed protein complex in our patient is part of the respiratory chain multicomplex I and might be the reason for the mitochondriopathy. However, different simulations for pathogenetic relevance are contradictory and rather speak for a benign variant. To our knowledge this case report is the first reporting MELAS syndrome with comorbid polyglandular autoimmune syndrome type 2. Screening for autoimmune alterations in those patients is important to prevent damage to end organs.
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Affiliation(s)
- Dominique Endres
- Section for Experimental Neuropsychiatry, Department of Psychiatry and Psychotherapy, Medical Center-University of Freiburg, Faculty of Medicine, University of Freiburg, Freiburg, Germany.,Department of Psychiatry and Psychotherapy, Medical Center-University of Freiburg, Faculty of Medicine, University of Freiburg, Freiburg, Germany
| | - Patrick Süß
- Section for Experimental Neuropsychiatry, Department of Psychiatry and Psychotherapy, Medical Center-University of Freiburg, Faculty of Medicine, University of Freiburg, Freiburg, Germany.,Department of Psychiatry and Psychotherapy, Medical Center-University of Freiburg, Faculty of Medicine, University of Freiburg, Freiburg, Germany
| | - Simon J Maier
- Section for Experimental Neuropsychiatry, Department of Psychiatry and Psychotherapy, Medical Center-University of Freiburg, Faculty of Medicine, University of Freiburg, Freiburg, Germany.,Department of Psychiatry and Psychotherapy, Medical Center-University of Freiburg, Faculty of Medicine, University of Freiburg, Freiburg, Germany
| | - Evelyn Friedel
- Section for Experimental Neuropsychiatry, Department of Psychiatry and Psychotherapy, Medical Center-University of Freiburg, Faculty of Medicine, University of Freiburg, Freiburg, Germany.,Department of Psychiatry and Psychotherapy, Medical Center-University of Freiburg, Faculty of Medicine, University of Freiburg, Freiburg, Germany
| | - Kathrin Nickel
- Section for Experimental Neuropsychiatry, Department of Psychiatry and Psychotherapy, Medical Center-University of Freiburg, Faculty of Medicine, University of Freiburg, Freiburg, Germany.,Department of Psychiatry and Psychotherapy, Medical Center-University of Freiburg, Faculty of Medicine, University of Freiburg, Freiburg, Germany
| | - Christiane Ziegler
- Department of Psychiatry and Psychotherapy, Medical Center-University of Freiburg, Faculty of Medicine, University of Freiburg, Freiburg, Germany
| | - Bernd L Fiebich
- Department of Psychiatry and Psychotherapy, Medical Center-University of Freiburg, Faculty of Medicine, University of Freiburg, Freiburg, Germany
| | - Franz X Glocker
- Department of Neurology, Medical Center-University of Freiburg, Faculty of Medicine, University of Freiburg, Freiburg, Germany
| | - Friedrich Stock
- Institute of Human Genetics, University Hospital Muenster, Muenster, Germany
| | - Karl Egger
- Department of Neuroradiology, Medical Center-University of Freiburg, Faculty of Medicine, University of Freiburg, Freiburg, Germany
| | - Thomas Lange
- Department of Radiology, Medical Physics, Medical Center-University of Freiburg, Faculty of Medicine, University of Freiburg, Freiburg, Germany
| | - Michael Dacko
- Department of Radiology, Medical Physics, Medical Center-University of Freiburg, Faculty of Medicine, University of Freiburg, Freiburg, Germany
| | - Nils Venhoff
- Department of Rheumatology and Clinical Immunology, Medical Center-University of Freiburg, Faculty of Medicine, University of Freiburg, Freiburg, Germany
| | - Daniel Erny
- Institute of Neuropathology, Medical Center-University of Freiburg, Faculty of Medicine, University of Freiburg, Freiburg, Germany.,Berta-Ottenstein-Programme, Faculty of Medicine, University of Freiburg, Freiburg, Germany
| | - Soroush Doostkam
- Institute of Neuropathology, Medical Center-University of Freiburg, Faculty of Medicine, University of Freiburg, Freiburg, Germany
| | - Katalin Komlosi
- Institute of Human Genetics, Medical Center-University of Freiburg, Faculty of Medicine, University of Freiburg, Freiburg, Germany
| | - Katharina Domschke
- Department of Psychiatry and Psychotherapy, Medical Center-University of Freiburg, Faculty of Medicine, University of Freiburg, Freiburg, Germany
| | - Ludger Tebartz van Elst
- Section for Experimental Neuropsychiatry, Department of Psychiatry and Psychotherapy, Medical Center-University of Freiburg, Faculty of Medicine, University of Freiburg, Freiburg, Germany.,Department of Psychiatry and Psychotherapy, Medical Center-University of Freiburg, Faculty of Medicine, University of Freiburg, Freiburg, Germany
