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https://www.readbyqxmd.com/read/28550016/genomic-analysis-of-genotype-by-social-environment-interaction-for-drosophila-aggressive-behavior
#1
Palle Duun Rohde, Bryn Gaertner, Kirsty Wards, Peter Sørensen, Trudy F C Mackay
Human psychiatric disorders such as schizophrenia, bipolar disorder and attention-deficit/hyper-activity 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...
May 26, 2017: Genetics
https://www.readbyqxmd.com/read/28542306/gene-signature-associated-with-benign-neurofibroma-transformation-to-malignant-peripheral-nerve-sheath-tumors
#2
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
#3
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
#4
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
#5
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
#6
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
#7
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
https://www.readbyqxmd.com/read/28160876/neurology-individualized-medicine-when-to-use-next-generation-sequencing-panels
#8
REVIEW
Christopher J Klein, Tatiana M Foroud
Next-generation sequencing (NGS) is increasingly being applied to clinical testing. This practice is predicted to grow especially in neurology clinics because many of their patients have monogenetic causes for their "diagnostic odyssey." The cost of sequencing has been steadily decreasing, but the cost of DNA sequencing is a minor part of the total cost. Downstream data analysis, storage, and interpretation account for most of the total expense. In patients with nonspecific neurologic disorders in which an extensive number of genetic differential diagnoses exist, whole-genome sequencing (WGS) or whole-exome sequencing (WES) has shown promise in the identification of genetic causes...
February 2017: Mayo Clinic Proceedings
https://www.readbyqxmd.com/read/27943079/assessment-of-type-i-interferon-signaling-in-pediatric-inflammatory-disease
#9
Gillian I Rice, Isabelle Melki, Marie-Louise Frémond, Tracy A Briggs, Mathieu P Rodero, Naoki Kitabayashi, Anthony Oojageer, Brigitte Bader-Meunier, Alexandre Belot, Christine Bodemer, Pierre Quartier, Yanick J Crow
PURPOSE: Increased type I interferon is considered relevant to the pathology of a number of monogenic and complex disorders spanning pediatric rheumatology, neurology, and dermatology. However, no test exists in routine clinical practice to identify enhanced interferon signaling, thus limiting the ability to diagnose and monitor treatment of these diseases. Here, we set out to investigate the use of an assay measuring the expression of a panel of interferon-stimulated genes (ISGs) in children affected by a range of inflammatory diseases...
February 2017: Journal of Clinical Immunology
https://www.readbyqxmd.com/read/27821230/-primary-central-nervous-system-diffuse-large-b-cell-lymphoma-a-clinicopathologic-and-molecular-study
#10
Z P Ma, Babayi Ainiwaer, Z Y Liu, X L Shi, W L Cui, W Zhang, X X Li
Objective: To investigate clinicopathologic characteristics, immunophenotype and EB virus-related molecular genetic alterations in primary central nervous system diffuse large B cell lymphoma (DLBCL) along with correlation with clinical prognosis. Methods: A total of 30 cases of primary central nervous system DLBCL were retrospectively studied by retrieving clinical data, histological evaluation and immunophenotyping by EnVision two steps methods. The expression of EBER mRNA was detected by in situ hybridization and bcl-2, bcl-6 and C-MYC gene abnormalities were analyzed by interphase fluorescence in situ hybridization...
November 8, 2016: Zhonghua Bing Li Xue za Zhi Chinese Journal of Pathology
https://www.readbyqxmd.com/read/27671536/a-first-line-diagnostic-assay-for-limb-girdle-muscular-dystrophy-and-other-myopathies
#11
Dorota Monies, Hindi N Alhindi, Mohamed A Almuhaizea, Mohamed Abouelhoda, Anas M Alazami, Ewa Goljan, Banan Alyounes, Dyala Jaroudi, Abdulelah AlIssa, Khalid Alabdulrahman, Shazia Subhani, Mohamed El-Kalioby, Tariq Faquih, Salma M Wakil, Nada A Altassan, Brian F Meyer, Saeed Bohlega
BACKGROUND: Fifty random genetically unstudied families (limb-girdle muscular dystrophy (LGMD)/myopathy) were screened with a gene panel incorporating 759 OMIM genes associated with neurological disorders. Average coverage of the CDS and 10 bp flanking regions of genes was 99 %. All families were referred to the Neurosciences Clinic of King Faisal Specialist Hospital and Research Centre, Saudi Arabia. Patients presented with muscle weakness affecting the pelvic and shoulder girdle. Muscle biopsy in all cases showed dystrophic or myopathic changes...
