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Kose M, Canda E, Kagnici M, Aykut A, Adebali O, Durmaz A, Bircan A, Diniz G, Eraslan C, Kose E, Ünalp A, Yılmaz Ü, Ozyilmaz B, Özdemir TR, Atik T, Uçar SK, McFarland R, Taylor RW, Brown GK, Çoker M, Özkınay F. SURF1 related Leigh syndrome: Clinical and molecular findings of 16 patients from Turkey. Mol Genet Metab Rep 2020; 25:100657. [PMID: 33134083 PMCID: PMC7586243 DOI: 10.1016/j.ymgmr.2020.100657] [Citation(s) in RCA: 6] [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: 08/18/2020] [Revised: 10/03/2020] [Accepted: 10/03/2020] [Indexed: 01/09/2023] Open
Abstract
Introduction Pathogenic variants in SURF1, a nuclear-encoded gene encoding a mitochondrial chaperone involved in COX assembly, are one of the most common causes of Leigh syndrome (LS). Material-methods Sixteen patients diagnosed to have SURF1-related LS between 2012 and 2020 were included in the study. Their clinical, biochemical and molecular findings were recorded. 10/16 patients were diagnosed using whole-exome sequencing (WES), 4/16 by Sanger sequencing of SURF1, 1/16 via targeted exome sequencing and 1/16 patient with whole-genome sequencing (WGS). The pathogenicity of SURF1 variants was evaluated by phylogenetic studies and modelling on the 3D structure of the SURF1 protein. Results We identified 16 patients from 14 unrelated families who were either homozygous or compound heterozygous for SURF1 pathogenic variants. Nine different SURF1 variants were detected The c.769G > A was the most common variant with an allelic frequency of 42.8% (12/28), c.870dupT [(p.Lys291*); (8/28 28.5%)], c.169delG [(p.Glu57Lysfs*15), (2/24; 7.1%)], c.532 T > A [(p.Tyr178Asn); (2/28, 7.1%)], c.653_654delCT [(p.Pro218Argfs*29); (4/28, 14.2%)] c.595_597delGGA [(p.Gly199del); (1/28, 3.5%)], c.751 + 1G > A (2/28, 4.1%), c.356C > T [(p.Pro119Leu); (2/28, 3.5%)] were the other detected variants. Two pathogenic variants, C.595_597delGGA and c.356C > T, were detected for the first time. The c.769 G > A variant detected in 6 patients from 5 families was evaluated in terms of phenotype-genotype correlation. There was no definite genotype – phenotype correlation. Conclusions To date, more than 120 patients of LS with SURF1 pathogenic variants have been reported. We shared the clinical, molecular data and natural course of 16 new SURF1 defect patients from our country. This study is the first comprehensive research from Turkey that provides information about disease-causing variants in the SURF1 gene. The identification of common variants and phenotype of the SURF1 gene is important for understanding SURF1 related LS. Synopsis SURF1 gene defects are one of the most important causes of LS; patients have a homogeneous clinical and biochemical phenotype.
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Affiliation(s)
- Melis Kose
- Izmir Katip Çelebi University Faculty of Medicine, Department of Pediatrics, Division of Pediatric Metabolism and Nutrition, Izmir, Turkey.,Ege University Faculty of Medicine, Department of Pediatrics, Division of Nutrition and Metabolism, Izmir, Turkey.,Oxford University Hospitals NHS Foundation Trust, The Churchill Hospital, Oxford Medical Genetics Laboratories, Oxford, UK
| | - Ebru Canda
- Ege University Faculty of Medicine, Department of Pediatrics, Division of Nutrition and Metabolism, Izmir, Turkey
| | - Mehtap Kagnici
- University of Health Sciences, Antalya Training and Research Hospital, Department of Pediatrics, Division of Metabolism and Nutrition, Antalya, Turkey
| | - Ayça Aykut
- Ege University Faculty of Medicine, Department of Medical Genetics, Izmir, Turkey
| | - Ogün Adebali
- Sabanci University, Faculty of Engineering and Natural Sciences, Molecular Biology, Genetics and Bioengineering Program, Adebali Lab, Istanbul, Turkey
| | - Asude Durmaz
- Ege University Faculty of Medicine, Department of Medical Genetics, Izmir, Turkey
| | - Aylin Bircan
- Sabanci University, Faculty of Engineering and Natural Sciences, Molecular Biology, Genetics and Bioengineering Program, Adebali Lab, Istanbul, Turkey
| | - Gulden Diniz
- Izmir Democracy University, Faculty of Medicine, Department of Pathology, İzmir, Turkey
| | - Cenk Eraslan
- Ege University Faculty of Medicine, Department of Radiology, Division of Neuroradiology, Izmir, Turkey
| | - Engin Kose
- Ankara University Faculty of Medicine, Department of Pediatrics, Division of Metabolism and Nutrition, Ankara, Turkey
| | - Aycan Ünalp
- University of Health Sciences, Behçet Uz Children Training and Research Hospital, Department of Pediatrics, Division of Neurology, Izmir, Turkey
| | - Ünsal Yılmaz
- University of Health Sciences, Behçet Uz Children Training and Research Hospital, Department of Pediatrics, Division of Neurology, Izmir, Turkey
| | - Berk Ozyilmaz
- University of Health Sciences Tepecik Training and Research Hospital, Department of Medical Genetics, Izmir, Turkey
| | - Taha Reşid Özdemir
- University of Health Sciences Tepecik Training and Research Hospital, Department of Medical Genetics, Izmir, Turkey
| | - Tahir Atik
- Ege University Faculty of Medicine, Department of Pediatrics, Division of Nutrition and Metabolism, Izmir, Turkey
| | - Sema Kalkan Uçar
