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Naudhani S, Ahmad A, Khan Bazai F, Pervez MT, Zafar A, Shah SA, Raheem N, Baloch AH, Mushtaq M, Daud S. A Missense Pathogenic Variant in a Conserved Region of CNTNAP2 Is Associated with Obesity, Seizures, and Language Impairment in a Pakistani Family. Mol Syndromol 2023; 14:293-302. [PMID: 37766826 PMCID: PMC10521233 DOI: 10.1159/000529427] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/18/2022] [Accepted: 01/24/2023] [Indexed: 09/29/2023] Open
Abstract
Introduction In a consanguineous family, seven siblings born in three sibships showed a syndromic disorder characterized by obesity, seizures, and language impairment phenotypes, which appeared at early age or developed during early childhood. Methods By whole-exome sequencing and subsequent Sanger sequencing, a novel homozygous missense variant (c.3371 T>A [p.Ile1124Asn]) in exon 20 of the CNTNAP2 gene was identified. Results The pathogenic variant in this family is located within one of the laminin G-like 4 domains of CASPR2 and may cause loss of hydrophobic interactions of CASPR2 with its partner proteins. Single nucleotide and copy number variants in this gene have previously been related to Gilles de la Tourette syndrome, cortical dysplasia-focal epilepsy syndrome, schizophrenia, Pitt-Hopkins syndrome, and autism spectrum, attention deficit hyperactivity, and obsessive compulsive disorders. Yet, few studies described patients with CNTNAP2 variants showing diet-induced obesity. Conclusion This report expands the phenotypic spectrum of this rare syndrome and provides deeper insights by documenting the clinical features and genetic findings of the patients.
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Affiliation(s)
- Sara Naudhani
- Department of Biotechnology, BUITEMS, Quetta, Pakistan
| | - Adeel Ahmad
- Continental Medical College and Hayat Memorial Hospital, Lahore, Pakistan
| | - Fariya Khan Bazai
- Quetta Institute of Medical Sciences/Combined Military Hospital, Quetta, Pakistan
| | - Muhammad Tariq Pervez
- Department of Bioinformatics and Computational Biology, Virtual University of Pakistan, Lahore, Pakistan
| | - Azqa Zafar
- Lahore General Hospital, Lahore, Pakistan
| | - Sajjad Ali Shah
- Institute of Biotechnology and Microbiology, Bacha Khan University, Charsadda, Pakistan
| | | | - Abdul Hameed Baloch
- Department of Biotechnology, Lasbela University of Agriculture, Water and Marine Sciences (LUAWMS), Uthal, Pakistan
| | | | - Shakeela Daud
- Department of Biotechnology, BUITEMS, Quetta, Pakistan
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2
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Ranganath P, Dalal A. Does Every Child With Autism Need Investigations for Inborn Errors of Metabolism? Indian Pediatr 2023. [DOI: 10.1007/s13312-023-2828-1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/31/2023]
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3
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Pedersen JH, Skytthe A, Bybjerg-Grauholm J, Kucukyildiz AS, Skov L, Debes NM, Tümer Z. Concordance and comorbidities among monozygotic twins with tic disorders. J Psychiatr Res 2022; 146:297-303. [PMID: 34794811 DOI: 10.1016/j.jpsychires.2021.11.019] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/09/2021] [Revised: 10/08/2021] [Accepted: 11/06/2021] [Indexed: 11/17/2022]
Abstract
Gilles de la Tourette Syndrome (GTS) is a multifactorial neurodevelopmental disorder characterized by tics and multiple comorbidities. The pathophysiology is not yet fully understood, but both environmental and genetic risk factors seem to be involved. Twin studies provide important knowledge on genetic factors. We assessed the concordance of GTS and chronic tic disorders (CTD) in monozygotic (MZ) twins, and examined tic severity, symptoms of obsessive-compulsive disorder (OCD), attention deficit/hyperactivity disorder and autism spectrum disorder. Twin pairs, where at least one twin was diagnosed with any tic disorder, were identified through Danish Twin Registry, Psychiatric Central Registry, Danish National Patient Registry and National Tourette Clinic, Copenhagen University Hospital, Herlev. Zygosity was tested with single-nucleotide polymorphism (SNP) genotyping and clinical assessment was done with validated tools. 14 MZ twin pairs were included: five were discordant. Seven twin pairs were concordant for GTS, and for two pairs one twin had GTS and the other CTD. Among the twins with CTD or GTS, 50% had at least one comorbidity, which is higher than in background populations. The GTS + OCD-phenotype was significantly more frequent among GTS-concordant than among discordant twins. No statistically significant differences were found between the GTS-concordant and discordant twin pairs regarding tic severity or comorbidities. Thorough clinical assessment and SNP-based genotyping are important when conducting clinical twin studies. We found high concordance of GTS and CTD, which supports the notion that both disorders have common genetic risk factors. Further studies with larger cohorts including dizygotic twins are warranted for more conclusive results.
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Affiliation(s)
| | - Axel Skytthe
- The Danish Twin Registry, Epidemiology, Biostatistics, and Biodemography, Institute of Public Health, University of Southern, Denmark
| | | | - Asli Sena Kucukyildiz
- Kennedy Center, Department of Clinical Genetics, Copenhagen University Hospital, Rigshospitalet, Copenhagen, Denmark
| | - Liselotte Skov
- Department of Pediatrics, Copenhagen University Hospital, Herlev, Denmark
| | - Nanette Mol Debes
- Department of Pediatrics, Copenhagen University Hospital, Herlev, Denmark
| | - Zeynep Tümer
- Kennedy Center, Department of Clinical Genetics, Copenhagen University Hospital, Rigshospitalet, Copenhagen, Denmark; Department of Clinical Medicine, Faculty of Health and Medical Sciences, University of Copenhagen, Copenhagen, Denmark.
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4
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Clarke RA, Eapen V. LRRTM4 Terminal Exon Duplicated in Family with Tourette Syndrome, Autism and ADHD. Genes (Basel) 2021; 13:genes13010066. [PMID: 35052406 PMCID: PMC8774418 DOI: 10.3390/genes13010066] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/23/2021] [Revised: 11/25/2021] [Accepted: 12/06/2021] [Indexed: 11/16/2022] Open
Abstract
Tourette syndrome (TS) is a neurodevelopmental disorder characterised by motor and vocal tics and strong association with autistic deficits, obsessive–compulsive disorder (OCD) and attention-deficit/hyperactivity disorder (ADHD). The genetic overlap between TS and autism spectrum disorder (ASD) includes those genes that encode the neurexin trans-synaptic connexus (NTSC) inclusive of the presynaptic neurexins (NRXNs) and postsynaptic neuroligins (NLGNs), cerebellin precursors (CBLNs in complex with the glutamate ionotropic receptor deltas (GRIDs)) and the leucine-rich repeat transmembrane proteins (LRRTMs). In this study, we report the first evidence of a TS and ASD association with yet another NTSC gene family member, namely LRRTM4. Duplication of the terminal exon of LRRTM4 was found in two females with TS from the same family (mother and daughter) in association with autistic traits and ASD.
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5
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Rosenthal SB, Willsey HR, Xu Y, Mei Y, Dea J, Wang S, Curtis C, Sempou E, Khokha MK, Chi NC, Willsey AJ, Fisch KM, Ideker T. A convergent molecular network underlying autism and congenital heart disease. Cell Syst 2021; 12:1094-1107.e6. [PMID: 34411509 PMCID: PMC8602730 DOI: 10.1016/j.cels.2021.07.009] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/23/2020] [Revised: 05/10/2021] [Accepted: 07/28/2021] [Indexed: 12/29/2022]
Abstract
Patients with neurodevelopmental disorders, including autism, have an elevated incidence of congenital heart disease, but the extent to which these conditions share molecular mechanisms remains unknown. Here, we use network genetics to identify a convergent molecular network underlying autism and congenital heart disease. This network is impacted by damaging genetic variants from both disorders in multiple independent cohorts of patients, pinpointing 101 genes with shared genetic risk. Network analysis also implicates risk genes for each disorder separately, including 27 previously unidentified genes for autism and 46 for congenital heart disease. For 7 genes with shared risk, we create engineered disruptions in Xenopus tropicalis, confirming both heart and brain developmental abnormalities. The network includes a family of ion channels, such as the sodium transporter SCN2A, linking these functions to early heart and brain development. This study provides a road map for identifying risk genes and pathways involved in co-morbid conditions.
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Affiliation(s)
- Sara Brin Rosenthal
- Center for Computational Biology & Bioinformatics, Department of Medicine, University of California, San Diego, La Jolla, CA 92093, USA
| | - Helen Rankin Willsey
- Department of Psychiatry and Behavioral Sciences, Weill Institute for Neurosciences, University of California, San Francisco, San Francisco, CA 94158, USA
| | - Yuxiao Xu
- Department of Psychiatry and Behavioral Sciences, Weill Institute for Neurosciences, University of California, San Francisco, San Francisco, CA 94158, USA
| | - Yuan Mei
- Division of Genetics, Department of Medicine, University of California, San Diego, La Jolla, CA 92093, USA
| | - Jeanselle Dea
- Department of Psychiatry and Behavioral Sciences, Weill Institute for Neurosciences, University of California, San Francisco, San Francisco, CA 94158, USA
| | - Sheng Wang
- Quantitative Biosciences Institute (QBI), University of California, San Francisco, San Francisco, CA 94158, USA
| | - Charlotte Curtis
- Division of Genetics, Department of Medicine, University of California, San Diego, La Jolla, CA 92093, USA
| | - Emily Sempou
- Pediatric Genomics Discovery Program, Department of Pediatrics and Genetics, Yale University School of Medicine, New Haven, CT 06510, USA
| | - Mustafa K Khokha
- Pediatric Genomics Discovery Program, Department of Pediatrics and Genetics, Yale University School of Medicine, New Haven, CT 06510, USA
| | - Neil C Chi
- Division of Cardiology, Department of Medicine, University of California, San Diego, La Jolla, CA 92093, USA
| | - Arthur Jeremy Willsey
- Department of Psychiatry and Behavioral Sciences, Weill Institute for Neurosciences, University of California, San Francisco, San Francisco, CA 94158, USA; Quantitative Biosciences Institute (QBI), University of California, San Francisco, San Francisco, CA 94158, USA.
| | - Kathleen M Fisch
- Center for Computational Biology & Bioinformatics, Department of Medicine, University of California, San Diego, La Jolla, CA 92093, USA.
| | - Trey Ideker
- Division of Genetics, Department of Medicine, University of California, San Diego, La Jolla, CA 92093, USA.
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6
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Pang W, Yi X, Li L, Liu L, Xiang W, Xiao L. Untangle the Multi-Facet Functions of Auts2 as an Entry Point to Understand Neurodevelopmental Disorders. Front Psychiatry 2021; 12:580433. [PMID: 33967843 PMCID: PMC8102784 DOI: 10.3389/fpsyt.2021.580433] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/06/2020] [Accepted: 03/22/2021] [Indexed: 12/27/2022] Open
Abstract
Neurodevelopmental disorders are psychiatric diseases that are usually first diagnosed in infancy, childhood and adolescence. Autism spectrum disorder (ASD) is a neurodevelopmental disorder, characterized by core symptoms including impaired social communication, cognitive rigidity and repetitive behavior, accompanied by a wide range of comorbidities such as intellectual disability (ID) and dysmorphisms. While the cause remains largely unknown, genetic, epigenetic, and environmental factors are believed to contribute toward the onset of the disease. Autism Susceptibility Candidate 2 (Auts2) is a gene highly associated with ID and ASD. Therefore, understanding the function of Auts2 gene can provide a unique entry point to untangle the complex neuronal phenotypes of neurodevelpmental disorders. In this review, we discuss the recent discoveries regarding the molecular and cellular functions of Auts2. Auts2 was shown to be a key-regulator of transcriptional network and a mediator of epigenetic regulation in neurodevelopment, the latter potentially providing a link for the neuronal changes of ASD upon environmental risk-factor exposure. In addition, Auts2 could synchronize the balance between excitation and inhibition through regulating the number of excitatory synapses. Cytoplasmic Auts2 could join the fine-tuning of actin dynamics during neuronal migration and neuritogenesis. Furthermore, Auts2 was expressed in developing mouse and human brain regions such as the frontal cortex, dorsal thalamus, and hippocampus, which have been implicated in the impaired cognitive and social function of ASD. Taken together, a comprehensive understanding of Auts2 functions can give deep insights into the cause of the heterogenous manifestation of neurodevelopmental disorders such as ASD.
