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Developmental Neuropsychology Volume 42, 2017 - Issue 7-8
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Review

Genetic and environmental risk factors for developmental dyslexia in children: systematic review of the last decade

Natalia BeckerCognitive Neuropsychology Research Center (Neurocog), Department of Developmental and Personality Psychology, Post-Graduation Program in Psychology, Institute of Psychology, Universidade Federal do Rio Grande do Sul (UFRGS), Porto Alegre, Rio Grande do Sul, BrazilCorrespondence[email protected]
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Mailton VasconcelosExperimental Psychology, Neuroscience and Behavior Lab, Department of Developmental and Personality Psychology, Post-Graduation Program in Psychology, Institute of Psychology, Universidade Federal do Rio Grande do Sul (UFRGS), Porto Alegre, Rio Grande do Sul, BrazilView further author information
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Vanessa OliveiraExperimental Psychology, Neuroscience and Behavior Lab, Department of Developmental and Personality Psychology, Post-Graduation Program in Psychology, Institute of Psychology, Universidade Federal do Rio Grande do Sul (UFRGS), Porto Alegre, Rio Grande do Sul, BrazilView further author information
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Fernanda Caroline Dos SantosDepartamento de Biologia Geral, Post-Graduation Program in Genetics, Instituto de Ciências Biológicas, Universidade Federal de Minas Gerais (UFMG), Pampulha, Belo Horizonte, Minas Gerais, BrazilView further author information
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Lisiane BizarroExperimental Psychology, Neuroscience and Behavior Lab, Department of Developmental and Personality Psychology, Post-Graduation Program in Psychology, Institute of Psychology, Universidade Federal do Rio Grande do Sul (UFRGS), Porto Alegre, Rio Grande do Sul, BrazilView further author information
,
Rosa M.M. De AlmeidaExperimental Psychology, Neuroscience and Behavior Lab, Department of Developmental and Personality Psychology, Post-Graduation Program in Psychology, Institute of Psychology, Universidade Federal do Rio Grande do Sul (UFRGS), Porto Alegre, Rio Grande do Sul, BrazilView further author information
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Jerusa Fumagalli De SallesCognitive Neuropsychology Research Center (Neurocog), Department of Developmental and Personality Psychology, Post-Graduation Program in Psychology, Institute of Psychology, Universidade Federal do Rio Grande do Sul (UFRGS), Porto Alegre, Rio Grande do Sul, BrazilView further author information
&
Maria Raquel Santos CarvalhoDepartamento de Biologia Geral, Post-Graduation Program in Genetics, Instituto de Ciências Biológicas, Universidade Federal de Minas Gerais (UFMG), Pampulha, Belo Horizonte, Minas Gerais, BrazilView further author information
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Pages 423-445 | Published online: 25 Oct 2017
 
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ABSTRACT

Despite advances in the characterization of developmental dyslexia (DD), several questions regarding the interplay between DD-susceptibility genes and environmental risk factors remain open. This systematic review aimed at answering the following questions: What has been the impact of new resources on the knowledge about DD? Which questions remain open? What is the investigative agenda for the short term? Forty-six studies were analyzed. Despite the growing literature on DD candidate genes, most studies have not been replicated. We found large effects on causative genes and smaller environmental contributions, involving maternal smoking during pregnancy, SES and the DYX1C1-1259C/G marker. Implications are discussed.

Acknowledgements

We want to thank Dr. Claudio S. Hutz for initial support and guidance on this work. We also would like to thank Dr. Anselmo J. Kamada for insightful contributions on data analysis and methodological tips.

Funding

This work was supported by Brazilian National Counsel of Technological and Scientific Development (CNPq-Brazil) and Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES-Brazil). The Brazilian National Counsel of Technological and Scientific Development (CNPq) funded the PhD scholarship to the first author and the senior researcher scholarships to the last four authors. The second, third and fouth authors receive a PhD scholarship from the Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES-Brazil).

Additional information

Funding

This work was supported by Brazilian National Counsel of Technological and Scientific Development (CNPq-Brazil) and Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES-Brazil). The Brazilian National Counsel of Technological and Scientific Development (CNPq) funded the PhD scholarship to the first author and the senior researcher scholarships to the last four authors. The second, third and fouth authors receive a PhD scholarship from the Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES-Brazil).

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