Browsing by Author "Vicente, A.M."
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- A 3.2 Mb deletion on 18q12 in a patient with childhood autism and high-grade myopiaPublication . Gilling, M.; Lauritsen, M.B.; Møller, M.; Henriksen, K.F.; Vicente, A.M.; Oliveira, G.; Cintin, C.; Eiberg, H.; Andersen, P.S.; Mors, O.; Rosenberg, T.; Brøndum-Nielsen, K.; Cotterill, R.M.; Lundsteen, C.; Ropers, H.H.; Ullmann, R.; Bache, I.; Tümer, Z.; Tommerup, N.Autism spectrum disorders (ASDs) are a heterogeneous group of disorders with unknown aetiology. Even though ASDs are suggested to be among the most heritable complex disorders, only a few reproducible mutations leading to susceptibility for ASD have been identified. In an attempt to identify ASD susceptibility genes through chromosome rearrangements, we investigated a female patient with childhood autism and high-grade myopia, and an apparently balanced de novo translocation, t(5;18)(q34;q12.2). Further analyses revealed a 3.2 Mb deletion encompassing 17 genes at the 18q break point and an additional deletion of 1.27 Mb containing two genes on chromosome 4q35. Q-PCR analysis of 14 of the 17 genes deleted on chromosome 18 showed that 11 of these genes were expressed in the brain, suggesting that haploinsufficiency of one or more genes may have contributed to the childhood autism phenotype of the patient. Identification of multiple genetic changes in this patient with childhood autism agrees with the most frequently suggested genetic model of ASDs as complex, polygenic disorders.
- 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.
- Análise de custo-benefício da farmacogenética na terapêutica com varfarinaPublication . Raimundo, Ana; Picanço, Isabel; Silva, Marta Barreto da; Vicente, A.M.
- Analysis of the neuroligin 3 and 4 genes in autism and other neuropsychiatric patientsPublication . Yan, J.; Oliveira, G.; Coutinho, A.; Yang, C.; Feng, J.; Katz, C.; Sram, J.; Bockholt, A.; Jones, I.R.; Craddock, N.; Cook Jr, E.H.; Vicente, A.M.; Sommer, S.S.
- 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.
- Association of a genetic variant in the ALOX5AP with higher risk of ischemic stroke: a case-control, meta-analysis and functional studyPublication . Domingues-Montanari, S.; Fernández-Cadenas, I.; Del Rio-Espinola, A.; Corbeto, N.; Krug, T.; Manso, H.; Gouveia, L.; Sobral, J.; Mendioroz, M.; Fernández-Morales, J.; Alvarez-Sabin, J.; Ribó, M.; Rubiera, M.; Obach, V.; Martí-Fàbregas, J.; Freijo, M.; Serena, J.; Ferro, J.M.; Vicente, A.M.; Oliveira, S.A.; Montaner, J.Variants in the 5-lipoxygenase-activating protein (ALOX5AP) and phosphodiesterase 4D (PDE4D) genes have first been associated with ischemic stroke (IS) through whole-genome linkage screens. However, association studies obtained conflicting results. We aimed to investigate the contribution of selected single nucleotide polymorphisms (SNPs) in these genes for the first time in a large Iberian population.
- Association of the alpha4 integrin subunit gene (ITGA4) with autismPublication . Correia, C.; Coutinho, A.M.; Almeida, J.; Lontro, R.; Lobo, C.; Miguel, T.S.; Martins, M.; Gallagher, L.; Conroy, J.; Gill, M.; Oliveira, G.; Vicente, A.M.In the present work, we provide further evidence for the involvement of the integrin alpha-4 precursor gene (ITGA4) in the etiology of autism, by replicating previous findings of a genetic association with autism in various independent populations. The ITGA4 gene maps to the autism linkage region on 2q31-33 and is therefore a plausible positional candidate. We tested eight single nucleotide polymorphisms (SNPs) in the ITGA4 gene region for association with autism in a sample of 164 nuclear families. Evidence for association was found for the rs155100 marker (P = 0.019) and for a number of specific marker haplotypes containing this SNP (0.00053 < P < 0.022). alpha4 integrins are known to play a key role in neuroinflammatory processes, which are hypothesized to contribute to autism. In this study, an association was found between the ITGA4 rs1449263 marker and levels of a serum autoantibody directed to brain tissue, which was previously shown to be significantly more frequent in autistic patients than in age-matched controls in our population. This result suggests that the ITGA4 gene could be involved in a neuroimmune process thought to occur in autistic patients and, together with previous findings, offers a new perspective on the role of integrins in the etiology of autism to which little attention has been paid so far.
- Attitudes of the autism community to early autism researchPublication . Fletcher-Watson, S.; Apicella, F.; Auyeung, B.; Beranova, S.; Bonnet-Brilhault, F.; Canal-Bedia, R.; Charman, T.; Chericoni, N.; Conceição, I.C.; Davies, K.; Farroni, T.; Gomot, M.; Jones, E; Kaale, A.; Kapica, K.; Kawa, R.; Kylliäinen, A.; Larsen, K.; Lefort-Besnard, J.; Malvy, J.; Manso de Dios, S.; Markovska-Simoska, S.; Millo, I.; Miranda, N.; Pasco, G.; Pisula, E.; Raleva, M.; Rogé, B.; Salomone, E.; Schjolberg, S.; Tomalski, P.; Vicente, A.M.; Yirmiya, N.Investigation into the earliest signs of autism in infants has become a significant sub-field of autism research. This work invokes specific ethical concerns such as use of 'at-risk' language, communicating study findings to parents and the future perspective of enrolled infants when they reach adulthood. This study aimed to ground this research field in an understanding of the perspectives of members of the autism community. Following focus groups to identify topics, an online survey was distributed to autistic adults, parents of children with autism and practitioners in health and education settings across 11 European countries. Survey respondents (n = 2317) were positively disposed towards early autism research, and there was significant overlap in their priorities for the field and preferred language to describe infant research participants. However, there were also differences including overall less favourable endorsement of early autism research by autistic adults relative to other groups and a dislike of the phrase 'at-risk' to describe infant participants, in all groups except healthcare practitioners. The findings overall indicate that the autism community in Europe is supportive of early autism research. Researchers should endeavour to maintain this by continuing to take community perspectives into account.
- 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