Long noncoding RNA FGF14-AS2 inhibits breast cancer metastasis by regulating the miR-370-3p/FGF14 axis

Area of Science:

• Oncology
• Molecular Biology
• Genetics

Background:

• Long noncoding RNAs (lncRNAs) are key regulators in cancer, but their roles in breast cancer metastasis remain incompletely understood.
• Identifying novel lncRNAs and their mechanisms is crucial for understanding breast cancer progression and developing targeted therapies.

Purpose of the Study:

• To investigate the role of the novel lncRNA FGF14-AS2 in breast cancer metastasis.
• To elucidate the underlying molecular mechanisms involving FGF14-AS2 in breast cancer progression.

Main Methods:

• Analysis of FGF14-AS2 expression in breast cancer tissues and correlation with clinical stage.
• In vitro and in vivo experiments to assess the functional impact of FGF14-AS2 alterations on cancer cell behavior.
• Mechanistic studies to identify interactions between FGF14-AS2, miR-370-3p, and FGF14.

Main Results:

• FGF14-AS2 was significantly downregulated in breast cancer tissues, with lower expression linked to advanced clinical stage.
• Altered FGF14-AS2 levels affected breast cancer cell migration, invasion, and tumor metastasis in vitro and in vivo.
• FGF14-AS2 acts as a competing endogenous RNA for miR-370-3p, leading to FGF14 activation.
• miR-370-3p was upregulated, and FGF14 was downregulated in breast cancer tissues.
• FGF14-AS2 expression inversely correlated with miR-370-3p and positively with FGF14.

Conclusions:

• The FGF14-AS2/miR-370-3p/FGF14 axis is a critical regulator of breast cancer metastasis.
• FGF14-AS2 functions as a tumor suppressor by inhibiting metastasis through this axis.
• This axis represents a potential therapeutic target for breast cancer treatment.