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17
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Gucev Z, Tasic V, Bogevska I, Laban N, Saveski A, Polenakovic M, Plaseska-Karanfilska D, Komlosi K, Winter J, Schweiger S, Nishimura G, Spranger J, Bartsch O. Heterotopic ossifications and Charcot joints: Congenital insensitivity to pain with anhidrosis (CIPA) and a novel NTRK1 gene mutation. Eur J Med Genet 2019; 63:103613. [PMID: 30677517 DOI: 10.1016/j.ejmg.2019.01.003] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/21/2018] [Revised: 01/11/2019] [Accepted: 01/12/2019] [Indexed: 10/27/2022]
Abstract
Congenital insensitivity to pain with anhidrosis (CIPA), also known as hereditary sensory and autonomic neuropathy type IV (HSAN-IV), is a rare and severe autosomal recessive disorder. We report on an adult female patient whose clinical findings during childhood were not recognized as CIPA. There was neither complete anhidrosis nor a recognizable sensitivity to heat. Tumorlike swellings of many joints and skeletal signs of Charcot neuropathy developed in adolescence which, together with a history of self-mutilation, led to a clinical suspicion of CIPA confirmed by identification of a novel homozygous variant c.1795G > T in the NTRK1 gene in blood lymphocytes. Both parents were heterozygous for the mutation. The variant predicts a premature stop codon (p.Gly599Ter) and thus represents a pathogenic variant; the first reported in the Southeastern European population.
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Affiliation(s)
| | | | | | | | | | | | | | - Katalin Komlosi
- Institute of Human Genetics, Medical Center of the Johannes Gutenberg University Mainz, University of Mainz, Germany
| | - Jennifer Winter
- Institute of Human Genetics, Medical Center of the Johannes Gutenberg University Mainz, University of Mainz, Germany
| | - Susann Schweiger
- Institute of Human Genetics, Medical Center of the Johannes Gutenberg University Mainz, University of Mainz, Germany
| | - Gen Nishimura
- Intractable Disease Center, Saitama Medical University Hospital, Saitama, Japan
| | | | - Oliver Bartsch
- Institute of Human Genetics, Medical Center of the Johannes Gutenberg University Mainz, University of Mainz, Germany
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18
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Matyas P, Postyeni E, Komlosi K, Szalai R, Bene J, Magyari L, Melegh B, Hadzsiev K. Age-Related Hearing Impairment Associated NAT2, GRM7, GRHL2 Susceptibility Gene Polymorphisms and Haplotypes in Roma and Hungarian Populations. Pathol Oncol Res 2018; 25:1349-1355. [PMID: 29455378 DOI: 10.1007/s12253-018-0388-6] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/29/2017] [Accepted: 02/05/2018] [Indexed: 10/18/2022]
Abstract
Age-related hearing impairment (ARHI) is the most frequent sensory disease in the elderly, which is caused by an interaction between genetic and environmental factors. Here we examined the ethnic differences, allele and genotype frequencies of the NAT2, GRM7, and GRHL2 genes pooled samples of healthy Hungarian and healthy and hearing impaired Roma people. Study populations of healthy Hungarian and Roma subjects were characterized for the rs1799930 NAT2, rs11928865 GRM7, rs10955255, rs13263539, and rs1981361 GRHL2 polymorphisms and deaf Roma subjects were characterized for the rs1799930 NAT2, rs13263539, and rs1981361 GRHL2 using a PCR-RFLP method. We found significant differences in minor allele frequencies for GRHL2 rs13263539 and rs1981361 polymorphism between healthy Roma and Hungarian samples (37.9% vs. 51.0% and 43.6% vs. 56.2%, respectively; p < 0.05). The differences of homozygous genotype of GRHL2 rs13263539 and rs1981361 variants, values were also significantly different (13.0% vs. 25.3% and 16.5 vs. 32.3%; p < 0.05). The NAT2 rs1799930 homozygous genotype was 14.0% in healthy Romas and 7.7% in Hungarians, while the minor A allele frequency was 38.0% and 26.7% in Roma and Hungarian population, respectively (p < 0.05). Furthermore, the frequency of GGT, GAC and GAT haplotypes was significantly higher in the Hungarian population than in healthy Roma (1.87 vs. 4.47%, 0.91 vs. 2.07% and 1.15 vs. 5.51%, respectively; p < 0.008). Present study revealed significant interethnic differences in allele polymorphisms of NAT2, GRM7 and GRHL2 exhibit quite marked ethnic differences in Roma populations that might have important implications for the preventive and therapeutic treatments in this population.
