MicroRNA Profile Identifies miR-6165 Could Suppress Gastric Cancer Migration and Invasion by Targeting STRN4

Area of Science:

• Molecular Oncology
• Cancer Biology
• Genetics

Background:

• Aberrant microRNA (miRNA) expression is implicated in gastric cancer (GC) pathogenesis.
• Previous studies identified differential miRNA and mRNA expression in GC tissues, necessitating identification of key molecules.
• Understanding critical molecular players is crucial for advancing GC diagnosis and treatment.

Purpose of the Study:

• To identify novel microRNAs (miRNAs) and their targets involved in gastric cancer (GC).
• To elucidate the functional role of identified miRNAs in GC cell behavior.
• To evaluate the diagnostic and prognostic potential of key molecules in GC.

Main Methods:

• High-throughput microarray sequencing for miRNA and mRNA profiling in GC and normal tissues.
• Bioinformatics analysis and database prediction to identify miRNA-mRNA interactions.
• Real-time quantitative polymerase chain reaction (RT-qPCR), luciferase reporter assays, immunohistochemistry (IHC), wound healing, and Transwell assays to validate findings.
• Statistical analysis for diagnostic and prognostic value assessment.

Main Results:

• MicroRNA-6165 (miR-6165) was identified as a novel, differentially expressed miRNA in GC.
• Bioinformatics and luciferase assays confirmed STRN4 as a direct target of miR-6165.
• miR-6165 significantly suppressed gastric cancer cell migration and invasion by targeting STRN4 in vitro.
• Both miR-6165 and STRN4 demonstrated potential diagnostic and prognostic value in GC.

Conclusions:

• miR-6165 acts as a tumor suppressor in gastric cancer by targeting STRN4, inhibiting cell migration and invasion.
• Further research is warranted to explore the clinical utility of miR-6165 and STRN4 as diagnostic and prognostic biomarkers for gastric cancer patients.