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Archives of Clinical Psychiatry (São Paulo)

versão impressa ISSN 0101-6083versão On-line ISSN 1806-938X


PEHLIVAN, Sacide et al. XRCC4 rs6869366 polymorphism is associated with susceptibility to both nicotine dependence and/or schizophrenia. Arch. Clin. Psychiatry (São Paulo) [online]. 2018, vol.45, n.3, pp.53-56. ISSN 1806-938X.


Oxidative stress induced DNA damage has been assumed to contribute to the etiopathogenesis of schizophrenia (Sch). Smoking prevalence was more common in patients with Sch. The X-ray repair cross-complementation group 4 (XRCC4) gene plays an important role in the repair of DNA double-strand breaks.


The purpose of this study was to investigate whether XRCC4 rs6869366 polymorphism has a relationship both in nicotine dependence (ND) and Sch+ND risk.


One hundred and four patients with Sch+ND, 133 subjects with ND only and 70 healthy controls were enrolled in the study. XRCC4 rs6869366 polymorphism was analyzed using PCR-RFLP assay.


The frequency of XRCC4 rs6869366 GG genotype was more common in the ND and Sch+ND group than controls (p = 0.001 and p = 0.001, respectively). XRCC4 rs6869366 TT genotype was lower in both ND and Sch+ND group compared to controls (p = 0.001 and p = 0.001, respectively). Also, XRCC4 rs6869366 G allele was higher in Sch+ND group than controls (p = 0.001) while XRCC4 rs6869366 T allele was lower in ND group than healthy controls (p=0.001). XRCC4 rs6869366 GT genotype was lower in ND group than control group (p = 0.003).


These results suggested that the XRCC4 rs6869366 polymorphism G related genotype/allele was associated with susceptibility to both ND and Sch+ND in a Turkish population.

Palavras-chave : DNA repair; Schizophrenia; nicotine dependence; XRCC4.

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