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https://www.readbyqxmd.com/read/29141310/-analysis-of-gene-mutation-of-early-onset-epileptic-spasm-with-unknown-reason
#1
X Yang, G Pan, W H Li, L M Zhang, B B Wu, H J Wang, P Zhang, S Z Zhou
Objective: To summarize the gene mutation of early onset epileptic spasm with unknown reason. Method: In this prospective study, data of patients with early onset epileptic spasm with unknown reason were collected from neurological department of Children's Hospital of Fudan University between March 2016 and December 2016. Patients with known disorders such as infection, metabolic, structural, immunological problems and known genetic mutations were excluded. Patients with genetic disease that can be diagnosed by clinical manifestations and phenotypic characteristics were also excluded...
November 2, 2017: Zhonghua Er Ke za Zhi. Chinese Journal of Pediatrics
https://www.readbyqxmd.com/read/28985717/identification-of-vps35-p-d620n-mutation-related-parkinson-s-disease-in-a-taiwanese-family-with-successful-bilateral-subthalamic-nucleus-deep-brain-stimulation-a-case-report-and-literature-review
#2
Ying-Fa Chen, Yung-Yee Chang, Min-Yu Lan, Pei-Lung Chen, Chin-Hsien Lin
BACKGROUND: Vacuolar protein sorting 35 (VPS35) was recently reported to be a genetic cause for late-onset autosomal dominant Parkinson's disease (PD). However, VPS35 mutations are rarely reported in Asian populations. Herein, we report the first Taiwanese family with the pathogenic VPS35 p.D620N mutation, including one patient treated successfully with subthalamic nucleus deep brain stimulation (STN-DBS). CASE PRESENTATION: A 61-year-old woman presented with progressive left hand resting tremor at the age of 42...
October 6, 2017: BMC Neurology
https://www.readbyqxmd.com/read/28959013/dissecting-genetic-architecture-of-startle-response-in-drosophila-melanogaster-using-multi-omics-information
#3
Angli Xue, Hongcheng Wang, Jun Zhu
Startle behavior is important for survival, and abnormal startle responses are related to several neurological diseases. Drosophila melanogaster provides a powerful system to investigate the genetic underpinnings of variation in startle behavior. Since mechanically induced, startle responses and environmental conditions can be readily quantified and precisely controlled. The 156 wild-derived fully sequenced lines of the Drosophila Genetic Reference Panel (DGRP) were used to identify SNPs and transcripts associated with variation in startle behavior...
September 28, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28947717/clinical-utility-of-a-377-gene-custom-next-generation-sequencing-epilepsy-panel
#4
Jen Bevilacqua, Andrew Hesse, Brian Cormier, Jennifer Davey, Devanshi Patel, Kritika Shankar, Honey V Reddi
Epilepsy is one of the most common neurological disorders with about 500 genes thought to be involved across the phenotypic spectrum (Busch et al. 2014; Ran et al. 2014), which includes monogenic, multigenic, epistatic and pleiotropic phenotype manifestations (Busch et al. 2014; Thomas et al. 2014), driving the need for a comprehensive diagnostic test. Next-generation sequencing (NGS) allows for the simultaneous investigation of a large number of genes, making it a very attractive option for a condition as diverse as epilepsy at a low cost compared to traditional Sanger sequencing (Lemke et al...
September 2017: Journal of Genetics
https://www.readbyqxmd.com/read/28937538/severe-neonatal-cholestasis-in-cerebrotendinous-xanthomatosis-genetics-immunostaining-mass-spectrometry
#5
Jing-Yu Gong, Kenneth D R Setchell, Jing Zhao, Wujuan Zhang, Brian Wolfe, Yi Lu, Karolin Lackner, A S Knisely, Neng-Li Wang, Chen-Zhi Hao, Mei-Hong Zhang, Jian-She Wang
OBJECTIVES: Cerebrotendinous xanthomatosis (CTX) is caused by defects in sterol 27-hydroxylase (CYP27A1, encoded by CYP27A1), a key enzyme in the bile acid synthesis pathway. CTX usually presents as neurologic disease in adults or older children. The rare reports of CTX manifest as neonatal cholestasis assess the cholestasis as transient, with patient survival. Our experience differs. METHODS: Homozygous or compound heterozygous CYP27A1 mutations were detected in 8 neonatal cholestasis patients by whole exome sequencing, panel sequencing, or Sanger sequencing...
