title: P27 V109G Polymorphism is associated with lymph node metastases but not with increased risk of breast cancer.
abstract: The p27 V109G polymorphism was investigated using polymerase chain reaction-restriction fragment length polymorphism (PCR-RFLP) method in a hospital-based Malaysian population. Peripheral blood samples were collected from 230 breast cancer patients and 200 normal and healthy women who had no history of breast disease or breast cancer. We evaluated the association between the p27 polymorphism and breast cancer risk, and clinico-pathological parameters in the population. The distribution of genotype and allele frequencies of p27 V109G polymorphism were not significantly different between the breast cancer cases and normal subjects (P=0.376). Women who were homozygous (OR=1.73; 95% CI, 0.62-4.92) or heterozygous (OR=1.26; 95% CI, 0.75-2.12) for G allele, or carriers of G allele genotype (OR=1.34; 95%, 0.83-2.16) or G allele (OR=1.36; 95% CI, 0.90-2.05) were not associated with breast cancer risk. No significant correlation was noted between G allele genotype and breast cancer risk among patients under 50 (OR=1.28; 95% CI, 0.62-2.66) or 50 years and older (OR=1.38; 95% CI, 0.71-2.66) at diagnosis. The G allele genotype was significantly associated with lymph node metastases but independent of ER status and histological grade. In conclusion, the polymorphic variant at codon 109 of p27 gene may not be a marker for determining patients' risk of developing breast cancer but it may be a potential genetic marker for poor prognosis, thereby a marker for tumor prognosis.
authors.affiliation: Department of Molecular Medicine, Faculty of Medicine, University of Malaya, Malaysia. kdrakeshna@hotmail.com
authors.forename: R
authors.initials: R
authors.lastname: Naidu
authors.forename: Y C
authors.initials: YC
authors.lastname: Har
authors.forename: N A M
authors.initials: NA
authors.lastname: Taib
mesh_terms: D001943:Breast Neoplasms / Q000737:chemistry / Q000453:epidemiology / Q000235:genetics* / Q000473:pathology; D018270:Carcinoma, Ductal, Breast / Q000737:chemistry / Q000453:epidemiology / Q000235:genetics* / Q000473:pathology; D016022:Case-Control Studies; D050760:Cyclin-Dependent Kinase Inhibitor p27; D005260:Female; D015972:Gene Expression Regulation, Neoplastic; D005787:Gene Frequency; D020022:Genetic Predisposition to Disease; D005838:Genotype; D005998:Glycine; D006579:Heterozygote; D006720:Homozygote; D006801:Humans; D047908:Intracellular Signaling Peptides and Proteins / Q000235:genetics*; D008198:Lymph Nodes / Q000473:pathology*; D008207:Lymphatic Metastasis; D008296:Malaysia / Q000453:epidemiology; D008875:Middle Aged; D009367:Neoplasm Staging; D016017:Odds Ratio; D010641:Phenotype; D012150:Polymorphism, Restriction Fragment Length; D011379:Prognosis; D011960:Receptors, Estrogen / Q000032:analysis; D018570:Risk Assessment; D012307:Risk Factors; D014633:Valine
chemical_list: C436291:CDKN1B protein, human; D047908:Intracellular Signaling Peptides and Proteins; D011960:Receptors, Estrogen; D050760:Cyclin-Dependent Kinase Inhibitor p27; D014633:Valine; D005998:Glycine