Evaluation of single nucleotide polymorphisms in microRNAs (hsa-miR-196a2 rs11614913 C/T) from Brazilian women with breast cancer.

Abstract:

BACKGROUND:Emerging evidence has shown that miRNAs are involved in human carcinogenesis as tumor suppressors or oncogenes. Single nucleotide polymorphisms (SNPs) located in pre-miRNAs may affect the processing and therefore, influence the expression of mature miRNAs. Previous studies generated conflicting results when reporting association between the hsa-miR-196a2 rs11614913 common polymorphism and breast cancer. METHODS:This study evaluated the hsa-miR-196a2 rs11614913 SNP in 388 breast cancer cases and 388 controls in Brazilian women. Polymorphism was determined by real-time PCR; control and experimental groups were compared through statistical analysis using the X2 or Fisher's exact tests. RESULTS:The analysis of the SNPs frequencies showed a significant difference between the groups (BC and CT) in regards to genotype distribution (χ2: p = 0.024); the homozygous variant (CC) was more frequent in the CT than in the BC group (p = 0.009). The presence of the hsa-miR-196a2 rs11614913 C/T polymorphism was not associated with histological grades (p = 0.522), axillary lymph node positive status (p = 0.805), or clinical stage (p = 0.670) among the breast cancer patients. CONCLUSIONS:The results of this study indicated that the CC polymorphic genotype is associated with a decreased risk of BC and the presence of the T allele was significantly associated with an increased risk of BC.

journal_name

BMC Med Genet

journal_title

BMC medical genetics

authors

Linhares JJ,Azevedo M Jr,Siufi AA,de Carvalho CV,Wolgien Mdel C,Noronha EC,Bonetti TC,da Silva ID

doi

10.1186/1471-2350-13-119

subject

Has Abstract

pub_date

2012-12-10 00:00:00

pages

119

issn

1471-2350

pii

1471-2350-13-119

journal_volume

13

pub_type

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