November 2017: Journal of Pediatric Gastroenterology and Nutrition
https://www.readbyqxmd.com/read/28931682/susceptibility-of-human-endogenous-retrovirus-type-k-to-reverse-transcriptase-inhibitors
#6
Rafael Contreras-Galindo, Derek Dube, Koh Fujinaga, Mark H Kaplan, David M Markovitz
Human endogenous retroviruses (HERVs) make up 8% of the human genome. The HERV type K (HERV-K) HML-2 (HK2) family contains proviruses that are the most recent entrants into the human germ line and are transcriptionally active. In HIV-1 infection and cancer, HK2 genes produce retroviral particles that appear to be infectious, yet the replication capacity of these viruses and potential pathogenicity has been difficult to ascertain. In this report, we screened the efficacy of commercially available reverse transcriptase inhibitors (RTIs) at inhibiting the enzymatic activity of HK2 RT and HK2 genomic replication...
December 1, 2017: Journal of Virology
https://www.readbyqxmd.com/read/28923025/intrafamilial-phenotypic-heterogeneity-in-a-taiwanese-family-with-a-mapt-p-r5h-mutation-a-case-report-and-literature-review
#7
Hui-Chi Lin, Chin-Hsien Lin, Pei-Lung Chen, Shih-Jung Cheng, Pei-Hao Chen
BACKGROUND: Frontotemporal degeneration (FTD) is a clinically and genetically heterogeneous neurodegenerative disorder characterized by deficits in executive function that frequently overlaps with parkinsonism and motor neuron disorders. Several genes have been identified to cause autosomal dominant forms of FTD, including the gene coding for the protein associated with microtubule tau (MAPT). While most reported pathogenic mutations in MAPT occur in exons 9-13, few families have been reported with mutations outside of this region...
September 18, 2017: BMC Neurology
https://www.readbyqxmd.com/read/28900389/cerebellar-atrophy-and-changes-in-cytokines-associated-with-the-cacna1a-r583q-mutation-in-a-russian-familial-hemiplegic-migraine-type-1-family
#8
Svetlana F Khaiboullina, Elena G Mendelevich, Leyla H Shigapova, Elena Shagimardanova, Guzel Gazizova, Alexey Nikitin, Ekaterina Martynova, Yuriy N Davidyuk, Enver I Bogdanov, Oleg Gusev, Arn M J M van den Maagdenberg, Rashid A Giniatullin, Albert A Rizvanov
Background: Immune mechanisms recently emerged as important contributors to migraine pathology with cytokines affecting neuronal excitation. Therefore, elucidating the profile of cytokines activated in various forms of migraine, including those with a known genetic cause, can help in diagnostic and therapeutic approaches. Methods: Here we (i) performed exome sequencing to identify the causal gene mutation and (ii) measured, using Bio-Plex technology, 22 cytokines in serum of patients with familial migraine (two with hemiplegic migraine and two with migraine with aura) from a Russian family that ethnically belongs to the Tatar population...
