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Long non-coding RNA TMPO-AS1 promotes tumor progression via sponging miR-140-5p in breast cancer

Dandan Zhu1, Weize Lv2, Xiao Zhou3

  • 1Department of Medical Oncology, The Third Affiliated Hospital of Harbin Medical University, Harbin, Heilongjiang 150040, P.R. China.

Experimental and Therapeutic Medicine
|November 25, 2020
PubMed

Insights

Long non-coding RNA TMPO-AS1 is upregulated in breast cancer and promotes tumor growth and metastasis. Inhibiting TMPO-AS1 suppressed cancer cell viability and invasion, suggesting it as a potential therapeutic target.

Area of Science:

  • Oncology
  • Molecular Biology
  • Genetics

Background:

  • Long non-coding RNAs (lncRNAs) are emerging regulators in cancer development.
  • The specific roles of lncRNAs, like TMPO-AS1, in breast cancer remain largely undefined.
  • Understanding lncRNA dysregulation is crucial for identifying novel therapeutic targets.

Purpose of the Study:

  • To investigate the clinical significance and biological functions of lncRNA TMPO antisense RNA 1 (TMPO-AS1) in breast cancer.
  • To explore the underlying molecular mechanisms of TMPO-AS1 in breast cancer progression.
  • To assess TMPO-AS1 as a potential therapeutic target for breast cancer.

Main Methods:

  • Quantification of TMPO-AS1 expression in breast cancer tissues and cell lines.
  • In vitro and in vivo assays to evaluate the functional impact of TMPO-AS1 knockdown.
  • Luciferase reporter assays to determine the interaction between TMPO-AS1 and miR-140-5p.

Main Results:

  • TMPO-AS1 expression was significantly elevated in breast cancer tissues and cell lines.
  • TMPO-AS1 knockdown reduced breast cancer cell viability, migration, and invasion in vitro.
  • TMPO-AS1 knockdown decreased metastatic colonization in vivo and acts as a competing endogenous RNA by sponging miR-140-5p.

Conclusions:

  • TMPO-AS1 plays a significant role in promoting breast cancer cell viability and metastasis.
  • TMPO-AS1 functions by sponging miR-140-5p, acting as a competing endogenous RNA.
  • TMPO-AS1 represents a promising therapeutic target for breast cancer treatment.
Keywords:
TMPO antisense RNA 1breast cancermetastatic colonizationmicroRNA-140-5pviability

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