The novel circular RNA circ-PGAP3 retards cervical cancer growth by regulating the miR-769-5p/p53 axis

Area of Science:

• Oncology
• Molecular Biology
• Genetics

Background:

• Cervical cancer (CC) remains a significant health challenge for women globally.
• Understanding CC pathogenesis is crucial for developing effective clinical treatments.
• Circular RNAs (circRNAs) are emerging as key players in cancer development and progression.

Purpose of the Study:

• To identify and characterize novel circRNAs involved in cervical cancer.
• To elucidate the functional role and underlying mechanism of circ-PGAP3 in CC.
• To explore the potential of circ-PGAP3 as a therapeutic target for cervical cancer.

Main Methods:

• In silico analysis and quantitative real-time PCR (qRT-PCR) to identify and quantify circ-PGAP3 expression in CC tissues.
• In vitro cell proliferation assays and in vivo tumor growth experiments to assess the functional impact of circ-PGAP3.
• Mechanism studies involving p53, miR-769-5p, and downstream targets to elucidate the regulatory pathway.

Main Results:

• A novel circRNA, circ-PGAP3 (hsa_circ_0106800), was found to be significantly downregulated in CC tissues.
• Low circ-PGAP3 expression correlated with poor patient prognosis.
• Overexpression of circ-PGAP3 suppressed CC cell proliferation in vitro and tumor growth in vivo.
• circ-PGAP3 acts as a tumor suppressor by sponging miR-769-5p, thereby increasing p53 levels and inhibiting CC tumorigenesis.
• A regulatory feedback loop between circ-PGAP3 and p53 was confirmed in vivo.

Conclusions:

• circ-PGAP3 plays a critical tumor-inhibiting role in cervical cancer.
• The circ-PGAP3/miR-769-5p/p53 axis represents a novel regulatory pathway in CC pathogenesis.
• Restoration of circ-PGAP3 holds promise as a potential therapeutic strategy for cervical cancer.