scholarly journals Progress Towards Simple and Direct Detection of Adenylosuccinate Lyase Deficiency in Human Urine

2011 ◽  
Vol 64 (11) ◽  
pp. 1470 ◽  
Author(s):  
Soojin Lim ◽  
Mark Lowry ◽  
Robert M. Strongin
Keyword(s):  
Autism Spectrum Disorders ◽  
Human Urine ◽  
Boronic Acid ◽  
De Novo ◽  
Direct Detection ◽  
Autism Spectrum ◽  
Purine Synthesis ◽  
Adenylosuccinate Lyase ◽  
Adenylosuccinate Lyase Deficiency ◽  
Spectrum Disorders

A rhodamine based boronic acid linearly responds to increasing 5-aminoimidazole-4-carboxamide riboside (AICAr) concentrations in human urine. This method is thus an advance in detecting adenylosuccinate lyase (ADSL) deficiency as AICAr is a model riboside for the ADSL substrates succinyladenosine (S-Ado) and succinylaminoimidazolecarboxamide riboside (SAICAr). ADSL deficiency is a rare but devastating disease of de novo purine synthesis in infants. Its diagnosis is also significant as it is one of the autism spectrum disorders.

scholarly journals CACNA1D De Novo Mutations in Autism Spectrum Disorders Activate Cav1.3 L-Type Calcium Channels

2015 ◽  
Vol 77 (9) ◽  
pp. 816-822 ◽  
Author(s):  
Alexandra Pinggera ◽  
Andreas Lieb ◽  
Bruno Benedetti ◽  
Michaela Lampert ◽  
Stefania Monteleone ◽  
...  
Keyword(s):  
Autism Spectrum Disorders ◽  
Calcium Channels ◽  
De Novo ◽  
Autism Spectrum ◽  
De Novo Mutations ◽  
Spectrum Disorders

scholarly journals Patterns and rates of exonic de novo mutations in autism spectrum disorders

Nature ◽  
2012 ◽  
Vol 485 (7397) ◽  
pp. 242-245 ◽  
Author(s):  
Benjamin M. Neale ◽  
Yan Kou ◽  
Li Liu ◽  
Avi Ma’ayan ◽  
Kaitlin E. Samocha ◽  
...  
Keyword(s):  
Autism Spectrum Disorders ◽  
De Novo ◽  
Autism Spectrum ◽  
De Novo Mutations ◽  
Spectrum Disorders

scholarly journals High-throughput sequencing of autism spectrum disorders comes of age

2013 ◽  
Vol 95 (4) ◽  
pp. 121-129 ◽  
Author(s):  
MINGBANG WANG ◽  
XIAOMEI FAN ◽  
TAO WANG ◽  
JINYU WU
Keyword(s):  
Autism Spectrum Disorders ◽  
High Throughput ◽  
High Throughput Sequencing ◽  
De Novo ◽  
Autism Spectrum ◽  
Disease Gene Discovery ◽  
The Usa ◽  
High Heritability ◽  
Spectrum Disorders ◽  
Promising Perspective

SummaryAutism 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.

scholarly journals Schizophrenia, autism spectrum disorders and developmental disorders share specific disruptive coding mutations

2021 ◽  
Vol 12 (1) ◽  
Author(s):  
Elliott Rees ◽  
Hugo D. J. Creeth ◽  
Hai-Gwo Hwu ◽  
Wei J. Chen ◽  
Ming Tsuang ◽  
...  
Keyword(s):  
Autism Spectrum Disorders ◽  
Neurodevelopmental Disorders ◽  
Developmental Disorders ◽  
De Novo ◽  
Neurodevelopmental Disorder ◽  
Autism Spectrum ◽  
Increase Risk ◽  
Spectrum Disorders ◽  
Using Data ◽  
Shared Risk