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Affiliation(s)
- Wenbin Pang
- Key Laboratory of Brain Science Research & Transformation in Tropical Environment of Hainan Province, Hainan Medical University, Haikou, China
- National Health Commission (NHC) Key Laboratory of Control of Tropical Diseases, Hainan Medical University, Haikou, China
| | - Xinan Yi
- Key Laboratory of Brain Science Research & Transformation in Tropical Environment of Hainan Province, Hainan Medical University, Haikou, China
| | - Ling Li
- Department of Pediatric Rehabilitation, Hainan Women and Children's Medical Center, Haikou, China
| | - Liyan Liu
- Department of Pediatric Rehabilitation, Hainan Women and Children's Medical Center, Haikou, China
| | - Wei Xiang
- National Health Commission (NHC) Key Laboratory of Control of Tropical Diseases, Hainan Medical University, Haikou, China
| | - Le Xiao
- Key Laboratory of Brain Science Research & Transformation in Tropical Environment of Hainan Province, Hainan Medical University, Haikou, China
- Department of Pediatric Rehabilitation, Hainan Women and Children's Medical Center, Haikou, China
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7
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Eapen V. Editorial: Gilles de la Tourette Syndrome: Cross-Cultural Perspectives With a Focus on the Asia-Pacific Region. Front Psychiatry 2021; 12:678089. [PMID: 33912090 PMCID: PMC8072058 DOI: 10.3389/fpsyt.2021.678089] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/08/2021] [Accepted: 03/16/2021] [Indexed: 12/02/2022] Open
Affiliation(s)
- Valsamma Eapen
- South Western Sydney Local Health District, Sydney, NSW, Australia
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8
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Disentangling Restrictive and Repetitive Behaviors and Social Impairments in Children and Adolescents with Gilles de la Tourette Syndrome and Autism Spectrum Disorder. Brain Sci 2020; 10:brainsci10050308. [PMID: 32443587 PMCID: PMC7288270 DOI: 10.3390/brainsci10050308] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/01/2020] [Revised: 05/14/2020] [Accepted: 05/15/2020] [Indexed: 12/22/2022] Open
Abstract
Gilles de la Tourette syndrome (GTS) and autism spectrum disorder (ASD) are two neurodevelopmental disorders with male predominance, frequently comorbid, that share clinical and behavioral features. The incidence of ASD in patients affected by GTS was reported to be between 2.9% and 22.8%. We hypothesized that higher ASD rates among children affected by GTS previously reported may be due to difficulty in discriminating GTS sub-phenotypes from ASD, and the higher scores in the restrictive and repetitive behaviors in particular may represent at least a “false comorbidity”. We studied a large population of 720 children and adolescents affected by GTS (n = 400) and ASD (n = 320), recruited from a single center. Patients were all assessed with The Yale Global Tic Severity Rating Scale (YGTSS), The Autism Diagnostic Observation Schedule (ADOS), The Autism Diagnostic Interview Revised (ADI-R), The Children’s Yale–Brown Obsessive–Compulsive Scale (CY-BOCS), and The Children’s Yale–Brown Obsessive–Compulsive Scale for autism spectrum disorder (CY-BOCS ASD). Our results showed statistically significant differences in ADOS scores for social aspects between GTS with comorbid attention deficit hyperactivity disorder (ADHD) and obsessive–compulsive disorder (OCD) sub-phenotypes and ASD. No differences were present when we compared GTS with comorbid ASD sub-phenotype to ASD, while repetitive and restrictive behavior scores in ASD did not present statistical differences in the comparison with GTS and comorbid OCD and ASD sub-phenotypes. We also showed that CY-BOCS ASD could be a useful instrument to correctly identify OCD from ASD symptoms.
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9
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Clarke RA, Furlong TM, Eapen V. Tourette Syndrome Risk Genes Regulate Mitochondrial Dynamics, Structure, and Function. Front Psychiatry 2020; 11:556803. [PMID: 33776808 PMCID: PMC7987655 DOI: 10.3389/fpsyt.2020.556803] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/28/2020] [Accepted: 11/23/2020] [Indexed: 11/13/2022] Open
Abstract
Gilles de la Tourette syndrome (GTS) is a neurodevelopmental disorder characterized by motor and vocal tics with an estimated prevalence of 1% in children and adolescents. GTS has high rates of inheritance with many rare mutations identified. Apart from the role of the neurexin trans-synaptic connexus (NTSC) little has been confirmed regarding the molecular basis of GTS. The NTSC pathway regulates neuronal circuitry development, synaptic connectivity and neurotransmission. In this study we integrate GTS mutations into mitochondrial pathways that also regulate neuronal circuitry development, synaptic connectivity and neurotransmission. Many deleterious mutations in GTS occur in genes with complementary and consecutive roles in mitochondrial dynamics, structure and function (MDSF) pathways. These genes include those involved in mitochondrial transport (NDE1, DISC1, OPA1), mitochondrial fusion (OPA1), fission (ADCY2, DGKB, AMPK/PKA, RCAN1, PKC), mitochondrial metabolic and bio-energetic optimization (IMMP2L, MPV17, MRPL3, MRPL44). This study is the first to develop and describe an integrated mitochondrial pathway in the pathogenesis of GTS. The evidence from this study and our earlier modeling of GTS molecular pathways provides compounding support for a GTS deficit in mitochondrial supply affecting neurotransmission.
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Affiliation(s)
- Raymond A Clarke
- School of Psychiatry, University of New South Wales, Sydney, NSW, Australia.,Ingham Institute for Applied Medical Research, Liverpool, NSW, Australia
| | - Teri M Furlong
- School of Medical Sciences, University of New South Wales, Sydney, NSW, Australia
| | - Valsamma Eapen
- School of Psychiatry, University of New South Wales, Sydney, NSW, Australia.,Ingham Institute for Applied Medical Research, Liverpool, NSW, Australia.,South West Sydney Local Health District, Liverpool Hospital, Liverpool, NSW, Australia
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10
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Jia G, Li Y, Zhang H, Chattopadhyay I, Boeck Jensen A, Blair DR, Davis L, Robinson PN, Dahlén T, Brunak S, Benson M, Edgren G, Cox NJ, Gao X, Rzhetsky A. Estimating heritability and genetic correlations from large health datasets in the absence of genetic data. Nat Commun 2019; 10:5508. [PMID: 31796735 PMCID: PMC6890770 DOI: 10.1038/s41467-019-13455-0] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/23/2019] [Accepted: 11/08/2019] [Indexed: 11/17/2022] Open
Abstract
Typically, estimating genetic parameters, such as disease heritability and between-disease genetic correlations, demands large datasets containing all relevant phenotypic measures and detailed knowledge of family relationships or, alternatively, genotypic and phenotypic data for numerous unrelated individuals. Here, we suggest an alternative, efficient estimation approach through the construction of two disease metrics from large health datasets: temporal disease prevalence curves and low-dimensional disease embeddings. We present eleven thousand heritability estimates corresponding to five study types: twins, traditional family studies, health records-based family studies, single nucleotide polymorphisms, and polygenic risk scores. We also compute over six hundred thousand estimates of genetic, environmental and phenotypic correlations. Furthermore, we find that: (1) disease curve shapes cluster into five general patterns; (2) early-onset diseases tend to have lower prevalence than late-onset diseases (Spearman's ρ = 0.32, p < 10-16); and (3) the disease onset age and heritability are negatively correlated (ρ = -0.46, p < 10-16).
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Affiliation(s)
- Gengjie Jia
- Department of Medicine, Institute of Genomics and Systems Biology, University of Chicago, Chicago, IL, 60637, USA
| | - Yu Li
- Computational Bioscience Research Center, Computer, Electrical and Mathematical Sciences and Engineering Division, King Abdullah University of Science and Technology (KAUST), Thuwal, 23955, Saudi Arabia
| | - Hanxin Zhang
- Department of Medicine, Institute of Genomics and Systems Biology, University of Chicago, Chicago, IL, 60637, USA
- Committee on Genomics, Genetics, and Systems Biology, University of Chicago, Chicago, IL, 60637, USA
| | - Ishanu Chattopadhyay
- Department of Medicine, Institute of Genomics and Systems Biology, University of Chicago, Chicago, IL, 60637, USA
| | - Anders Boeck Jensen
- Institute for Next Generation Healthcare, Department of Genetics and Genomic Sciences, Icahn School of Medicine at Mount Sinai, New York, NY, 10029, USA
| | - David R Blair
- Department of Pediatrics, University of California San Francisco, San Francisco, CA, 94158, USA
| | - Lea Davis
- Division of Genetic Medicine, Vanderbilt University, Nashville, TN, 37232, USA
| | - Peter N Robinson
- Jackson Laboratory for Genomic Medicine, Farmington, CT, 06032, USA
| | - Torsten Dahlén
- Department of Medical Epidemiology and Biostatistics, Karolinska Institutet, Stockholm, 171 77, Sweden
| | - Søren Brunak
- Novo Nordisk Foundation Center for Protein Research, Faculty of Health and Medical Sciences, University of Copenhagen, Copenhagen, 1017, Denmark
| | - Mikael Benson
- Centre for Individualized Medicine, Department of Pediatrics, Linkoping University, Linkoping, 58183, Sweden
| | - Gustaf Edgren
- Department of Medical Epidemiology and Biostatistics, Karolinska Institutet, Stockholm, 171 77, Sweden
| | - Nancy J Cox
- Division of Genetic Medicine, Vanderbilt University, Nashville, TN, 37232, USA
| | - Xin Gao
- Computational Bioscience Research Center, Computer, Electrical and Mathematical Sciences and Engineering Division, King Abdullah University of Science and Technology (KAUST), Thuwal, 23955, Saudi Arabia
| | - Andrey Rzhetsky
- Department of Medicine, Institute of Genomics and Systems Biology, University of Chicago, Chicago, IL, 60637, USA.
- Committee on Genomics, Genetics, and Systems Biology, University of Chicago, Chicago, IL, 60637, USA.
- Department of Human Genetics, University of Chicago, Chicago, IL, 60637, USA.
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11
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Eapen V, McPherson S, Karlov L, Nicholls L, Črnčec R, Mulligan A. Social communication deficits and restricted repetitive behavior symptoms in Tourette syndrome. Neuropsychiatr Dis Treat 2019; 15:2151-2160. [PMID: 31440054 PMCID: PMC6666375 DOI: 10.2147/ndt.s210227] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/27/2019] [Accepted: 07/01/2019] [Indexed: 12/15/2022] Open
Abstract
Background: Autism spectrum disorders (ASD) have been found to occur more frequently in individuals with Tourette syndrome (TS) than in the general population. Similarities exist between ASD and TS clinically, which suggests a potential relationship between the two conditions. Purpose: The purpose of this study was to explore the occurrence of autism-related features in ASD and TS, focusing on areas of overlap and difference. Patients and methods: This study examined the nature and extent of autistic traits as measured by the Social Communication Questionnaire (SCQ) in a sample with a diagnosis of TS, a sample diagnosed to have ASD, and a normative general population sample. Results: The TS sample had significantly higher mean SCQ scores than the general population, but generally lower scores than the ASD sample. The group differences in mean SCQ scores between the TS and ASD sample were significant except in the domain of restricted repetitive behaviours (RRB). Conclusion: This suggests that ASD traits occur commonly in the TS population, with a significant overlap in certain clinical features. This was especially the case for complex movements or repetitive behaviours, which may represent either: i) a shared phenotype which is subclinical, ii) a phenocopy where some clinical symptoms mimic each other, or iii) a co-morbidity. Awareness of this association can be useful in identifying these symptoms as part of the comprehensive assessment of TS and addressing these to improve the overall clinical outcomes in these patients.
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Affiliation(s)
- Valsamma Eapen
- School of Psychiatry , University of New South Wales, Sydney, NSW, Australia
| | - Sarah McPherson
- Medical Oncology, The Canberra Hospital, Canberra, ACT, Australia
| | - Lisa Karlov
- School of Psychiatry , University of New South Wales, Sydney, NSW, Australia
| | - Laura Nicholls
- School of Psychiatry , University of New South Wales, Sydney, NSW, Australia
| | - Rudi Črnčec
- Penrith Therapy Centre, Penrith, NSW, Australia
| | - Aisling Mulligan
- Department of Child and Adolescent Psychiatry, University College Dublin, Dublin, Ireland
- Dublin North City and County Child and Adolescent Mental Health Service, Health Services Executive, Dublin, Ireland
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12
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Kreilaus F, Chesworth R, Eapen V, Clarke R, Karl T. First behavioural assessment of a novel Immp2l knockdown mouse model with relevance for Gilles de la Tourette syndrome and Autism spectrum disorder. Behav Brain Res 2019; 374:112057. [PMID: 31233820 DOI: 10.1016/j.bbr.2019.112057] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/26/2019] [Revised: 06/20/2019] [Accepted: 06/20/2019] [Indexed: 11/26/2022]
Abstract
Gilles de la Tourette syndrome (GTS) is a neurodevelopmental disorder, which shares some clinical features with Autism spectrum disorder (ASD). The genetic factors relevant to the development of both disorders are yet to be fully understood, however, some genetic association studies have identified inner mitochondrial membrane peptidase subunit 2 (IMMP2L) as a potential risk gene for both GTS and ASD. The impact of Immp2l deficiency on behavioural domains is currently unknown. A new genetic mouse model for Immp2l was developed. Adult heterozygous (HET) and homozygous (HOMO) Immp2l knockdown (Immp2l KD) mice of both sexes were compared to wild type-like (WT) littermates in the open field (OF), social interaction, novel object recognition, marble burying, and prepulse inhibition (PPI). The effect of acute dexamphetamine (2 mg/kg) on OF behaviour was also determined. OF locomotion was significantly higher in HET compared to HOMO male littermates. Male and female HOMO mice were much more sensitive to the locomotor-stimulating effects of dexamphetamine (DEX), whereas only HOMO males exhibited significant increased DEX-induced OF exploration compared to control groups. HOMO females failed to habituate to an acoustic startle stimulus. Furthermore, compared to HOMO females, HET females showed reduced social interaction, and a similar trend was seen in HET males. The Immp2l KD mouse model possesses moderate face validity for preclinical research into GTS and ASD, in particular as dysfunctional dopaminergic neurotransmission appears to be one mechanism leading to disease presentation. The sex-dependent differences observed in most findings reinforce the strong influence of sex in the pathophysiology of GTS and ASD.
