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Geerts C, Sznajer Y, D'haenens E, Dumitriu D, Nassogne MC. Phenotypic spectrum of patients with Poretti-Boltshauser syndrome: Patient report of antenatal ventriculomegaly and esophageal atresia. Eur J Med Genet 2023; 66:104692. [PMID: 36592689 DOI: 10.1016/j.ejmg.2022.104692] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/13/2022] [Revised: 11/12/2022] [Accepted: 12/29/2022] [Indexed: 01/01/2023]
Abstract
Poretti-Boltshauser syndrome (PTBHS) is an autosomal recessive disorder characterized by cerebellar dysplasia with cysts and an abnormal shape of the fourth ventricle on neuroimaging, due to pathogenic variants in the LAMA1 gene. The clinical spectrum mainly consists of neurological and ophthalmological manifestations, including non-progressive cerebellar ataxia, oculomotor apraxia, language impairment, intellectual disability, high myopia, abnormal eye movements and retinal dystrophy. We report a patient presenting with ventriculomegaly on antenatal neuroimaging and a neonatal diagnosis of Type III esophageal atresia. She subsequently developed severe myopia and strabismus with retinal dystrophy, mild developmental delay, and cerebellar dysplasia. Genetic investigations confirmed PTBHS. This report confirms previous reports of antenatal ventriculomegaly in PTBHS patients and documents a so far unreported occurrence of esophageal atresia in PTBHS. We additionally gathered phenotype and genotype descriptions of published cases in an effort to better define the spectrum of PTBHS.
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Affiliation(s)
- Chloé Geerts
- Paediatric Neurology, Cliniques Universitaires Saint-Luc, UCLouvain, Brussels, Belgium.
| | - Yves Sznajer
- Center for Human Genetics, Cliniques Universitaires Saint-Luc, UCLouvain, Brussels, Belgium
| | - Erika D'haenens
- Center for Medical Genetics Ghent, Ghent University Hospital, Ghent, Belgium
| | - Dana Dumitriu
- Paediatric Radiology, Cliniques Universitaires Saint-Luc, UCLouvain, Brussels, Belgium
| | - Marie-Cécile Nassogne
- Paediatric Neurology, Cliniques Universitaires Saint-Luc, UCLouvain, Brussels, Belgium
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2
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Kuntawala DH, Martins F, Vitorino R, Rebelo S. Automatic Text-Mining Approach to Identify Molecular Target Candidates Associated with Metabolic Processes for Myotonic Dystrophy Type 1. INTERNATIONAL JOURNAL OF ENVIRONMENTAL RESEARCH AND PUBLIC HEALTH 2023; 20:2283. [PMID: 36767649 PMCID: PMC9915907 DOI: 10.3390/ijerph20032283] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 12/22/2022] [Revised: 01/20/2023] [Accepted: 01/25/2023] [Indexed: 06/18/2023]
Abstract
Myotonic dystrophy type 1 (DM1) is an autosomal dominant hereditary disease caused by abnormal expansion of unstable CTG repeats in the 3' untranslated region of the myotonic dystrophy protein kinase (DMPK) gene. This disease mainly affects skeletal muscle, resulting in myotonia, progressive distal muscle weakness, and atrophy, but also affects other tissues and systems, such as the heart and central nervous system. Despite some studies reporting therapeutic strategies for DM1, many issues remain unsolved, such as the contribution of metabolic and mitochondrial dysfunctions to DM1 pathogenesis. Therefore, it is crucial to identify molecular target candidates associated with metabolic processes for DM1. In this study, resorting to a bibliometric analysis, articles combining DM1, and metabolic/metabolism terms were identified and further analyzed using an unbiased strategy of automatic text mining with VOSviewer software. A list of candidate molecular targets for DM1 associated with metabolic/metabolism was generated and compared with genes previously associated with DM1 in the DisGeNET database. Furthermore, g:Profiler was used to perform a functional enrichment analysis using the Gene Ontology (GO) and REAC databases. Enriched signaling pathways were identified using integrated bioinformatics enrichment analyses. The results revealed that only 15 of the genes identified in the bibliometric analysis were previously associated with DM1 in the DisGeNET database. Of note, we identified 71 genes not previously associated with DM1, which are of particular interest and should be further explored. The functional enrichment analysis of these genes revealed that regulation of cellular metabolic and metabolic processes were the most associated biological processes. Additionally, a number of signaling pathways were found to be enriched, e.g., signaling by receptor tyrosine kinases, signaling by NRTK1 (TRKA), TRKA activation by NGF, PI3K-AKT activation, prolonged ERK activation events, and axon guidance. Overall, several valuable target candidates related to metabolic processes for DM1 were identified, such as NGF, NTRK1, RhoA, ROCK1, ROCK2, DAG, ACTA, ID1, ID2 MYOD, and MYOG. Therefore, our study strengthens the hypothesis that metabolic dysfunctions contribute to DM1 pathogenesis, and the exploitation of metabolic dysfunction targets is crucial for the development of future therapeutic interventions for DM1.