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Affiliation(s)
- Petra Matyas
- Department of Medical Genetics, University of Pecs, Medical School, Szigeti 12, Pecs, H-7624, Hungary.,Human Genetic and Pharmacogenomic Research Group, Janos Szentagothai Research Centre, Ifjusag 20, Pecs, H-7624, Hungary
| | - Etelka Postyeni
- Department of Medical Genetics, University of Pecs, Medical School, Szigeti 12, Pecs, H-7624, Hungary.,Human Genetic and Pharmacogenomic Research Group, Janos Szentagothai Research Centre, Ifjusag 20, Pecs, H-7624, Hungary
| | - Katalin Komlosi
- Department of Medical Genetics, University of Pecs, Medical School, Szigeti 12, Pecs, H-7624, Hungary.,Human Genetic and Pharmacogenomic Research Group, Janos Szentagothai Research Centre, Ifjusag 20, Pecs, H-7624, Hungary
| | - Renata Szalai
- Department of Medical Genetics, University of Pecs, Medical School, Szigeti 12, Pecs, H-7624, Hungary.,Human Genetic and Pharmacogenomic Research Group, Janos Szentagothai Research Centre, Ifjusag 20, Pecs, H-7624, Hungary
| | - Judit Bene
- Department of Medical Genetics, University of Pecs, Medical School, Szigeti 12, Pecs, H-7624, Hungary.,Human Genetic and Pharmacogenomic Research Group, Janos Szentagothai Research Centre, Ifjusag 20, Pecs, H-7624, Hungary
| | - Lili Magyari
- Department of Medical Genetics, University of Pecs, Medical School, Szigeti 12, Pecs, H-7624, Hungary.,Human Genetic and Pharmacogenomic Research Group, Janos Szentagothai Research Centre, Ifjusag 20, Pecs, H-7624, Hungary
| | - Bela Melegh
- Department of Medical Genetics, University of Pecs, Medical School, Szigeti 12, Pecs, H-7624, Hungary. .,Human Genetic and Pharmacogenomic Research Group, Janos Szentagothai Research Centre, Ifjusag 20, Pecs, H-7624, Hungary.
| | - Kinga Hadzsiev
- Department of Medical Genetics, University of Pecs, Medical School, Szigeti 12, Pecs, H-7624, Hungary.,Human Genetic and Pharmacogenomic Research Group, Janos Szentagothai Research Centre, Ifjusag 20, Pecs, H-7624, Hungary
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19
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Papp E, Havasi V, Bene J, Komlosi K, Czopf L, Magyar E, Feher C, Feher G, Horvath B, Marton Z, Alexy T, Habon T, Szabo L, Toth K, Melegh B. Glycoprotein IIIA Gene (PIA) Polymorphism and Aspirin Resistance: Is There Any Correlation? Ann Pharmacother 2017; 39:1013-8. [PMID: 15840736 DOI: 10.1345/aph.1e227] [Citation(s) in RCA: 48] [Impact Index Per Article: 6.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022] Open
Abstract
BACKGROUND:Platelet glycoprotein (GP) IIb/IIIa receptors play an inevitable role in platelet aggregation. The GP IIIa gene is polymorphic ( PIA1/PIA2) and the presence of a PIA2 allele might be associated with an increased risk for acute coronary syndrome (ACS).OBJECTIVE:To examine the prevalence of the PIA2 allele in patients with ACS and in subjects with or without aspirin resistance.METHODS:The prevalence of the PIA2 allele was assessed in 158 patients with ACS and PIA2 compared with its prevalence in 199 healthy volunteers. The antiplatelet efficacy of aspirin was examined in all patients with ACS, as well as in 69 individuals who had suffered ischemic stroke and in 58 high-risk subjects without any known ischemic vascular events.RESULTS:PIA2 prevalence was significantly higher in patients with ACS (59/158) than in the control group (51/199; p < 0.05). Carriers of the PIA2 allele had a significantly higher risk of developing ACS, even after an adjustment to the risk factors (OR 5.74; 95% CI 1.75 to 18.8; p = 0.004). The occurrence of the PIA2 allele was significantly higher among patients with aspirin resistance than in subjects who demonstrated an appropriate response to the drug (allele frequencies, 0.21 vs 0.14; p < 0.05). All patients homozygous for the PIA2 allele had an inadequate platelet response to aspirin.CONCLUSIONS:Our results support the hypothesis that carriers of the PIA2 allele might have an increased risk for ACS. PIA2 homozygosity was associated with an inadequate response to aspirin therapy. Our data further suggest that patients with PIA2 allele homozygosity might benefit from antiplatelet therapy based on adenosine diphosphate antagonists throughout secondary treatment for prevention of ACS.
