Long Non-coding RNA ASNR Targeting miR-519e-5p Promotes Gastric Cancer Development by Regulating FGFR2

Area of Science:

• Molecular Oncology
• Cancer Biology
• RNA Therapeutics

Background:

• Gastric cancer (GC) is a leading cause of cancer mortality worldwide.
• Long non-coding RNAs (lncRNAs) are increasingly recognized for their roles in cancer, but their specific functions in GC remain largely unexplored.
• Understanding the molecular mechanisms underlying GC progression is crucial for developing effective therapeutic strategies.

Purpose of the Study:

• To investigate the clinical significance, biological function, and underlying mechanism of Lnc_ASNR (apoptosis suppressing-non-coding RNA) in gastric cancer.
• To elucidate the regulatory network involving Lnc_ASNR, miR-519e-5p, and fibroblast growth factor receptor 2 (FGFR2) in GC.
• To determine the role of Lnc_ASNR in GC cell proliferation, migration, invasion, and epithelial-mesenchymal transition (EMT).

Main Methods:

• Quantitative real-time PCR (qRT-PCR) to assess Lnc_ASNR expression in GC tissues and cells.
• Cell-based assays including MTT, flow cytometry, wound healing, and Transwell assays to evaluate proliferation, cell cycle, migration, and invasion.
• Luciferase reporter assays, bioinformatics analysis, and Western blot to confirm interactions between Lnc_ASNR, miR-519e-5p, and FGFR2.

Main Results:

• Lnc_ASNR was significantly upregulated in GC tissues and cells.
• Downregulation of Lnc_ASNR suppressed GC cell proliferation, migration, and invasion, while its upregulation promoted these processes.
• Lnc_ASNR acted as a competing endogenous RNA (ceRNA), inhibiting miR-519e-5p and consequently increasing FGFR2 expression, thereby promoting GC development and EMT.

Conclusions:

• Lnc_ASNR plays a critical oncogenic role in gastric cancer progression.
• The miR-519e-5p/FGFR2 pathway is a key mechanism through which Lnc_ASNR exerts its effects on GC.
• Lnc_ASNR represents a potential therapeutic target for gastric cancer treatment.