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3
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Schiff ER, Aychoua N, Nutan S, Davagnanam I, Moore AT, Robson AG, Patel CK, Webster AR, Arno G. Variability of retinopathy consequent upon novel mutations in LAMA1. Ophthalmic Genet 2022; 43:671-678. [PMID: 35616092 DOI: 10.1080/13816810.2022.2076283] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
Abstract
PURPOSE Bi-allelic mutations in LAMA1 (laminin 1) (OMIM # 150320) cause Poretti-Boltshauser Syndrome (PTBHS), a rare non-progressive cerebellar dysplasia disorder with ophthalmic manifestations including oculomotor apraxia, high myopia, and retinal dystrophy. Only 38 variants, nearly all loss of function have been reported. Here, we describe novel LAMA1 variants and detailed retinal manifestations in two unrelated families. METHODS Whole-genome sequencing was conducted on three siblings of a consanguineous family with myopia and retinal dystrophy and on a child from an unrelated non-consanguineous couple. Clinical evaluation included full ophthalmic examination, detailed colour, autofluorescence retinal imaging, retinal optical coherence tomography (OCT), fluorescein angiography under anesthesia, and pattern and full-field electroretinography. RESULTS Genetic analysis revealed a novel homozygous LAMA1 frameshift variant, c.1492del p.(Arg498Glyfs *25), in the affected siblings in family 1 and a novel frameshift c.3065del p.(Gly1022Valfs *2) and a deletion spanning exons 17-23 in an unrelated individual in family 2. Two of the three siblings and the unrelated child had oculomotor apraxia in childhood; none of the siblings had symptoms of other neurological dysfunction as adults. All four had myopia. The affected siblings had a qualitatively similar retinopathy of wide-ranging severity. The unrelated patient had a severe abnormality of retinal vascular development, which resulted in vitreous haemorrhage and neovascular glaucoma in the left eye and a rhegmatogenous retinal detachment in the right eye. CONCLUSIONS This report describes the detailed retinal structural and functional consequences of LAMA1 deficiency in four patients from two families, and these exhibit significant variability with evidence of both retinal dystrophy and abnormal and incomplete retinal vascularisation.
