Hsa_Circ_0001206 is downregulated and inhibits cell proliferation, migration and invasion in prostate cancer

Area of Science:

• Oncology
• Molecular Biology
• Genetics

Background:

• Prostate cancer (PCa) remains a significant health concern with a need for novel diagnostic and therapeutic targets.
• Circular RNAs (circRNAs) are emerging as key regulators in various cancers, including PCa, but their roles are not fully elucidated.

Purpose of the Study:

• To investigate the expression profiles and functional roles of circRNAs in prostate cancer.
• To identify potential circRNA biomarkers for PCa diagnosis and prognosis.
• To elucidate the regulatory mechanisms of circRNAs in PCa pathogenesis.

Main Methods:

• Microarray analysis to screen differentially expressed circRNAs and mRNAs in PCa tissues.
• Quantitative real-time PCR (qRT-PCR) for validation of circRNA expression.
• Co-expression and competitive endogenous RNA (ceRNA) network construction.
• In vitro and in vivo experiments to assess the functional impact of circRNAs.
• Dual-luciferase reporter assays to confirm direct interactions.

Main Results:

• 95 circRNAs and 830 mRNAs were found to be significantly differentially expressed in PCa.
• Three circRNAs (hsa_circ_0001206, hsa_circ_0001633, hsa_circ_0009061) were validated as down-regulated in PCa.
• hsa_circ_0001206 and hsa_circ_0009061 showed significant association with clinical features and good diagnostic value for PCa.
• Overexpression of hsa_circ_0001206 inhibited PCa cell proliferation, migration, invasion, and tumor growth.
• hsa_circ_0001206 directly targets miR-1285-5p and influences Smad4 expression.

Conclusions:

• circRNAs play crucial roles in the pathogenesis of prostate cancer.
• hsa_circ_0001206 acts as a tumor suppressor in PCa by regulating the miR-1285-5p/Smad4 axis.
• hsa_circ_0001206 holds potential as a diagnostic biomarker and therapeutic target for prostate cancer.