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Affiliation(s)
- Elod Papp
- First Department of Medicine, School of Medicine, University of Pecs, Pecs, Hungary.
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Komlosi K, Sólyom A, Beck M. The Role of Next-Generation Sequencing in the Diagnosis of Lysosomal Storage Disorders. Journal of Inborn Errors of Metabolism and Screening 2016. [DOI: 10.1177/2326409816669376] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022] Open
Affiliation(s)
- Katalin Komlosi
- Institute of Human Genetics, University Medical Center, Johannes Gutenberg University Mainz, Mainz, Germany
- Institute of Medical Genetics, University of Pecs, Hungary
| | | | - Michael Beck
- Institute of Human Genetics, University Medical Center, Johannes Gutenberg University Mainz, Mainz, Germany
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21
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Hadzsiev K, Komlosi K, Czako M, Duga B, Szalai R, Szabo A, Postyeni E, Szabo T, Kosztolanyi G, Melegh B. Kleefstra syndrome in Hungarian patients: additional symptoms besides the classic phenotype. Mol Cytogenet 2016; 9:22. [PMID: 26918030 PMCID: PMC4766673 DOI: 10.1186/s13039-016-0231-2] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/21/2015] [Accepted: 02/19/2016] [Indexed: 11/20/2022] Open
Abstract
Background Kleefstra syndrome is a rare genetic disorder, with core phenotypic features encompassing developmental delay/intellectual disability, characteristic facial features – brachy(micro)cephaly, unusual shaped eyebrows, flat face with hypertelorism, short nose with anteverted nostrils, thickened lower lip, carpmouth with macroglossia - and childhood hypotonia. Some additional symptoms are observed in different percentage of the patients. Epilepsy is common symptom as well. The underlying cause of the syndrome is a submicroscopic deletion in the chromosomal region 9q34.3 or disruption of the euchromatin histone methyl transferase 1. Case presentation We describe two Hungarian Kleefstra syndrome patients, one with the classic phenotype of the syndrome, the diagnosis was confirmed by subtelomeric FISH. Meanwhile in our second patient beside the classic phenotype a new symptom – abnormal antiepileptic drug metabolic response – could be observed. Subtelomere FISH confirmed the 9q34.3 terminal deletion. Because of the abnormal drug metabolism in our second patient, we performed array CGH analysis as well searching for other rearrangements. Array CGH analysis indicated a large – 1.211 Mb -, deletion only in the 9q subtelomeric region with breakpoints ch9:139,641,471-140,852,911. Conclusions This is the first report on Kleefstra syndrome in patients describing a classical and a complex phenotype involving altered drug metabolism.