2017: Frontiers in Cellular Neuroscience
https://www.readbyqxmd.com/read/28837158/high-frequency-of-mosaic-pathogenic-variants-in-genes-causing-epilepsy-related-neurodevelopmental-disorders
#9
Mary Beth Stosser, Amanda S Lindy, Elizabeth Butler, Kyle Retterer, Caitlin M Piccirillo-Stosser, Gabriele Richard, Dianalee A McKnight
PurposeMosaicism probably represents an underreported cause of genetic disorders due to detection challenges during routine molecular diagnostics. The purpose of this study was to evaluate the frequency of mosaicism detected by next-generation sequencing in genes associated with epilepsy-related neurodevelopmental disorders.MethodsWe conducted a retrospective analysis of 893 probands with epilepsy who had a multigene epilepsy panel or whole-exome sequencing performed in a clinical diagnostic laboratory and were positive for a pathogenic or likely pathogenic variant in one of nine genes (CDKL5, GABRA1, GABRG2, GRIN2B, KCNQ2, MECP2, PCDH19, SCN1A, or SCN2A)...
August 24, 2017: Genetics in Medicine: Official Journal of the American College of Medical Genetics
https://www.readbyqxmd.com/read/28832565/massive-sequencing-of-70-genes-reveals-a-myriad-of-missing-genes-or-mechanisms-to-be-uncovered-in-hereditary-spastic-paraplegias
#10
Sara Morais, Laure Raymond, Mathilde Mairey, Paula Coutinho, Eva Brandão, Paula Ribeiro, José Leal Loureiro, Jorge Sequeiros, Alexis Brice, Isabel Alonso, Giovanni Stevanin
Hereditary spastic paraplegias (HSP) are neurodegenerative disorders characterized by lower limb spasticity and weakness that can be complicated by other neurological or non-neurological signs. Despite a high genetic heterogeneity (>60 causative genes), 40-70% of the families remain without a molecular diagnosis. Analysis of one of the pioneer cohorts of 193 HSP families generated in the early 1990s in Portugal highlighted that SPAST and SPG11 are the most frequent diagnoses. We have now explored 98 unsolved families from this series using custom next generation sequencing panels analyzing up to 70 candidate HSP genes...
November 2017: European Journal of Human Genetics: EJHG
https://www.readbyqxmd.com/read/28814522/characterization-of-cis-acting-rna-elements-of-zika-virus-by-using-a-self-splicing-ribozyme-dependent-infectious-clone
#11
Zhong-Yu Liu, Jiu-Yang Yu, Xing-Yao Huang, Hang Fan, Xiao-Feng Li, Yong-Qiang Deng, Xue Ji, Meng-Li Cheng, Qing Ye, Hui Zhao, Jian-Feng Han, Xiao-Ping An, Tao Jiang, Bo Zhang, Yi-Gang Tong, Cheng-Feng Qin
Zika virus (ZIKV) has caused significant outbreaks and epidemics in the Americas recently, raising global concern due to its ability to cause microcephaly and other neurological complications. A stable and efficient infectious clone of ZIKV is urgently needed. However, the instability and toxicity of flavivirus cDNA clones in Escherichia coli hosts has hindered the development of ZIKV infectious clones. Here, using a novel self-splicing ribozyme-based strategy, we generated a stable infectious cDNA clone of a contemporary ZIKV strain imported from Venezuela to China in 2016...
November 1, 2017: Journal of Virology
https://www.readbyqxmd.com/read/28739201/neonatal-detection-of-aicardi-gouti%C3%A3-res-syndrome-by-increased-c26-0-lysophosphatidylcholine-and-interferon-signature-on-newborn-screening-blood-spots
#12
Thais Armangue, Joseph J Orsini, Asako Takanohashi, Francesco Gavazzi, Alex Conant, Nicole Ulrick, Mark A Morrissey, Norah Nahhas, Guy Helman, Heather Gordish-Dressman, Simona Orcesi, Davide Tonduti, Chloe Stutterd, Keith van Haren, Camilo Toro, Alejandro D Iglesias, Marjo S van der Knaap, Raphaela Goldbach Mansky, Anne B Moser, Richard O Jones, Adeline Vanderver
BACKGROUND: Aicardi Goutières Syndrome (AGS) is a heritable interferonopathy associated with systemic autoinflammation causing interferon (IFN) elevation, central nervous system calcifications, leukodystrophy and severe neurologic sequelae. An infant with TREX1 mutations was recently found to have abnormal C26:0 lysophosphatidylcholine (C26:0 Lyso-PC) in a newborn screening platform for X-linked adrenoleukodystrophy, prompting analysis of this analyte in retrospectively collected samples from individuals affected by AGS...
