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Kumar A, Dige M, Niranjan SK, Ahlawat S, Arora R, Kour A, Vijh RK. Whole genome resequencing revealed genomic variants and functional pathways related to adaptation in Indian yak populations. Anim Biotechnol 2024; 35:2282723. [PMID: 38006247 DOI: 10.1080/10495398.2023.2282723] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2023]
Abstract
The present study aims to identify genomic variants through a whole genome sequencing (WGS) approach and uncover biological pathways associated with adaptation and fitness in Indian yak populations. A total of 30 samples (10 from each population) were included from Arunachali, Himachali and Ladakhi yak populations. WGS analysis revealed a total of 32171644, 27260825, and 32632460 SNPs and 4865254, 4429941, and 4847513 Indels in the Arunachali, Himachali, and Ladakhi yaks, respectively. Genes such as RYR2, SYNE2, BOLA, HF1, and the novel transcript ENSBGRG00000011079 were found to have the maximum number of high impact variants in all three yak populations, and might play a major role in local adaptation. Functional enrichment analysis of genes harboring high impact SNPs revealed overrepresented pathways related to response to stress, immune system regulation, and high-altitude adaptation. This study provides comprehensive information about genomic variants and their annotation in Indian yak populations, thus would serve as a data resource for researchers working on the yaks. Furthermore, it could be well exploited for better yak conservation strategies by estimating population genetics parameters viz., effective population size, inbreeding, and observed and expected heterozygosity.
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Affiliation(s)
- Amod Kumar
- Animal Genetics Division, ICAR-National Bureau of Animal Genetic Resources (NBAGR), Karnal, India
| | - Mahesh Dige
- Animal Genetic Resources Division, ICAR-National Bureau of Animal Genetic Resources (NBAGR), Karnal, India
| | - Saket Kumar Niranjan
- Animal Genetics Division, ICAR-National Bureau of Animal Genetic Resources (NBAGR), Karnal, India
| | - Sonika Ahlawat
- Animal Biotechnology Division, ICAR-National Bureau of Animal Genetic Resources (NBAGR), Karnal, India
| | - Reena Arora
- Animal Biotechnology Division, ICAR-National Bureau of Animal Genetic Resources (NBAGR), Karnal, India
| | - Aneet Kour
- ICAR-National Research Centre on Yak, Dirang, India
| | - Ramesh Kumar Vijh
- Animal Genetics Division, ICAR-National Bureau of Animal Genetic Resources (NBAGR), Karnal, India
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Xing Y, Cui T, Sun F. A novel RyR2 mutation associated with co-morbid catecholaminergic polymorphic ventricular tachycardia (CPVT) and benign epilepsy with centrotemporal spikes (BECTS). J Electrocardiol 2024; 84:75-80. [PMID: 38574633 DOI: 10.1016/j.jelectrocard.2024.03.013] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/23/2024] [Revised: 03/19/2024] [Accepted: 03/19/2024] [Indexed: 04/06/2024]
Abstract
In this case report, we describe a 14-year-old patient with a novel RyR2 gene mutation (c.6577G > T/p.Val2193Leu), identified through a comprehensive review of medical history, examination findings, and follow-up data. The pathogenic potential of this mutation, which results in the loss of some interatomic forces and compromises the closure of the RyR2 protein pore leading to calcium leakage, was analyzed using the I-TASSER Suite to predict the structural changes in the protein. This mutation manifested clinically as co-morbid catecholaminergic polymorphic ventricular tachycardia (CPVT) and benign epilepsy with centrotemporal spikes (BECTS), a combination not previously documented in the same patient. While seizures were successfully managed with levetiracetam, the patient's exercise-induced syncope episodes could not be controlled with metoprolol, highlighting the complexity and challenge in managing CPVT associated with this novel RyR2 variation.
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Affiliation(s)
- Yinxue Xing
- Department of Neurology, Affiliated Xing Tai People Hospital of Hebei Medical University, Xingtai, Hebei, China.
| | - Tao Cui
- Department of Neurology, Beijing Tiantan Hospital, Capital Medical University, Beijing, China; China National Clinical Research Center for Neurological Disease, NCRC-ND, Beijing, China
| | - Fan Sun
- Department of Neurology, Affiliated Hospital of Chengde Medical University, Chengde, Hebei, China
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Konomatsu K, Kakisaka Y, Jin K, Aiba T, Takahashi S, Ueda H, Kubota T, Soga T, Ukishiro K, Aoki M, Nakasato N. Genetic generalized epilepsy with catecholaminergic polymorphic ventricular tachycardia complicated by ryanodine receptor 2 variant: A case report. Seizure 2024; 117:284-287. [PMID: 38583245 DOI: 10.1016/j.seizure.2024.04.003] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/21/2023] [Revised: 04/02/2024] [Accepted: 04/03/2024] [Indexed: 04/09/2024] Open
Affiliation(s)
- Kazutoshi Konomatsu
- Departments of Epileptology, Tohoku University Graduate School of Medicine, Sendai, Miyagi, Japan; Departments of Neurology, Tohoku University Graduate School of Medicine, Sendai, Miyagi, Japan.
| | - Yosuke Kakisaka
- Departments of Epileptology, Tohoku University Graduate School of Medicine, Sendai, Miyagi, Japan
| | - Kazutaka Jin
- Departments of Epileptology, Tohoku University Graduate School of Medicine, Sendai, Miyagi, Japan
| | - Takeshi Aiba
- Department of Cardiovascular Medicine, National Cerebral and Cardiovascular Center, Suita, Osaka, Japan
| | - Shin Takahashi
- Department of Cardiology, National Hospital Organization, Morioka Medical Center, Morioka, Iwate, Japan
| | - Hironobu Ueda
- Division of Cardiology, Department of Internal Medicine, Iwate Medical University School of Medicine, Morioka, Iwate, Japan
| | - Takafumi Kubota
- Departments of Epileptology, Tohoku University Graduate School of Medicine, Sendai, Miyagi, Japan; Departments of Neurology, Tohoku University Graduate School of Medicine, Sendai, Miyagi, Japan
| | - Temma Soga
- Departments of Epileptology, Tohoku University Graduate School of Medicine, Sendai, Miyagi, Japan; Departments of Neurology, Tohoku University Graduate School of Medicine, Sendai, Miyagi, Japan
| | - Kazushi Ukishiro
- Departments of Epileptology, Tohoku University Graduate School of Medicine, Sendai, Miyagi, Japan
| | - Masashi Aoki
- Departments of Neurology, Tohoku University Graduate School of Medicine, Sendai, Miyagi, Japan
| | - Nobukazu Nakasato
- Departments of Epileptology, Tohoku University Graduate School of Medicine, Sendai, Miyagi, Japan
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Najafi P, Reimer C, Gilthorpe JD, Jacobsen KR, Ramløse M, Paul NF, Simianer H, Tetens J, Falker-Gieske C. Genomic evidence for the suitability of Göttingen Minipigs with a rare seizure phenotype as a model for human epilepsy. Neurogenetics 2024; 25:103-117. [PMID: 38383918 PMCID: PMC11076379 DOI: 10.1007/s10048-024-00750-2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/29/2023] [Accepted: 02/02/2024] [Indexed: 02/23/2024]
Abstract
Epilepsy is a complex genetic disorder that affects about 2% of the global population. Although the frequency and severity of epileptic seizures can be reduced by a range of pharmacological interventions, there are no disease-modifying treatments for epilepsy. The development of new and more effective drugs is hindered by a lack of suitable animal models. Available rodent models may not recapitulate all key aspects of the disease. Spontaneous epileptic convulsions were observed in few Göttingen Minipigs (GMPs), which may provide a valuable alternative animal model for the characterisation of epilepsy-type diseases and for testing new treatments. We have characterised affected GMPs at the genome level and have taken advantage of primary fibroblast cultures to validate the functional impact of fixed genetic variants on the transcriptome level. We found numerous genes connected to calcium metabolism that have not been associated with epilepsy before, such as ADORA2B, CAMK1D, ITPKB, MCOLN2, MYLK, NFATC3, PDGFD, and PHKB. Our results have identified two transcription factor genes, EGR3 and HOXB6, as potential key regulators of CACNA1H, which was previously linked to epilepsy-type disorders in humans. Our findings provide the first set of conclusive results to support the use of affected subsets of GMPs as an alternative and more reliable model system to study human epilepsy. Further neurological and pharmacological validation of the suitability of GMPs as an epilepsy model is therefore warranted.