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Affiliation(s)
- Kinga Hadzsiev
- Department of Medical Genetics, Clinical Center, University of Pecs, Szigeti 12, H-7624 Pecs, Hungary ; Szentagothai Research Center, University of Pecs, Ifjusag 20, H-7624 Pecs, Hungary
| | - Katalin Komlosi
- Department of Medical Genetics, Clinical Center, University of Pecs, Szigeti 12, H-7624 Pecs, Hungary ; Szentagothai Research Center, University of Pecs, Ifjusag 20, H-7624 Pecs, Hungary
| | - Marta Czako
- Department of Medical Genetics, Clinical Center, University of Pecs, Szigeti 12, H-7624 Pecs, Hungary ; Szentagothai Research Center, University of Pecs, Ifjusag 20, H-7624 Pecs, Hungary
| | - Balazs Duga
- Department of Medical Genetics, Clinical Center, University of Pecs, Szigeti 12, H-7624 Pecs, Hungary ; Szentagothai Research Center, University of Pecs, Ifjusag 20, H-7624 Pecs, Hungary
| | - Renata Szalai
- Department of Medical Genetics, Clinical Center, University of Pecs, Szigeti 12, H-7624 Pecs, Hungary ; Szentagothai Research Center, University of Pecs, Ifjusag 20, H-7624 Pecs, Hungary
| | - Andras Szabo
- Department of Medical Genetics, Clinical Center, University of Pecs, Szigeti 12, H-7624 Pecs, Hungary
| | - Etelka Postyeni
- Department of Medical Genetics, Clinical Center, University of Pecs, Szigeti 12, H-7624 Pecs, Hungary
| | - Titanilla Szabo
- Department of Medical Genetics, Clinical Center, University of Pecs, Szigeti 12, H-7624 Pecs, Hungary
| | - Gyorgy Kosztolanyi
- Department of Medical Genetics, Clinical Center, University of Pecs, Szigeti 12, H-7624 Pecs, Hungary ; Szentagothai Research Center, University of Pecs, Ifjusag 20, H-7624 Pecs, Hungary
| | - Bela Melegh
- Department of Medical Genetics, Clinical Center, University of Pecs, Szigeti 12, H-7624 Pecs, Hungary ; Szentagothai Research Center, University of Pecs, Ifjusag 20, H-7624 Pecs, Hungary
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22
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Remenyi V, Inczedy-Farkas G, Komlosi K, Horvath R, Maasz A, Janicsek I, Pentelenyi K, Gal A, Karcagi V, Melegh B, Molnar MJ. Retrospective assessment of the most common mitochondrial DNA mutations in a large Hungarian cohort of suspect mitochondrial cases. Mitochondrial DNA 2015; 26:572-8. [PMID: 24438288 DOI: 10.3109/19401736.2013.878901] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
Abstract
Prevalence estimations for mitochondrial disorders still vary widely and only few epidemiologic studies have been carried out so far. With the present work we aim to give a comprehensive overview about frequencies of the most common mitochondrial mutations in Hungarian patients. A total of 1328 patients were tested between 1999 and 2012. Among them, 882 were screened for the m.3243A > G, m.8344A > G, m.8993T > C/G mutations and deletions, 446 for LHON primary mutations. The mutation frequency in our cohort was 2.61% for the m.3243A > G, 1.47% for the m.8344A > G, 17.94% for Leber's Hereditary Optic Neuropathy (m.3460G > A, m.11778G > A, m.14484T > C) and 0.45% for the m.8993T > C/G substitutions. Single mtDNA deletions were detected in 14.97%, while multiple deletions in 6.01% of the cases. The mutation frequency in Hungarian patients suggestive of mitochondrial disease was similar to other Caucasian populations. Further retrospective studies of different populations are needed in order to accurately assess the importance of mitochondrial diseases and manage these patients.
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Affiliation(s)
- Viktoria Remenyi
- Institute of Genomic Medicine and Rare Disorders, Semmelweis University , Budapest , Hungary
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23
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Szabo A, Czako M, Hadzsiev K, Duga B, Komlosi K, Melegh B. Partial tetrasomy of the proximal long arm of chromosome 15 in two patients: the significance of the gene dosage in terms of phenotype. Mol Cytogenet 2015; 8:41. [PMID: 26110020 PMCID: PMC4479342 DOI: 10.1186/s13039-015-0137-4] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/27/2015] [Accepted: 04/21/2015] [Indexed: 11/10/2022] Open
Abstract
Background Large amounts of low copy number repeats in the 15q11.2q13.3 chromosomal region increase the possibility of misalignments and unequal crossover during meiosis in this region, leading to deletions, duplications, triplications and supernumerary chromosomes. Most of the reported cases with epilepsy, autism and Prader-Willi/Angelman syndrome are in association with rearrangements of the proximal long arm of chromosome 15. Results Here we report the first two unrelated Hungarian patients with the same epileptic and dysmorphic features, who were investigated by array comparative genomic hybridization (array CGH). By G-banded karyotype followed by FISH and array CGH we could detect partial tetrasomy of the 15q11.2q13.3 chromosomal region, supporting proximal 15q duplication syndrome. Findings of the array CGH gave fully explanation of the phenotypic features of these patients, including epileptic seizures, delayed development, hyperactivity and craniofacial dysmorphic signs. Besides the described features of isodicentric (15) (idic(15)) syndrome Patient 1. suffered from bigeminic extrasystoles and had postnatal growth retardation, which had been published only in a few articles. Conclusions Dosage effect of some genes in the concerned genomic region is known, but several genes have no evidence to have dosage dependence. Our results expanded the previous literature data. We assume dosage dependence in the case of CHRNA7 and OTUD7A, which might be involved in growth regulation. On the other hand increased dosage of the KLF13 gene seems to have no direct causal relationship with heart morphology. The genomic environment of the affected genes may be responsible for the observed phenotype. Electronic supplementary material The online version of this article (doi:10.1186/s13039-015-0137-4) contains supplementary material, which is available to authorized users.
