HPV 16 E7 inhibits OSCC cell proliferation, invasion, and metastasis by upregulating the expression of miR-20a

Area of Science:

• Oncology
• Virology
• Molecular Biology

Background:

• Oral squamous cell carcinoma (OSCC) is a prevalent cancer globally.
• Human Papillomavirus type 16 (HPV-16) oncoproteins, particularly E7, are implicated in OSCC pathogenesis.
• MicroRNAs (miRNAs) play crucial roles in cancer development and progression.

Purpose of the Study:

• To investigate the role of HPV-16 E7 in regulating miR-20a expression.
• To determine the effect of HPV-16 E7-mediated miR-20a upregulation on OSCC cell proliferation, invasion, and migration.

Main Methods:

• Western blot and RT-PCR were used to detect HPV-16 E7 protein and miR-20a expression.
• SiRNA was employed to inhibit HPV-16 E7, and plasmid transfection was used for its overexpression.
• Cell proliferation was assessed using CCK-8 assay; invasion and migration were evaluated by Transwell and wound healing assays.

Main Results:

• MiR-20a expression was significantly higher in OSCC tissues than in adjacent normal tissues.
• HPV-16 E7 overexpression upregulated miR-20a, while its inhibition downregulated miR-20a.
• Upregulation of miR-20a by HPV-16 E7 significantly inhibited OSCC cell proliferation, invasion, and migration.

Conclusions:

• HPV-16 E7 promotes OSCC progression by upregulating miR-20a.
• MiR-20a acts as a tumor suppressor in OSCC by inhibiting proliferation, invasion, and migration.
• Targeting the HPV-16 E7/miR-20a axis may offer a therapeutic strategy for OSCC.