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Affiliation(s)
- Elena R Schiff
- Moorfields Eye Hospital, London, UK.,UCL Institute of Ophthalmology, London, UK
| | | | - Savita Nutan
- North Thames Genomic Laboratory Hub, Great Ormond Street NHS Foundation Trust, London, UK
| | - Indran Davagnanam
- Moorfields Eye Hospital, London, UK.,National Hospital for Neurology and Neurosurgery, London, UK.,UCL Institute of Neurology, London, UK
| | - Anthony T Moore
- UCL Institute of Ophthalmology, London, UK.,University of California, San Francisco, San Francisco, California, USA
| | - A G Robson
- Moorfields Eye Hospital, London, UK.,UCL Institute of Ophthalmology, London, UK
| | - C K Patel
- Great Ormond Street Hospital, London, UK.,Oxford Eye Hospital, Oxford University Hospitals NHS Foundation Trust, Oxford, UK
| | - Andrew R Webster
- Moorfields Eye Hospital, London, UK.,UCL Institute of Ophthalmology, London, UK
| | - Gavin Arno
- Moorfields Eye Hospital, London, UK.,UCL Institute of Ophthalmology, London, UK.,North Thames Genomic Laboratory Hub, Great Ormond Street NHS Foundation Trust, London, UK
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4
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Luo S, Liu ZG, Wang J, Luo JX, Ye XG, Li X, Zhai QX, Liu XR, Wang J, Gao LD, Liu FL, Ye ZL, Li H, Gao ZF, Guo QH, Li BM, Yi YH, Liao WP. Recessive LAMA5 Variants Associated With Partial Epilepsy and Spasms in Infancy. Front Mol Neurosci 2022; 15:825390. [PMID: 35663266 PMCID: PMC9162154 DOI: 10.3389/fnmol.2022.825390] [Citation(s) in RCA: 8] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/30/2021] [Accepted: 04/19/2022] [Indexed: 12/23/2022] Open
Abstract
Objective The LAMA5 gene encodes the laminin subunit α5, the most abundant laminin α subunit in the human brain. It forms heterotrimers with the subunit β1/β2 and γ1/γ3 and regulates neurodevelopmental processes. Genes encoding subunits of the laminin heterotrimers containing subunit α5 have been reported to be associated with human diseases. Among LAMAs encoding the laminin α subunit, LAMA1-4 have also been reported to be associated with human disease. In this study, we investigated the association between LAMA5 and epilepsy. Methods Trios-based whole-exome sequencing was performed in a cohort of 118 infants suffering from focal seizures with or without spasms. Protein modeling was used to assess the damaging effects of variations. The LAMAs expression was analyzed with data from the GTEX and VarCards databases. Results Six pairs of compound heterozygous missense variants in LAMA5 were identified in six unrelated patients. All affected individuals suffered from focal seizures with mild developmental delay, and three patients presented also spasms. These variants had no or low allele frequencies in controls and presented statistically higher frequency in the case cohort than in controls. The recessive burden analysis showed that recessive LAMA5 variants identified in this cohort were significantly more than the expected number in the East Asian population. Protein modeling showed that at least one variant in each pair of biallelic variants affected hydrogen bonds with surrounding amino acids. Among the biallelic variants in cases with only focal seizures, two variants of each pair were located in different structural domains or domains/links, whereas in the cases with spasms, the biallelic variants were constituted by two variants in the identical functional domains or both with hydrogen bond changes. Conclusion Recessive LAMA5 variants were potentially associated with infant epilepsy. The establishment of the association between LAMA5 and epilepsy will facilitate the genetic diagnosis and management in patients with infant epilepsy.
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Affiliation(s)
- Sheng Luo
- Key Laboratory of Neurogenetics and Channelopathies of Guangdong Province and the Ministry of Education of China, Department of Neurology, Institute of Neuroscience, Second Affiliated Hospital of Guangzhou Medical University, Guangzhou, China
| | - Zhi-Gang Liu
- The Second School of Clinical Medicine, Southern Medical University, Guangzhou, China
- Department of Pediatrics, Affiliated Foshan Maternity & Child Healthcare Hospital, Southern Medical University, Foshan, China
| | - Juan Wang
- Key Laboratory of Neurogenetics and Channelopathies of Guangdong Province and the Ministry of Education of China, Department of Neurology, Institute of Neuroscience, Second Affiliated Hospital of Guangzhou Medical University, Guangzhou, China
