MicroRNA-22-3p targeted regulating transcription factor 7-like 2 (TCF7L2) constrains the Wnt/β-catenin pathway and...

Area of Science:

• Oncology
• Molecular Biology
• Gene Regulation

Background:

• MicroRNAs (miRNAs) play a role in osteosarcoma (OS) development.
• The specific role of miR-22-3p in OS progression was previously unclear.

Purpose of the Study:

• To investigate the molecular mechanisms of miR-22-3p in osteosarcoma.
• To explore the potential of the miR-22-3p/TCF7L2 axis as a therapeutic target.

Main Methods:

• Analysis of miR-22-3p and TCF7L2 expression in OS tissues and cells.
• In vitro experiments assessing the effects of miR-22-3p and TCF7L2 on OS cell progression and the Wnt/β-catenin pathway.
• Functional rescue experiments and in vivo transplantation studies in nude mice.

Main Results:

• miR-22-3p was downregulated in OS tissues and cells, inversely correlated with TCF7L2.
• Elevated miR-22-3p suppressed OS cell proliferation, migration, and the Wnt/β-catenin pathway.
• TCF7L2 was identified as a direct target of miR-22-3p, and its knockdown reversed miR-22-3p's effects.
• In vivo studies confirmed that miR-22-3p inhibited OS tumor growth by downregulating TCF7L2 and the Wnt/β-catenin pathway.

Conclusions:

• miR-22-3p acts as a tumor suppressor in osteosarcoma by targeting TCF7L2 and inhibiting the Wnt/β-catenin pathway.
• The miR-22-3p/TCF7L2 axis represents a promising molecular target for osteosarcoma therapy.