lncSNHG3 drives breast cancer progression by epigenetically increasing CSNK2A1 expression level

Area of Science:

• Oncology
• Molecular Biology
• Genetics

Background:

• Long noncoding RNAs (lncRNAs) are increasingly recognized for their roles in cancer development.
• Aberrant expression of lncRNAs contributes to the initiation and progression of various cancers, including breast cancer.

Purpose of the Study:

• To investigate the role of small nucleolar RNA host gene 3 (SNHG3) in breast cancer progression.
• To elucidate the underlying molecular mechanisms by which SNHG3 influences breast cancer malignancy.

Main Methods:

• Analysis of RNA sequencing data from breast cancer tissues.
• In vitro and in vivo experiments including cell proliferation, apoptosis, and xenograft assays.
• Mechanistic studies involving bioinformatics, RNA fluorescence in situ hybridization, luciferase reporter assays, and RNA immunoprecipitation.

Main Results:

• SNHG3 expression was significantly upregulated in breast cancer tissues and correlated with poor patient survival.
• SNHG3 knockdown inhibited breast cancer cell proliferation and tumor growth in vitro and in vivo.
• SNHG3 was found to promote breast cancer progression by sponging miR-485-5p and upregulating Casein kinase II-A1 (CSNK2A1) expression in the cytoplasm.

Conclusions:

• SNHG3 acts as an oncogene in breast cancer, promoting malignant progression through the SNHG3/miR-485-5p/CSNK2A1 axis.
• SNHG3 represents a potential biomarker for breast cancer diagnosis and a promising therapeutic target.