Long noncoding RNA SNHG8 promotes the proliferation of osteosarcoma cells by downregulating miR-542-3p

Area of Science:

• Oncology
• Molecular Biology
• Genetics

Background:

• Small nucleolar RNA host genes (SNHGs) are long noncoding RNAs (lncRNAs) implicated in various cancers.
• The specific role and molecular mechanisms of lncRNA SNHG8 in osteosarcoma (OS) pathogenesis are not well understood.

Purpose of the Study:

• To investigate the role and molecular mechanisms of lncRNA SNHG8 in osteosarcoma.
• To determine the correlation between SNHG8, miR-542-3p, and clinical outcomes in OS patients.

Main Methods:

• TCGA cohort analysis for SNHG8 and miR-542-3p expression correlation with clinicopathological features and prognosis.
• In vitro assays (MTT, Transwell) to assess cell viability and invasion.
• Luciferase reporter assay to confirm the interaction between SNHG8 and miR-542-3p.
• qRT-PCR to analyze SNHG8's effect on miR-542-3p expression in OS cell lines (MG-63, SW-1353).

Main Results:

• Elevated SNHG8 expression or decreased miR-542-3p expression correlated with poor survival and tumor recurrence in OS patients.
• Overexpression of SNHG8 enhanced proliferation and invasion in MG-63 cells, while silencing SNHG8 inhibited these processes in SW-1353 cells.
• SNHG8 negatively regulated miR-542-3p expression and directly interacted with it, thereby attenuating SNHG8-induced cell proliferation.

Conclusions:

• lncRNA SNHG8 promotes osteosarcoma cell proliferation and invasion.
• SNHG8 exerts its oncogenic effects by downregulating miR-542-3p, suggesting a potential therapeutic target for osteosarcoma.