AbstractPeople with schizophrenia are enriched for rare coding variants in genes associated with neurodevelopmental disorders, particularly autism spectrum disorders and intellectual disability. However, it is unclear if the same changes to gene function that increase risk to neurodevelopmental disorders also do so for schizophrenia. Using data from 3444 schizophrenia trios and 37,488 neurodevelopmental disorder trios, we show that within shared risk genes, de novo variants in schizophrenia and neurodevelopmental disorders are generally of the same functional category, and that specific de novo variants observed in neurodevelopmental disorders are enriched in schizophrenia (P = 5.0 × 10−6). The latter includes variants known to be pathogenic for syndromic disorders, suggesting that schizophrenia be included as a characteristic of those syndromes. Our findings imply that, in part, neurodevelopmental disorders and schizophrenia have shared molecular aetiology, and therefore likely overlapping pathophysiology, and support the hypothesis that at least some forms of schizophrenia lie on a continuum of neurodevelopmental disorders.

scholarly journals Schizophrenia, autism spectrum disorders and developmental disorders share specific disruptive coding mutations

2020 ◽  
Author(s):  
Elliott Rees ◽  
Hugo Creeth ◽  
Hai-Gwo Hwu ◽  
Wei Chen ◽  
Ming Tsuang ◽  
...  
Keyword(s):  
Autism Spectrum Disorders ◽  
Intellectual Disability ◽  
Neurodevelopmental Disorders ◽  
Developmental Disorders ◽  
De Novo ◽  
Autism Spectrum ◽  
Risk Genes ◽  
Spectrum Disorders ◽  
Coding Variants ◽  
Shared Risk

Abstract Genes enriched for rare disruptive coding variants in schizophrenia overlap those in which disruptive mutations are associated with neurodevelopmental disorders (NDDs), particularly autism spectrum disorders and intellectual disability. However, it is unclear whether this implicates the same specific variants, or even variants with the same functional effects on shared risk genes. Here, we show that de novo mutations in schizophrenia are generally of the same functional category as those that confer risk for NDDs, and that the specific de novo mutations in NDDs are enriched in schizophrenia. These findings indicate that, in part, NDDs and schizophrenia have shared molecular aetiology, and therefore likely overlapping pathophysiology. We also observe pleiotropic effects for variants known to be pathogenic for several syndromic developmental disorders, suggesting that schizophrenia should be included among the phenotypes associated with these mutations. Collectively, our findings support the hypothesis that at least some forms of schizophrenia lie within a continuum of neurodevelopmental disorders.

scholarly journals Drosophila functional screening of de novo variants in autism uncovers deleterious variants and facilitates discovery of rare neurodevelopmental diseases

2021 ◽  
Author(s):  
Paul C Marcogliese ◽  
Samantha L Deal ◽  
Jonathan Andrews ◽  
J Michael Harnish ◽  
V Hemanjani Bhavana ◽  
...  
Keyword(s):  
Autism Spectrum Disorders ◽  
Candidate Genes ◽  
De Novo ◽  
Functional Characterization ◽  
Gene Discovery ◽  
Autism Spectrum ◽  
Functional Screening ◽  
Simons Simplex Collection ◽  
Spectrum Disorders

Abstract:Individuals with autism spectrum disorders (ASD) exhibit an increased burden of de novo variants in a broadening range of genes. We functionally tested the effects of ASD missense variants using Drosophila through ‘humanization’ rescue and overexpression-based strategies. We studied 79 ASD variants in 74 genes identified in the Simons Simplex Collection and found 38% of them caused functional alterations. Moreover, we identified GLRA2 as the cause of a spectrum of neurodevelopmental phenotypes beyond ASD in eight previously undiagnosed subjects. Functional characterization of variants in ASD candidate genes point to conserved neurobiological mechanisms and facilitates gene discovery for rare neurodevelopmental diseases.

scholarly journals The Autism Birth Cohort (ABC):a study of autism spectrum disorders in MoBa

