CircBNC2 affects epithelial ovarian cancer progression through the miR-223-3p/ LARP4 axis

Area of Science:

• Oncology
• Molecular Biology
• Gene Regulation

Background:

• Epithelial ovarian cancer (EOC) is a significant health concern with complex molecular underpinnings.
• Circular RNAs (circRNAs) are emerging as critical regulators in various cancers, but their role in EOC is not fully understood.
• The specific function and mechanism of circRNA BNC2 (circBNC2) in EOC remain largely unknown.

Purpose of the Study:

• To investigate the expression levels of circBNC2, microRNA-223-3p (miR-223-3p), and La-related protein 4 (LARP4) in EOC.
• To elucidate the molecular mechanism by which circBNC2 influences EOC cell behavior.
• To explore the regulatory axis involving circBNC2, miR-223-3p, and LARP4 in EOC.

Main Methods:

• Quantitative real-time fluorescence PCR (qRT-PCR) to measure RNA expression.
• In-vitro cell-based assays to assess cell proliferation, migration, and invasion.
• Western blot to analyze protein expression levels.
• Dual-luciferase reporter assays to confirm molecular interactions.
• Xenotransplantation models in vivo to evaluate tumor growth.

Main Results:

• circBNC2 and LARP4 expression were decreased, while miR-223-3p expression was increased in EOC tissues.
• circBNC2 acts as a sponge for miR-223-3p, and LARP4 is a direct target of miR-223-3p.
• Overexpression of circBNC2 suppressed EOC cell malignant behaviors in vitro and tumor growth in vivo.
• The suppressive effects of circBNC2 were partially reversed by miR-223-3p mimics, and LARP4 knockdown counteracted the inhibition by miR-223-3p inhibitors.

Conclusions:

• circBNC2 inhibits EOC progression by regulating the miR-223-3p/LARP4 axis.
• circBNC2 acts as a tumor suppressor in EOC through this molecular pathway.
• The circBNC2/miR-223-3p/LARP4 axis represents a potential therapeutic strategy for epithelial ovarian cancer.