Replication of autism linkage: fine-mapping peak at 17q21.
Autism is a heritable but genetically complex disorder characterized by deficits in language and in reciprocal social interactions, combined with repetitive and stereotypic behaviors. As with many genetically complex disorders, numerous genome scans reveal inconsistent results. A genome scan of 345 families from the Autism Genetic Resource Exchange (AGRE) (AGRE_1), gave the strongest evidence of linkage at 17q11-17q21 in families with no affected females. Here, we report a full-genome scan of an independent sample of 91 AGRE families with 109 affected sibling pairs (AGRE_2) that also shows the strongest evidence of linkage to 17q11-17q21 in families with no affected females. Taken together, these samples provide a replication of linkage to this chromosome region that is, to our knowledge, the first such replication in autism. Fine mapping at 2-centimorgan (cM) intervals in the combined sample of families with no affected females reveals a linkage peak at 66.85 cM, which places this locus at 17q21.
Cantor
Rita M
RM
Department of Human Genetics, David Geffen School of Medicine, University of California at Los Angeles, Los Angeles, CA 90095-7088, USA. rcantor@mednet.ucla.edu
Kono
Naoko
N
Duvall
Jackie A
JA
Alvarez-Retuerto
Ana
A
Stone
Jennifer L
JL
Alarcón
Maricela
M
Nelson
Stanley F
SF
Geschwind
Daniel H
DH
D000483:Alleles; D001321:Autistic Disorder / Q000235:genetics*; D002874:Chromosome Mapping; D002886:Chromosomes, Human, Pair 17; D015331:Cohort Studies; D008040:Genetic Linkage; D005819:Genetic Markers; D015894:Genome, Human; D006801:Humans; D008297:Male; D009679:Nuclear Family; D010375:Pedigree; D035781:Siblings; D012984:Software
D005819:Genetic Markers