miR-204-5p Hampers Breast Cancer Malignancy and Affects the Cell Cycle by Targeting PRR11

Area of Science:

• Molecular Biology
• Oncology
• Gene Regulation

Background:

• Breast cancer (BC) remains a leading cause of cancer-related mortality worldwide.
• Understanding the molecular mechanisms underlying BC progression is crucial for developing effective therapies.

Purpose of the Study:

• To investigate the role and regulatory mechanisms of microRNA-204-5p (miR-204-5p) in breast cancer (BC) cells.
• To identify potential downstream targets of miR-204-5p involved in BC pathogenesis.

Main Methods:

• Quantitative real-time PCR (qRT-PCR) to measure miR-204-5p and PRR11 expression.
• Bioinformatic prediction and dual-luciferase assays to validate miR-204-5p binding to PRR11.
• Western blot analysis for protein expression.
• Cell proliferation (CCK8), cell cycle (flow cytometry), and migration/invasion (Transwell) assays to assess cancer cell functions.

Main Results:

• miR-204-5p was significantly downregulated in BC tissues and cell lines.
• miR-204-5p suppressed BC cell proliferation, migration, invasion, and induced cell cycle arrest.
• PRR11 was identified as a direct target of miR-204-5p.
• Silencing PRR11 partially reversed the effects of miR-204-5p inhibition on BC cell functions.

Conclusions:

• The miR-204-5p/PRR11 axis plays a suppressive role in breast cancer progression.
• miR-204-5p acts as a tumor suppressor in BC by targeting PRR11.
• This finding provides a novel therapeutic target and insight into BC regulation.