Overexpression of miR-1258 inhibits cell proliferation by targeting AKT3 in osteosarcoma

Area of Science:

• Oncology
• Molecular Biology
• Genetics

Background:

• Osteosarcoma (OS) is a primary bone cancer affecting children and adolescents.
• MicroRNAs (miRNAs) are crucial regulators in cancer development.
• The role of miR-1258 in OS remains understudied.

Purpose of the Study:

• To investigate the expression and function of miR-1258 in osteosarcoma.
• To identify the molecular targets and pathways regulated by miR-1258 in OS.
• To evaluate miR-1258 as a potential prognostic marker and therapeutic target for OS.

Main Methods:

• Quantitative real-time PCR to measure miR-1258 and AKT3 expression in OS tissues and cell lines.
• Cell proliferation assays and cell cycle analysis to assess the functional role of miR-1258.
• Bioinformatic analysis and luciferase reporter assays to identify AKT3 as a direct target of miR-1258.
• Rescue experiments to validate the miR-1258-AKT3 interaction in OS cells.

Main Results:

• miR-1258 expression was significantly downregulated in OS tissues and cell lines.
• Low miR-1258 expression correlated with advanced clinical manifestations and poor prognosis in OS patients.
• Upregulation of miR-1258 suppressed OS cell proliferation and induced G0/G1 cell cycle arrest.
• AKT3 was identified as a direct target of miR-1258, with its expression inversely correlated with miR-1258 in OS.
• AKT3 upregulation promoted OS progression, and its effects were rescued by inhibiting miR-1258.

Conclusions:

• The miR-1258-AKT3 axis plays a critical role in the development and progression of osteosarcoma.
• miR-1258 functions as a tumor suppressor in OS by targeting AKT3.
• The miR-1258-AKT3 pathway represents a potential prognostic biomarker and therapeutic target for osteosarcoma.