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Affiliation(s)
- Fabian Kreilaus
- School of Medicine, Western Sydney University, NSW 2560, Australia
| | - Rose Chesworth
- School of Medicine, Western Sydney University, NSW 2560, Australia
| | - Valsamma Eapen
- School of Psychiatry, Faculty of Medicine and Ingham Institute, University of New South Wales, NSW, 2052, Australia
| | - Raymond Clarke
- School of Psychiatry, Faculty of Medicine and Ingham Institute, University of New South Wales, NSW, 2052, Australia.
| | - Tim Karl
- School of Medicine, Western Sydney University, NSW 2560, Australia; Neuroscience Research Australia (NeuRA), NSW, 2031, Australia; School of Medical Sciences, University of New South Wales, NSW, 2052, Australia.
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13
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Spann MN, Timonen-Soivio L, Suominen A, Cheslack-Postava K, McKeague IW, Sourander A, Brown AS. Proband and Familial Autoimmune Diseases Are Associated With Proband Diagnosis of Autism Spectrum Disorders. J Am Acad Child Adolesc Psychiatry 2019; 58:496-505. [PMID: 30975444 PMCID: PMC6631342 DOI: 10.1016/j.jaac.2018.09.444] [Citation(s) in RCA: 16] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/23/2018] [Revised: 08/27/2018] [Accepted: 09/13/2018] [Indexed: 12/22/2022]
Abstract
OBJECTIVE There is evidence that parental autoimmune diseases (ADs) are associated with autism spectrum disorders (ASD) in offspring. The association between offspring ASD and ADs diagnosed in siblings and probands remains less clear. We examined whether proband and familial diagnoses of ADs were associated with increased odds of ASD in probands. METHOD The study is based on a nested case-control design that used data from a large national birth cohort (N = 1.2 million) in Finland. There were 4,600 cases of ASD and controls matched 1:4 on date of birth, sex, and residence. Data were accessed from national medical, birth, and central registries. RESULTS Probands had a statistically significant increase in odds of ASD when they (adjusted odds ratio [OR] = 1.2), their mother (adjusted OR = 1.1), or their sibling (adjusted OR = 1.2) were diagnosed with an AD. With regard to specific ADs, we found a statistically significant increase in odds of ASD in probands diagnosed with autoimmune thyroiditis (adjusted OR = 2.7). Further analyses considering ADs by body system yielded a statistically significant increase in odds of ASD in probands with ADs associated with the central/peripheral nervous (adjusted OR = 4.8) and skin/mucous membrane (adjusted OR = 1.3) systems. Probands of mothers diagnosed with ear/eye (adjusted OR = 1.6) or respiratory (adjusted OR = 1.4) ADs, or siblings diagnosed with skin/mucous membrane ADs (adjusted OR = 1.3) also had increased odds of ASD. CONCLUSION The findings suggest that there may be common pathogenic, developmental mechanisms related to autoimmunity that are associated with the etiology of ASD.
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Affiliation(s)
- Marisa N Spann
- Columbia University Irving Medical Center, New York, NY.
| | - Laura Timonen-Soivio
- University of Turku and Turku University Central Hospital, Turku, Finland; Helsinki University Central Hospital, Finland
| | - Auli Suominen
- University of Turku and Turku University Central Hospital, Turku, Finland
| | | | - Ian W McKeague
- Columbia University Mailman School of Public Health, New York, NY
| | - Andre Sourander
- Columbia University Irving Medical Center, New York, NY; University of Turku and Turku University Central Hospital, Turku, Finland; Helsinki University Central Hospital, Finland
| | - Alan S Brown
- Columbia University Irving Medical Center, New York, NY; New York State Psychiatric Institute, New York, NY
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14
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Yang C, Li J, Wu Q, Yang X, Huang AY, Zhang J, Ye AY, Dou Y, Yan L, Zhou WZ, Kong L, Wang M, Ai C, Yang D, Wei L. AutismKB 2.0: a knowledgebase for the genetic evidence of autism spectrum disorder. DATABASE-THE JOURNAL OF BIOLOGICAL DATABASES AND CURATION 2018; 2018:5134097. [PMID: 30339214 PMCID: PMC6193446 DOI: 10.1093/database/bay106] [Citation(s) in RCA: 24] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 02/10/2018] [Accepted: 09/18/2018] [Indexed: 01/15/2023]
Abstract
Autism spectrum disorder (ASD) is a complex neurodevelopmental disorder with strong genetic contributions. To provide a comprehensive resource for the genetic evidence of ASD, we have updated the Autism KnowledgeBase (AutismKB) to version 2.0. AutismKB 2.0 integrates multiscale genetic data on 1379 genes, 5420 copy number variations and structural variations, 11 669 single-nucleotide variations or small insertions/deletions (SNVs/indels) and 172 linkage regions. In particular, AutismKB 2.0 highlights 5669 de novo SNVs/indels due to their significant contribution to ASD genetics and includes 789 mosaic variants due to their recently discovered contributions to ASD pathogenesis. The genes and variants are annotated extensively with genetic evidence and clinical evidence. To help users fully understand the functional consequences of SNVs and small indels, we provided comprehensive predictions of pathogenicity with iFish, SIFT, Polyphen etc. To improve user experiences, the new version incorporates multiple query methods, including simple query, advanced query and batch query. It also functionally integrates two analytical tools to help users perform downstream analyses, including a gene ranking tool and an enrichment analysis tool, KOBAS. AutismKB 2.0 is freely available and can be a valuable resource for researchers.
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Affiliation(s)
- Changhong Yang
- College of Life Sciences, Beijing Normal University, Beijing, China.,National Institute of Biological Sciences, Beijing, China
| | - Jiarui Li
- Institute of Infectious Diseases, Beijing Key Laboratory of Emerging Infectious Diseases, Beijing Ditan Hospital Capital Medical University, Beijing, China
| | - Qixi Wu
- Peking-Tsinghua Center for Life Sciences, Beijing, China.,School of Life Sciences, Peking University, Beijing, China
| | - Xiaoxu Yang
- Center for Bioinformatics, State Key Laboratory of Protein and Plant Gene Research, School of Life Sciences, Peking University, Beijing, China
| | - August Yue Huang
- Center for Bioinformatics, State Key Laboratory of Protein and Plant Gene Research, School of Life Sciences, Peking University, Beijing, China
| | - Jie Zhang
- National Institute of Biological Sciences, Beijing, China.,Center for Bioinformatics, State Key Laboratory of Protein and Plant Gene Research, School of Life Sciences, Peking University, Beijing, China
| | - Adam Yongxin Ye
- Peking-Tsinghua Center for Life Sciences, Beijing, China.,Center for Bioinformatics, State Key Laboratory of Protein and Plant Gene Research, School of Life Sciences, Peking University, Beijing, China.,Academy for Advanced Interdisciplinary Studies, Peking University, Beijing, China
| | - Yanmei Dou
- Center for Bioinformatics, State Key Laboratory of Protein and Plant Gene Research, School of Life Sciences, Peking University, Beijing, China
| | - Linlin Yan
- Center for Bioinformatics, State Key Laboratory of Protein and Plant Gene Research, School of Life Sciences, Peking University, Beijing, China
| | - Wei-Zhen Zhou
- Center for Bioinformatics, State Key Laboratory of Protein and Plant Gene Research, School of Life Sciences, Peking University, Beijing, China.,State Key Laboratory of Cardiovascular Disease, Beijing Key Laboratory for Molecular Diagnostics of Cardiovascular Diseases, Diagnostic Laboratory Service, Fuwai Hospital, National Center for Cardiovascular Diseases, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing, China
| | - Lei Kong
- Center for Bioinformatics, State Key Laboratory of Protein and Plant Gene Research, School of Life Sciences, Peking University, Beijing, China
| | - Meng Wang
- Center for Bioinformatics, State Key Laboratory of Protein and Plant Gene Research, School of Life Sciences, Peking University, Beijing, China
| | - Chen Ai
- Center for Bioinformatics, State Key Laboratory of Protein and Plant Gene Research, School of Life Sciences, Peking University, Beijing, China
| | - Dechang Yang
- Center for Bioinformatics, State Key Laboratory of Protein and Plant Gene Research, School of Life Sciences, Peking University, Beijing, China
| | - Liping Wei
- Center for Bioinformatics, State Key Laboratory of Protein and Plant Gene Research, School of Life Sciences, Peking University, Beijing, China
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15
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Lack of association between SLC5A7 polymorphisms and Tourette syndrome in a Chinese Han population. Neurosci Lett 2017; 658:161-164. [PMID: 28830823 DOI: 10.1016/j.neulet.2017.08.041] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/06/2016] [Revised: 08/14/2017] [Accepted: 08/15/2017] [Indexed: 11/22/2022]
Abstract
Although Tourette syndrome (TS) is a chronic neuropsychiatric disorder whose pathogenesis remains unclear, genetic factors play an important role in the occurrence and development. A variety of studies have been shown that the candidate genes related to cholinergic neurons may be associated with the onset of TS. To investigate the association between the SLC5A7 polymorphisms and Tourette syndrome (TS) in the Chinese Han population, the SNP rs1013940, rs2433718, and rs4676169 were genotyped in 401 TS trios and 400 controls. The transmission disequilibrium test (TDT) and haplotype relative risk (HRR) compared genetic distributions of trios, while the chi-square test compared patients and controls. However, no transmission disequilibrium was found between the three SLC5A7 SNPs and TS. Therefore, we think that this gene may not be the main risk factor on the onset of TS. However, these results should be further validated in different populations.
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16
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Dai Y, Zhao Y, Tomi M, Shin BC, Thamotharan S, Mazarati A, Sankar R, Wang EA, Cepeda C, Levine MS, Zhang J, Frew A, Alger JR, Clark PM, Sondhi M, Kositamongkol S, Leibovitch L, Devaskar SU. Sex-Specific Life Course Changes in the Neuro-Metabolic Phenotype of Glut3 Null Heterozygous Mice: Ketogenic Diet Ameliorates Electroencephalographic Seizures and Improves Sociability. Endocrinology 2017; 158:936-949. [PMID: 28324109 PMCID: PMC5460805 DOI: 10.1210/en.2016-1816] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/03/2016] [Accepted: 01/18/2017] [Indexed: 01/13/2023]
Abstract
We tested the hypothesis that exposure of glut3+/- mice to a ketogenic diet ameliorates autism-like features, which include aberrant behavior and electrographic seizures. We first investigated the life course sex-specific changes in basal plasma-cerebrospinal fluid (CSF)-brain metabolic profile, brain glucose transport/uptake, glucose and monocarboxylate transporter proteins, and adenosine triphosphate (ATP) in the presence or absence of systemic insulin administration. Glut3+/- male but not female mice (5 months of age) displayed reduced CSF glucose/lactate concentrations with no change in brain Glut1, Mct2, glucose uptake or ATP. Exogenous insulin-induced hypoglycemia increased brain glucose uptake in glut3+/- males alone. Higher plasma-CSF ketones (β-hydroxybutyrate) and lower brain Glut3 in females vs males proved protective in the former while enhancing vulnerability in the latter. As a consequence, increased synaptic proteins (neuroligin4 and SAPAP1) with spontaneous excitatory postsynaptic activity subsequently reduced hippocampal glucose content and increased brain amyloid β1-40 deposition in an age-dependent manner in glut3+/- males but not females (4 to 24 months of age). We then explored the protective effect of a ketogenic diet on ultrasonic vocalization, sociability, spatial learning and memory, and electroencephalogram seizures in male mice (7 days to 6 to 8 months of age) alone. A ketogenic diet partially restored sociability without affecting perturbed vocalization, spatial learning and memory, and reduced seizure events. We conclude that (1) sex-specific and age-dependent perturbations underlie the phenotype of glut3+/- mice, and (2) a ketogenic diet ameliorates seizures caused by increased cortical excitation and improves sociability, but fails to rescue vocalization and cognitive deficits in glut3+/- male mice.