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Affiliation(s)
- Pardis Najafi
- Department of Animal Sciences, Georg-August-University, Burckhardtweg 2, 37077, Göttingen, Germany
- Center for Integrated Breeding Research, Georg-August-University, Albrecht-Thaer-Weg 3, 37075, Göttingen, Germany
| | - Christian Reimer
- Center for Integrated Breeding Research, Georg-August-University, Albrecht-Thaer-Weg 3, 37075, Göttingen, Germany
- Friedrich-Loeffler-Institute, Federal Research Institute for Animal Health, Höltystr. 10, 31535, Neustadt, Germany
| | - Jonathan D Gilthorpe
- Department of Integrative Medical Biology, Umeå University, 901 87, Umeå, Sweden
| | - Kirsten R Jacobsen
- Ellegaard Göttingen Minipigs A/S, Sorø Landevej 302, 4261, Dalmose, Denmark
| | - Maja Ramløse
- Ellegaard Göttingen Minipigs A/S, Sorø Landevej 302, 4261, Dalmose, Denmark
| | - Nora-Fabienne Paul
- Department of Animal Sciences, Georg-August-University, Burckhardtweg 2, 37077, Göttingen, Germany
| | - Henner Simianer
- Department of Animal Sciences, Georg-August-University, Burckhardtweg 2, 37077, Göttingen, Germany
- Center for Integrated Breeding Research, Georg-August-University, Albrecht-Thaer-Weg 3, 37075, Göttingen, Germany
| | - Jens Tetens
- Department of Animal Sciences, Georg-August-University, Burckhardtweg 2, 37077, Göttingen, Germany
- Center for Integrated Breeding Research, Georg-August-University, Albrecht-Thaer-Weg 3, 37075, Göttingen, Germany
| | - Clemens Falker-Gieske
- Department of Animal Sciences, Georg-August-University, Burckhardtweg 2, 37077, Göttingen, Germany.
- Center for Integrated Breeding Research, Georg-August-University, Albrecht-Thaer-Weg 3, 37075, Göttingen, Germany.
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Zhang MW, Liang XY, Wang J, Gao LD, Liao HJ, He YH, Yi YH, He N, Liao WP. Epilepsy-associated genes: an update. Seizure 2024; 116:4-13. [PMID: 37777370 DOI: 10.1016/j.seizure.2023.09.021] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/10/2023] [Revised: 08/31/2023] [Accepted: 09/23/2023] [Indexed: 10/02/2023] Open
Abstract
PURPOSE To provide an updated list of epilepsy-associated genes based on clinical-genetic evidence. METHODS Epilepsy-associated genes were systematically searched and cross-checked from the OMIM, HGMD, and PubMed databases up to July 2023. To facilitate the reference for the epilepsy-associated genes that are potentially common in clinical practice, the epilepsy-associated genes were ranked by the mutation number in the HGMD database and by case number in the China Epilepsy Gene 1.0 project, which targeted common epilepsy. RESULTS Based on the OMIM database, 1506 genes were identified to be associated with epilepsy and were classified into three categories according to their potential association with epilepsy or other abnormal phenotypes, including 168 epilepsy genes that were associated with epilepsies as pure or core symptoms, 364 genes that were associated with neurodevelopmental disorders as the main symptom and epilepsy, and 974 epilepsy-related genes that were associated with gross physical/systemic abnormalities accompanied by epilepsy/seizures. Among the epilepsy genes, 115 genes (68.5%) were associated with epileptic encephalopathy. After cross-checking with the HGMD and PubMed databases, an additional 1440 genes were listed as potential epilepsy-associated genes, of which 278 genes have been repeatedly identified variants in patients with epilepsy. The top 100 frequently reported/identified epilepsy-associated genes from the HGMD database and the China Epilepsy Gene 1.0 project were listed, among which 40 genes were identical in both sources. SIGNIFICANCE Recognition of epilepsy-associated genes will facilitate genetic screening strategies and be helpful for precise molecular diagnosis and treatment of epilepsy in clinical practice.
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Affiliation(s)
- Meng-Wen Zhang
- Department of Neurology, Institute of Neuroscience, Key Laboratory of Neurogenetics and Channelopathies of Guangdong Province and the Ministry of Education of China, The Second Affiliated Hospital, Guangzhou Medical University, Guangzhou, 510260, China
| | - Xiao-Yu Liang
- Department of Neurology, Institute of Neuroscience, Key Laboratory of Neurogenetics and Channelopathies of Guangdong Province and the Ministry of Education of China, The Second Affiliated Hospital, Guangzhou Medical University, Guangzhou, 510260, China
| | - Jie Wang
- Department of Neurology, Institute of Neuroscience, Key Laboratory of Neurogenetics and Channelopathies of Guangdong Province and the Ministry of Education of China, The Second Affiliated Hospital, Guangzhou Medical University, Guangzhou, 510260, China
| | - Liang-Di Gao
- Department of Neurology, Institute of Neuroscience, Key Laboratory of Neurogenetics and Channelopathies of Guangdong Province and the Ministry of Education of China, The Second Affiliated Hospital, Guangzhou Medical University, Guangzhou, 510260, China
| | - Han-Jun Liao
- University of South China, Hengyang, 421001, China
| | - Yun-Hua He
- Department of Neurology, Institute of Neuroscience, Key Laboratory of Neurogenetics and Channelopathies of Guangdong Province and the Ministry of Education of China, The Second Affiliated Hospital, Guangzhou Medical University, Guangzhou, 510260, China
| | - Yong-Hong Yi
- Department of Neurology, Institute of Neuroscience, Key Laboratory of Neurogenetics and Channelopathies of Guangdong Province and the Ministry of Education of China, The Second Affiliated Hospital, Guangzhou Medical University, Guangzhou, 510260, China
| | - Na He
- Department of Neurology, Institute of Neuroscience, Key Laboratory of Neurogenetics and Channelopathies of Guangdong Province and the Ministry of Education of China, The Second Affiliated Hospital, Guangzhou Medical University, Guangzhou, 510260, China.
| | - Wei-Ping Liao
- Department of Neurology, Institute of Neuroscience, Key Laboratory of Neurogenetics and Channelopathies of Guangdong Province and the Ministry of Education of China, The Second Affiliated Hospital, Guangzhou Medical University, Guangzhou, 510260, China.
