Abstract
Recent molecular studies on autism and related disorders have supported a multilocus etiology for the disease spectrum. To maximize genetic and cultural homogeneity, we have focused our molecular studies to families originating from a subisolate of Central Finland. Genealogical studies enabled the identification of a megapedigree comprising of 12 core families with autism and Asperger syndrome (AS). We analyzed two chromosomal regions on Iq and 3q showing highest lod scores in our genome-wide scan, as well as the AUTS1 locus on chromosome 7q. For markers on 3q25–27, more significant association was observed in families from subisolate compared to families from the rest of Finland. In contrast, no clear evidence for association on AUTS1 locus was obtained. The wide interval showing association, in particular, on chromosome 3q suggests a locus for autism spectrum of disorders on this chromosomal region.
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Acknowledgements
We thank the families for the participation in this study and the child neurologists who referred patients and provided information. Drs Kenneth Lange and Janet Sinsheimer are thanked for their valuable advice concerning the data analysis. Financial support of the Academy of Finland, The Rinnekoti Research Foundation, The Pediatric Research Foundation (Ulla Hjelt Fond), Maud Kuistila Foundation and the Finnish Medical Association is acknowledged. KA is supported by the Cure Autism Now Foundation. These study protocols have been approved by the Ethical Committees of the Hospital for Children and Adolescents of Helsinki University Hospital and National Public Health Institute, Helsinki. Informed consent for genetic studies was obtained from the subjects and/or their parents.
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Auranen, M., Varilo, T., Alen, R. et al. Evidence for allelic association on chromosome 3q25–27 in families with autism spectrum disorders originating from a subisolate of Finland. Mol Psychiatry 8, 879–884 (2003). https://doi.org/10.1038/sj.mp.4001299
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DOI: https://doi.org/10.1038/sj.mp.4001299
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