MicroRNA-221-3p, a TWIST2 target, promotes cervical cancer metastasis by directly targeting THBS2

Area of Science:

• Oncology
• Molecular Biology
• Genetics

Background:

• Cervical cancer metastasis is a major cause of mortality.
• The molecular mechanisms driving cervical cancer relapse and metastasis require further investigation.

Purpose of the Study:

• To elucidate the role of microRNAs in cervical cancer metastasis.
• To identify the molecular mechanisms underlying miR-221-3p's function in cervical cancer lymph node metastasis.

Main Methods:

• Analysis of microRNA expression in metastatic versus non-metastatic cervical cancer tissues.
• In vitro and in vivo experiments to assess the effects of miR-221-3p overexpression on epithelial-mesenchymal transition (EMT), cell migration, invasion, and lymphatic metastasis.
• Identification of transcription factors regulating miR-221-3p using computational and experimental approaches.
• Determination of downstream target genes of miR-221-3p.

Main Results:

• miR-221-3p expression was significantly higher in metastatic cervical cancer tissues.
• Forced miR-221-3p overexpression promoted EMT, cell migration, invasion, and lymphatic metastasis.
• TWIST2 was identified as a key transcription factor that upregulates miR-221-3p.
• Inhibiting miR-221-3p reversed TWIST2-mediated EMT and metastasis.
• THBS2 was identified as a direct downstream target of miR-221-3p, with its expression inversely correlated with miR-221-3p and TWIST2 levels in metastatic tissues.

Conclusions:

• TWIST2 upregulates miR-221-3p, which in turn suppresses THBS2 expression.
• This TWIST2-miR-221-3p-THBS2 axis plays a critical role in promoting lymph node metastasis in cervical cancer.
• miR-221-3p represents a potential therapeutic target for inhibiting cervical cancer metastasis.