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Osteoarthritis (OA) is the most prevalent form of arthritis in the elderly. This disease is characterized by breakdown and loss of articular cartilage due to genetic, mechanical and environmental factors. Although the pathophysiology of OA is not completely known, several candidate genes have been reported to be associated with OA susceptibility. We assessed the association between genetic variation in the ADAMTS14 region and knee osteoarthritis susceptibility in the Thai population. The rs4747096 SNP was genotyped by PCR-RFLP on genomic DNA extracted from peripheral blood of 108 OA patients and 119 controls. The PCR product (196 bp) was digested with BspEI. A sample with the GG genotype showed two band sizes of 158 and 38 bp, while a sample with the AA genotype showed a single band size of 196 bp. Heterozygotes with the AG genotype showed all three corresponding bands. Genotype distributions, allele frequencies and model of inheritance in patients and controls were compared. In females, the frequency of the AA genotype and the A allele were significantly higher in knee OA patients than in controls [odds ratio (OR) = 2.79, 95% confidence interval (CI) = 1.05-7.59 and OR = 1.58, 95%CI = 1.00-2.45, respectively]. Moreover, genotypic AA and AG were associated with significantly increased risk for knee OA when compared to GG (OR = 2.72, 95%CI = 1.10-6.87). No significant associations were observed in males. In conclusion, the nsSNP rs4747096 in ADAMTS14 was associated with knee OA in female Thai patients; therefore, the role of ADAMTS14 in OA seems to be gender-dependent.

ADAMTS14 gene polymorphism associated with knee osteoarthritis in Thai women