RESUMO
<p><b>OBJECTIVE</b>To investigate the association of polymorphisms of CDT1 and GMNN gene, two important genes participating in DNA replication, with the risk of sporadic breast cancer.</p><p><b>METHODS</b>Using polymerase chain reaction-restriction fragment length polymorphism (PCR - RFLP) and the primer-introduced restriction analysis (PIRA)-PCR assay to genotype the CDT1 838G/A and GMNN 387C/A polymorphisms in a case-control study of 427 breast cancer cases and 477 cancer-free controls in a Chinese population.</p><p><b>RESULTS</b>No significant association of the CDT1 838G/A and GMNN 387C/A polymorphisms with the risk of breast cancer was found (adjusted OR:1.16, 95% CI:0.88-1.54 for CDT1 GA+AA genotypes and adjusted OR:0.90, 95% CI:0.67-1.21 for GMNN CA+AA genotypes). However, in the stratified analyses, a significant association of CDT1 GA+AA genotypes with breast cancer risk among subjects with family history of cancer was found (adjusted OR:2.21, 95% CI:1.20-4.09).</p><p><b>CONCLUSION</b>These findings suggest that the CDT1 838G/A and GMNN 387C/A polymorphisms may not play a major role in the etiology of breast cancer, but CDT1 variant may have a potential role only in genetically susceptible women.</p>
Assuntos
Adulto , Feminino , Humanos , Pessoa de Meia-Idade , Povo Asiático , Genética , Neoplasias da Mama , Etnologia , Genética , Estudos de Casos e Controles , Proteínas de Ciclo Celular , Genética , China , Geminina , Frequência do Gene , Predisposição Genética para Doença , Genética , Genótipo , Reação em Cadeia da Polimerase , Polimorfismo Genético , Genética , Polimorfismo de Fragmento de RestriçãoRESUMO
Background and purpose:It was reported that chemokine receptor CXCR4 and its ligand stromal cell-derived factor 1(SDF-1)were involved in the proliferation,differentiation,and metastasis of tumor.This study was designed to observe the expression of chemokine receptor CXCR4 in hypopharyngeal squamous cell carcinoma tissue and study the relationship between the expression of chemokine receptor CXCR4 and different clinicopathlogical characteristics,and further to explore the clinical significance.Methods:For the detection of the expression of chemokine receptor CXCR4,43 primary hypopharyngeal squamous cell carcinoma tissues,27 normal hypopharyngeal tissues,34 lymph node metastastatic lesions and 9 normal lymph node lesions were detected by immunohistochemical method using rabbit anti-human CXCR4 polyclonal antibody.Results:The positive expression rates of CXCR4 in 43 hypopharyngeal carcinoma tissues and normal tissues were 95.3% and 22.2%,respectively(P