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Abdullah NM, Ali A. RYR2 receptor gene mutation associated with catecholaminergic polymorphic ventricular tachycardia in children: a case report & literature review. Transl Pediatr 2024; 13:359-369. [PMID: 38455755 PMCID: PMC10915435 DOI: 10.21037/tp-23-255] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/21/2023] [Accepted: 10/17/2023] [Indexed: 03/09/2024] Open
Abstract
Background Ryanodine receptor 2 (RYR2) gene mutation causing catecholaminergic polymorphic ventricular tachycardia (CPVT) is one of the identified causes of sudden death in adults and children. Case Description We report a case of RYR2 gene mutation presented with cardiac arrest and recurrent syncopal attack with accidental finding of cardiac tumour. For the systematic review, we used four databases (Scopus, PubMed, Ovid and Google Scholar) to search articles with the terms "RYR2 gene mutation" and "catecholaminergic polymorphic ventricular tachycardia (CPVT)". Fourteen studies were chosen and reviewed together with our reported patient. Most of the patients presented initially with syncopal attack and developed cardiac arrest later. Some of them presented with both syncopal attack and seizures precipitated by exercise or stress. We found that 43.8% of patients shared similar variants or coding effects in RYR2 gene mutation. Demographically, the mean age at presentation is 11 years old with 53% of reported cases were male. Conclusions Refractory arrhythmias cardiac arrest not responding to adrenaline should raise the suspicion towards RYR2 gene mutations. Recognition of this condition is important as it affects the outcome of resuscitation. Untimely diagnosis of RYR2 gene mutations with appropriate use of pharmacological agents during resuscitation is important to ensure a better outcome.
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Affiliation(s)
- Nur Mashitah Abdullah
- Department of Pediatrics, Hospital Pakar Kanak-Kanak (HPKK), The National University of Malaysia, Kuala Lumpur, Malaysia
| | - Adli Ali
- Department of Pediatrics, Hospital Pakar Kanak-Kanak (HPKK), The National University of Malaysia, Kuala Lumpur, Malaysia
- Research Centre, Hospital Pakar Kanak-Kanak (HPKK), The National University of Malaysia, Kuala Lumpur, Malaysia
- Institute of IR4.0, The National University of Malaysia, Bangi, Malaysia
- Infection and Immunology Health and Advanced Medicine Cluster, The National University of Malaysia, Cheras, Kuala Lumpur, Malaysia
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Bansal V, Winkelmann BR, Dietrich JW, Boehm BO. Whole-exome sequencing in familial type 2 diabetes identifies an atypical missense variant in the RyR2 gene. Front Endocrinol (Lausanne) 2024; 15:1258982. [PMID: 38444585 PMCID: PMC10913019 DOI: 10.3389/fendo.2024.1258982] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/14/2023] [Accepted: 01/10/2024] [Indexed: 03/07/2024] Open
Abstract
Genome-wide association studies have identified several hundred loci associated with type 2 diabetes mellitus (T2DM). Additionally, pathogenic variants in several genes are known to cause monogenic diabetes that overlaps clinically with T2DM. Whole-exome sequencing of related individuals with T2DM is a powerful approach to identify novel high-penetrance disease variants in coding regions of the genome. We performed whole-exome sequencing on four related individuals with T2DM - including one individual diagnosed at the age of 33 years. The individuals were negative for mutations in monogenic diabetes genes, had a strong family history of T2DM, and presented with several characteristics of metabolic syndrome. A missense variant (p.N2291D) in the type 2 ryanodine receptor (RyR2) gene was one of eight rare coding variants shared by all individuals. The variant was absent in large population databases and affects a highly conserved amino acid located in a mutational hotspot for pathogenic variants in Catecholaminergic polymorphic ventricular tachycardia (CPVT). Electrocardiogram data did not reveal any cardiac abnormalities except a lower-than-normal resting heart rate (< 60 bpm) in two individuals - a phenotype observed in CPVT individuals with RyR2 mutations. RyR2-mediated Ca2+ release contributes to glucose-mediated insulin secretion and pathogenic RyR2 mutations cause glucose intolerance in humans and mice. Analysis of glucose tolerance testing data revealed that missense mutations in a CPVT mutation hotspot region - overlapping the p.N2291D variant - are associated with complete penetrance for glucose intolerance. In conclusion, we have identified an atypical missense variant in the RyR2 gene that co-segregates with diabetes in the absence of overt CPVT.
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Affiliation(s)
- Vikas Bansal
- Department of Pediatrics, University of California San Diego, La Jolla, CA, United States
- Institute of Genomic Medicine, University of California San Diego, La Jolla, CA, United States
| | | | - Johannes W Dietrich
- Diabetes, Endocrinology and Metabolism Section, Department of Internal Medicine I, St. Josef Hospital, Ruhr University Hospitals, Bochum, Germany
- Diabetes Center Bochum-Hattingen, St. Elisabeth-Hospital Blankenstein, Hattingen, Germany
- Center for Rare Endocrine Diseases, Ruhr Center for Rare Diseases (CeSER), Ruhr University Bochum and Witten/Herdecke University, Bochum, Germany
- Center for Diabetes Technology, Catholic Hospitals Bochum, Bochum, Germany
| | - Bernhard O Boehm
- Lee Kong Chian School of Medicine, Nanyang Technological University, Singapore, Singapore
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Smith J, Richerson G, Kouchi H, Duprat F, Mantegazza M, Bezin L, Rheims S. Are we there yet? A critical evaluation of sudden and unexpected death in epilepsy models. Epilepsia 2024; 65:9-25. [PMID: 37914406 DOI: 10.1111/epi.17812] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/04/2023] [Revised: 10/11/2023] [Accepted: 10/31/2023] [Indexed: 11/03/2023]
Abstract
Although animal models have helped to elaborate meaningful hypotheses about the pathophysiology of sudden and unexpected death in epilepsy (SUDEP), specific prevention strategies are still lacking, potentially reflecting the limitations of these models and the intrinsic difficulties of investigating SUDEP. The interpretation of preclinical data and their translation to diagnostic and therapeutic developments in patients thus require a high level of confidence in their relevance to model the human situation. Preclinical models of SUDEP are heterogeneous and include rodent and nonrodent species. A critical aspect is whether the animals have isolated seizures exclusively induced by a specific trigger, such as models where seizures are elicited by electrical stimulation, pharmacological intervention, or DBA mouse strains, or whether they suffer from epilepsy with spontaneous seizures, with or without spontaneous SUDEP, either of nongenetic epilepsy etiology or from genetically based developmental and epileptic encephalopathies. All these models have advantages and potential disadvantages, but it is important to be aware of these limitations to interpret data appropriately in a translational perspective. The majority of models with spontaneous seizures are of a genetic basis, whereas SUDEP cases with a genetic basis represent only a small proportion of the total number. In almost all models, cardiorespiratory arrest occurs during the course of the seizure, contrary to that in patients observed at the time of death, potentially raising the issue of whether we are studying models of SUDEP or models of periseizure death. However, some of these limitations are impossible to avoid and can in part be dependent on specific features of SUDEP, which may be difficult to model. Several preclinical tools are available to address certain gaps in SUDEP pathophysiology, which can be used to further validate current preclinical models.
