MicroRNA-142-3p suppresses cell proliferation and migration in bladder cancer via Rac1

Area of Science:

• Oncology
• Molecular Biology
• Biochemistry

Background:

• MicroRNA (miR)-142-3p is associated with various cancers, but its role in bladder cancer (BC) is unclear.
• Understanding miR-142-3p's function is crucial for developing novel BC therapeutic strategies.

Purpose of the Study:

• To investigate the correlation between miR-142-3p expression and bladder cancer cell proliferation, migration, and invasion.
• To elucidate the mechanism by which miR-142-3p influences bladder cancer progression via Rac1.

Main Methods:

• Quantitative real-time PCR (qRT-PCR) to measure miR-142-3p expression in tissues and cell lines.
• RNA transfection to modulate miR-142-3p levels, followed by CCK-8 and trans-well assays.
• Dual luciferase reporter assay to confirm direct interaction between Rac1 and miR-142-3p; Western blot to assess protein expression.

Main Results:

• miR-142-3p expression was significantly lower in bladder cancer tissues compared to adjacent tissues.
• Upregulating miR-142-3p inhibited proliferation, migration, and invasion of bladder cancer cells (SV-HUC-1, BIU-87).
• Conversely, downregulating miR-142-3p enhanced these processes. miR-142-3p directly interacts with and regulates Rac1 expression.

Conclusions:

• miR-142-3p plays a critical role in suppressing bladder cancer progression.
• The findings suggest that miR-142-3p inhibits bladder cancer cell proliferation, migration, and invasion by regulating Rac1.