July 20, 2017: Molecular Genetics and Metabolism
https://www.readbyqxmd.com/read/28726809/genomic-diagnostics-within-a-medically-underserved-population-efficacy-and-implications
#13
Kevin A Strauss, Claudia Gonzaga-Jauregui, Karlla W Brigatti, Katie B Williams, Alejandra K King, Cristopher Van Hout, Donna L Robinson, Millie Young, Kavita Praveen, Adam D Heaps, Mindy Kuebler, Aris Baras, Jeffrey G Reid, John D Overton, Frederick E Dewey, Robert N Jinks, Ian Finnegan, Scott J Mellis, Alan R Shuldiner, Erik G Puffenberger
PurposeWe integrated whole-exome sequencing (WES) and chromosomal microarray analysis (CMA) into a clinical workflow to serve an endogamous, uninsured, agrarian community.MethodsSeventy-nine probands (newborn to 49.8 years) who presented between 1998 and 2015 remained undiagnosed after biochemical and molecular investigations. We generated WES data for probands and family members and vetted variants through rephenotyping, segregation analyses, and population studies.ResultsThe most common presentation was neurological disease (64%)...
July 20, 2017: Genetics in Medicine: Official Journal of the American College of Medical Genetics
https://www.readbyqxmd.com/read/28550016/genomic-analysis-of-genotype-by-social-environment-interaction-for-drosophila-melanogaster-aggressive-behavior
#14
Palle Duun Rohde, Bryn Gaertner, Kirsty Ward, Peter Sørensen, Trudy F C Mackay
Human psychiatric disorders such as schizophrenia, bipolar disorder, and attention-deficit/hyperactivity disorder often include adverse behaviors including increased aggressiveness. Individuals with psychiatric disorders often exhibit social withdrawal, which can further increase the probability of conducting a violent act. Here, we used the inbred, sequenced lines of the Drosophila Genetic Reference Panel (DGRP) to investigate the genetic basis of variation in male aggressive behavior for flies reared in a socialized and socially isolated environment...
August 2017: Genetics
https://www.readbyqxmd.com/read/28542306/gene-signature-associated-with-benign-neurofibroma-transformation-to-malignant-peripheral-nerve-sheath-tumors
#15
Marta Martínez, Carlos O S Sorzano, Alberto Pascual-Montano, Jose M Carazo
Benign neurofibromas, the main phenotypic manifestations of the rare neurological disorder neurofibromatosis type 1, degenerate to malignant tumors associated to poor prognosis in about 10% of patients. Despite efforts in the field of (epi)genomics, the lack of prognostic biomarkers with which to predict disease evolution frustrates the adoption of appropriate early therapeutic measures. To identify potential biomarkers of malignant neurofibroma transformation, we integrated four human experimental studies and one for mouse, using a gene score-based meta-analysis method, from which we obtained a score-ranked signature of 579 genes...
2017: PloS One
https://www.readbyqxmd.com/read/28524223/-infantile-epileptic-encephalopathies-what-matters-is-genetics
#16
J J Garcia-Penas, M Jimenez-Legido
INTRODUCTION: Epileptic encephalopathies in infancy are defined as conditions where the sustained epileptic activity itself may contribute to the severe neurological and cognitive impairment. These epileptic encephalopathies include Ohtahara syndrome, early myoclonic epileptic encephalopathy, West syndrome, Dravet syndrome, and malignant migrating epilepsy in infancy. These syndromes result from identifiable primary causes, such as structural, neurodegenerative, metabolic, or genetic defects...
