Hsa_circ_0043278 functions as competitive endogenous RNA to enhance glioblastoma multiforme progression by sponging miR-638

Area of Science:

• Oncology
• Molecular Biology
• Genetics

Background:

• Circular RNAs (circRNAs) are implicated in disease pathogenesis, acting as competing endogenous RNAs (ceRNAs) or miRNA sponges.
• The specific role of has_circRNA_0043278 (circ_0043278) in glioblastoma multiforme (GBM) and its downstream targets remain largely uncharacterized.

Purpose of the Study:

• To investigate the function and mechanism of circ_0043278 in GBM pathogenesis.
• To identify potential therapeutic targets for GBM based on circ_0043278's role.

Main Methods:

• Validation of circ_0043278 expression in GBM cell lines and tissues.
• In vitro and in vivo experiments assessing the effects of circ_0043278 knockdown on GBM.
• Dual-luciferase reporter assays to confirm the interaction between circ_0043278 and miR-638.
• Analysis of HOXA9 expression and Wnt/β-catenin signaling pathway activation.

Main Results:

• Circ_0043278 was highly expressed in GBM.
• Knockdown of circ_0043278 inhibited GBM cell migration, proliferation, invasion, and in vivo tumorigenesis.
• Circ_0043278 directly sponged miR-638, leading to increased HOXA9 expression and Wnt/β-catenin pathway activation.
• Inhibition of miR-638 counteracted the effects of circ_0043278 silencing on GBM malignancy.

Conclusions:

• The circ_0043278/miR-638/HOXA9 axis plays a crucial role in promoting GBM progression.
• Circ_0043278 represents a potential diagnostic biomarker and therapeutic target for GBM.