Long Non-Coding RNA CTD-2245E15.3 Drives Proliferation and Migration in Gastrointestinal Stromal Tumors

Area of Science:

• Oncology
• Molecular Biology
• Genetics

Background:

• Long non-coding RNAs (lncRNAs) are implicated in cancer development.
• Gastrointestinal stromal tumors (GISTs) often develop resistance to tyrosine kinase inhibitors (TKIs).
• Identifying novel therapeutic targets like lncRNAs is crucial for GIST treatment.

Purpose of the Study:

• To identify and characterize novel lncRNAs involved in GIST tumorigenesis.
• To investigate the functional role of CTD-2245E15.3 in GIST cell behavior.
• To assess the prognostic value of CTD-2245E15.3 in GIST patients.

Main Methods:

• Transcriptome sequencing of GIST tissues and adjacent normal tissues.
• High-content screening (HCS) to identify proliferation-associated lncRNAs.
• Loss-of-function experiments (siRNA, shRNA) and in vitro assays (CCK-8, colony formation, Transwell).
• In situ hybridization (ISH) on 507 GIST specimens for survival analysis.

Main Results:

• Differential expression of 2924 upregulated and 2629 downregulated lncRNAs in GIST.
• CTD-2245E15.3 knockdown significantly inhibited GIST cell proliferation, migration, and colony formation.
• CTD-2245E15.3 silencing increased GIST cell apoptosis.
• High CTD-2245E15.3 expression correlated with adverse clinicopathological features and poorer progression-free and overall survival.

Conclusions:

• CTD-2245E15.3 promotes GIST cell proliferation and migration.
• CTD-2245E15.3 serves as a potential diagnostic biomarker and therapeutic target for GIST.
• Targeting CTD-2245E15.3 may offer a novel strategy for GIST treatment.