2014 ◽  
Vol 24 (1-2) ◽  
Author(s):  
Pål Surén ◽  
Synnve Schjølberg ◽  
Anne-Siri Øyen ◽  
Kari Kveim Lie ◽  
Mady Hornig ◽  
...  
Keyword(s):  
Autism Spectrum Disorders ◽  
Birth Cohort ◽  
De Novo ◽  
Inflammatory Responses ◽  
Autism Spectrum ◽  
Deciduous Teeth ◽  
Fetal Life ◽  
Early Screening ◽  
Case Identification ◽  
Spectrum Disorders

<p><em>Background:</em> Autism spectrum disorders (ASDs) are characterized by persistent deficits in social communication and interaction and restricted, repetitive patterns of behavior, interests or activities. In most cases, the cause of ASD is likely to be a combination of genetic predisposition and environmental exposures occurring in fetal life or early infancy. Consequently, a prospective pregnancy cohort like MoBa represents an ideal platform for studies of ASDs in children.</p><p><em>Methods:</em> The Autism Birth Cohort (ABC) Study has identified potential ASD cases in MoBa through questionnaire- based screening, parental and professional referrals, and linkages to the Norwegian Patient Register. ASD diagnoses have been ascertained through in-person clinical assessments and medical record reviews.</p><p><em>Current results</em>: By the end of 2012, the ABC Study had identified 518 ASD cases in MoBa. The ASD prevalence in school-age children is 0.7-0.8%, which is in line with nationwide estimates for Norway. The most important source of ASD case identification was registry linkages, while only a minority was detected through early screening. Published findings show that screening at 18 months misses the majority of ASD cases. Analyses of risk factors for ASDs have shown that maternal use of folic acid supplements in early pregnancy may lower the child’s risk of developing ASDs and that paternal obesity appears to increase the child’s risk of ASDs.</p><p><em>Future plans: </em>ASD case identification will continue through annual registry linkages and subsequent reviews of medical records. Analyses of plasma samples and RNA samples will be conducted to investigate prenatal and perinatal microbial exposures, innate immune and inflammatory responses, biomarkers of autism risk, and exposures to xenobiotics. Analyses of deciduous teeth will also investigate the effect of medications and environmental toxins. Exome sequencing of DNA from ASD cases and their parents is ongoing, and will elucidate the role of <em>de novo</em> DNA mutations in the pathogenesis of ASDs. Future epidemiological analyses will explore the results of the 36-month screening for ASDs, the diagnostic stability and developmental trajectories in ASD children, and psychiatric and medical comorbidities in ASDs.</p>

scholarly journals Schizophrenia, autism spectrum disorders and developmental disorders share specific disruptive coding mutations

2020 ◽  
Author(s):  
Elliott Rees ◽  
Hugo D. J. Creeth ◽  
Hai-Gwo Hwu ◽  
Wei J. Chen ◽  
Ming Tsuang ◽  
...  
Keyword(s):  
Autism Spectrum Disorders ◽  
Intellectual Disability ◽  
Neurodevelopmental Disorders ◽  
Developmental Disorders ◽  
De Novo ◽  
Autism Spectrum ◽  
Risk Genes ◽  
Spectrum Disorders ◽  
Coding Variants ◽  
Shared Risk

AbstractGenes enriched for rare disruptive coding variants in schizophrenia overlap those in which disruptive mutations are associated with neurodevelopmental disorders (NDDs), particularly autism spectrum disorders and intellectual disability. However, it is unclear whether this implicates the same specific variants, or even variants with the same functional effects on shared risk genes. Here, we show that de novo mutations in schizophrenia are generally of the same functional category as those that confer risk for NDDs, and that the specific de novo mutations in NDDs are enriched in schizophrenia. These findings indicate that, in part, NDDs and schizophrenia have shared molecular aetiology, and therefore likely overlapping pathophysiology. We also observe pleiotropic effects for variants known to be pathogenic for several syndromic developmental disorders, suggesting that schizophrenia should be included among the phenotypes associated with these mutations. Collectively, our findings support the hypothesis that at least some forms of schizophrenia lie within a continuum of neurodevelopmental disorders.

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