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Affiliation(s)
- Yun Dai
- Department of Pediatrics, Division of Neonatology & Developmental Biology, Neonatal Research Center at the UCLA Children’s Discovery and Innovation Institute
| | - Yuanzi Zhao
- Department of Pediatrics, Division of Neonatology & Developmental Biology, Neonatal Research Center at the UCLA Children’s Discovery and Innovation Institute
| | - Masatoshi Tomi
- Department of Pediatrics, Division of Neonatology & Developmental Biology, Neonatal Research Center at the UCLA Children’s Discovery and Innovation Institute
| | - Bo-Chul Shin
- Department of Pediatrics, Division of Neonatology & Developmental Biology, Neonatal Research Center at the UCLA Children’s Discovery and Innovation Institute
| | - Shanthie Thamotharan
- Department of Pediatrics, Division of Neonatology & Developmental Biology, Neonatal Research Center at the UCLA Children’s Discovery and Innovation Institute
| | | | - Raman Sankar
- Department of Pediatrics, Division of Neurology
- Department of Neurology
| | - Elizabeth A. Wang
- Intellectual and Developmental Disabilities Research Center and Brain Research Institute
| | - Carlos Cepeda
- Intellectual and Developmental Disabilities Research Center and Brain Research Institute
| | - Michael S. Levine
- Intellectual and Developmental Disabilities Research Center and Brain Research Institute
| | - Jingjing Zhang
- Department of Neurology
- Intellectual and Developmental Disabilities Research Center and Brain Research Institute
| | - Andrew Frew
- Department of Neurology
- Ahmanson-Lovelace Brain Mapping Center
| | - Jeffry R. Alger
- Department of Neurology
- Ahmanson-Lovelace Brain Mapping Center
| | - Peter M. Clark
- Department of Molecular and Medical Pharmacology and Crump Institute for Molecular Imaging, David Geffen School of Medicine at UCLA, Los Angeles, California 90095
| | - Monica Sondhi
- Department of Pediatrics, Division of Neonatology & Developmental Biology, Neonatal Research Center at the UCLA Children’s Discovery and Innovation Institute
| | - Sudatip Kositamongkol
- Department of Pediatrics, Division of Neonatology & Developmental Biology, Neonatal Research Center at the UCLA Children’s Discovery and Innovation Institute
| | - Leah Leibovitch
- Department of Pediatrics, Division of Neonatology & Developmental Biology, Neonatal Research Center at the UCLA Children’s Discovery and Innovation Institute
| | - Sherin U. Devaskar
- Department of Pediatrics, Division of Neonatology & Developmental Biology, Neonatal Research Center at the UCLA Children’s Discovery and Innovation Institute
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17
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Barnhill J, Bedford J, Crowley J, Soda T. A search for the common ground between Tic; Obsessive-compulsive and Autism Spectrum Disorders: part I, Tic disorders. AIMS GENETICS 2017; 4:32-46. [PMID: 31435502 PMCID: PMC6690237 DOI: 10.3934/genet.2017.1.32] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Subscribe] [Scholar Register] [Received: 11/30/2016] [Accepted: 02/09/2017] [Indexed: 01/14/2023]
Abstract
This article is the first of four articles designed to explore the complex interrelationship between Autism Spectrum Disorders (ASD); Obsessive compulsive and Related Disorders (OCRD) and Tic Disorders/Tourette's Syndrome (TD/TS). We begin with an overview TD/TS and follow-up with reviews of OCRD and ASD. The final article in this series represents a synthesis of the neurobiological and genetic markers shared by patients presenting with all three syndromes. The goal is to describe the complex endophenotype of these patients in an effort to better define gene markers that underlie these heterogeneous clinical syndromes. Tic disorders (TD) are a collection of hyperkinetic movements that begin in early childhood. Tics are transient for most affected preschool children but a subgroup development persistent movements or progress to develop Tourette Syndrome (TS). TDs as a group display high heritability rates but definitive gene markers still elude us. The difficulty defining genetic markers is in large part due to the diverse neurodevelopmental trajectory, changing topography and typology, development of a broad spectrum of neurocognitive and behavioral complications, and a mixed pattern of psychiatric comorbidities.
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Affiliation(s)
- Jarrett Barnhill
- Department of Psychiatry, University of North Carolina School of Medicine, Chapel Hill, NC, USA
| | - James Bedford
- Department of Psychiatry, University of North Carolina School of Medicine, Chapel Hill, NC, USA
| | - James Crowley
- Department of Psychiatry, University of North Carolina School of Medicine, Chapel Hill, NC, USA.,Department of Genetics, University of North Carolina, Chapel Hill, NC, USA.,Department of Clinical Neuroscience, Karolinska Institutet, Stockholm, Sweden
| | - Takahiro Soda
- Department of Psychiatry, University of North Carolina School of Medicine, Chapel Hill, NC, USA
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18
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CTNNA3 discordant regulation of nested LRRTM3, implications for autism spectrum disorder and Tourette syndrome. Meta Gene 2017. [DOI: 10.1016/j.mgene.2016.11.003] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
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19
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Paschou P, Müller-Vahl K. Editorial: The Neurobiology and Genetics of Gilles de la Tourette Syndrome: New Avenues through Large-Scale Collaborative Projects. Front Psychiatry 2017; 8:197. [PMID: 29075205 PMCID: PMC5641546 DOI: 10.3389/fpsyt.2017.00197] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/28/2017] [Accepted: 09/21/2017] [Indexed: 11/17/2022] Open
Affiliation(s)
- Peristera Paschou
- Department of Biological Sciences, Purdue University, West Lafayette, IN, United States
| | - Kirsten Müller-Vahl
- Department of Psychiatry, Socialpsychiatry and Psychotherapy, Hannover Medical School, Hannover, Germany
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20
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Resting-State Functional Connectivity in the Human Connectome Project: Current Status and Relevance to Understanding Psychopathology. Harv Rev Psychiatry 2017; 25:209-217. [PMID: 28816791 PMCID: PMC5644502 DOI: 10.1097/hrp.0000000000000166] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Abstract
A key tenet of modern psychiatry is that psychiatric disorders arise from abnormalities in brain circuits that support human behavior. Our ability to examine hypotheses around circuit-level abnormalities in psychiatric disorders has been made possible by advances in human neuroimaging technologies. These advances have provided the basis for recent efforts to develop a more complex understanding of the function of brain circuits in health and of their relationship to behavior-providing, in turn, a foundation for our understanding of how disruptions in such circuits contribute to the development of psychiatric disorders. This review focuses on the use of resting-state functional connectivity MRI to assess brain circuits, on the advances generated by the Human Connectome Project, and on how these advances potentially contribute to understanding neural circuit dysfunction in psychopathology. The review gives particular attention to the methods developed by the Human Connectome Project that may be especially relevant to studies of psychopathology; it outlines some of the key findings about what constitutes a brain region; and it highlights new information about the nature and stability of brain circuits. Some of the Human Connectome Project's new findings particularly relevant to psychopathology-about neural circuits and their relationships to behavior-are also presented. The review ends by discussing the extension of Human Connectome Project methods across the lifespan and into manifest illness. Potential treatment implications are also considered.
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21
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Torres AR, Sweeten TL, Johnson RC, Odell D, Westover JB, Bray-Ward P, Ward DC, Davies CJ, Thomas AJ, Croen LA, Benson M. Common Genetic Variants Found in HLA and KIR Immune Genes in Autism Spectrum Disorder. Front Neurosci 2016; 10:463. [PMID: 27812316 PMCID: PMC5071356 DOI: 10.3389/fnins.2016.00463] [Citation(s) in RCA: 29] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/08/2016] [Accepted: 09/26/2016] [Indexed: 11/13/2022] Open
Abstract
The "common variant-common disease" hypothesis was proposed to explain diseases with strong inheritance. This model suggests that a genetic disease is the result of the combination of several common genetic variants. Common genetic variants are described as a 5% frequency differential between diseased vs. matched control populations. This theory was recently supported by an epidemiology paper stating that about 50% of genetic risk for autism resides in common variants. However, rare variants, rather than common variants, have been found in numerous genome wide genetic studies and many have concluded that the "common variant-common disease" hypothesis is incorrect. One interpretation is that rare variants are major contributors to genetic diseases and autism involves the interaction of many rare variants, especially in the brain. It is obvious there is much yet to be learned about autism genetics. Evidence has been mounting over the years indicating immune involvement in autism, particularly the HLA genes on chromosome 6 and KIR genes on chromosome 19. These two large multigene complexes have important immune functions and have been shown to interact to eliminate unwanted virally infected and malignant cells. HLA proteins have important functions in antigen presentation in adaptive immunity and specific epitopes on HLA class I proteins act as cognate ligands for KIR receptors in innate immunity. Data suggests that HLA alleles and KIR activating genes/haplotypes are common variants in different autism populations. For example, class I allele (HLA-A2 and HLA-G 14 bp-indel) frequencies are significantly increased by more than 5% over control populations (Table 2). The HLA-DR4 Class II and shared epitope frequencies are significantly above the control populations (Table 2). Three activating KIR genes: 3DS1, 2DS1, and 2DS2 have increased frequencies of 15, 22, and 14% in autism populations, respectively. There is a 6% increase in total activating KIR genes in autism over control subjects. And, more importantly there is a 12% increase in activating KIR genes and their cognate HLA alleles over control populations (Torres et al., 2012a). These data suggest the interaction of HLA ligand/KIR receptor pairs encoded on two different chromosomes is more significant as a ligand/receptor complex than separately in autism.
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Affiliation(s)
- Anthony R. Torres
- Center for Persons with Disabilities, Utah State UniversityLogan, UT, USA
| | | | - Randall C. Johnson
- BSP CCR Genetics Core, SAIC-Frederick, Inc., Frederick National Laboratory for Cancer ResearchFrederick, MD, USA
| | - Dennis Odell
- Center for Persons with Disabilities, Utah State UniversityLogan, UT, USA
| | - Jonna B. Westover
- Center for Persons with Disabilities, Utah State UniversityLogan, UT, USA
| | - Patricia Bray-Ward
- Center for Persons with Disabilities, Utah State UniversityLogan, UT, USA
| | - David C. Ward
- Center for Persons with Disabilities, Utah State UniversityLogan, UT, USA
| | | | - Aaron J. Thomas
- Division of Research, Kaiser Permanente of Northern CaliforniaOakland, CA, USA
| | - Lisa A. Croen
- Center for Integrated BioSystems, Utah State UniversityLogan, UT, USA
| | - Michael Benson
- Center for Persons with Disabilities, Utah State UniversityLogan, UT, USA
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22
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Karagiannidis I, Tsetsos F, Padmanabhuni SS, Alexander J, Georgitsi M, Paschou P. The Genetics of Gilles de la Tourette Syndrome: a Common Aetiological Basis with Comorbid Disorders? Curr Behav Neurosci Rep 2016. [DOI: 10.1007/s40473-016-0088-z] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
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23
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Robertson MM. Tourette syndrome in children and adolescents: aetiology, presentation and treatment. BJPSYCH ADVANCES 2016. [DOI: 10.1192/apt.bp.114.014092] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
Abstract
SummaryTourette syndrome is a complex neuropsychiatric disorder of juvenile onset, characterised by motor and phonic tics. It is associated with a number of comorbid psychiatric conditions and a reduced quality of life in the young person and with parenting stress, caregiver burden and psychopathology in the parents. The global prevalence (about 1%) is higher than previously thought, with a strong male preponderance. Evidence is emerging that Tourette syndrome is not a unified disorder; rather, it encompasses a number of subtypes, characterised by complexity of tics and the simultaneous presence of other behaviours or disorders. This article discusses the aetiology of the syndrome, and examines its clinical features and comorbid psychiatric conditions and psychopathologies. Assessment and diagnosis are also discussed. Psychoeducation is a cornerstone of management, augmented with behavioural and/or pharmacological treatments. Newer therapies, such as deep brain stimulation, offer tantalising possibilities, but further research is still needed.
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24
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Huisman-van Dijk HM, van de Schoot R, Rijkeboer MM, Mathews CA, Cath DC. The relationship between tics, OC, ADHD and autism symptoms: A cross- disorder symptom analysis in Gilles de la Tourette syndrome patients and family-members. Psychiatry Res 2016; 237:138-46. [PMID: 26826899 PMCID: PMC5137472 DOI: 10.1016/j.psychres.2016.01.051] [Citation(s) in RCA: 62] [Impact Index Per Article: 7.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/27/2015] [Revised: 11/21/2015] [Accepted: 01/21/2016] [Indexed: 01/22/2023]
Abstract
Gilles de la Tourette's syndrome (GTS) is a disorder in which obsessive-compulsive (OC), Attention Deficit Hyperactivity Disorder (ADHD) and autism symptoms occur in up to 60% of patients, suggesting shared etiology. We explored the phenotypic structure of tic, OC, ADHD, and autism symptoms as measured by the YGTSS,Y-BOCS,CAARS and AQ, in 225 GTS patients and 371 family members. First, Confirmatory Factor Analyses (CFA) were performed on the symptom structure of each separate symptom scale. Second, the symptom dimensions derived from each scale were combined in one model, and correlations between them were calculated. Using the correlation matrix, Exploratory Factor Analyses (EFA) were performed on the symptom dimensions across the scales. EFA revealed a five factor structure: tic/aggression/symmetry; OC symptoms/compulsive tics/ numbers and patterns; ADHD symptoms; autism symptoms; and hoarding/inattention symptoms. The results are partly in line with the traditional categorical boundaries of the symptom scales used, and partly reveal a symptom structure that cuts through the diagnostic categories. This phenotypic structure might more closely reflect underlying etiologies than a structure that classically describes GTS patients according to absence or presence of comorbid OCD, ADHD and autism, and might inform both future genetic and treatment studies.