- Ege University Faculty of Medicine, Department of Pediatrics, Division of Nutrition and Metabolism, Izmir, Turkey
| | - Robert McFarland
- Wellcome Centre for Mitochondrial Research, Translational and Clinical Research Institute, Newcastle University, Newcastle upon Tyne, UK
| | - Robert W Taylor
- Wellcome Centre for Mitochondrial Research, Translational and Clinical Research Institute, Newcastle University, Newcastle upon Tyne, UK
| | - Garry K Brown
- Oxford University Hospitals NHS Foundation Trust, The Churchill Hospital, Oxford Medical Genetics Laboratories, Oxford, UK
| | - Mahmut Çoker
- Ege University Faculty of Medicine, Department of Pediatrics, Division of Nutrition and Metabolism, Izmir, Turkey
| | - Ferda Özkınay
- Ege University Faculty of Medicine, Department of Pediatrics, Division of Nutrition and Metabolism, Izmir, Turkey.,University of Health Sciences, Antalya Training and Research Hospital, Department of Pediatrics, Division of Metabolism and Nutrition, Antalya, Turkey
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Köse MD, Kagnici M, Özdemir TR, Erdur CB, Erdemir G, Karakoyun M, Guzin Y, Ceylaner S, Genel F. Clinical findings in five Turkish patients with citrin deficiency and identification of a novel mutation on SLC25A13. J Pediatr Endocrinol Metab 2020; 33:157-163. [PMID: 31809266 DOI: 10.1515/jpem-2019-0377] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/18/2019] [Accepted: 10/17/2019] [Indexed: 12/20/2022]
Abstract
Background Citrin deficiency (CD) is an autosomal recessive genetic disorder caused by a defect in the mitochondrial aspartate/glutamate antiporter, citrin. Three clinical manifestations have been described until today. Case presentation We reported 5 CD patients from two families. Four patients were male and one patient was female. Two of them have NICCD (neonatal intrahepatic cholestasis caused by citrin deficiency); three of them have CTLN2 (adult-onset type II citrullinemia). Both NICCD patients showed typical clinical and biochemical changes with a diagnosis confirmed by mutations in the SLC25A13 gene. We detected a previously unreported homozygous novel mutation c.478delC (L160Wfs*36 ) on the SLC25A13 gene. All of the CTLN2 patients were siblings. Proband was a 15-year-old mentally retarded and autistic male who had admitted to our emergency with disorientation. Laboratory data showed hyperammonemia and citrullinemia. Conclusions Two different profiles of age-related CD have been depicted with this article. It has been aimed to underline that the CD can be observed in different forms not only in neonatals or little infants but also in adolescents. This article is the first case series that covers both NICCD and CTLN2 cases together and that has been published in Turkey. Considering the fact that especially the majority of CTLN2 cases have been identified in Asian countries, our article has vital importance in terms of defining phenotypic features of the disease.
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Affiliation(s)
- Melis Demir Köse
- Behçet Uz Children Research and Training Hospital, Pediatric Metabolism and Nutrition Department, Ismet Kaptan Street, 35100, İzmir, Turkey
| | - Mehtap Kagnici
- Behçet Uz Children Training and Research Hospital, Pediatric Metabolism and Nutrition Department, Izmir, Turkey
| | - Taha Reşit Özdemir
- Tepecik Training and Research Hospital, Genetics Department, Izmir, Turkey
| | - Cahit Barış Erdur
- Behçet Uz Children Training and Research Hospital, Pediatric Gastroenterology, Hepatology and Nutrition Department, Izmir, Turkey
| | - Gülin Erdemir
- Behçet Uz Children Training and Research Hospital, Pediatric Gastroenterology, Hepatology and Nutrition Department, Izmir, Turkey
| | - Miray Karakoyun
- Tepecik Children Training and Research Hospital, Pediatric Gastroenterology, Hepatology and Nutrition Department, Izmir, Turkey
| | - Yiğit Guzin
- Behçet Uz Children Training and Research Hospital, Pediatrics Department, Izmir, Turkey
| | | | - Ferah Genel
- Behçet Uz Children Training and Research Hospital, Pediatric Allergy and Immunology Department, Izmir, Istanbul, Turkey
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Canda E, Kose M, Kagnici M, Ucar SK, Sozmen EY, Coker M. Patients with Gaucher type 1: Switching from imiglucerase to miglustat therapy. Blood Cells Mol Dis 2017; 68:180-184. [PMID: 28111116 DOI: 10.1016/j.bcmd.2017.01.007] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/01/2017] [Accepted: 01/12/2017] [Indexed: 11/16/2022]
Affiliation(s)
- Ebru Canda
- Ege University, Faculty of Medicine, Department of Pediatrics, Division of Metabolism and Nutrition, Turkey.
| | - Melis Kose
- Ege University, Faculty of Medicine, Department of Pediatrics, Division of Metabolism and Nutrition, Turkey.
| | - Mehtap Kagnici
- Ege University, Faculty of Medicine, Department of Pediatrics, Division of Metabolism and Nutrition, Turkey.
| | - Sema Kalkan Ucar
- Ege University, Faculty of Medicine, Department of Pediatrics, Division of Metabolism and Nutrition, Turkey.
| | - Eser Y Sozmen
- Ege University, Faculty of Medicine, Department of Biochemistry, Turkey.
| | - Mahmut Coker
- Ege University, Faculty of Medicine, Department of Pediatrics, Division of Metabolism and Nutrition, Turkey.
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