1. Investigation of gene–environment interactions in relation to tic severity.
- Author
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Abdulkadir, Mohamed, Yu, Dongmei, Osiecki, Lisa, King, Robert A., Fernandez, Thomas V., Brown, Lawrence W., Cheon, Keun-Ah, Coffey, Barbara J., Garcia-Delgar, Blanca, Gilbert, Donald L., Grice, Dorothy E., Hagstrøm, Julie, Hedderly, Tammy, Heyman, Isobel, Hong, Hyun Ju, Huyser, Chaim, Ibanez-Gomez, Laura, Kim, Young Key, Kim, Young-Shin, and Koh, Yun-Joo
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GENOTYPE-environment interaction , *GENOME-wide association studies , *AUTISM spectrum disorders , *TOURETTE syndrome , *SINGLE nucleotide polymorphisms , *LOCUS (Genetics) - Abstract
Tourette syndrome (TS) is a neuropsychiatric disorder with involvement of genetic and environmental factors. We investigated genetic loci previously implicated in Tourette syndrome and associated disorders in interaction with pre- and perinatal adversity in relation to tic severity using a case-only (N = 518) design. We assessed 98 single-nucleotide polymorphisms (SNPs) selected from (I) top SNPs from genome-wide association studies (GWASs) of TS; (II) top SNPs from GWASs of obsessive–compulsive disorder (OCD), attention-deficit/hyperactivity disorder (ADHD), and autism spectrum disorder (ASD); (III) SNPs previously implicated in candidate-gene studies of TS; (IV) SNPs previously implicated in OCD or ASD; and (V) tagging SNPs in neurotransmitter-related candidate genes. Linear regression models were used to examine the main effects of the SNPs on tic severity, and the interaction effect of these SNPs with a cumulative pre- and perinatal adversity score. Replication was sought for SNPs that met the threshold of significance (after correcting for multiple testing) in a replication sample (N = 678). One SNP (rs7123010), previously implicated in a TS meta-analysis, was significantly related to higher tic severity. We found a gene–environment interaction for rs6539267, another top TS GWAS SNP. These findings were not independently replicated. Our study highlights the future potential of TS GWAS top hits in gene–environment studies. [ABSTRACT FROM AUTHOR]
- Published
- 2021
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