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Affiliation(s)
- Jonathon Smith
- Lyon Neuroscience Research Center (CRNL, INSERM U1028/CNRS UMR 5292, Lyon 1 University), Lyon, France
| | - George Richerson
- Department of Neurology, University of Iowa, Iowa City, Iowa, USA
| | - Hayet Kouchi
- Lyon Neuroscience Research Center (CRNL, INSERM U1028/CNRS UMR 5292, Lyon 1 University), Lyon, France
| | - Fabrice Duprat
- University Cote d'Azur, Valbonne-Sophia Antipolis, France
- CNRS UMR 7275, Institute of Molecular and Cellular Pharmacology, Valbonne-Sophia Antipolis, France
- Inserm, Valbonne-Sophia Antipolis, France
| | - Massimo Mantegazza
- University Cote d'Azur, Valbonne-Sophia Antipolis, France
- CNRS UMR 7275, Institute of Molecular and Cellular Pharmacology, Valbonne-Sophia Antipolis, France
- Inserm, Valbonne-Sophia Antipolis, France
| | - Laurent Bezin
- Lyon Neuroscience Research Center (CRNL, INSERM U1028/CNRS UMR 5292, Lyon 1 University), Lyon, France
| | - Sylvain Rheims
- Lyon Neuroscience Research Center (CRNL, INSERM U1028/CNRS UMR 5292, Lyon 1 University), Lyon, France
- Department of Functional Neurology and Epileptology, Hospices Civils de Lyon and Lyon 1 University, Lyon, France
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Kotta M, Torchio M, Bayliss P, Cohen MC, Quarrell O, Wheeldon N, Marton T, Gentilini D, Crotti L, Coombs RC, Schwartz PJ. Cardiac Genetic Investigation of Sudden Infant and Early Childhood Death: A Study From Victims to Families. J Am Heart Assoc 2023; 12:e029100. [PMID: 37589201 PMCID: PMC10547337 DOI: 10.1161/jaha.122.029100] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/03/2023] [Accepted: 06/27/2023] [Indexed: 08/18/2023]
Abstract
Background Sudden infant death syndrome (SIDS) is the leading cause of death up to age 1. Sudden unexplained death in childhood (SUDC) is similar but affects mostly toddlers aged 1 to 4. SUDC is rarer than SIDS, and although cardiogenetic testing (molecular autopsy) identifies an underlying cause in a fraction of SIDS, less is known about SUDC. Methods and Results Seventy-seven SIDS and 16 SUDC cases underwent molecular autopsy with 25 definitive-evidence arrhythmia-associated genes. In 18 cases, another 76 genes with varying degrees of evidence were analyzed. Parents were offered cascade screening. Double-blind review of clinical-genetic data established genotype-phenotype correlations. The yield of likely pathogenic variants in the 25 genes was higher in SUDC than in SIDS (18.8% [3/16] versus 2.6% [2/77], respectively; P=0.03), whereas novel/ultra-rare variants of uncertain significance were comparably represented. Rare variants of uncertain significance and likely benign variants were found only in SIDS. In cases with expanded analyses, likely pathogenic/likely benign variants stemmed only from definitive-evidence genes, whereas all other genes contributed only variants of uncertain significance. Among 24 parents screened, variant status and phenotype largely agreed, and 3 cases positively correlated for cardiac channelopathies. Genotype-phenotype correlations significantly aided variant adjudication. Conclusions Genetic yield is higher in SUDC than in SIDS although, in both, it is contributed only by definitive-evidence genes. SIDS/SUDC cascade family screening facilitates establishment or dismissal of a diagnosis through definitive variant adjudication indicating that anonymity is no longer justifiable. Channelopathies may underlie a relevant fraction of SUDC. Binary classifications of genetic causality (pathogenic versus benign) could not always be adequate.
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Affiliation(s)
- Maria‐Christina Kotta
- Center for Cardiac Arrhythmias of Genetic Origin and Laboratory of Cardiovascular GeneticsIRCCS Istituto Auxologico ItalianoMilanItaly
| | - Margherita Torchio
- Center for Cardiac Arrhythmias of Genetic Origin and Laboratory of Cardiovascular GeneticsIRCCS Istituto Auxologico ItalianoMilanItaly
| | - Pauline Bayliss
- Department of Clinical GeneticsSheffield Children’s NHS Foundation TrustSheffieldUnited Kingdom
| | - Marta C. Cohen
- Department of HistopathologySheffield Children’s NHS Foundation TrustSheffieldUnited Kingdom
| | - Oliver Quarrell
- Sheffield Children’s Hospital NHS Foundation TrustSheffieldUnited Kingdom
- Department of NeurosciencesUniversity of SheffieldSheffieldUnited Kingdom
| | - Nigel Wheeldon
- Cardiothoracic CentreNorthern General Hospital, Sheffield Teaching Hospitals NHS TrustSheffieldUnited Kingdom
| | - Tamás Marton
- Cellular Pathology DepartmentBirmingham Women’s and Children’s HospitalBirminghamUnited Kingdom
| | - Davide Gentilini
- Bioinformatics and Statistical Genetics UnitIRCCS Istituto Auxologico ItalianoMilanItaly
| | - Lia Crotti
- Center for Cardiac Arrhythmias of Genetic Origin and Laboratory of Cardiovascular GeneticsIRCCS Istituto Auxologico ItalianoMilanItaly
- Department of Medicine and SurgeryUniversity of Milano‐BicoccaMilanItaly
| | - Robert C. Coombs
- Department of NeonatologySheffield Teaching Hospitals. NHS TrustSheffieldUnited Kingdom
| | - Peter J. Schwartz
- Center for Cardiac Arrhythmias of Genetic Origin and Laboratory of Cardiovascular GeneticsIRCCS Istituto Auxologico ItalianoMilanItaly
