Long non-coding RNA X-inactive specific transcript promotes osteosarcoma metastasis via modulating...

Area of Science:

• Oncology
• Molecular Biology
• Genetics

Background:

• Osteosarcoma (OS) is a prevalent bone sarcoma impacting numerous lives.
• Understanding the molecular mechanisms of OS metastasis is crucial for effective treatment.

Purpose of the Study:

• To investigate the roles of long non-coding RNA XIST and microRNA-758 in osteosarcoma metastasis.
• To identify the downstream effector of the XIST/miR-758 axis in OS.

Main Methods:

• Quantitative reverse transcription PCR (qRT-PCR) to assess XIST and miR-758 expression.
• Cell transfection to manipulate XIST and miR-758 levels, followed by assays for cell viability, migration, and invasion.
• Dual-luciferase reporter assay to confirm regulatory interactions between XIST, miR-758, and Rab16.

Main Results:

• XIST was upregulated, while miR-758 was downregulated in OS tissues and cells.
• XIST overexpression and miR-758 inhibition promoted OS cell migration, invasion, and epithelial-mesenchymal transition (EMT).
• XIST directly regulated miR-758, which in turn regulated Rab16; Rab16 overexpression counteracted miR-758 mimic effects.

Conclusions:

• The lncRNA XIST facilitates osteosarcoma cell migration, invasion, and EMT.
• XIST exerts its pro-metastatic effects through the miR-758/Rab16 signaling pathway.