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Affiliation(s)
- Andras Szabo
- Department of Medical Genetics, University of Pecs, Szigeti 12, H-7624 Pecs, Hungary ; Szentagothai Research Centre, Ifjusag 20, H-7624 Pecs, Hungary
| | - Marta Czako
- Department of Medical Genetics, University of Pecs, Szigeti 12, H-7624 Pecs, Hungary ; Szentagothai Research Centre, Ifjusag 20, H-7624 Pecs, Hungary
| | - Kinga Hadzsiev
- Department of Medical Genetics, University of Pecs, Szigeti 12, H-7624 Pecs, Hungary ; Szentagothai Research Centre, Ifjusag 20, H-7624 Pecs, Hungary
| | - Balazs Duga
- Department of Medical Genetics, University of Pecs, Szigeti 12, H-7624 Pecs, Hungary ; Szentagothai Research Centre, Ifjusag 20, H-7624 Pecs, Hungary
| | - Katalin Komlosi
- Department of Medical Genetics, University of Pecs, Szigeti 12, H-7624 Pecs, Hungary ; Szentagothai Research Centre, Ifjusag 20, H-7624 Pecs, Hungary
| | - Bela Melegh
- Department of Medical Genetics, University of Pecs, Szigeti 12, H-7624 Pecs, Hungary ; Szentagothai Research Centre, Ifjusag 20, H-7624 Pecs, Hungary
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Duga B, Czako M, Komlosi K, Hadzsiev K, Torok K, Sumegi K, Kisfali P, Kosztolanyi G, Melegh B. Deletion of 4q28.3-31.23 in the background of multiple malformations with pulmonary hypertension. Mol Cytogenet 2014; 7:36. [PMID: 24959202 PMCID: PMC4066825 DOI: 10.1186/1755-8166-7-36] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/24/2014] [Accepted: 05/23/2014] [Indexed: 11/16/2022] Open
Abstract
The 4q deletion syndrome shows a broad spectrum of clinical manifestations consisting of key features comprising growth failure, developmental delay, craniofacial dysmorphism, digital anomalies, and cardiac and skeletal defects. We have identified a de novo interstitial distal deletion in a 9 month-old girl with growth failure, developmental delay, ventricular septum defect in the subaortic region, patent foramen ovale and patent ductus arteriosus, vascular malformation of the lung, dysgenesis of the corpus callosum and craniofacial dysmorphism using array-comparative genomic hybridization. This de novo deletion is located at 4q28.3-31.23 (136,127,048 - 150,690,325), its size is 14.56 Mb, and contains 8 relevant genes (PCDH18, SETD7, ELMOD2, IL15, GAB1, HHIP, SMAD1, NR3C2) with possible contributions to the phenotype. Among other functions, a role in lung morphogenesis and tubulogenesis can be attributed to the deleted genes in our patient, which may explain the unique feature of vascular malformation of the lung leading to pulmonary hypertension. With the detailed molecular characterization of our case with 4q- syndrome we hope to contribute to the elucidation of the genetic spectrum of this disorder.