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Affiliation(s)
- Hilde M. Huisman-van Dijk
- Department of Clinical and Health Psychology, Faculty of Social
Sciences, Utrecht University, Netherlands,Altrecht Academic Anxiety Center, Utrecht, Netherlands
| | - Rens van de Schoot
- Department of Methods & Statistics, Faculty of Social
Sciences, Utrecht University, Netherlands,Optentia Research Program, Faculty of Humanities, North-West
University, South Africa
| | - Marleen M. Rijkeboer
- Department of Clinical and Health Psychology, Faculty of Social
Sciences, Utrecht University, Netherlands
| | - Carol A Mathews
- Department of Psychiatry, School of Medicine, University of
California, San Francisco, United States of America
| | - Dainelle C Cath
- Department of Clinical and Health Psychology, Faculty of Social
Sciences, Utrecht University, Netherlands,Altrecht Academic Anxiety Center, Utrecht, Netherlands
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25
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Haense C, Müller-Vahl KR, Wilke F, Schrader C, Capelle HH, Geworski L, Bengel FM, Krauss JK, Berding G. Effect of Deep Brain Stimulation on Regional Cerebral Blood Flow in Patients with Medically Refractory Tourette Syndrome. Front Psychiatry 2016; 7:118. [PMID: 27458389 PMCID: PMC4932098 DOI: 10.3389/fpsyt.2016.00118] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/06/2016] [Accepted: 06/15/2016] [Indexed: 11/22/2022] Open
Abstract
In this study, alterations in brain perfusion have been investigated in patients with Tourette syndrome (TS) compared with control subjects. In addition, we investigated the effects of deep brain stimulation (DBS) in both globus pallidus internus (GPi) and centromedian-parafascicular/ventralis oralis internus nuclei of the thalamus (CM/Voi) and sham (SHAM) stimulation on cerebral blood flow. In a prospective controlled, randomized, double-blind setting, five severely affected adult patients with TS with predominant motor or vocal tics (mean total tic score on the Yale Global Tic Severity Scale: 39) underwent serial brain perfusion single photon emission computed tomography with (99m)Tc-ECD. Results were compared with data from six age-matched control subjects. All patients were investigated at four different time points: once before DBS implantation (preOP) and three times postoperatively. Postoperative scans were performed in a randomized order, each after 3 months of either GPi, CM/Voi, or SHAM stimulation. At each investigation, patients were injected at rest while awake, but scanned during anesthesia. This procedure ensured that neither anesthesia nor movement artifacts influenced our results. Control subjects were investigated only once at baseline (without DBS or anesthesia). At baseline, cerebral blood flow was significantly reduced in patients with TS (preOP) compared with controls in the central region, frontal, and parietal lobe, specifically in Brodmann areas 1, 4-9, 30, 31, and 40. Significantly increased perfusion was found in the cerebellum. When comparing SHAM stimulation to preOP condition, we found significantly decreased perfusion in basal ganglia and thalamus, but increased perfusion in different parts of the frontal cortex. Compared with SHAM condition both GPi and thalamic stimulation resulted in a significant decrease in cerebral blood flow in basal ganglia and cerebellum, while perfusion in the frontal cortex was significantly increased. Our results provide substantial evidence that, in TS, brain perfusion is altered in the frontal cortex and the cerebellum and that these changes can be reversed by both GPi and CM/Voi DBS.
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Affiliation(s)
- Cathleen Haense
- Department of Nuclear Medicine, Hannover Medical School , Hannover , Germany
| | - Kirsten R Müller-Vahl
- Clinic of Psychiatry, Social Psychiatry and Psychotherapy, Hannover Medical School , Hannover , Germany
| | - Florian Wilke
- Department of Radiation Protection and Medical Physics, Hannover Medical School , Hannover , Germany
| | | | - Holger H Capelle
- Department of Neurosurgery, Hannover Medical School , Hannover , Germany
| | - Lilli Geworski
- Department of Radiation Protection and Medical Physics, Hannover Medical School , Hannover , Germany
| | - Frank M Bengel
- Department of Nuclear Medicine, Hannover Medical School , Hannover , Germany
| | - Joachim K Krauss
- Department of Neurosurgery, Hannover Medical School , Hannover , Germany
| | - Georg Berding
- Department of Nuclear Medicine, Hannover Medical School , Hannover , Germany
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Wegiel J, Flory M, Schanen NC, Cook EH, Nowicki K, Kuchna I, Imaki H, Ma SY, Wegiel J, London E, Casanova MF, Wisniewski T, Brown WT. Significant neuronal soma volume deficit in the limbic system in subjects with 15q11.2-q13 duplications. Acta Neuropathol Commun 2015; 3:63. [PMID: 26463344 PMCID: PMC4603300 DOI: 10.1186/s40478-015-0241-z] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/16/2015] [Accepted: 09/24/2015] [Indexed: 11/23/2022] Open
Abstract
Introduction Autism is diagnosed in numerous genetic and genomic developmental disorders associated with an overlap in high-risk genes and loci that underlie intellectual disability (ID) and epilepsy. The aim of this stereological study of neuronal soma volume in 25 brain structures and their subdivisions in eight individuals 9 to 26 years of age who were diagnosed with chromosome 15q11.2-13.1 duplication syndrome [dup(15)], autism, ID and epilepsy; eight age-matched subjects diagnosed with autism of unknown etiology (idiopathic autism) and seven control individuals was to establish whether defects of neuronal soma growth are a common denominator of developmental pathology in idiopathic and syndromic autism and how genetic modifications alter the trajectory of neuronal soma growth in dup(15) autism. Results Application of the Nucleator software to estimate neuronal size revealed significant neuronal soma volume deficits in 11 of 25 structures and their subregions (44 %) in subjects diagnosed with dup(15) autism, including consistent neuronal soma volume deficits in the limbic system (sectors CA2, 3 and 4 in Ammon’s horn, the second and third layers of the entorhinal cortex and in the amygdala), as well as in the thalamus, nucleus accumbens, external globus pallidus, and Ch3 nucleus in the magnocellular basal complex, and in the inferior olive in the brainstem. The second feature distinguishing dup(15) autism was persistent neuronal soma deficits in adolescents and young adults, whereas in idiopathic autism, neuronal volume deficit is most prominent in 4- to 8-year-old children but affects only a few brain regions in older subjects. Conclusions This study demonstrates that alterations in the trajectory of neuronal growth throughout the lifespan are a core pathological features of idiopathic and syndromic autism. However, dup(15) causes persistent neuronal volume deficits in adolescence and adulthood, with prominent neuronal growth deficits in all major compartments of the limbic system. The more severe neuronal nuclear and cytoplasic volume deficits in syndromic autism found in this study and the more severe focal developmental defects in the limbic system in dup(15) previously reported in this cohort may contribute to the high prevalence of early onset intractable epilepsy and sudden unexpected death in epilepsy.
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He F, Zheng Y, Huang HH, Cheng YH, Wang CY. Association between Tourette syndrome and the dopamine D3 receptor gene rs6280. Chin Med J (Engl) 2015; 128:654-8. [PMID: 25698199 PMCID: PMC4834778 DOI: 10.4103/0366-6999.151665] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022] Open
Abstract
BACKGROUND Tourette syndrome (TS) is a complex, heterozygous genetic disorder. The number of molecular genetic studies have investigated several candidate genes, particularly those implicated in the dopamine system. The dopamine D3 receptor (DRD3) gene has been considered as a candidate gene in TS. There was not any report about the association study of TS and DRD3 gene in Han Chinese population. We combined a case-control genetic association analysis and nuclear pedigrees transmission disequilibrium test (TDT) analysis to investigate the association between DRD3 gene rs6280 single nucleotide polymorphisms (SNPs) and TS in a Han Chinese population. METHODS A total of 160 TS patients was diagnosed by the diagnostic criteria of the Diagnostic and Statistical Manual of Mental Disorders, Fourth Edition. The DRD3 gene rs6280 SNPs were genotyped by TaqMan SNP genotyping assay technique in all subjects. We used a case-control genetic association analysis to compare the difference in genotype and allele frequencies between 160 TS patients and 90 healthy controls. At the same time, we used TDT analysis to identify the DRD3 gene rs6280 transmission disequilibrium among 101 nuclear pedigrees. RESULTS The genotype and allele frequency of DRD3 gene rs6280 SNPs had no statistical difference between control group (90) and TS group (160) (χ2 = 3.647, P = 0.161; χ2 = 0.643, P = 0.423) using Chi-squared test. At the basis of the 101 nuclear pedigrees, TDT analysis showed no transmission disequilibrium of DRD3 gene rs6280 SNPs (χ2 = 0; P = 1). CONCLUSIONS Our findings provide no evidence for an association between DRD3 gene rs6280 and TS in the Han Chinese population.
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Affiliation(s)
| | | | | | | | - Chuan-Yue Wang
- Department of Psychiatry, Beijing Anding Hospital, Capital Medical University; Center of Schizophrenia, Beijing Institute for Brain Disorders, Beijing 100088, China
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Nazaryan L, Bertelsen B, Padmanabhuni SS, Debes NM, LuCamp, Have CT, Tümer Z. Association study between CDH2 and Gilles de la Tourette syndrome in a Danish cohort. Psychiatry Res 2015; 228:974-5. [PMID: 26032459 DOI: 10.1016/j.psychres.2015.05.010] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/24/2015] [Revised: 04/16/2015] [Accepted: 05/08/2015] [Indexed: 10/23/2022]
Affiliation(s)
- Lusine Nazaryan
- Department of Clinical Genetics, Copenhagen University Hospital, Rigshospitalet, Glostrup, Copenhagen, Denmark
| | - Birgitte Bertelsen
- Department of Clinical Genetics, Copenhagen University Hospital, Rigshospitalet, Glostrup, Copenhagen, Denmark
| | | | - Nanette Mol Debes
- The Tourette Clinic, Department of Pediatrics, Herlev University Hospital, Herlev, Denmark
| | - LuCamp
- The Lundbeck Foundation Centre for Applied Medical Genomics in Personalized Disease Prediction, Prevention and Care, Copenhagen, Denmark
| | - Christian Theil Have
- The Novo Nordisk Foundation Center for Basic Metabolic Research, Metabolics Genetics, Universitetsparken, Copenhagen, Denmark
| | - Zeynep Tümer
- Applied Human Molecular Genetics, Kennedy Center, Copenhagen University Hospital, Rigshospitalet, Glostrup, Denmark.
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Somandepalli K, Kelly C, Reiss PT, Zuo XN, Craddock RC, Yan CG, Petkova E, Castellanos FX, Milham MP, Di Martino A. Short-term test-retest reliability of resting state fMRI metrics in children with and without attention-deficit/hyperactivity disorder. Dev Cogn Neurosci 2015; 15:83-93. [PMID: 26365788 PMCID: PMC6989828 DOI: 10.1016/j.dcn.2015.08.003] [Citation(s) in RCA: 55] [Impact Index Per Article: 6.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/02/2015] [Revised: 08/07/2015] [Accepted: 08/09/2015] [Indexed: 01/05/2023] Open
Abstract
Children with or without ADHD have moderate/high R-fMRI test–retest reliability. Reliability is greater in controls than ADHD across most R-fMRI metrics. Regional differences in ICC related to diagnostic groups reflect underlying pathophysiology for ADHD affecting both inter and intra subject variability.
To date, only one study has examined test–retest reliability of resting state fMRI (R-fMRI) in children, none in clinical developing groups. Here, we assessed short-term test–retest reliability in a sample of 46 children (11–17.9 years) with attention-deficit/hyperactivity disorder (ADHD) and 57 typically developing children (TDC). Our primary test–retest reliability measure was the intraclass correlation coefficient (ICC), quantified for a range of R-fMRI metrics. We aimed to (1) survey reliability within and across diagnostic groups, and (2) compare voxel-wise ICC between groups. We found moderate-to-high ICC across all children and within groups, with higher-order functional networks showing greater ICC. Nearly all R-fMRI metrics exhibited significantly higher ICC in TDC than in children with ADHD for one or more regions. In particular, posterior cingulate and ventral precuneus exhibited group differences in ICC across multiple measures. In the context of overall moderate-to-high test–retest reliability in children, regional differences in ICC related to diagnostic groups likely reflect the underlying pathophysiology for ADHD. Our currently limited understanding of the factors contributing to inter- and intra-subject variability in ADHD underscores the need for large initiatives aimed at examining their impact on test–retest reliability in both clinical and developing populations.
