Journal
GENE
Volume 642, Issue -, Pages 241-248Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/j.gene.2017.11.013
Keywords
LncRNA; MALAT1; SNP; Breast cancer; Expression
Categories
Funding
- National Natural Science Foundation of China [U1604168]
- Major Project of science and technology in Henan Province [161100311400]
- Medical Science and Technology key projects of Henan Province and Zhengzhou [201602295, 20150374]
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The long non-coding RNA (lncRNA) Metastasis-associated lung adenocarcinoma transcript 1(MALAT1) has been implicated in breast cancer (BC). Polymorphisms in MALAT1 may play a vital role in the progress of breast cancer by its regulation function. However, potential genetic variants in MALAT1 affecting the development of BC is rarely explored. In our current molecular epidemiology study, all three tagging SNPs (rs3200401, rs619586 and rs7927113) in lncRNA MALATI were selected for genotyping in 487 BCE patients and 489 cancer-free controls in Chinese Han population, and futher experiment of quantitative real-time (qRT) PCR was conducted to examine the relative expression of MALAT1. The results showed that individuals with genotype AG of rs619586 has a decreased risk of BC in codominant model (OR: 0.684, 95%CI: 0.478-0.979), dominant mode (OR: 0.675, 95%CI: 0.479-0.951) and over-dominant model (OR: 0.692, 95%CI: 0484-0.989). Also, qRT-PCR results revealed that the expression for MALATI with AG (0.827 +/- 0.490), GG (0.511 +/- 0.149) and AG + GG genotypes (0.743 +/- 0.447) of rs619586 was significantly lower than that with genotype AA (1.511 +/- 0.737). In addition, females with genotype CT of rs3200401 had a lower risk of BC in the codominant model (OR: 0.75, 95%CI: 0.559-1.007) and over-dominant model (OR: 0.741, 95%CI: 0.552-0.993). In summary, our results implied that the genetic variants of lncRNA MALATI were associated with the susceptibility of BC, and meaningful genetic alteration might affect the corresponding mRNA expression of lncRNA MALAT1.
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