miR-338-3p suppresses neuroblastoma proliferation, invasion and migration through targeting PREX2a

Area of Science:

• Molecular Biology
• Oncology
• Gene Regulation

Background:

• MicroRNAs (miRNAs) are crucial regulators of cancer cell proliferation and metastasis.
• Dysregulation of specific miRNAs is implicated in various cancers, including neuroblastoma.

Purpose of the Study:

• To investigate the role of miR-338-3p in neuroblastoma.
• To identify the molecular targets and pathways regulated by miR-338-3p in cancer progression.

Main Methods:

• Quantitative analysis of miR-338-3p expression in primary and metastatic neuroblastoma tissues.
• In vitro assays to assess the effects of miR-338-3p on cell proliferation, cell cycle, migration, and invasion.
• Identification and validation of PREX2a as a direct target of miR-338-3p.
• Western blot analysis to examine the PTEN/Akt signaling pathway.

Main Results:

• miR-338-3p was significantly down-regulated in metastatic neuroblastoma tissues compared to primary tumors.
• Overexpression of miR-338-3p inhibited neuroblastoma cell proliferation, induced cell cycle arrest, and suppressed cell migration and invasion.
• PREX2a was identified as a direct target of miR-338-3p, and its knockdown mimicked the effects of miR-338-3p.
• miR-338-3p suppressed the PTEN/Akt pathway by down-regulating PREX2a, and this effect was reversed by PREX2a overexpression.

Conclusions:

• miR-338-3p acts as a tumor suppressor in neuroblastoma by inhibiting proliferation and metastasis.
• The miR-338-3p/PREX2a axis regulates the PTEN/Akt pathway, offering a potential therapeutic target for neuroblastoma.