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Affiliation(s)
- Krishna Somandepalli
- Phyllis Green and Randolph Cowen Institute for Pediatric Neuroscience, The Child Study Center at NYU Langone Medical Center, 1 Park Avenue, New York, NY 10016, USA
| | - Clare Kelly
- Phyllis Green and Randolph Cowen Institute for Pediatric Neuroscience, The Child Study Center at NYU Langone Medical Center, 1 Park Avenue, New York, NY 10016, USA
| | - Philip T Reiss
- Division of Biostatistics, The Child Study Center at NYU Langone Medical Center, 1 Park Avenue, New York, NY 10016, USA; Nathan S. Kline Institute for Psychiatric Research, Orangeburg, NY, USA
| | - Xi-Nian Zuo
- Key Laboratory of Behavioral Science and Magnetic Resonance Imaging Research Center, Institute of Psychology, Chinese Academy of Sciences, Beijing 100101, China
| | - R C Craddock
- Center for the Developing Brain, Child Mind Institute, 445 Park Avenue, New York, NY 10022, USA; Center for Biomedical Imaging and Neuromodulation, Nathan S. Kline Institute for Psychiatric Research, Orangeburg, NY, USA
| | - Chao-Gan Yan
- Phyllis Green and Randolph Cowen Institute for Pediatric Neuroscience, The Child Study Center at NYU Langone Medical Center, 1 Park Avenue, New York, NY 10016, USA; Nathan S. Kline Institute for Psychiatric Research, Orangeburg, NY, USA; Key Laboratory of Behavioral Science and Magnetic Resonance Imaging Research Center, Institute of Psychology, Chinese Academy of Sciences, Beijing 100101, China
| | - Eva Petkova
- Division of Biostatistics, The Child Study Center at NYU Langone Medical Center, 1 Park Avenue, New York, NY 10016, USA; Nathan S. Kline Institute for Psychiatric Research, Orangeburg, NY, USA
| | - F X Castellanos
- Phyllis Green and Randolph Cowen Institute for Pediatric Neuroscience, The Child Study Center at NYU Langone Medical Center, 1 Park Avenue, New York, NY 10016, USA; Nathan S. Kline Institute for Psychiatric Research, Orangeburg, NY, USA
| | - Michael P Milham
- Center for the Developing Brain, Child Mind Institute, 445 Park Avenue, New York, NY 10022, USA; Center for Biomedical Imaging and Neuromodulation, Nathan S. Kline Institute for Psychiatric Research, Orangeburg, NY, USA
| | - Adriana Di Martino
- Phyllis Green and Randolph Cowen Institute for Pediatric Neuroscience, The Child Study Center at NYU Langone Medical Center, 1 Park Avenue, New York, NY 10016, USA.
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Kahl U, Schunke O, Schöttle D, David N, Brandt V, Bäumer T, Roessner V, Münchau A, Ganos C. Tic Phenomenology and Tic Awareness in Adults With Autism. Mov Disord Clin Pract 2015; 2:237-242. [PMID: 30363532 DOI: 10.1002/mdc3.12154] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/21/2014] [Revised: 12/23/2014] [Accepted: 12/27/2014] [Indexed: 11/10/2022] Open
Abstract
Background: Tics are common in people with autism spectrum disorder (ASD). However, their phenomenology and characteristics have not been studied in detail. Methods: Based on video sequences of 21 adults with ASD without intellectual disability and 16 adults with Gilles de la Tourette syndrome (GTS), tic severity, tic repertoires, and tic awareness were determined. Results: Ten ASD and all GTS participants had tics during video recordings. The ASD group had significantly fewer tics, compared to GTS. Tic distribution and tic repertoires were comparable, but more restricted in ASD. All GTS participants, but only 5 of the 10 ASD participants, were aware of their tics. Conclusions: Tics are common in adults with ASD. They are indistinguishable from tics in GTS and are similarly distributed, but less severe. Tic awareness is limited in ASD.
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Affiliation(s)
- Ursula Kahl
- Department of Neurology University Medical Center Hamburg-Eppendorf Hamburg Germany
| | - Odette Schunke
- Department of Neurology University Medical Center Hamburg-Eppendorf Hamburg Germany
| | - Daniel Schöttle
- Department of Psychiatry and Psychotherapy University Medical Center Hamburg-Eppendorf Hamburg Germany
| | - Nicole David
- Institute of Neurophysiology University Medical Center Hamburg-Eppendorf Hamburg Germany
| | - Valerie Brandt
- Department of Paediatric and Adult Movement Disorders and Neuropsychiatry Institute of Neurogenetics University of Luebeck Luebeck Germany
| | - Tobias Bäumer
- Department of Paediatric and Adult Movement Disorders and Neuropsychiatry Institute of Neurogenetics University of Luebeck Luebeck Germany
| | - Veit Roessner
- Department of Child and Adolescent Psychiatry Technical University Dresden Dresden Germany
| | - Alexander Münchau
- Department of Paediatric and Adult Movement Disorders and Neuropsychiatry Institute of Neurogenetics University of Luebeck Luebeck Germany
| | - Christos Ganos
- Department of Neurology University Medical Center Hamburg-Eppendorf Hamburg Germany.,Sobell Department of Motor Neuroscience and Movement Disorders UCL Institute of Neurology London United Kingdom
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Dietrich A, Fernandez TV, King RA, State MW, Tischfield JA, Hoekstra PJ, Heiman GA. The Tourette International Collaborative Genetics (TIC Genetics) study, finding the genes causing Tourette syndrome: objectives and methods. Eur Child Adolesc Psychiatry 2015; 24:141-51. [PMID: 24771252 PMCID: PMC4209328 DOI: 10.1007/s00787-014-0543-x] [Citation(s) in RCA: 33] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/19/2013] [Accepted: 03/26/2014] [Indexed: 01/01/2023]
Abstract
Tourette syndrome (TS) is a neuropsychiatric disorder characterized by recurrent motor and vocal tics, often accompanied by obsessive-compulsive disorder and/or attention-deficit/hyperactivity disorder. While the evidence for a genetic contribution is strong, its exact nature has yet to be clarified fully. There is now mounting evidence that the genetic risks for TS include both common and rare variants and may involve complex multigenic inheritance or, in rare cases, a single major gene. Based on recent progress in many other common disorders with apparently similar genetic architectures, it is clear that large patient cohorts and open-access repositories will be essential to further advance the field. To that end, the large multicenter Tourette International Collaborative Genetics (TIC Genetics) study was established. The goal of the TIC Genetics study is to undertake a comprehensive gene discovery effort, focusing both on familial genetic variants with large effects within multiply affected pedigrees and on de novo mutations ascertained through the analysis of apparently simplex parent-child trios with non-familial tics. The clinical data and biomaterials (DNA, transformed cell lines, RNA) are part of a sharing repository located within the National Institute for Mental Health Center for Collaborative Genomics Research on Mental Disorders, USA, and will be made available to the broad scientific community. This resource will ultimately facilitate better understanding of the pathophysiology of TS and related disorders and the development of novel therapies. Here, we describe the objectives and methods of the TIC Genetics study as a reference for future studies from our group and to facilitate collaboration between genetics consortia in the field of TS.
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Affiliation(s)
- Andrea Dietrich
- Department of Psychiatry, University Medical Center Groningen, University of Groningen, Groningen, The Netherlands
| | - Thomas V. Fernandez
- Yale Child Study Center and Department of Psychiatry, Yale University School of Medicine, New Haven, CT USA
| | - Robert A. King
- Yale Child Study Center and Department of Psychiatry, Yale University School of Medicine, New Haven, CT USA
| | - Matthew W. State
- Department of Psychiatry, University of California, San Francisco, USA
| | - Jay A. Tischfield
- Department of Genetics, The Human Genetics Institute of New Jersey, Rutgers, the State University of New Jersey, Life Science Building, 145 Bevier Road, Piscataway, NJ 08854-8082 USA
| | - Pieter J. Hoekstra
- Department of Psychiatry, University Medical Center Groningen, University of Groningen, Groningen, The Netherlands
| | - Gary A. Heiman
- Department of Genetics, The Human Genetics Institute of New Jersey, Rutgers, the State University of New Jersey, Life Science Building, 145 Bevier Road, Piscataway, NJ 08854-8082 USA
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Erickson CA, Veenstra-Vanderweele JM, Melmed RD, McCracken JT, Ginsberg LD, Sikich L, Scahill L, Cherubini M, Zarevics P, Walton-Bowen K, Carpenter RL, Bear MF, Wang PP, King BH. STX209 (arbaclofen) for autism spectrum disorders: an 8-week open-label study. J Autism Dev Disord 2014; 44:958-64. [PMID: 24272415 DOI: 10.1007/s10803-013-1963-z] [Citation(s) in RCA: 83] [Impact Index Per Article: 8.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Abstract
STX209 (arbaclofen), a selective GABA-B agonist, is hypothesized to modulate the balance of excitatory to inhibitory neurotransmission, and has shown preliminary evidence of benefit in fragile X syndrome. We evaluated its safety, tolerability, and efficacy in non-syndromic autism spectrum disorders, in an 8-week open-label trial enrolling 32 children and adolescents with either Autistic Disorder or Pervasive Developmental Disorder-Not Otherwise Specified, and a score ≥17 on the Aberrant Behavior Checklist (ABC)-Irritability subscale. STX209 was generally well-tolerated. The most common adverse events were agitation and irritability, which typically resolved without dose changes, and were often felt to represent spontaneous variation in underlying symptoms. Improvements were observed on several outcome measures in this exploratory trial, including the ABC-Irritability (the primary endpoint) and the Lethargy/Social Withdrawal subscales, the Social Responsiveness Scale, the CY-BOCS-PDD, and clinical global impression scales. Placebo-controlled study of STX209 is warranted.
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Affiliation(s)
- Craig A Erickson
- Division of Child and Adolescent Psychiatry, Cincinnati Children's Hospital Medical Center, Cincinnati, OH, USA
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Robertson MM, Eapen V. Tourette's: syndrome, disorder or spectrum? Classificatory challenges and an appraisal of the DSM criteria. Asian J Psychiatr 2014; 11:106-13. [PMID: 25453712 DOI: 10.1016/j.ajp.2014.05.010] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/29/2014] [Revised: 04/29/2014] [Accepted: 05/25/2014] [Indexed: 10/25/2022]
Abstract
The fifth version of the Diagnostic and statistical manual of mental disorders (DSM-5) was released in May 2013 after 14 years of development and almost two decades after the last edition DSM-IV was published in 1994. We review the DSM journey with regards to Tourette Syndrome from the original publication of DSM 1 in 1952 till date. In terms of changes in DSM 5, the major shift has come in the placement of Tourette Syndrome under the 'Neurodevelopmental Disorders' alongside other disorders with a developmental origin. This review provides an overview of the changes in DSM-5 highlighting key points for clinical practice and research along with a snap shot of the current use of DSM as a classificatory system in different parts of the world and suggestions for improving the subtyping and the diagnostic confidence.
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Affiliation(s)
- Mary May Robertson
- University College London, United Kingdom; Department of Neurology, Room 148, Atkinson Morley Wing, St. Georges Hospital & Medical School, Blackshaw Road, London SW17 0QT, United Kingdom.
| | - Valsamma Eapen
- School of Psychiatry & Ingham Institute, University of New South Wales; Academic Unit of Child Psychiatry, South West Sydney (AUCS), ICAMHS, Mental Health Centre, L1, Liverpool Hospital, Elizabeth Street, Liverpool, NSW 2170, Australia.
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Pauls DL, Fernandez TV, Mathews CA, State MW, Scharf JM. The Inheritance of Tourette Disorder: A review. J Obsessive Compuls Relat Disord 2014; 3:380-385. [PMID: 25506544 PMCID: PMC4260404 DOI: 10.1016/j.jocrd.2014.06.003] [Citation(s) in RCA: 65] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
Abstract
Georges Gilles de la Tourette, in describing the syndrome that now bears his name, observed that the condition aggregated within families. Over the last three decades, numerous studies have confirmed this observation, and demonstrated that familial clustering is due in part to genetic factors. Recent studies are beginning to provide clues about the underlying genetic mechanisms important for the manifestation of some cases of Tourette Disorder (TD). Evidence has come from different study designs, such as nuclear families, twins, multigenerational families, and case-control samples, together examining the broad spectrum of genetic variation including cytogenetic abnormalities, copy number variants, genome-wide association of common variants, and sequencing studies targeting rare and/or de novo variation. Each of these classes of genetic variation holds promise for identifying the causative genes and biological pathways contributing to this paradigmatic neuropsychiatric disorder.
