Joabe dos Santos Pereira1, Fabrícia Lima Fontes2, Silvia Regina Batistuzzo de Medeiros2, Roseana de Almeida Freitas3, Lélia Batista de Souza3, Márcia Cristina da Costa Miguel4. 1. Departament of Pathology, Federal University of Rio Grande do Norte, Natal, Rio Grande do Norte, Brazil. 2. Department of Cellular Biology and Genetics, Federal University of Rio Grande do Norte, Natal, Rio Grande do Norte, Brazil. 3. Post-Graduation Program of Oral Pathology, Departament of Dentistry, Federal University of Rio Grande do Norte, Natal, Rio Grande do Norte, Brazil. 4. Post-Graduation Program of Oral Pathology, Departament of Dentistry, Federal University of Rio Grande do Norte, Natal, Rio Grande do Norte, Brazil. Electronic address: mccmiguel@hotmail.com.
Abstract
OBJECTIVE: to evaluate the association between XPD and XRCC3 polymorphisms and oral squamous cell carcinoma (OSCC). DESIGN: the sample consisted of 54 cases of OSCC and 40 cases of inflammatory fibrous hyperplasia (IFH). Genotypes were determined by the polymerase chain reaction-restriction fragment length polymorphism (PCR-RFLP) method. RESULTS: XPD-Lys/Gln was more common in IFH (n=28; 70%) than in OSCC (n=24; 44.4%) (OR: 0.3; p<0.05). XPD-Gln was more frequent in high-grade lesions (0.48) than in low-grade lesions (0.21) (OR: 3.4; p<0.05). The Gln/Gln genotype was associated with III and IV clinical stages (OR: 0.07; p<0.05). XRCC3-Met was more frequent in OSCC (0.49) than in IFH (0.35) (OR: 2.6; p<0.05). The Met/Met genotype was associated with the presence of metastases (OR: 8.1; p<0.05) and with III and IV clinical stages (OR: 0.07; p<0.05). CONCLUSIONS: in this sample, the frequency of XPD-Gln in IFH suggests that this variant may protect against OSCC. The presence of the XRCC3-Met allele seems to contribute to the development of OSCC, metastases and more advanced stages in these lesions.
OBJECTIVE: to evaluate the association between XPD and XRCC3 polymorphisms and oral squamous cell carcinoma (OSCC). DESIGN: the sample consisted of 54 cases of OSCC and 40 cases of inflammatory fibrous hyperplasia (IFH). Genotypes were determined by the polymerase chain reaction-restriction fragment length polymorphism (PCR-RFLP) method. RESULTS:XPD-Lys/Gln was more common in IFH (n=28; 70%) than in OSCC (n=24; 44.4%) (OR: 0.3; p<0.05). XPD-Gln was more frequent in high-grade lesions (0.48) than in low-grade lesions (0.21) (OR: 3.4; p<0.05). The Gln/Gln genotype was associated with III and IV clinical stages (OR: 0.07; p<0.05). XRCC3-Met was more frequent in OSCC (0.49) than in IFH (0.35) (OR: 2.6; p<0.05). The Met/Met genotype was associated with the presence of metastases (OR: 8.1; p<0.05) and with III and IV clinical stages (OR: 0.07; p<0.05). CONCLUSIONS: in this sample, the frequency of XPD-Gln in IFH suggests that this variant may protect against OSCC. The presence of the XRCC3-Met allele seems to contribute to the development of OSCC, metastases and more advanced stages in these lesions.