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Affiliation(s)
- Balazs Duga
- Department of Medical Genetics, Clinical Centre, University of Pecs, Szigeti 12, Pecs H-7624, Hungary ; Szentágothai Research Centre, University of Pecs, Ifjusag 20, Pecs H-7624, Hungary
| | - Marta Czako
- Department of Medical Genetics, Clinical Centre, University of Pecs, Szigeti 12, Pecs H-7624, Hungary ; Szentágothai Research Centre, University of Pecs, Ifjusag 20, Pecs H-7624, Hungary
| | - Katalin Komlosi
- Department of Medical Genetics, Clinical Centre, University of Pecs, Szigeti 12, Pecs H-7624, Hungary ; Szentágothai Research Centre, University of Pecs, Ifjusag 20, Pecs H-7624, Hungary
| | - Kinga Hadzsiev
- Department of Medical Genetics, Clinical Centre, University of Pecs, Szigeti 12, Pecs H-7624, Hungary ; Szentágothai Research Centre, University of Pecs, Ifjusag 20, Pecs H-7624, Hungary
| | - Katalin Torok
- Department of Pediatrics, Clinical Centre, University of Pecs, Jozsef Attila 7, Pecs H-7623, Hungary
| | - Katalin Sumegi
- Department of Medical Genetics, Clinical Centre, University of Pecs, Szigeti 12, Pecs H-7624, Hungary ; Szentágothai Research Centre, University of Pecs, Ifjusag 20, Pecs H-7624, Hungary
| | - Peter Kisfali
- Department of Medical Genetics, Clinical Centre, University of Pecs, Szigeti 12, Pecs H-7624, Hungary ; Szentágothai Research Centre, University of Pecs, Ifjusag 20, Pecs H-7624, Hungary
| | - Gyorgy Kosztolanyi
- Department of Medical Genetics, Clinical Centre, University of Pecs, Szigeti 12, Pecs H-7624, Hungary ; Szentágothai Research Centre, University of Pecs, Ifjusag 20, Pecs H-7624, Hungary
| | - Bela Melegh
- Department of Medical Genetics, Clinical Centre, University of Pecs, Szigeti 12, Pecs H-7624, Hungary ; Szentágothai Research Centre, University of Pecs, Ifjusag 20, Pecs H-7624, Hungary
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I. Melegh B, Duga B, Sumegi K, Kisfali P, Maasz A, Komlosi K, Hadzsiev K, Komoly S, Kosztolanyi G, Melegh B. Mutations of the Apolipoprotein A5 Gene with Inherited Hypertriglyceridaemia: Review of the Current Literature. Curr Med Chem 2012. [DOI: 10.2174/0929867311209066163] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
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Bene J, Csiky B, Komlosi K, Sulyok E, Melegh B. Dynamic adaptive changes of the serum carnitine esters during and after L-carnitine supplementation in patients with maintenance haemodialysis. Scandinavian Journal of Clinical and Laboratory Investigation 2011; 71:280-6. [DOI: 10.3109/00365513.2011.560674] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
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Hadzsiev K, Polgar N, Bene J, Komlosi K, Karteszi J, Hollody K, Kosztolanyi G, Renieri A, Melegh B. Analysis of Hungarian patients with Rett syndrome phenotype for MECP2, CDKL5 and FOXG1 gene mutations. J Hum Genet 2010; 56:183-7. [DOI: 10.1038/jhg.2010.156] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/06/2023]
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Hadzsiev K, Maasz A, Kisfali P, Kalman E, Gomori E, Pal E, Berenyi E, Komlosi K, Melegh B. Mitochondrial DNA 11777C>A mutation associated Leigh syndrome: case report with a review of the previously described pedigrees. Neuromolecular Med 2010; 12:277-84. [PMID: 20502985 DOI: 10.1007/s12017-010-8115-9] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/19/2009] [Accepted: 04/29/2010] [Indexed: 10/19/2022]
Abstract
Here, we present a male infant with clinical signs of typical Leigh syndrome. The first symptom, myoclonus was presented already on the 5th day of life; at 7 months of age limb convulsions and cerebral paresis with hypotonia were developed. At the age of 11 months, MRI verified increased signal intensity in the entire mesencephalon and medulla oblongata; while gray matter proton spectroscopy revealed presence of lactate increase in the brain. At age of 17 months, the child died in cardiorespiratory arrest. After autopsy, the diagnosis of Leigh syndrome was established; using DNA isolated from skeletal muscle and liver, heteroplasmic (>50%) mitochondrial 11777C>A was detected in the fourth subunit of NADH dehydrogenase enzyme (MTND4) encoding gene, which causes Arg --> Ser replacement. The mutation was also detected in low copy number in blood of mother. Albeit this mutation type is well recognized as a typical mtDNA mutation, according the reports available on the PubMed, this mutation was described only in four patients with wide phenotypic variations; here, we reviewed the characteristic clinical features of them. Taken together, the earliest onset of symptoms, the nature of the first presentation signs, the most rapid progression, the character of minor additional symptoms, and the early fatal outcome differentiate the phenotypic variant of the proband presented here from cases reported so far by others.