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Affiliation(s)
- David L Pauls
- Department of Psychiatry, Harvard Medical School, Psychiatric and Neurodevelopmental Genetics Unit, Center for Human Genetic Research, Massachusetts General Hospital, Boston, MA 02114
| | - Thomas V Fernandez
- Child Study Center and Department of Psychiatry, Yale University School of Medicine, New Haven, CT 06520
| | - Carol A Mathews
- Department of Psychiatry, University of California, San Francisco, CA 94143
| | - Matthew W State
- Department of Psychiatry, University of California, San Francisco, CA 94143
| | - Jeremiah M Scharf
- Department of Psychiatry, Harvard Medical School, Psychiatric and Neurodevelopmental Genetics Unit, Center for Human Genetic Research, Massachusetts General Hospital, Boston, MA 02114 ; Department of Neurology, Harvard Medical School, Psychiatric and Neurodevelopmental Genetics Unit, Center for Human Genetic Research, Massachusetts General Hospital, Boston, MA 02114
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Ganos C, Münchau A, Bhatia KP. The Semiology of Tics, Tourette's, and Their Associations. Mov Disord Clin Pract 2014; 1:145-153. [PMID: 30363870 PMCID: PMC6183022 DOI: 10.1002/mdc3.12043] [Citation(s) in RCA: 32] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/14/2014] [Revised: 04/24/2014] [Accepted: 04/24/2014] [Indexed: 01/01/2023] Open
Abstract
Gilles de la Tourette syndrome (GTS) is a prototypical neuropsychiatric disorder breaking the boundary of disciplinary dualism between neurology and psychiatry. The diagnosis of GTS is clinical and, in most cases, straightforward. Tics as a hallmark of GTS are usually easy to recognize and distinguish from other movement disorders as fragmented, repetitive, exaggerated movements resembling normal motor behavior, but appearing out of context. In complex cases, knowledge on additional characteristics and signs as, for example, tic distribution, suggestibility, voluntary tic inhibition, and presence of echo- or paliphenomena might further aid clinical diagnosis. However, although defining GTS, tics are rarely the main issue. The presence of comorbidities and coexisting psychopathologies often hampers normal development and negatively affects quality of life. Their recognition and treatment is paramount. Here, we review existing literature and provide a comprehensive update on the multifarious aspects of the movement disorder and neuropsychiatry of GTS. We also provide a list of associated movement disorders known to occur in GTS patients and discuss differential diagnoses to be considered in atypical cases. We finally comment on available treatment options.
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Affiliation(s)
- Christos Ganos
- Sobell Department of Motor Neuroscience and Movement DisordersUCL Institute of NeurologyLondonUnited Kingdom
- Department of NeurologyUniversity Medical Center Hamburg‐Eppendorf (UKE)HamburgGermany
- Department of Pediatric and Adult Movement Disorders and NeuropsychiatryInstitute of NeurogeneticsUniversity of LübeckLübeckGermany
| | - Alexander Münchau
- Department of Pediatric and Adult Movement Disorders and NeuropsychiatryInstitute of NeurogeneticsUniversity of LübeckLübeckGermany
| | - Kailash P. Bhatia
- Sobell Department of Motor Neuroscience and Movement DisordersUCL Institute of NeurologyLondonUnited Kingdom
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A cross-sectional survey of repetitive behaviors and restricted interests in a typically developing Turkish child population. Child Psychiatry Hum Dev 2014; 45:472-82. [PMID: 24242356 DOI: 10.1007/s10578-013-0417-3] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
Abstract
This study examined compulsive-like behaviors (CLBs) which are higher-order types of Repetitive Behaviors And Restricted Interests (RBRIs) in typically developing children in Turkey. Caregivers of 1,204 children between 8 and 72 months were interviewed with Childhood Routines Inventory (CRI) by trained interviewers in a cross-sectional survey. Factor analysis of the CRI revealed two factor structures comprising "just right behaviors" and "repetitive/sensory sensitivity behaviors". CLB frequency peaked at 2-4 years with declines after age four. In contrast to the previous CRI studies reporting no gender difference, CLBs were more common in males in 12-23 and 48-59 month age groups on both total CLB frequency and repetitive/sensory sensitivity behaviors. Also ages of onsets for CRI items were somewhat later than reported in other samples. Our findings supported the findings of the previous CRI studies while also revealing new perspectives in need of further investigation.
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Gomez L, Wigg K, Zhang K, Lopez L, Sandor P, Malone M, Barr CL. Association of the KCNJ5 gene with Tourette Syndrome and Attention-Deficit/Hyperactivity Disorder. GENES BRAIN AND BEHAVIOR 2014; 13:535-42. [PMID: 24840790 DOI: 10.1111/gbb.12141] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/27/2013] [Revised: 01/23/2014] [Accepted: 05/09/2014] [Indexed: 01/01/2023]
Abstract
Linkage and association of Tourette Syndrome (TS) and Attention-Deficit/Hyperactivity Disorder (ADHD) have previously been reported in the 11q24 chromosomal region. To identify the risk gene within the region we studied the potassium inwardly-rectifying channel J5 (KCNJ5) gene in a sample of 170 nuclear families with TS. We genotyped eight markers across the gene and observed biased transmission of haplotypes from parents to probands in this sample. We then tested these markers in an independent sample of 242 nuclear families with ADHD and found the same haplotype was significantly over transmitted to ADHD probands. Screening of the coding region of KCNJ5 in 48 probands with TS did not identify any variation that could explain the association of the haplotype. We also genotyped two microsatellite markers, one in the promoter and the other in the 3' region and found no evidence for association for either marker for TS, however, we found significant evidence for association with the 3' repeat and ADHD. A small gene (c11orf45) of unknown function lies within the first intron of KCNJ5 that is transcribed in the opposite orientation and this gene may regulate the expression of KCNJ5. We studied the correlation of the expression of KCNJ5 and the antisense transcript in brain tissues from control individuals and found that the antisense transcript and the short KCNJ5 isoform are co-expressed in three brain regions. The results of this study indicate that KCNJ5 is associated with TS and ADHD in our samples, however, the functional variant(s) remain to be identified.
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Affiliation(s)
- L Gomez
- Toronto Western Research Institute, University Health Network, Toronto, Canada
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Wöhr M. Ultrasonic vocalizations in Shank mouse models for autism spectrum disorders: Detailed spectrographic analyses and developmental profiles. Neurosci Biobehav Rev 2014; 43:199-212. [DOI: 10.1016/j.neubiorev.2014.03.021] [Citation(s) in RCA: 79] [Impact Index Per Article: 7.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/27/2013] [Revised: 02/25/2014] [Accepted: 03/31/2014] [Indexed: 12/31/2022]
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Sungur AÖ, Vörckel KJ, Schwarting RKW, Wöhr M. Repetitive behaviors in the Shank1 knockout mouse model for autism spectrum disorder: developmental aspects and effects of social context. J Neurosci Methods 2014; 234:92-100. [PMID: 24820912 DOI: 10.1016/j.jneumeth.2014.05.003] [Citation(s) in RCA: 56] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/17/2013] [Revised: 04/22/2014] [Accepted: 05/01/2014] [Indexed: 01/16/2023]
Abstract
BACKGROUND Autism spectrum disorder (ASD) is characterized by persistent deficits in social behavior and communication, together with restricted and repetitive patterns of behavior. Several ASD candidate genes have been identified, including the SHANK gene family with its three family members SHANK1, SHANK2, and SHANK3. METHODS Typically, repetitive behavior in mouse models for ASD is assessed by measuring self-grooming behavior. The first aim of the current study was to assess repetitive behaviors in Shank1(-/-) null mutant, Shank1(+/-) heterozygous, and Shank1(+/+) wildtype littermate control mice by means of a comprehensive approach, including the assessment of self-grooming, digging behavior, and marble burying. The second aim was to establish a test paradigm that allows for assessing the effects of social context on the occurrence of repetitive behaviors in a genotype-dependent manner. To this aim, repetitive behaviors were repeatedly tested on three consecutive days in distinct social contexts, namely in presence or absence of social odors. RESULTS Shank1(+/-) heterozygous and to a lesser extent Shank1(-/-) null mutant mice displayed slightly elevated levels of self-grooming behavior as adults, but not as juveniles, with genotype differences being most prominent in the social context. In contrast to elevated self-grooming behavior, marble burying was strongly reduced in adult Shank1(+/-) heterozygous and Shank1(-/-) null mutant mice across social contexts, as compared to adult Shank1(+/+) wildtype littermate controls. CONCLUSION The opposite effects of the Shank1 deletion on the two types of repetitive behaviors are in line with a number of studies on repetitive behaviors in other genetic Shank models.
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Affiliation(s)
- A Özge Sungur
- Behavioral Neuroscience, Experimental and Biological Psychology, Philipps-University of Marburg, Gutenbergstr. 18, D-35032 Marburg, Germany
| | - Karl J Vörckel
- Behavioral Neuroscience, Experimental and Biological Psychology, Philipps-University of Marburg, Gutenbergstr. 18, D-35032 Marburg, Germany
| | - Rainer K W Schwarting
- Behavioral Neuroscience, Experimental and Biological Psychology, Philipps-University of Marburg, Gutenbergstr. 18, D-35032 Marburg, Germany
| | - Markus Wöhr
- Behavioral Neuroscience, Experimental and Biological Psychology, Philipps-University of Marburg, Gutenbergstr. 18, D-35032 Marburg, Germany.
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Gupta AR, Pirruccello M, Cheng F, Kang HJ, Fernandez TV, Baskin JM, Choi M, Liu L, Ercan-Sencicek AG, Murdoch JD, Klei L, Neale BM, Franjic D, Daly MJ, Lifton RP, De Camilli P, Zhao H, Sestan N, State MW. Rare deleterious mutations of the gene EFR3A in autism spectrum disorders. Mol Autism 2014; 5:31. [PMID: 24860643 PMCID: PMC4032628 DOI: 10.1186/2040-2392-5-31] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/22/2013] [Accepted: 03/28/2014] [Indexed: 12/31/2022] Open
Abstract
BACKGROUND Whole-exome sequencing studies in autism spectrum disorder (ASD) have identified de novo mutations in novel candidate genes, including the synaptic gene Eighty-five Requiring 3A (EFR3A). EFR3A is a critical component of a protein complex required for the synthesis of the phosphoinositide PtdIns4P, which has a variety of functions at the neural synapse. We hypothesized that deleterious mutations in EFR3A would be significantly associated with ASD. METHODS We conducted a large case/control association study by deep resequencing and analysis of whole-exome data for coding and splice site variants in EFR3A. We determined the potential impact of these variants on protein structure and function by a variety of conservation measures and analysis of the Saccharomyces cerevisiae Efr3 crystal structure. We also analyzed the expression pattern of EFR3A in human brain tissue. RESULTS Rare nonsynonymous mutations in EFR3A were more common among cases (16 / 2,196 = 0.73%) than matched controls (12 / 3,389 = 0.35%) and were statistically more common at conserved nucleotides based on an experiment-wide significance threshold (P = 0.0077, permutation test). Crystal structure analysis revealed that mutations likely to be deleterious were also statistically more common in cases than controls (P = 0.017, Fisher exact test). Furthermore, EFR3A is expressed in cortical neurons, including pyramidal neurons, during human fetal brain development in a pattern consistent with ASD-related genes, and it is strongly co-expressed (P < 2.2 × 10(-16), Wilcoxon test) with a module of genes significantly associated with ASD. CONCLUSIONS Rare deleterious mutations in EFR3A were found to be associated with ASD using an experiment-wide significance threshold. Synaptic phosphoinositide metabolism has been strongly implicated in syndromic forms of ASD. These data for EFR3A strengthen the evidence for the involvement of this pathway in idiopathic autism.
