MiR-17-3p Facilitates Aggressive Cell Phenotypes in Colon Cancer by Targeting PLCD1 Through Affecting KIF14

Area of Science:

• Oncology
• Molecular Biology
• Genetics

Background:

• Colon cancer (CC) is a significant global health challenge.
• MicroRNAs (miRNAs) play a critical role in cancer development and progression.
• Understanding miRNA dysregulation in CC is crucial for identifying therapeutic targets.

Purpose of the Study:

• To investigate the role of differentially expressed miRNAs in colon cancer.
• To elucidate the functional relationship between miR-17-3p and its target gene PLCD1 in CC.
• To explore the underlying molecular mechanisms of miR-17-3p in regulating CC cell behavior.

Main Methods:

• Bioinformatic analysis of TCGA database to identify differentially expressed miRNAs in CC.
• Target prediction using TargetScan and miRTarBase databases.
• Experimental validation including dual-luciferase reporter assays, cell proliferation, migration, invasion, and apoptosis assays (CCK-8, colony formation, Transwell, flow cytometry).
• Co-immunoprecipitation (CO-IP) assay and BioGRID analysis to investigate gene interactions.

Main Results:

• miR-17-3p was found to be highly expressed in CC tissues and cell lines.
• Phospholipase C delta 1 (PLCD1) was identified as a direct target of miR-17-3p and was lowly expressed in CC.
• Overexpression of miR-17-3p promoted CC cell proliferation, migration, and invasion while suppressing apoptosis.
• Simultaneous overexpression of PLCD1 attenuated the effects of miR-17-3p on CC cell malignant progression.
• The miR-17-3p/PLCD1 axis was implicated in regulating KIF14, a tumor-promoting gene.

Conclusions:

• miR-17-3p facilitates colon cancer progression by downregulating PLCD1 expression.
• The miR-17-3p/PLCD1 axis represents a potential therapeutic target for colon cancer treatment.
• This study provides novel insights into the molecular mechanisms driving colon cancer development.