DSCAM-AS1 accelerates cell proliferation and migration in osteosarcoma through miR-186-5p/GPRC5A signaling

Area of Science:

• Oncology
• Molecular Biology
• Genetics

Background:

• Osteosarcoma (OS) is a primary bone cancer affecting adolescents and children.
• Long noncoding RNAs (lncRNAs) are implicated in cancer development.
• The role of DSCAM-AS1 in OS remains largely unknown.

Purpose of the Study:

• To investigate the role and mechanism of DSCAM-AS1 in osteosarcoma.
• To explore the relationship between DSCAM-AS1, miR-186-5p, and GPRC5A in OS.

Main Methods:

• Validated high DSCAM-AS1 levels in OS cell lines.
• Assessed the effects of DSCAM-AS1 depletion on OS cell proliferation, migration, and EMT.
• Investigated the interaction between DSCAM-AS1 and miR-186-5p.
• Identified GPRC5A as a downstream target of miR-186-5p.
• Conducted in vivo studies using NPC tumor xenografts.

Main Results:

• DSCAM-AS1 depletion inhibited OS cell proliferation, migration, and epithelial-mesenchymal transition (EMT).
• DSCAM-AS1 sponges miR-186-5p, leading to increased GPRC5A expression.
• Upregulation of GPRC5A reversed the inhibitory effects of DSCAM-AS1 knockdown.
• DSCAM-AS1 knockdown suppressed tumor growth in vivo.

Conclusions:

• DSCAM-AS1 promotes osteosarcoma progression by regulating the miR-186-5p/GPRC5A axis.
• DSCAM-AS1 acts as a molecular sponge for miR-186-5p, upregulating GPRC5A.
• DSCAM-AS1 represents a potential therapeutic target for osteosarcoma treatment.