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Affiliation(s)
- Kinga Hadzsiev
- Department of Medical Genetics, University of Pecs, Pecs, Hungary
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Farago B, Talian GC, Komlosi K, Nagy G, Berki T, Gyetvai A, Szekanecz Z, Nyarady Z, Kiss CG, Nemeth P, Czirjak L, Melegh B. Protein tyrosine phosphatase gene C1858T allele confers risk for rheumatoid arthritis in Hungarian subjects. Rheumatol Int 2008; 29:793-6. [PMID: 19034456 DOI: 10.1007/s00296-008-0771-9] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/07/2008] [Accepted: 11/04/2008] [Indexed: 01/15/2023]
Abstract
The C1858T allele of the PTPN22 gene has been reported to confer risk for RA; but in some reports, the effect was restricted to RF- and/or anti-CCP-seropositive patients. Hungarian RA patients and matched controls were genotyped. The 1858T allele showed an increased prevalence in RA patients compared to controls. The 1858T allele represents a risk factor in the whole RA population (P = 0.001); an association was found both in RF-seropositive (P = 0.001) and anti-CCP-seropositive patients (P = 0.001), and in subjects with the combination of these factors (P = 0.002). In TT homozygotes, the estimated susceptibility to RA was more than double (OR = 5.04) of that seen in TC heterozygotes (OR = 1.89); the same gene dosage effect was observed in all seropositive RA subgroups. Our data show that the Hungarian RA patients belong to the populations in which the 1858T allele represents a susceptibility factor both in the RF- and/or anti-CCP-seropositive subjects, and the association exhibit a gene dosage dependency.
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Affiliation(s)
- Bernadett Farago
- Department of Medical Genetics and Child Development, University of Pécs, Szigeti ut 12, 7624, Pecs, Hungary
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Papp E, Havasi V, Bene J, Komlosi K, Talian G, Feher G, Horvath B, Szapary L, Toth K, Melegh B. Does glycoprotein IIIa gene (Pl(A)) polymorphism influence clopidogrel resistance? : a study in older patients. Drugs Aging 2007; 24:345-50. [PMID: 17432927 DOI: 10.2165/00002512-200724040-00006] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/07/2023]
Abstract
BACKGROUND Clopidogrel is a potent antiplatelet drug used for secondary prevention after ischaemic cardiovascular or cerebrovascular events. In patients with aspirin (acetylsalicylic acid) intolerance or resistance, it is used as monotherapy. Recent data report that Pl(A) polymorphism of the glycoprotein IIIa gene may account for differences in aspirin-induced antiplatelet effects. An increased degree of platelet reactivity was also reported in Pl(A2) carriers compared with Pl(A1/A1) patients after administration of a clopidogrel 300mg loading dose. OBJECTIVES The aim of this study was to assess the modulatory effect of the Pl(A2) allele on platelet aggregation in patients taking long-term clopidogrel. M ETHODS: The prevalence of the Pl(A2) allele was assessed in 38 (21 males, 17 females; mean age 63 +/- 13 years) clopidogrel-resistant and 59 (26 males, 33 females; mean age 63 +/- 11 years) clopidogrel-responsive patients. The polymerase chain reaction-restriction fragment length polymorphism method was utilised to evaluate Pl(A) polymorphism. A Carat TX4 optical platelet aggregometer (Carat Diagnostics Ltd, Budapest, Hungary) was used to measure 5 and 10 micromol/L adenosine diphosphate-induced platelet aggregation. RESULTS Significantly more patients were taking combination antiplatelet therapy in the clopidogrel-resistant group than in the clopidogrel-responsive group (50% vs 30%, respectively). The prevalence of the Pl(A2) allele did not differ significantly between the two groups (0.09 vs 0.13), even after adjustment for combination therapy and various risk factors. CONCLUSIONS Our results show that carriers of the Pl(A2) allele do not have an increased risk of clopidogrel resistance. These findings and data from our previous studies suggest that patients with a Pl(A2) allele homozygosity may benefit from antiplatelet therapy based on clopidogrel rather than aspirin.
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Affiliation(s)
- Elod Papp
- First Department of Medicine, School of Medicine, University of Pecs, Pecs, Hungary
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