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Stevelink R, Campbell C, Chen S, Abou-Khalil B, Adesoji OM, Afawi Z, Amadori E, Anderson A, Anderson J, Andrade DM, Annesi G, Auce P, Avbersek A, Bahlo M, Baker MD, Balagura G, Balestrini S, Barba C, Barboza K, Bartolomei F, Bast T, Baum L, Baumgartner T, Baykan B, Bebek N, Becker AJ, Becker F, Bennett CA, Berghuis B, Berkovic SF, Beydoun A, Bianchini C, Bisulli F, Blatt I, Bobbili DR, Borggraefe I, Bosselmann C, Braatz V, Bradfield JP, Brockmann K, Brody LC, Buono RJ, Busch RM, Caglayan H, Campbell E, Canafoglia L, Canavati C, Cascino GD, Castellotti B, Catarino CB, Cavalleri GL, Cerrato F, Chassoux F, Cherny SS, Cheung CL, Chinthapalli K, Chou IJ, Chung SK, Churchhouse C, Clark PO, Cole AJ, Compston A, Coppola A, Cosico M, Cossette P, Craig JJ, Cusick C, Daly MJ, Davis LK, de Haan GJ, Delanty N, Depondt C, Derambure P, Devinsky O, Di Vito L, Dlugos DJ, Doccini V, Doherty CP, El-Naggar H, Elger CE, Ellis CA, Eriksson JG, Faucon A, Feng YCA, Ferguson L, Ferraro TN, Ferri L, Feucht M, Fitzgerald M, Fonferko-Shadrach B, Fortunato F, Franceschetti S, Franke A, French JA, Freri E, Gagliardi M, Gambardella A, Geller EB, Giangregorio T, Gjerstad L, Glauser T, Goldberg E, Goldman A, Granata T, Greenberg DA, Guerrini R, Gupta N, Haas KF, Hakonarson H, Hallmann K, Hassanin E, Hegde M, Heinzen EL, Helbig I, Hengsbach C, Heyne HO, Hirose S, Hirsch E, Hjalgrim H, Howrigan DP, Hucks D, Hung PC, Iacomino M, Imbach LL, Inoue Y, Ishii A, Jamnadas-Khoda J, Jehi L, Johnson MR, Kälviäinen R, Kamatani Y, Kanaan M, Kanai M, Kantanen AM, Kara B, Kariuki SM, Kasperavičiūte D, Kasteleijn-Nolst Trenite D, Kato M, Kegele J, Kesim Y, Khoueiry-Zgheib N, King C, Kirsch HE, Klein KM, Kluger G, Knake S, Knowlton RC, Koeleman BPC, Korczyn AD, Koupparis A, Kousiappa I, Krause R, Krenn M, Krestel H, Krey I, Kunz WS, Kurki MI, Kurlemann G, Kuzniecky R, Kwan P, Labate A, Lacey A, Lal D, Landoulsi Z, Lau YL, Lauxmann S, Leech SL, Lehesjoki AE, Lemke JR, Lerche H, Lesca G, Leu C, Lewin N, Lewis-Smith D, Li GHY, Li QS, Licchetta L, Lin KL, Lindhout D, Linnankivi T, Lopes-Cendes I, Lowenstein DH, Lui CHT, Madia F, Magnusson S, Marson AG, May P, McGraw CM, Mei D, Mills JL, Minardi R, Mirza N, Møller RS, Molloy AM, Montomoli M, Mostacci B, Muccioli L, Muhle H, Müller-Schlüter K, Najm IM, Nasreddine W, Neale BM, Neubauer B, Newton CRJC, Nöthen MM, Nothnagel M, Nürnberg P, O’Brien TJ, Okada Y, Ólafsson E, Oliver KL, Özkara C, Palotie A, Pangilinan F, Papacostas SS, Parrini E, Pato CN, Pato MT, Pendziwiat M, Petrovski S, Pickrell WO, Pinsky R, Pippucci T, Poduri A, Pondrelli F, Powell RHW, Privitera M, Rademacher A, Radtke R, Ragona F, Rau S, Rees MI, Regan BM, Reif PS, Rhelms S, Riva A, Rosenow F, Ryvlin P, Saarela A, Sadleir LG, Sander JW, Sander T, Scala M, Scattergood T, Schachter SC, Schankin CJ, Scheffer IE, Schmitz B, Schoch S, Schubert-Bast S, Schulze-Bonhage A, Scudieri P, Sham P, Sheidley BR, Shih JJ, Sills GJ, Sisodiya SM, Smith MC, Smith PE, Sonsma ACM, Speed D, Sperling MR, Stefansson H, Stefansson K, Steinhoff BJ, Stephani U, Stewart WC, Stipa C, Striano P, Stroink H, Strzelczyk A, Surges R, Suzuki T, Tan KM, Taneja RS, Tanteles GA, Taubøll E, Thio LL, Thomas GN, Thomas RH, Timonen O, Tinuper P, Todaro M, Topaloğlu P, Tozzi R, Tsai MH, Tumiene B, Turkdogan D, Unnsteinsdóttir U, Utkus A, Vaidiswaran P, Valton L, van Baalen A, Vetro A, Vining EPG, Visscher F, von Brauchitsch S, von Wrede R, Wagner RG, Weber YG, Weckhuysen S, Weisenberg J, Weller M, Widdess-Walsh P, Wolff M, Wolking S, Wu D, Yamakawa K, Yang W, Yapıcı Z, Yücesan E, Zagaglia S, Zahnert F, Zara F, Zhou W, Zimprich F, Zsurka G, Zulfiqar Ali Q. GWAS meta-analysis of over 29,000 people with epilepsy identifies 26 risk loci and subtype-specific genetic architecture. Nat Genet 2023; 55:1471-1482. [PMID: 37653029 PMCID: PMC10484785 DOI: 10.1038/s41588-023-01485-w] [Citation(s) in RCA: 20] [Impact Index Per Article: 20.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/07/2022] [Accepted: 07/21/2023] [Indexed: 09/02/2023]
Abstract
Epilepsy is a highly heritable disorder affecting over 50 million people worldwide, of which about one-third are resistant to current treatments. Here we report a multi-ancestry genome-wide association study including 29,944 cases, stratified into three broad categories and seven subtypes of epilepsy, and 52,538 controls. We identify 26 genome-wide significant loci, 19 of which are specific to genetic generalized epilepsy (GGE). We implicate 29 likely causal genes underlying these 26 loci. SNP-based heritability analyses show that common variants explain between 39.6% and 90% of genetic risk for GGE and its subtypes. Subtype analysis revealed markedly different genetic architectures between focal and generalized epilepsies. Gene-set analyses of GGE signals implicate synaptic processes in both excitatory and inhibitory neurons in the brain. Prioritized candidate genes overlap with monogenic epilepsy genes and with targets of current antiseizure medications. Finally, we leverage our results to identify alternate drugs with predicted efficacy if repurposed for epilepsy treatment.