September 27, 2016: Human Genomics
https://www.readbyqxmd.com/read/27664052/molecular-and-functional-characterization-of-a-cohort-of-spanish-patients-with-ataxia-telangiectasia
#12
Diana Carranza, Ana Karina Vega, Sara Torres-Rusillo, Enrique Montero, Luis Javier Martinez, Manuel Santamaría, Juan Luis Santos, Ignacio J Molina
Ataxia-telangiectasia is a multisystemic disease with severe neurological affectation, immunodeficiency and telangiectasia. The disorder is caused by alterations in the ATM gene, whose size and complexity make molecular diagnosis difficult. We designed a target-enrichment next-generation sequencing strategy to characterize 28 patients from several regions of Spain. This approach allowed us to identify gene variants affecting function in 54 out of the 56 alleles analyzed, although the two unresolved alleles belong to brothers...
September 23, 2016: Neuromolecular Medicine
https://www.readbyqxmd.com/read/27604308/advantages-and-pitfalls-of-an-extended-gene-panel-for-investigating-complex-neurometabolic-phenotypes
#13
Emma S Reid, Apostolos Papandreou, Suzanne Drury, Christopher Boustred, Wyatt W Yue, Yehani Wedatilake, Clare Beesley, Thomas S Jacques, Glenn Anderson, Lara Abulhoul, Alex Broomfield, Maureen Cleary, Stephanie Grunewald, Sophia M Varadkar, Nick Lench, Shamima Rahman, Paul Gissen, Peter T Clayton, Philippa B Mills
Neurometabolic disorders are markedly heterogeneous, both clinically and genetically, and are characterized by variable neurological dysfunction accompanied by suggestive neuroimaging or biochemical abnormalities. Despite early specialist input, delays in diagnosis and appropriate treatment initiation are common. Next-generation sequencing approaches still have limitations but are already enabling earlier and more efficient diagnoses in these patients. We designed a gene panel targeting 614 genes causing inborn errors of metabolism and tested its diagnostic efficacy in a paediatric cohort of 30 undiagnosed patients presenting with variable neurometabolic phenotypes...
September 6, 2016: Brain: a Journal of Neurology
https://www.readbyqxmd.com/read/27549087/improving-diagnosis-of-inherited-peripheral-neuropathies-through-gene-panel-analysis
#14
Petra Laššuthová, Dana Šafka Brožková, Marcela Krůtová, Jana Neupauerová, Jana Haberlová, Radim Mazanec, Pavel Dřímal, Pavel Seeman
BACKGROUND: Inherited peripheral neuropathies (IPN) are the most common inherited neurological condition. It represents a highly heterogeneous group, both clinically and genetically. Targeted disease specific gene panel massively parallel sequencing (MPS) seems to be a useful tool in diagnosis of disorders with high genetic heterogeneity. METHODS: In our study, we have designed, validated and updated our own custom gene panel of all known genes associated with IPN...
August 22, 2016: Orphanet Journal of Rare Diseases
https://www.readbyqxmd.com/read/27416040/molecular-signaling-and-dysfunction-of-the-human-reactive-enteric-glial-cell-phenotype-implications-for-gi-infection-ibd-poi-neurological-motility-and-gi-disorders
#15
Andromeda Liñán-Rico, Fabio Turco, Fernando Ochoa-Cortes, Alan Harzman, Bradley J Needleman, Razvan Arsenescu, Mahmoud Abdel-Rasoul, Paolo Fadda, Iveta Grants, Emmett Whitaker, Rosario Cuomo, Fievos L Christofi
BACKGROUND: Clinical observations or animal studies implicate enteric glial cells in motility disorders, irritable bowel syndrome, inflammatory bowel disease, gastrointestinal (GI) infections, postoperative ileus, and slow transit constipation. Mechanisms underlying glial responses to inflammation in human GI tract are not understood. Our goal was to identify the "reactive human enteric glial cell (rhEGC) phenotype" induced by inflammation, and probe its functional relevance. METHODS: Human enteric glial cells in culture from 15 GI-surgical specimens were used to study gene expression, Ca, and purinergic signaling by Ca/fluo-4 imaging and mechanosensitivity...
August 2016: Inflammatory Bowel Diseases
https://www.readbyqxmd.com/read/27268037/clinical-heterogeneity-of-pla2g6-related-parkinsonism-analysis-of-two-saudi-families
#16
Saeed A Bohlega, Bashayer R Al-Mubarak, Eman A Alyemni, Mohamed Abouelhoda, Dorota Monies, Abeer E Mustafa, Dania S Khalil, Sara Al Haibi, Hussam Abou Al-Shaar, Tariq Faquih, Mohamed El-Kalioby, Asma I Tahir, Nada A Al Tassan
BACKGROUND: Recessive mutations in PLA2G6 have been associated with different neurodegenerative disorders, including infantile neuroaxonal dystrophy, neurodegeneration with brain iron accumulation and more recently, early-onset dystonia parkinsonism. METHOD: Targeted-next generation sequencing using a custom Neurology panel, containing 758 OMIM-listed genes implicated in neurological disorders, was carried out in two index cases from two different Saudi families displaying early-onset levodopa-responsive Parkinsonism with pyramidal signs and additional clinical features...
