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Cancer Cell International
Published in: Cancer Cell International 1/2021

Open Access 01-12-2021 | Metastasis | Primary research

lncRNA APOC1P1-3 promoting anoikis-resistance of breast cancer cells

Authors: Qi Lu, Li Wang, Yabiao Gao, Ping Zhu, Luying Li, Xue Wang, Youping Jin, Xiuling Zhi, Jerry Yu, Xin Li, Xingjun Qin, Ping Zhou

Published in: Cancer Cell International | Issue 1/2021

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Abstract

Background

Anoikis resistance plays a critical role in the tumor metastasis by allowing survival of cancer cells in the systemic circulation. We previously showed that long non-coding RNAs APOC1P1-3 (lncRNA APOC1P1-3) inhibit apoptosis of breast cancer cells. In this study, we explored its role in anoikis resistance.

Methods

We induced anoikis resistance in two breast cancer cell lines (MCF-7 and MDA-MB-231) under anchorage-independent culture conditions and studied lncRNA APOC1P1-3 effects on apoptosis. Using Dual-Luciferase activity assay, we determined whether it specifically binds to miRNA-188-3P. We further explored its role in lung metastasis by injecting MDA-MB-231 and MDA-MB-231-APOC1P1-3-knock-down cells in female BALB/c nude mice.

Results

We found that lncRNA APOC1P1-3 suppressed early apoptosis of these cells (demonstrated by gain or loss of their function, respectively) and promoted anoikis resistance via reducing activated- Caspase 3, 8, 9 and PARP. Moreover, it specifically binds to the target miRNA-188-3p acting as a “sponge” to block the inhibition of Bcl-2 (an anti-apoptosis protein).

Conclusions

Our study supports a theory that lncRNA APOC1P1-3 can promote development of breast cancer metastasis via anoikis resistance by specifically binding to miRNA-188-3p to block the inhibition of Bcl-2.
Appendix
Available only for authorised users
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Metadata
Title
lncRNA APOC1P1-3 promoting anoikis-resistance of breast cancer cells
Authors
Qi Lu
Li Wang
Yabiao Gao
Ping Zhu
Luying Li
Xue Wang
Youping Jin
Xiuling Zhi
Jerry Yu
Xin Li
Xingjun Qin
Ping Zhou
Publication date
01-12-2021
Publisher
BioMed Central
Published in
Cancer Cell International / Issue 1/2021
Electronic ISSN: 1475-2867
DOI
https://doi.org/10.1186/s12935-021-01916-w

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