Percorrer por autor "Rasga, C."
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- Adapting the early life exposure assessment tool (ELEAT) to Portugal: a pilot study to tackle gene-environment interactions in autism spectrum disorderPublication . Rasga, C.; Santos, J.; Lopes, A.L.; Marques, A.R.; Vilela, J.; Asif, M.; Walker, C.K.; Schmidt, R.J.; Vicente, A.M.The objective was to pilot a Portuguese version of the Early Life Exposure Assessment Tool (ELEAT) for the assessment of the role of environmental exposures in a population of Portuguese children with ASD.
- An integrative system biology approach for dissecting Autism Spectrum DisorderPublication . Asif, M.; Rasga, C.; Martiniano, H.; Santos, J.X.; Marques, A.R.; Couto, F.M .; Vicente, A.M.Autism Spectrum Disorder (ASD) is characterized by a wide spectrum of behavioral presentation. Many genetic factors are implicated in ASD, however their role in the heterogeneous ASD phenotype remains elusive. Using data mining-based integrative approaches, we seek to identify patterns of association between ASD phenotypic subgroups and altered biological processes inferred from CNVs targeting brain genes.
- ASD prevalence study across Europe: developing a school-based screening approach in the ASDEU projectPublication . García Primo, P.; Schendel, D.; Partner, E.; Rasga, C.; Café, C.; Rogé, B.; Arnaud, C.; Saemundsen, E.; Muratori, F.; Narzisi, A.; Boilson, A.; Oliveira, G.; Fuentes, J.; Poustka, L.; Scattonni, M.L.; Gissler, M.; Sweeny, M.R.; Budisteanu, M.; Kawa, R.; Canal-Bedia, R.; Stefanov, R.; Van Bakel, M.E.; Vicente, A.M.; Posada, M.Objectives: The main objective of the present work is to describe the strategy of the Autism Spectrum Disorder in the European Union (ASDEU) project to estimate the prevalence of ASD in school-aged children (7-9 years) across Europe. The focus of the presentation is on the novel field study strategy and aims to be a reflection on what we have learned regarding standardization of study methods across sites, what has worked well and what could be done differently in the future.
- Autism Spectrum Disorder: gene variants involved in the nonsense-mediated mRNA decay pathwayPublication . Marques, Ana Rita; Martiniano, H.; Santos, J.X.; Vilela, J.; Rasga, C.; Oliveira, G.; Romão, L.; Vicente, A.M.No abstract available
- Autism Spectrum Disorder: gene variants involved in the nonsense-mediated mRNA decay pathwayPublication . Marques, Ana Rita; Martiniano, Hugo; Santos, J.X.; Vilela, Joana; Asif, M.; Rasga, C.; Oliveira, G.; Romão, Luísa; Vicente, AstridGenetic factors account for 50-80% of the familial risk of Autism Spectrum Disorder (ASD), but most of the genetic determinants are still unknown and a role for other regulatory mechanisms is likely. The nonsense-mediated decay (NMD) pathway is essential to control mRNA quality and has an important role in the regulation of the transcriptome. Mutations in genes involved in the NMD pathway, such as the UPF3B gene, a core component of this pathway, were previously linked to ASD. In this study we explored the potential role of NMD factors in ASD. We generated a list of 153 genes involved in the NMD pathway using AmiGO, Reactome and a systematic literature review. To identify potentially pathogenic variants in the NMD genes, we analyzed whole exome sequencing data (WES) data from 1338 ASD subjects. We also searched for Copy Number Variants (CNVs) targeting NMD genes in ASD patients (n=3570) and checked their frequency in controls (n=9649). We identified 43 high impact variants in 28 NMD genes, including the UPF3B and ACE, two genes previously implicated in ASD. Importantly, 11 were novel candidate genes that carry loss-of-function and missense (deleterious and damaging) variants with a frequency of 1 to 5% in this ASD dataset. Additionally, 5 NMD genes were found to be targeted by CNVs in 12 ASD subjects but none of the controls. The discovery of 33 NMD genes that are intriguing candidates for ASD in large patient genomic datasets provides evidence supporting the involvement of the NMD pathway in ASD pathophysiology.
- CNVs targeting genes that regulate exposure to toxicants in Autism Spectrum Disorder (ASD): a role for gene-environment interactionsPublication . Santos, J.X.; Rasga, C.; Asif, M.; Marques, A.R.; Vicente, A.M.Objective: Our overall goal is to identify genes involved in detoxification and regulation of barrier permeability processes that can mediate the effect of exposure to toxicants in individuals with ASD. For this purpose, we screened large ASD and control datasets for CNVs targeting selected detoxification and barrier permeability genes.
- Increased frequency of the autism broader phenotype in mothers transmitting etiological CNVs to sons affected by Autism Spectrum Disorder (ASD)Publication . Asif, M.; Conceição, I.C.; Kwiatkowska, K.; Rasga, C.; Café, Cátia; Sousa, L.; Oliveira, G.; Couto, M.F.; Vicente, A.M.Introduction: Autism Spectrum Disorder (ASD) is a frequent and complex neurodevelopmental disorder, characterized by impairments in social communication and repetitive behaviors and with a high male to female ratio: ~4:1. Genetic factors, including rare Copy Number Variants (CNVs), have a substantial impact in ASD risk 1, and are associated with specific phenotypic manifestations 2. Recent studies reported that rare inherited CNVs are enriched in mothers of ASD children compared with mothers of controls and are preferentially transmitted from mothers to ASD children suggesting a sex bias in CNV transmission; further, the imbalanced transmission of small pathogenic CNVs from unaffected mothers to their sons with ASD has been described 3, 4. An increased prevalence of autism - like personality traits is found in unaffected relatives of ASD children, suggesting a genetic liability of a broader autism phenotype (BAP) 5. The BAP in parents of autistic children can be assessed by the Social Responsiveness Scale (SRS) 6 and Broad Autism Phenotype Questionnaire (BAPQ) 7 reports . The SRS is 65 - item questionnaire to identify sub - clinical social impairments and interpersonal behaviour in individuals . The BAPQ is a 36 - item questionnaire measures social aloofness, rigid personality, and pragmatic language deficits in both parents and children.
- A role for gene-environment interactions in Autism Spectrum Disorder is suggested by an excess of potentially pathogenic variants in genes regulating exposure to toxicantsPublication . Santos, J.X.; Marques, A.R.; Rasga, C.; Asif, M.; Vilela, J.; Martiniano, H.; Oliveira, G.; Nunes, A.; Vicente, A.M.Objective: Identify potentially pathogenic CNVs and SNVs targeting genes involved in regulation of toxins exposure, namely in detoxification processes and physiological permeability barriers (blood-brain barrier and placenta), in individuals with ASD.