[Association study of HTR1A and HTR1B with adolescent idiopathic scoliosis]

To assess whether HTR1A and HTR1B polymorphisms are associated with the predisposition, gender, PUMC Classification and/or severity of adolescent idiopathic scoliosis (AIS).

Rs6294 (HTR1A) and rs6296 (HTR1B) were genotyped in 103 AIS patients treated from January 2006 to March 2007, and 108 controls with matched gender and age. The data were analyzed by the allelic and genotypic association analysis, and the genotype-phenotype (gender, PUMC Classification, and Cobb angle) association analysis.

The distributions of the alleles of all the 2 SNPs met Hardy-Weinberg equilibrium in the controls (goodness-of-fit chi(2) test, P > 0.05). The allele A of rs6294 was related with the occurrence of AIS (P = 0.041), but differences of the allele frequencies of rs6296 and the genotype frequencies of both SNPs between 2 groups had no statistical significance (P > 0.05). The genotype A/A + A/G of rs6294 was associated with AIS PUMC type III, and there was no other positive results in genotype-phenotype association analysis.

These results suggest that HTR1A may be a predisposition gene of AIS PUMC type III, and PUMC Classification may has its genetic basis.