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Open Access Research

Polymorphisms in the p63 and p73 genes are associated with ovarian cancer risk and clinicopathological variables

Xiao Guan1, Ning Zhang2, Yongshuo Yin3, Beihua Kong1, Qifeng Yang2, Zhiyan Han4 and Xingsheng Yang1*

Author Affiliations

1 Department of Obstetrics and Gynecology, Qilu Hospital, Shandong University, 107#, Wenhua Xi Road, Jinan, P.R. China

2 Department of Breast Surgery, Qilu Hospital, Shandong University, 107#, Wenhua Xi Road, Jinan, P.R. China

3 Department of Surgical Oncology, Dongguan People's Hospital of Guangdong Province, 3#, New Guchong Road, Dongguan, P.R. China

4 School of Public Health, Shandong University, 44#, Wenhua Xi Road, Jinan, P.R. China

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Journal of Experimental & Clinical Cancer Research 2012, 31:89  doi:10.1186/1756-9966-31-89

Published: 24 October 2012

Abstract

Objective

p73 and p63 are two structural and functional homologs of p53, and their biological functions in cancer progression have attracted attention due to the presence of variants generated by genetic polymorphisms. Recently, three single nucleotide polymorphisms (SNPs) in the p63 and p73 genes have been associated with female reproduction. In the present study, we aimed to evaluate the relationship between these SNPs and ovarian cancer susceptibility and clinical pathology.

Methods

We genotyped the p63 (rs873330 [Genbank, refSNP ID] T > C [T: original base, C: mutant base]) and p73 (rs4648551 G > A and rs6695978 G > A) SNPs in ovarian cancers and healthy controls and analyzed the distributions of genotype frequencies to evaluate the association of the genotypes with the risk of ovarian cancer and the clinicopathological characteristics. Logistic regression models were applied in statistical analyses.

Results

Our research revealed that p73 rs6695978 G > A was significantly associated with ovarian cancer patients. Women with the A allele were at increased risk of ovarian cancer compared to carriers of the G allele (OR = 1.55; 95% CI:1.07–2.19; P = 0.003). Meanwhile, the at-risk A allele was positively related with the occurrence of mucinous ovarian cancer (OR = 3.48; 95% CI:1.15-6.83; P = 0.001), low degree of differentiation (OR = 1.87; 95% CI:1.03-3.47; P = 0.003), lymph node metastasis (OR = 1.69; 95% CI: 1.14-2.75; P = 0.010) and estrogen receptor positive (OR = 2.72; 95% CI: 1.38-4.81; P = 0.002). However, we were unable to find any associations of the polymorphisms in another two SNPs (rs4648551 G > A, rs873330 T > C) with ovarian cancer risk and clinicopathological parameters.

Conclusions

The p73 rs6695978 G > A polymorphism will serve as a modifier of ovarian cancer susceptibility and prognosis. Further investigations with large sample sizes and of the mechanistic relevance of p73 polymorphism will be warranted

Keywords:
Polymorphism; Single nucleotide polymorphisms; Ovarian cancer; p73; p63