rs2043211 polymorphism in CARD8 is not associated with Tourette syndrome in a family-based association study in the Chinese Han population.
BACKGROUND
Previous studies showed that postinfectious autoimmunity and immune deficiency played an important role in the pathogenesis of Tourette syndrome. CARD8 can suppress activity of NF-ΚB activated by inflammatory mediators.


OBJECTIVE
To study the association between the rs2043211 polymorphism in CARD8 and susceptibility to Tourette syndrome in Chinese Han population.


METHODS
We recruited 279 patients diagnosed with Tourette syndrome and their parents for the study. Genotyping for CARD8 rs2043211 single-nucleotide polymorphism was performed using predesigned TaqMan single-nucleotide polymorphism genotyping assay. The genetic contribution of this single-nucleotide polymorphism was evaluated using transmission disequilibrium test and haplotype relative risk and the haplotype-based haplotype relative risk.


RESULTS
The results of the allelic and genotypic distribution of rs2043211 polymorphism in CARD8 showed that both the Tourette syndrome patients group and the parents group are in Hardy-Weinberg equilibrium. No significant differences were observed in the mutant allele transmission (transmission disequilibrium test = 1.107, df = 1, p = 0.322). Results of haplotype relative risk analysis showed that no statistical significant difference was found in the genotypic frequency (AA/AT/TT) of Tourette syndrome patients passed from parents (haplotype relative risk = 1.152, χ(2 )= 0.494, p = 0.482, 95% CI = 0.777-1.708). Similarly, the analysis of haplotype-based haplotype relative risk was also not to support a statistically significant association in allelic frequency (A/T) of Tourette syndrome patients passed from parents (haplotype-based haplotype relative risk = 1.130, χ(2 )= 1.037, p = 0.308, 95% CI = 0.893-1.429).


CONCLUSIONS
Our results suggest CARD8 might not play a role in the pathogenesis of Tourette syndrome in Chinese Han population. However, the results still need to be tested in a larger sample and different populations.
Child Healthcare Department, The Affiliated Hospital of Qingdao University, Qingdao, China.
Mingji
M
Yi
Child Healthcare Department, The Affiliated Hospital of Qingdao University, Qingdao, China.
Xiaohui
X
Shao
Centre of Reproductive Medicine, The Affiliated Hospital of Qingdao University, Qingdao, China.
Jianhua
J
Ma
Department of Psychiatry, Qingdao Mental Health Center, Qingdao, China.
Bo
B
Tian
Child Healthcare Department, The Affiliated Hospital of Qingdao University, Qingdao, China.
Ying
Y
Zhang
Prenatal Diagnosis Centre, The Affiliated Hospital of Qingdao University, Qingdao, China qdmc_genetics@163.com.
Shiguo
S
Liu
D000293:Adolescent; D000328:Adult; D053468:CARD Signaling Adaptor Proteins / Q000235:genetics*; D002648:Child; D002681:China; D005190:Family; D005260:Female; D005787:Gene Frequency; D056726:Genetic Association Studies; D006801:Humans; D008297:Male; D009363:Neoplasm Proteins / Q000235:genetics*; D020641:Polymorphism, Single Nucleotide; D005879:Tourette Syndrome / Q000235:genetics*
D053468:CARD Signaling Adaptor Proteins; C455623:CARD8 protein, human; D009363:Neoplasm Proteins
CARD8; Tourette syndrome; family-based association; polymorphism