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A 3'-UTR SNP Mutation Regulates Breast Cancer Metastasis Through Affecting MiR-208a-5p-DAAM1-RhoA Axis

Overview
Journal Cancer Cell Int
Publisher Biomed Central
Date 2019 Mar 27
PMID 30911286
Citations 18
Authors
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Abstract

Background: Dishevelled-associated activator of morphogenesis 1 (DAAM1) is a member of microfilament-related formins and mediates cell motility in breast cancer (BrCa). However, the genetic mutation status of mRNA and its correlation with pathological characteristics are still unclearly. Methods: A patient cohort and BrCa cells were recruited to demonstrate the role of functional SNP in microRNA-208a-5p binding site of 3'-UTR and underlying mechanism in BrCa metastasis.

Methods: A patient cohort and BrCa cells were recruited to demonstrate the role of functional SNP in microRNA-208a-5p binding site of 3'-UTR and underlying mechanism in BrCa metastasis.

Results: The expression and activation of DAAM1 increased markedly in lymphnode metastatic tissues. A genetic variant (rs79036859 A/G) was validated in the miR-208a-5p binding site of 3'-UTR. The G genotype (AG/GG) was a risk genotype for the metastasis of BrCa by reducing binding affinity of miR-208a-5p for the 3'-UTR. Furthermore, the miR-208a-5p expression level was significantly suppressed in lymphnode metastatic tissues compared with that in non-lymphnode metastatic tissues. Overexpression of miR-208a-5p inhibited DAAM1/RhoA signaling pathway, thereby leading to the decrease of the migratory ability.

Conclusion: Overall, the rs79036859 G variant of 3'-UTR was identified as a relevant role in BrCa metastasis via the diversity of miR-208a-5p binding affinity.

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