RT Journal Article T1 Investigation of gene-environment interactions in relation to tic severity. A1 Abdulkadir, Mohamed A1 Yu, Dongmei A1 Osiecki, Lisa A1 King, Robert A A1 Fernandez, Thomas V A1 Brown, Lawrence W A1 Cheon, Keun-Ah A1 Coffey, Barbara J A1 Garcia-Delgar, Blanca A1 Gilbert, Donald L A1 Grice, Dorothy E A1 Hagstrøm, Julie A1 Hedderly, Tammy A1 Heyman, Isobel A1 Hong, Hyun Ju A1 Huyser, Chaim A1 Ibanez-Gomez, Laura A1 Kim, Young Key A1 Kim, Young-Shin A1 Koh, Yun-Joo A1 Kook, Sodahm A1 Kuperman, Samuel A1 Leventhal, Bennett A1 Madruga-Garrido, Marcos A1 Maras, Athanasios A1 Mir, Pablo A1 Morer, Astrid A1 Münchau, Alexander A1 Plessen, Kerstin J A1 Roessner, Veit A1 Shin, Eun-Young A1 Song, Dong-Ho A1 Song, Jungeun A1 Visscher, Frank A1 Zinner, Samuel H A1 Mathews, Carol A A1 Scharf, Jeremiah M A1 Tischfield, Jay A A1 Heiman, Gary A A1 Dietrich, Andrea A1 Hoekstra, Pieter J K1 Gene–environment interaction K1 Pre- and perinatal complications K1 Tic severity K1 Tourette syndrome AB 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. YR 2021 FD 2021-08-13 LK http://hdl.handle.net/10668/18374 UL http://hdl.handle.net/10668/18374 LA en DS RISalud RD Apr 4, 2025