May 17, 2017: Revista de Neurologia
https://www.readbyqxmd.com/read/28424375/mitochondria-a-central-target-for-sex-differences-in-pathologies
#17
REVIEW
Renée Ventura-Clapier, Maryline Moulin, Jérôme Piquereau, Christophe Lemaire, Mathias Mericskay, Vladimir Veksler, Anne Garnier
It is increasingly acknowledged that a sex and gender specificity affects the occurrence, development, and consequence of a plethora of pathologies. Mitochondria are considered as the powerhouse of the cell because they produce the majority of energy-rich phosphate bonds in the form of adenosine tri-phosphate (ATP) but they also participate in many other functions like steroid hormone synthesis, reactive oxygen species (ROS) production, ionic regulation, and cell death. Adequate cellular energy supply and survival depend on mitochondrial life cycle, a process involving mitochondrial biogenesis, dynamics, and quality control via mitophagy...
May 1, 2017: Clinical Science (1979-)
https://www.readbyqxmd.com/read/28255305/xeroderma-pigmentosum-with-severe-neurological-manifestations-de-sanctis-cacchione-syndrome-and-a-novel-xpc-mutation
#18
Esteban Uribe-Bojanini, Sara Hernandez-Quiceno, Alicia María Cock-Rada
Several genetic disorders caused by defective nucleotide excision repair that affect the skin and the nervous system have been described, including Xeroderma Pigmentosum (XP), De Sanctis-Cacchione syndrome (DSC), Cockayne syndrome, and Trichothiodystrophy. Cutaneous photosensitivity with an increased risk of skin malignancy is a common feature of these disorders, but clinical manifestations commonly overlap these syndromes. Several genes have been found to be altered in these pathologies, but we lack more genotype-phenotype correlations in order to make an accurate diagnosis...
2017: Case Reports in Medicine
https://www.readbyqxmd.com/read/28251916/genetic-heterogeneity-of-motor-neuropathies
#19
Boglarka Bansagi, Helen Griffin, Roger G Whittaker, Thalia Antoniadi, Teresinha Evangelista, James Miller, Mark Greenslade, Natalie Forester, Jennifer Duff, Anna Bradshaw, Stephanie Kleinle, Veronika Boczonadi, Hannah Steele, Venkateswaran Ramesh, Edit Franko, Angela Pyle, Hanns Lochmüller, Patrick F Chinnery, Rita Horvath
OBJECTIVE: To study the prevalence, molecular cause, and clinical presentation of hereditary motor neuropathies in a large cohort of patients from the North of England. METHODS: Detailed neurologic and electrophysiologic assessments and next-generation panel testing or whole exome sequencing were performed in 105 patients with clinical symptoms of distal hereditary motor neuropathy (dHMN, 64 patients), axonal motor neuropathy (motor Charcot-Marie-Tooth disease [CMT2], 16 patients), or complex neurologic disease predominantly affecting the motor nerves (hereditary motor neuropathy plus, 25 patients)...
March 28, 2017: Neurology
https://www.readbyqxmd.com/read/28185542/analysis-of-amplicon-based-ngs-data-from-neurological-disease-gene-panels-a-new-method-for-allele-drop-out-management
#20
Susanna Zucca, Margherita Villaraggia, Stella Gagliardi, Gaetano Salvatore Grieco, Marialuisa Valente, Cristina Cereda, Paolo Magni
BACKGROUND: Amplicon-based targeted resequencing is a commonly adopted solution for next-generation sequencing applications focused on specific genomic regions. The reliability of such approaches rests on the high specificity and deep coverage, although sequencing artifacts attributable to PCR-like amplification can be encountered. Between these artifacts, allele drop-out, which is the preferential amplification of one allele, causes an artificial increase in homozygosity when heterozygous mutations fall on a primer pairing region...
November 8, 2016: BMC Bioinformatics
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