We examined whether two functional polymorphisms (rs1805476 and rs1805502) in the 3′UTR of the NMDA receptor 2B subunit gene (GRIN2B) were associated with TS in Chinese Han trios.
The genotype data of 261 TS nuclear families were analyzed by Haplotype relative risk (HRR), transmission disequilibrium test (TDT) and Haplotype-based haplotype relative risk (HHRR).
We found an over-transmission of the A allele in rs1805476 and the T allele in rs1805502 from parents to their affected children.