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Ye T, Zhang J, Wang J, Lan S, Zeng T, Wang H, He X, Li BM, Deng W, Liao WP, Liu XR. Variants in BSN gene associated with epilepsy with favourable outcome. J Med Genet 2023; 60:776-783. [PMID: 36600631 PMCID: PMC10439262 DOI: 10.1136/jmg-2022-108865] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/11/2022] [Accepted: 11/24/2022] [Indexed: 12/14/2022]
Abstract
BACKGROUND BSN gene encodes Bassoon, an essential protein to assemble the cytomatrix at the active zone of neurotransmitter release. This study aims to explore the relationship between BSN variants and epilepsy. METHODS Whole-exome sequencing was performed in a cohort of 313 cases (trios) with epilepsies of unknown causes. Additional cases with BSN variants were collected from China Epilepsy Gene V.1.0 Matching Platform. The Clinical Validity Framework of ClinGen was used to evaluate the relationship between BSN variants and epilepsy. RESULTS Four pairs of compound heterozygous variants and one cosegregating heterozygous missense variant in BSN were identified in five unrelated families. These variants presented statistically higher frequency in the case cohort than in controls. Additional two de novo heterozygous nonsense variants and one cosegregating heterozygous missense variant were identified in three unrelated cases from the gene matching platform, which were not present in the Genome Aggregation Database. The missense variants tended to be located in C-terminus, including the two monoallelic missense variants. Protein modelling showed that at least one missense variant in each pair of compound heterozygous variants had hydrogen bond alterations. Clinically, two cases were diagnosed as idiopathic generalised epilepsy, two as focal epilepsy and the remaining four as epilepsy with febrile seizures plus. Seven out of eight probands showed infancy or childhood-onset epilepsy. Eight out of 10 affected individuals had a history of febrile convulsions. All the cases were seizure-free. The cases with monoallelic variants achieved seizure-free without treatment or under monotherapy, while cases with biallelic missense variants mostly required combined therapy. The evidence from ClinGen Framework suggested an association between BSN variants and epilepsy. CONCLUSION The BSN gene was potentially a novel candidate gene for epilepsy. The phenotypical severity was associated with the genotypes and the molecular subregional effects of the variants.
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Affiliation(s)
- Tingting Ye
- Department of Neurology, Institute of Neuroscience, Key Laboratory of Neurogenetics and Channelopathies of Guangdong Province and the Ministry of Education of China, The Second Affiliated Hospital, Guangzhou Medical University, Guangzhou, China
| | - Jiwei Zhang
- Department of Neurology, The First Affiliated Hospital of Zhengzhou University, Zhengzhou, Henan, China
| | - Jie Wang
- Department of Neurology, Institute of Neuroscience, Key Laboratory of Neurogenetics and Channelopathies of Guangdong Province and the Ministry of Education of China, The Second Affiliated Hospital, Guangzhou Medical University, Guangzhou, China
| | - Song Lan
- Department of Neurology, Maoming People's Hospital, Maoming, Guangdong, China
| | - Tao Zeng
- Department of Neurology, Guangzhou First People's Hospital, Guangzhou, China
| | - Huaili Wang
- Department of Pediatrics, The First Affiliated Hospital of Zhengzhou University, Zhengzhou, Henan, China
| | - Xuelian He
- Precision Medical Center, Wuhan Childrens Hospital, Wuhan, China
| | - Bing-Mei Li
- Department of Neurology, Institute of Neuroscience, Key Laboratory of Neurogenetics and Channelopathies of Guangdong Province and the Ministry of Education of China, The Second Affiliated Hospital, Guangzhou Medical University, Guangzhou, China
| | - Weiwen Deng
- Department of Neurology, Institute of Neuroscience, Key Laboratory of Neurogenetics and Channelopathies of Guangdong Province and the Ministry of Education of China, The Second Affiliated Hospital, Guangzhou Medical University, Guangzhou, China
| | - Wei-Ping Liao
- Department of Neurology, Institute of Neuroscience, Key Laboratory of Neurogenetics and Channelopathies of Guangdong Province and the Ministry of Education of China, The Second Affiliated Hospital, Guangzhou Medical University, Guangzhou, China
| | - Xiao-Rong Liu
- Department of Neurology, Institute of Neuroscience, Key Laboratory of Neurogenetics and Channelopathies of Guangdong Province and the Ministry of Education of China, The Second Affiliated Hospital, Guangzhou Medical University, Guangzhou, China
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12
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Liu C, Zhao XM, Wang Q, Du TT, Zhang MX, Wang HZ, Li RP, Liang K, Gao Y, Zhou SY, Xue T, Zhang JG, Han CL, Shi L, Zhang LW, Meng FG. Astrocyte-derived SerpinA3N promotes neuroinflammation and epileptic seizures by activating the NF-κB signaling pathway in mice with temporal lobe epilepsy. J Neuroinflammation 2023; 20:161. [PMID: 37422673 DOI: 10.1186/s12974-023-02840-8] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/14/2022] [Accepted: 06/22/2023] [Indexed: 07/10/2023] Open
Abstract
Impaired activation and regulation of the extinction of inflammatory cells and molecules in injured neuronal tissues are key factors in the development of epilepsy. SerpinA3N is mainly associated with the acute phase response and inflammatory response. In our current study, transcriptomics analysis, proteomics analysis, and Western blotting showed that the expression level of Serpin clade A member 3N (SerpinA3N) is significantly increased in the hippocampus of mice with kainic acid (KA)-induced temporal lobe epilepsy, and this molecule is mainly expressed in astrocytes. Notably, in vivo studies using gain- and loss-of-function approaches revealed that SerpinA3N in astrocytes promoted the release of proinflammatory factors and aggravated seizures. Mechanistically, RNA sequencing and Western blotting showed that SerpinA3N promoted KA-induced neuroinflammation by activating the NF-κB signaling pathway. In addition, co-immunoprecipitation revealed that SerpinA3N interacts with ryanodine receptor type 2 (RYR2) and promotes RYR2 phosphorylation. Overall, our study reveals a novel SerpinA3N-mediated mechanism in seizure-induced neuroinflammation and provides a new target for developing neuroinflammation-based strategies to reduce seizure-induced brain injury.