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Affiliation(s)
- Abha R Gupta
- Department of Pediatrics and Child Study Center, Yale School of Medicine, New Haven, CT 06520, USA
| | | | - Feng Cheng
- Department of Neurobiology, Kavli Institute for Neuroscience, Yale School of Medicine, New Haven, CT 06520, USA ; College of Pharmacy, University of South Florida, Tampa, FL 33612, USA
| | - Hyo Jung Kang
- Department of Neurobiology, Kavli Institute for Neuroscience, Yale School of Medicine, New Haven, CT 06520, USA ; Department of Life Science, Chung-Ang University, Seoul, Korea
| | - Thomas V Fernandez
- Department of Psychiatry and Child Study Center, Yale School of Medicine, New Haven, CT 06520, USA
| | - Jeremy M Baskin
- Department of Cell Biology, Howard Hughes Medical Institute, Program in Cellular Neuroscience Neurodegeneration and Repair, Yale School of Medicine, New Haven, CT 06520, USA
| | - Murim Choi
- Department of Genetics, Howard Hughes Medical Institute, Yale School of Medicine, New Haven, CT 06520, USA
| | - Li Liu
- Department of Statistics, Carnegie Mellon University, Pittsburgh, PA 15213, USA
| | | | - John D Murdoch
- Program on Neurogenetics, Child Study Center, Department of Psychiatry, Department of Genetics, Yale School of Medicine, New Haven, CT 06520, USA
| | - Lambertus Klei
- Department of Psychiatry, University of Pittsburgh School of Medicine, Pittsburgh, PA 15213, USA
| | - Benjamin M Neale
- Program in Medical and Population Genetics, Broad Institute of Harvard and MIT, Cambridge, MA 02142, USA
| | - Daniel Franjic
- Department of Neurobiology, Kavli Institute for Neuroscience, Yale School of Medicine, New Haven, CT 06520, USA
| | - Mark J Daly
- Program in Medical and Population Genetics, Broad Institute of Harvard and MIT, Cambridge, MA 02142, USA
| | - Richard P Lifton
- Department of Genetics, Howard Hughes Medical Institute, Yale School of Medicine, New Haven, CT 06520, USA
| | - Pietro De Camilli
- Department of Cell Biology, Howard Hughes Medical Institute, Program in Cellular Neuroscience Neurodegeneration and Repair, Yale School of Medicine, New Haven, CT 06520, USA
| | - Hongyu Zhao
- Departments of Biostatistics and Genetics, Yale School of Medicine, New Haven, CT 06520, USA
| | - Nenad Sestan
- Department of Neurobiology, Kavli Institute for Neuroscience, Yale School of Medicine, New Haven, CT 06520, USA
| | - Matthew W State
- Department of Psychiatry, University of California San Francisco, San Francisco, CA 94143, USA
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McBride SMJ, Holloway SL, Jongens TA. Using Drosophila as a tool to identify pharmacological therapies for fragile X syndrome. DRUG DISCOVERY TODAY. TECHNOLOGIES 2014; 10:e129-36. [PMID: 24050241 DOI: 10.1016/j.ddtec.2012.09.005] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/05/2023]
Abstract
Despite obvious differences such as the ability to fly, the fruit fly Drosophila melanogaster is similar to humans at many different levels of complexity. Studies of development, cell growth and division, metabolism and even cognition, have borne out these similarities. For example, Drosophila bearing mutations in the fly gene homologue of the known human disease fragile X are affected in fundamentally similar ways as affected humans. The ramification of this degree of similarity is that Drosophila, as a model organism, is a rich resource for learning about human cells, development and even human cognition and behavior. Drosophila has a short generation time of ten days, is cheap to propagate and maintain and has a vast array of genetic tools available to it; making Drosophila an extremely attractive organism for the study of human disease. Here, we summarize research from our lab and others using Drosophila to understand the human neurological disease, called fragile X. We focus on the Drosophila model of fragile X, its characterization, and use as a tool to identify potential drugs for the treatment of fragile X. Several clinical trials are in progress now that were motivated by this research.
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Caurín B, Serrano M, Fernández-Alvarez E, Campistol J, Pérez-Dueñas B. Environmental circumstances influencing tic expression in children. Eur J Paediatr Neurol 2014; 18:157-62. [PMID: 24210363 DOI: 10.1016/j.ejpn.2013.10.002] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/20/2013] [Revised: 10/01/2013] [Accepted: 10/17/2013] [Indexed: 12/19/2022]
Abstract
AIM To assess the clinical features and severity of tics and environmental factors influencing tic expression in a cohort of children with tic disorders. METHODS We performed a cross-sectional study in a cohort of children and adolescents (N = 92) with tic disorders referred to the outpatient clinic of a tertiary-level paediatric centre in Barcelona. The severity of tics was evaluated using the Yale Global Tic Severity Scale (YGTSS). A questionnaire including a list of environmental factors and common daily activities that might influence tic occurrence was completed for patients greater than 5 years old. RESULTS Children were classified as having Tourette syndrome (TS) (52 patients), chronic motor or phonic tics (22 patients) and tics of less than 12 months' duration (18 patients). Tics worsened with stressful situations, activities related to school, playing video games and watching TV. A significant proportion of children reported a reduction in tics while they were concentrating on artistic or creative activities or when playing sports and participating in outdoor activities. The YGTSS scores were higher for TS patients (P < .001) and correlated positively with the time of evolution of tics (r = .273, P = .026). Poor school performance was associated with TS (p = .043) and higher scores on the YGTSS (P = .018), as well as attention deficit/hyperactivity disorder (P = .007). CONCLUSIONS Several activities of daily living were identified as modifying tic severity in children and may be important clues for tic management. In a subgroup of children with TS, tics were associated with significant morbidity and poor academic performance. Our results emphasise the importance of developing specific school programmes and tailored recommendations in patients with TS.
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Affiliation(s)
- Belén Caurín
- Department of Child Neurology, Hospital Sant Joan de Déu, Universitat de Barcelona, Spain
| | - Mercedes Serrano
- Department of Child Neurology, Hospital Sant Joan de Déu, Universitat de Barcelona, Spain; Centre for Biomedical Research on Rare Diseases (CIBER-ER), Instituto de Salud Carlos III, Barcelona, Spain
| | | | - Jaume Campistol
- Department of Child Neurology, Hospital Sant Joan de Déu, Universitat de Barcelona, Spain; Centre for Biomedical Research on Rare Diseases (CIBER-ER), Instituto de Salud Carlos III, Barcelona, Spain
| | - Belén Pérez-Dueñas
- Department of Child Neurology, Hospital Sant Joan de Déu, Universitat de Barcelona, Spain; Centre for Biomedical Research on Rare Diseases (CIBER-ER), Instituto de Salud Carlos III, Barcelona, Spain.
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Volkmar F, Siegel M, Woodbury-Smith M, King B, McCracken J, State M. Practice parameter for the assessment and treatment of children and adolescents with autism spectrum disorder. J Am Acad Child Adolesc Psychiatry 2014; 53:237-57. [PMID: 24472258 DOI: 10.1016/j.jaac.2013.10.013] [Citation(s) in RCA: 334] [Impact Index Per Article: 33.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/26/2013] [Accepted: 10/26/2013] [Indexed: 12/22/2022]
Abstract
Autism spectrum disorder is characterized by patterns of delay and deviance in the development of social, communicative, and cognitive skills that arise in the first years of life. Although frequently associated with intellectual disability, this condition is distinctive in its course, impact, and treatment. Autism spectrum disorder has a wide range of syndrome expression and its management presents particular challenges for clinicians. Individuals with an autism spectrum disorder can present for clinical care at any point in development. The multiple developmental and behavioral problems associated with this condition necessitate multidisciplinary care, coordination of services, and advocacy for individuals and their families. Early, sustained intervention and the use of multiple treatment modalities are indicated.
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46
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Vaudano E. The innovative medicines initiative: a public private partnership model to foster drug discovery. Comput Struct Biotechnol J 2013; 6:e201303017. [PMID: 24688725 PMCID: PMC3962198 DOI: 10.5936/csbj.201303017] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/10/2013] [Revised: 10/19/2013] [Accepted: 11/20/2013] [Indexed: 11/23/2022] Open
Abstract
The Innovative Medicines Initiative (IMI) is a large-scale public–private partnership between the European Commission and the European Federation of Pharmaceutical Industries and Associations (EFPIA). IMI aims to boost the development of new medicines across Europe by implementing new collaborative endeavours between large pharmaceutical companies and other key actors in the health-care ecosystem, i.e., academic institutions, small and medium enterprises, patients, and regulatory authorities. Currently there are more than 40 IMI projects covering the whole value chain of pharmaceutical R&D, but with a strong focus on drug discovery, as an ideal arena where the PPP concept of pre-competitive collaboration can rapidly deliver results. This article review recent achievements of the IMI consortia of relevance to drug discovery, providing proof-of-concept evidence for the efficiency of this new model of collaboration.
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Affiliation(s)
- Elisabetta Vaudano
- Innovative Medicines Initiative, Avenue de la Toison d'Or 56-60, B-1060, Brussels, Belgium
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Sesarini CV, Costa L, Naymark M, Grañana N, Cajal AR, García Coto M, Pallia RC, Argibay PF. Evidence for interaction between markers in GABA(A) receptor subunit genes in an Argentinean autism spectrum disorder population. Autism Res 2013; 7:162-6. [PMID: 24249596 DOI: 10.1002/aur.1353] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/26/2012] [Accepted: 10/15/2013] [Indexed: 12/14/2022]
Abstract
Autism spectrum disorders (ASD) can be conceptualized as a genetic dysfunction that disrupts development and function of brain circuits mediating social cognition and language. At least some forms of ASD may be associated with high level of excitation in neural circuits, and gamma-aminobutyric acid (GABA) has been implicated in its etiology. Single-nucleotide polymorphisms (SNP) located within the GABA receptor (GABAR) subunit genes GABRA1, GABRG2, GABRB3, and GABRD were screened. A hundred and thirty-six Argentinean ASD patients and 150 controls were studied, and the contribution of the SNPs in the etiology of ASD was evaluated independently and/or through gene-gene interaction using multifactor dimensionality reduction (MDR) method. From the 18 SNP studied, 11 were not present in our Argentinean population (patients and controls) and 1 SNP had minor allele frequency < 0.1%. For the remaining six SNPs, none provided statistical significant association with ASD when considering allelic or genotypic frequencies. Non-significant association with ASD was found for the haplotype analysis. MDR identified evidence for synergy between markers in GABRB3 (chromosome 15) and GABRD (chromosome 1), suggesting potential gene-gene interaction across chromosomes associated with increased risk for autism (testing balanced accuracy: 0.6081 and cross-validation consistency: 10/10, P < 0.001). Considering our Argentinean ASD sample, it can be inferred that GABRB3 would be involved in the etiology of autism through interaction with GABRD. These results support the hypothesis that GABAR subunit genes are involved in autism, most likely via complex gene-gene interactions.
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Affiliation(s)
- Carla V Sesarini
- Instituto de Ciencias Básicas y Medicina Experimental (ICBME), CABA, Argentina
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48
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Wang X, Bey AL, Chung L, Krystal AD, Jiang YH. Therapeutic approaches for shankopathies. Dev Neurobiol 2013; 74:123-35. [PMID: 23536326 DOI: 10.1002/dneu.22084] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/13/2012] [Accepted: 03/21/2013] [Indexed: 12/13/2022]
Abstract
Despite recent advances in understanding the molecular mechanisms of autism spectrum disorders (ASD), the current treatments for these disorders are mostly focused on behavioral and educational approaches. The considerable clinical and molecular heterogeneity of ASD present a significant challenge to the development of an effective treatment targeting underlying molecular defects. Deficiency of SHANK family genes causing ASD represent an exciting opportunity for developing molecular therapies because of strong genetic evidence for SHANK as causative genes in ASD and the availability of a panel of Shank mutant mouse models. In this article, we review the literature suggesting the potential for developing therapies based on molecular characteristics and discuss several exciting themes that are emerging from studying Shank mutant mice at the molecular level and in terms of synaptic function.
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Affiliation(s)
- Xiaoming Wang
- Department of Pediatrics, Duke University School of Medicine Durham, North Carolina, 27710
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Winham SJ, Biernacka JM. Gene-environment interactions in genome-wide association studies: current approaches and new directions. J Child Psychol Psychiatry 2013; 54:1120-34. [PMID: 23808649 PMCID: PMC3829379 DOI: 10.1111/jcpp.12114] [Citation(s) in RCA: 46] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Accepted: 05/03/2013] [Indexed: 01/20/2023]
Abstract
BACKGROUND Complex psychiatric traits have long been thought to be the result of a combination of genetic and environmental factors, and gene-environment interactions are thought to play a crucial role in behavioral phenotypes and the susceptibility and progression of psychiatric disorders. Candidate gene studies to investigate hypothesized gene-environment interactions are now fairly common in human genetic research, and with the shift toward genome-wide association studies, genome-wide gene-environment interaction studies are beginning to emerge. METHODS We summarize the basic ideas behind gene-environment interaction, and provide an overview of possible study designs and traditional analysis methods in the context of genome-wide analysis. We then discuss novel approaches beyond the traditional strategy of analyzing the interaction between the environmental factor and each polymorphism individually. RESULTS Two-step filtering approaches that reduce the number of polymorphisms tested for interactions can substantially increase the power of genome-wide gene-environment studies. New analytical methods including data-mining approaches, and gene-level and pathway-level analyses, also have the capacity to improve our understanding of how complex genetic and environmental factors interact to influence psychologic and psychiatric traits. Such methods, however, have not yet been utilized much in behavioral and mental health research. CONCLUSIONS Although methods to investigate gene-environment interactions are available, there is a need for further development and extension of these methods to identify gene-environment interactions in the context of genome-wide association studies. These novel approaches need to be applied in studies of psychology and psychiatry.
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Affiliation(s)
- Stacey J Winham
- Division of Biomedical Statistics and Informatics, Department of Health Sciences Research, Mayo Clinic, Rochester MN 55905
| | - Joanna M. Biernacka
- Division of Biomedical Statistics and Informatics, Department of Health Sciences Research, Mayo Clinic, Rochester MN 55905,Department of Psychiatry and Psychology, Mayo Clinic, Rochester MN 55905
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Abstract
Autism spectrum disorders (ASDs) are lifelong neurodevelopmental disabilities that affect 1 in 88 children in the USA. Despite the high heritability, the genetic basis for a majority of the ASDs remains elusive. The considerable clinical and genetic heterogeneity pose a significant challenge technically. State-of-the-art high-throughput sequencing (HTS), which makes the analyses of any specific single/multiple genes or whole exomes feasible, has shown a promising perspective in disease gene discovery. To date, numerous genetic studies using HTS have been reported and many rare inherited or de novo mutations have been identified. This review will focus on the progress and prospective of genome studies of ASDs using HTS.
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