June 7, 2016: BMC Research Notes
https://www.readbyqxmd.com/read/27252897/ada2-deficiency-case-report-of-a-new-phenotype-and-novel-mutation-in-two-sisters
#17
F Uettwiller, G Sarrabay, M P Rodero, G I Rice, E Lagrue, Y Marot, K Deiva, I Touitou, Y J Crow, P Quartier
The objective of this paper is to: describe the phenotype compound heterozygote for mutations in CECR1 in two children. We describe the clinical and immunological phenotype, including the assessment of ADA2 activity, cytokine expression, interferon-stimulated and neutrophil-stimulated gene signatures, and the results of CECR1 sequencing. The first patient presented with intermittent fever, cutaneous vasculitis, myalgia and muscle inflammation on MRI leading to a provisional diagnosis of periarteritis nodosa...
2016: RMD Open
https://www.readbyqxmd.com/read/27106595/an-atypical-12q24-31-microdeletion-implicates-six-genes-including-a-histone-demethylase-kdm2b-and-a-histone-methyltransferase-setd1b-in-syndromic-intellectual-disability
#18
Jonathan D J Labonne, Kang-Han Lee, Shigeki Iwase, Il-Keun Kong, Michael P Diamond, Lawrence C Layman, Cheol-Hee Kim, Hyung-Goo Kim
Microdeletion syndromes are frequent causes of neuropsychiatric disorders leading to intellectual disability as well as autistic features accompanied by epilepsy and craniofacial anomalies. From comparative deletion mapping of the smallest microdeletion to date at 12q24.31, found in a patient with overlapping clinical features of 12q24.31 microdeletion syndrome, we narrowed the putative critical region to 445 kb containing seven genes, one microRNA, and one non-coding RNA. Zebrafish in situ hybridization and comprehensive transcript analysis of annotated genes in the panels of human organ and brain suggest that these are all candidates for neurological phenotypes excluding the gene HPD...
July 2016: Human Genetics
https://www.readbyqxmd.com/read/27095681/genetic-analysis-of-chchd10-in-french-familial-amyotrophic-lateral-sclerosis-patients
#19
Elisa Teyssou, Laura Chartier, Mélanie Albert, Alexandra Bouscary, Jean-Christophe Antoine, Jean-Philippe Camdessanché, Francesco Rotolo, Philippe Couratier, François Salachas, Danielle Seilhean, Stéphanie Millecamps
Mutations in CHCHD10 have been reported as the cause of a large panel of neurologic disorders. To confirm the contribution of this gene to amyotrophic lateral sclerosis (ALS) disease, we analyzed the 4 coding exons of CHCHD10 by Sanger sequencing in a cohort of 118 French familial ALS already excluded for all known ALS-related genes. We did not find any pathogenic mutation suggesting that CHCHD10 is not a major genetic cause of familial ALS, in France.
June 2016: Neurobiology of Aging
https://www.readbyqxmd.com/read/27086870/syne1-ataxia-is-a-common-recessive-ataxia-with-major-non-cerebellar-features-a-large-multi-centre-study
#20
MULTICENTER STUDY
Matthis Synofzik, Katrien Smets, Martial Mallaret, Daniela Di Bella, Constanze Gallenmüller, Jonathan Baets, Martin Schulze, Stefania Magri, Elisa Sarto, Mona Mustafa, Tine Deconinck, Tobias Haack, Stephan Züchner, Michael Gonzalez, Dagmar Timmann, Claudia Stendel, Thomas Klopstock, Alexandra Durr, Christine Tranchant, Marc Sturm, Wahiba Hamza, Lorenzo Nanetti, Caterina Mariotti, Michel Koenig, Ludger Schöls, Rebecca Schüle, Peter de Jonghe, Mathieu Anheim, Franco Taroni, Peter Bauer
Mutations in the synaptic nuclear envelope protein 1 (SYNE1) gene have been reported to cause a relatively pure, slowly progressive cerebellar recessive ataxia mostly identified in Quebec, Canada. Combining next-generation sequencing techniques and deep-phenotyping (clinics, magnetic resonance imaging, positron emission tomography, muscle histology), we here established the frequency, phenotypic spectrum and genetic spectrum of SYNE1 in a screening of 434 non-Canadian index patients from seven centres across Europe...
May 2016: Brain: a Journal of Neurology
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