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Affiliation(s)
- Chong Liu
- Beijing Neurosurgical Institute, Capital Medical University, Beijing, 100070, China
- Beijing Key Laboratory of Neurostimulation, Beijing, 100070, China
| | - Xue-Min Zhao
- Beijing Neurosurgical Institute, Capital Medical University, Beijing, 100070, China
| | - Qiao Wang
- Beijing Neurosurgical Institute, Capital Medical University, Beijing, 100070, China
- Beijing Key Laboratory of Neurostimulation, Beijing, 100070, China
| | - Ting-Ting Du
- Beijing Neurosurgical Institute, Capital Medical University, Beijing, 100070, China
| | - Mo-Xuan Zhang
- Beijing Neurosurgical Institute, Capital Medical University, Beijing, 100070, China
- Beijing Key Laboratory of Neurostimulation, Beijing, 100070, China
| | - Hui-Zhi Wang
- Beijing Neurosurgical Institute, Capital Medical University, Beijing, 100070, China
- Beijing Key Laboratory of Neurostimulation, Beijing, 100070, China
| | - Ren-Peng Li
- Beijing Neurosurgical Institute, Capital Medical University, Beijing, 100070, China
- Beijing Key Laboratory of Neurostimulation, Beijing, 100070, China
| | - Kun Liang
- Beijing Neurosurgical Institute, Capital Medical University, Beijing, 100070, China
- Beijing Key Laboratory of Neurostimulation, Beijing, 100070, China
| | - Yuan Gao
- Beijing Neurosurgical Institute, Capital Medical University, Beijing, 100070, China
- Beijing Key Laboratory of Neurostimulation, Beijing, 100070, China
| | - Si-Yu Zhou
- Beijing Neurosurgical Institute, Capital Medical University, Beijing, 100070, China
- Beijing Key Laboratory of Neurostimulation, Beijing, 100070, China
| | - Tao Xue
- Beijing Tiantan Hospital, Capital Medical University, No. 119 South Fourth Ring West Road, Fengtai District, Beijing, 100070, China
| | - Jian-Guo Zhang
- Beijing Neurosurgical Institute, Capital Medical University, Beijing, 100070, China
- Beijing Key Laboratory of Neurostimulation, Beijing, 100070, China
- Beijing Tiantan Hospital, Capital Medical University, No. 119 South Fourth Ring West Road, Fengtai District, Beijing, 100070, China
| | - Chun-Lei Han
- Beijing Key Laboratory of Neurostimulation, Beijing, 100070, China.
- Beijing Tiantan Hospital, Capital Medical University, No. 119 South Fourth Ring West Road, Fengtai District, Beijing, 100070, China.
| | - Lin Shi
- Beijing Neurosurgical Institute, Capital Medical University, Beijing, 100070, China.
- Beijing Key Laboratory of Neurostimulation, Beijing, 100070, China.
- Beijing Tiantan Hospital, Capital Medical University, No. 119 South Fourth Ring West Road, Fengtai District, Beijing, 100070, China.
| | - Liang-Wen Zhang
- Beijing Tiantan Hospital, Capital Medical University, No. 119 South Fourth Ring West Road, Fengtai District, Beijing, 100070, China.
- Department of Neurosurgery, Shandong Provincial Hospital Affiliated to Shandong First Medical University, Jinan, 250021, Shandong, China.
| | - Fan-Gang Meng
- Beijing Neurosurgical Institute, Capital Medical University, Beijing, 100070, China.
- Beijing Key Laboratory of Neurostimulation, Beijing, 100070, China.
- Beijing Tiantan Hospital, Capital Medical University, No. 119 South Fourth Ring West Road, Fengtai District, Beijing, 100070, China.
- Chinese Institute for Brain Research, Beijing, 102206, China.
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Halász P, Szũcs A. Self-limited childhood epilepsies are disorders of the perisylvian communication system, carrying the risk of progress to epileptic encephalopathies-Critical review. Front Neurol 2023; 14:1092244. [PMID: 37388546 PMCID: PMC10301767 DOI: 10.3389/fneur.2023.1092244] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/07/2022] [Accepted: 04/04/2023] [Indexed: 07/01/2023] Open
Abstract
"Sleep plasticity is a double-edged sword: a powerful machinery of neural build-up, with a risk to epileptic derailment." We aimed to review the types of self-limited focal epilepsies..."i.e. keep as two separate paragraphs" We aimed to review the types of self-limited focal epilepsies: (1) self-limited focal childhood epilepsy with centrotemporal spikes, (2) atypical Rolandic epilepsy, and (3) electrical status epilepticus in sleep with mental consequences, including Landau-Kleffner-type acquired aphasia, showing their spectral relationship and discussing the debated topics. Our endeavor is to support the system epilepsy concept in this group of epilepsies, using them as models for epileptogenesis in general. The spectral continuity of the involved conditions is evidenced by several features: language impairment, the overarching presence of centrotemporal spikes and ripples (with changing electromorphology across the spectrum), the essential timely and spatial independence of interictal epileptic discharges from seizures, NREM sleep relatedness, and the existence of the intermediate-severity "atypical" forms. These epilepsies might be the consequences of a genetically determined transitory developmental failure, reflected by widespread neuropsychological symptoms originating from the perisylvian network that have distinct time and space relations from secondary epilepsy itself. The involved epilepsies carry the risk of progression to severe, potentially irreversible encephalopathic forms.
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Affiliation(s)
- Péter Halász
- Department of Neurology, University Medical School, Pécs, Hungary
| | - Anna Szũcs
- Institute of Behavioral Sciences, Semmelweis University, Budapest, Hungary
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Petrungaro M, Scarà A, Borrelli A, Sciarra L. CPVT and Complete Atrio-Ventricular Block: The Flipside of the Same Coin. J Cardiovasc Dev Dis 2023; 10:jcdd10030097. [PMID: 36975861 PMCID: PMC10054025 DOI: 10.3390/jcdd10030097] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/29/2022] [Revised: 02/17/2023] [Accepted: 02/21/2023] [Indexed: 02/25/2023] Open
Abstract
Catecholaminergic Polymorphic Ventricular Tachycardia (CPVT) is a rare electrical genetic disease characterized by ventricular polymorphic tachycardia and/or bidirectional ventricular tachycardia induced by the release of catecholamines caused by intense physical or emotional stress in structurally normal hearts. Mostly, it is caused by mutations in genes that are involved in calcium homeostasis, in particular in the gene encoding for cardiac ryanodine receptor (RyR2). Our observation is the first description of familial CPVT caused by mutation of the RyR2 gene, linked to the complete AV block.
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Affiliation(s)
- Mattia Petrungaro
- Unit of Electrophysiology, Belcolle Hospital, 01100 Viterbo, Italy
- Department of Clinical and Molecular Medicine, Sapienza University of Rome, 00100 Rome, Italy
- Correspondence:
| | - Antonio Scarà
- Unit of Cardiology and Electrophysiology, San Carlo di Nancy Hospital, 00100 Rome, Italy
| | - Alessio Borrelli
- Unit of Cardiology and Electrophysiology, San Carlo di Nancy Hospital, 00100 Rome, Italy
| | - Luigi Sciarra
- Department of Life, Health and Environmental Sciences, University of L’Aquila, 67100 L’Aquila, Italy
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15
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Yin Y, Wang F, Ma Y, Yang J, Li R, Li Y, Wang J, Liu H. Structural and functional changes in drug-naïve benign childhood epilepsy with centrotemporal spikes and their associated gene expression profiles. Cereb Cortex 2022; 33:5774-5782. [PMID: 36444721 PMCID: PMC10183734 DOI: 10.1093/cercor/bhac458] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/05/2022] [Revised: 10/27/2022] [Accepted: 10/28/2022] [Indexed: 11/30/2022] Open
Abstract
Abstract
Benign epilepsy with centrotemporal spikes (BECTS) is a common pediatric epilepsy syndrome that has been widely reported to show abnormal brain structure and function. However, the genetic mechanisms underlying structural and functional changes remain largely unknown. Based on the structural and resting-state functional magnetic resonance imaging data of 22 drug-naïve children with BECTS and 33 healthy controls, we conducted voxel-based morphology (VBM) and fractional amplitude of low-frequency fluctuation (fALFF) analyses to compare cortical morphology and spontaneous brain activity between the 2 groups. In combination with the Allen Human Brain Atlas, transcriptome-neuroimaging spatial correlation analyses were applied to explore gene expression profiles associated with gray matter volume (GMV) and fALFF changes in BECTS. VBM analysis demonstrated significantly increased GMV in the right brainstem and right middle cingulate gyrus in BECTS. Moreover, children with BECTS exhibited significantly increased fALFF in left temporal pole, while decreased fALFF in right thalamus and left precuneus. These brain structural and functional alterations were closely related to behavioral and cognitive deficits, and the fALFF-linked gene expression profiles were enriched in voltage-gated ion channel and synaptic activity as well as neuron projection. Our findings suggest that brain morphological and functional abnormalities in children with BECTS involve complex polygenic genetic mechanisms.
