Abstract
In the current study we explored the hypothesis that rare variants in SLC6A4 contribute to autism susceptibility and to rigid-compulsive behaviors in autism. We made use of a large number of unrelated cases with autism spectrum disorders (approximately 350) and controls (approximately 420) and screened for rare exonic variants in SLC6A4 by a high-throughput method followed by sequencing. We observed no difference in the frequency of such variants in the two groups, irrespective of how we defined the rare variants. Furthermore, we did not observe an association of rare coding variants in SLC6A4 with rigid-compulsive traits scores in the cases. These results do not support a significant role for rare coding variants in SLC6A4 in autism spectrum disorders, nor do they support a significant role for SLC6A4 in rigid-compulsive traits in these disorders.
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