| | - Jun-Xia Luo
- Epilepsy Center, Qilu Children’s Hospital of Shandong University, Jinan, China
| | - Xing-Guang Ye
- The Second School of Clinical Medicine, Southern Medical University, Guangzhou, China
- Department of Pediatrics, Affiliated Foshan Maternity & Child Healthcare Hospital, Southern Medical University, Foshan, China
| | - Xin Li
- Department of Pediatrics, The Second Hospital, Cheeloo College of Medicine, Shandong University, Jinan, China
| | - Qiong-Xiang Zhai
- Department of Neurology, Guangdong General Hospital, Guangdong Academy of Medical Sciences, Guangzhou, China
| | - Xiao-Rong Liu
- Key Laboratory of Neurogenetics and Channelopathies of Guangdong Province and the Ministry of Education of China, Department of Neurology, Institute of Neuroscience, Second Affiliated Hospital of Guangzhou Medical University, Guangzhou, China
| | - Jie Wang
- Key Laboratory of Neurogenetics and Channelopathies of Guangdong Province and the Ministry of Education of China, Department of Neurology, Institute of Neuroscience, Second Affiliated Hospital of Guangzhou Medical University, Guangzhou, China
| | - Liang-Di Gao
- Key Laboratory of Neurogenetics and Channelopathies of Guangdong Province and the Ministry of Education of China, Department of Neurology, Institute of Neuroscience, Second Affiliated Hospital of Guangzhou Medical University, Guangzhou, China
| | - Fu-Li Liu
- Department of Neurology, The First People’s Hospital of Foshan, Foshan, China
| | - Zi-Long Ye
- Key Laboratory of Neurogenetics and Channelopathies of Guangdong Province and the Ministry of Education of China, Department of Neurology, Institute of Neuroscience, Second Affiliated Hospital of Guangzhou Medical University, Guangzhou, China
| | - Huan Li
- Key Laboratory of Neurogenetics and Channelopathies of Guangdong Province and the Ministry of Education of China, Department of Neurology, Institute of Neuroscience, Second Affiliated Hospital of Guangzhou Medical University, Guangzhou, China
| | - Zai-Fen Gao
- Epilepsy Center, Qilu Children’s Hospital of Shandong University, Jinan, China
| | - Qing-Hui Guo
- Department of Pediatrics, The Second Hospital, Cheeloo College of Medicine, Shandong University, Jinan, China
| | - Bing-Mei Li
- Key Laboratory of Neurogenetics and Channelopathies of Guangdong Province and the Ministry of Education of China, Department of Neurology, Institute of Neuroscience, Second Affiliated Hospital of Guangzhou Medical University, Guangzhou, China
| | - Yong-Hong Yi
- Key Laboratory of Neurogenetics and Channelopathies of Guangdong Province and the Ministry of Education of China, Department of Neurology, Institute of Neuroscience, Second Affiliated Hospital of Guangzhou Medical University, Guangzhou, China
| | - Wei-Ping Liao
- Key Laboratory of Neurogenetics and Channelopathies of Guangdong Province and the Ministry of Education of China, Department of Neurology, Institute of Neuroscience, Second Affiliated Hospital of Guangzhou Medical University, Guangzhou, China
- *Correspondence: Wei-Ping Liao,
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Faizi N, Casteels I, Termote B, Coucke P, De Baere E, De Bruyne M, Balikova I. High myopia and vitreal veils in a patient with Poretti- Boltshauser syndrome due to a novel homozygous LAMA1 mutation. Ophthalmic Genet 2022; 43:653-657. [PMID: 35535551 DOI: 10.1080/13816810.2022.2068045] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
Affiliation(s)
- Nawid Faizi
- Department of Ophthalmology, University Hospital Leuven, Leuven, Belgium
| | - Ingele Casteels
- Department of Ophthalmology, University Hospital Leuven, Leuven, Belgium
| | - Bruno Termote
- Department of Radiology, Jessa Hospital Hasselt, Hasselt, Belgium
| | - Paul Coucke
- Department of Biomolecular Medicine, Ghent University, Ghent, Belgium.,Center for Medical Genetics Ghent, Ghent University Hospital, Ghent, Belgium
| | - Elfride De Baere
- Department of Biomolecular Medicine, Ghent University, Ghent, Belgium.,Center for Medical Genetics Ghent, Ghent University Hospital, Ghent, Belgium
| | - Marieke De Bruyne
- Department of Biomolecular Medicine, Ghent University, Ghent, Belgium.,Center for Medical Genetics Ghent, Ghent University Hospital, Ghent, Belgium
| | - Irina Balikova
- Department of Ophthalmology, University Hospital Leuven, Leuven, Belgium
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