MiR-92 suppresses proliferation and induces apoptosis by targeting EP4/Notch1 axis in gastric cancer

Area of Science:

• Oncology
• Molecular Biology
• Genetics

Background:

• MicroRNA-92a (miR-92a) is implicated in various cancers, with a complex role in carcinogenesis.
• Understanding miR-92a's specific function and regulatory network in gastric cancer is crucial for therapeutic development.

Purpose of the Study:

• To investigate the functional role of miR-92a in gastric cancer.
• To identify the regulatory pathways associated with miR-92a in this disease.

Main Methods:

• Analysis of miR-92a expression in gastric cancer tissues and plasma.
• Assessment of miR-92a's effect on cell proliferation, invasion, and apoptosis in vitro.
• Evaluation of miR-92a's impact on tumor growth using a xenograft model.
• Identification of target genes regulated by miR-92a, including EP4 and Notch 1.
• Investigation of the relationship between miR-92a and NF-κB signaling.

Main Results:

• MiR-92a expression was underexpressed in gastric cancer tissues, with an AUC of 0.78.
• Low plasma miR-92a levels correlated with increased promoter DNA methylation.
• Overexpression of miR-92a suppressed cell proliferation and invasion, and induced apoptosis.
• MiR-92a reduced tumor growth in vivo.
• EP4 and Notch 1 were identified as targets negatively regulated by miR-92a.
• NF-κB expression was inversely correlated with miR-92a and suppressed miR-92a expression.

Conclusions:

• MiR-92a exhibits a tumor-suppressive role in gastric cancer.
• The tumor-suppressive function involves the EP4/Notch 1 signaling pathway.
• NF-κB negatively regulates miR-92a, contributing to gastric carcinogenesis.
• Targeting miR-92a and its associated pathways may offer novel therapeutic strategies for gastric cancer.