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Affiliation(s)
- Yu Yin
- Department of Radiology, Affiliated Hospital of Zunyi Medical University, Medical Imaging Center of Guizhou Province , Zunyi 563003 , China
| | - Fuqin Wang
- Department of Radiology, Affiliated Hospital of Zunyi Medical University, Medical Imaging Center of Guizhou Province , Zunyi 563003 , China
| | - Yingzi Ma
- State Key Laboratory of Primate Biomedical Research, Institute of Primate Translational Medicine, Kunming University of Science and Technology , Kunming 650500 , China
- Yunnan Key Laboratory of Primate Biomedical Research , Kunming 650500, Yunnan , China
| | - Jia Yang
- State Key Laboratory of Primate Biomedical Research, Institute of Primate Translational Medicine, Kunming University of Science and Technology , Kunming 650500 , China
- Yunnan Key Laboratory of Primate Biomedical Research , Kunming 650500, Yunnan , China
| | - Rui Li
- School of Electrical Engineering and Electronic Information, Xihua University , Chengdu 610039 , China
| | - Yuanyuan Li
- School of Life Science and Technology, University of Electronic Science and Technology of China , Chengdu 625014 , China
| | - Jiaojian Wang
- State Key Laboratory of Primate Biomedical Research, Institute of Primate Translational Medicine, Kunming University of Science and Technology , Kunming 650500 , China
- Yunnan Key Laboratory of Primate Biomedical Research , Kunming 650500, Yunnan , China
| | - Heng Liu
- Department of Radiology, Affiliated Hospital of Zunyi Medical University, Medical Imaging Center of Guizhou Province , Zunyi 563003 , China
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Zhou X, Chen Z, Xiao L, Zhong Y, Liu Y, Wu J, Tao H. Intracellular calcium homeostasis and its dysregulation underlying epileptic seizures. Seizure 2022; 103:126-136. [DOI: 10.1016/j.seizure.2022.11.007] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/13/2022] [Revised: 10/25/2022] [Accepted: 11/10/2022] [Indexed: 11/13/2022] Open
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17
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Acharya S, Devkota P, Shrestha R, Bajracharya AK, Jesmajian S. Catecholaminergic Polymorphic Ventricular Tachycardia Presented As Generalized Tonic-Clonic Seizure: A Case Report. Cureus 2022; 14:e27806. [PMID: 36106241 PMCID: PMC9452063 DOI: 10.7759/cureus.27806] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 08/09/2022] [Indexed: 11/27/2022] Open
Abstract
Catecholaminergic polymorphic ventricular tachycardia (CPVT) is an inherited, highly malignant cardiac channelopathy that causes autopsy-negative sudden deaths and sudden infant deaths. The symptoms of CPVT range from asymptomatic to syncopal. We present a patient who has had sporadic seizures for the last four years and was diagnosed with focal seizures. Genetic testing revealed heterozygosity for a variant of uncertain significance in the cardiac ryanodine receptor (RYR2). Pathogenic variants are known to be associated with CPVT. A subcutaneous implantable cardioverter-defibrillator (ICD) was placed and is being closely followed in the cardiology clinic.
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18
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Hu J, Gao X, Chen L, Zhou T, Du Z, Jiang J, Wei L, Zhang Z. A novel mutation in ryanodine receptor 2 ( RYR2) genes at c.12670G>T associated with focal epilepsy in a 3-year-old child. Front Pediatr 2022; 10:1022268. [PMID: 36340715 PMCID: PMC9627620 DOI: 10.3389/fped.2022.1022268] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/18/2022] [Accepted: 09/27/2022] [Indexed: 11/13/2022] Open
Abstract
BACKGROUND Ryanodine receptor 2 (RYR2) encodes a component of a calcium channel. RYR2 variants were well-reported to be associated with catecholaminergic polymorphic ventricular tachycardia (CPVT), but rarely reported in epilepsy cases. Here, we present a novel heterozygous mutation of RYR2 in a child with focal epilepsy. METHODS At the age of 2 years and 7 months, the patient experienced seizures, such as eye closure, tooth clenching, clonic jerking and hemifacial spasm, as well as abnormal electroencephalogram (EEG). Then, he was analyzed by whole-exome sequencing (WES). The mutations of both the proband and his parents were further confirmed by Sanger sequencing. The pathogenicity of the variant was further assessed by population-based variant frequency screening, evolutionary conservation comparison, and American Association for Medical Genetics and Genomics (ACMG) scoring. RESULTS WES sequencing revealed a novel heterozygous truncating mutation [c.12670G > T, p.(Glu4224*), NM_001035.3] in RYR2 gene of the proband. Sanger sequencing confirmed that this mutation was inherited from his mother. This novel variant was predicted to be damaging by different bioinformatics methods. Cardiac investigation showed that the proband had no structural abnormalities, but sinus tachycardia. CONCLUSION We proposed that RYR2 is a potential candidate gene for focal epilepsy, and epilepsy patients carried with RYR2 variants should be given more attention, even if they do not show cardiac abnormalities.
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Affiliation(s)
- Junji Hu
- Department of Neurology, Zibo Changguo Hospital, Zibo, China
| | - Xueping Gao
- Yinfeng Gene Technology Co., Ltd., Jinan, China
| | - Longchang Chen
- Department of Neurology, Zibo Changguo Hospital, Zibo, China
| | - Tianshu Zhou
- The First Clinical College, Hubei University of Medicine, Shiyan, China
| | - Zhaoli Du
- Yinfeng Gene Technology Co., Ltd., Jinan, China
| | | | - Lei Wei
- Department of Center for Reproductive Medicine, TaiHe Hospital, Hubei University of Medicine, Shiyan, China
| | - Zhijun Zhang
- Department of Center for Reproductive Medicine, TaiHe Hospital, Hubei University of Medicine, Shiyan, China
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