LINC00461 Overexpression Can Induce Docetaxel Resistance in Breast Cancer by Interacting with miR-411-5p.

Abstract:

Purpose:Breast cancer (BC) is the most common malignant cancer in women worldwide. Recently, long non-coding RNAs (LncRNAs) have been reported to have essential roles in BC tumorigenesis. Patients and Methods:Tumor and adjacent non-tumor tissue samples were collected from patients with BC (n = 168) for comparison of LncRNA and miRNA expression levels. Patient clinical, demographic, and molecular data were analyzed by univariate and multivariate methods to identify factors associated with patient survival, and a nomogram was generated using significant risk/protective factors. Further, analyses of LINC00461 and miR-411-5p expression and function were conducted in BC and normal breast epithelial cell lines, by quantitative RT-PCR, cell proliferation, wound-healing, RNA pull-down, RNA immunoprecipitation, and luciferase assays. Docetaxel (DTX)-resistant BC cell lines were also generated and used to assess the roles of LINC00461 and miR-411-5p in drug resistance. Results:LINC00461 was up-regulated in BC tissues relative to adjacent non-tumor samples, and expression of LINC00461 was correlated with poor patient prognosis. LINC00461 knockdown could inhibit proliferation of BC cells in vitro. Further, LINC00461 expression was higher in DTX-resistant than in non-resistant BC cell lines. Our data support a role for LINC00461 as a competitive endogenous RNA sponge involved in regulation of miR-411-5p expression in BC. miR-411-5p was down-regulated in both BC tissues and cell lines, with levels negatively correlated with those of LINC00461. Moreover, miR-411-5p was down-regulated in DTX-resistant BC cell lines compared with non-resistant cell lines. Conclusion:In conclusion, LINC00461 promotes proliferation, migration, and DTX-resistance in BC by acting as a sponge for miR-411-5p. This process represents a potential therapeutic target for patients with BC.

journal_name

Onco Targets Ther

journal_title

OncoTargets and therapy

authors

Zhang C,Wang J,Zhang J,Qu H,Tang X

doi

10.2147/OTT.S247776

subject

Has Abstract

pub_date

2020-06-12 00:00:00

pages

5551-5562

issn

1178-6930

pii

247776

journal_volume

13

pub_type

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