FRK exerts oncogenic effects by targeting NQO2 via exosomal miR-9-3p to regulate mitochondrial function

Area of Science:

• Oncology
• Molecular Biology
• Cell Biology

Background:

• Fyn-related kinase (FRK) is implicated in non-small cell lung cancer (NSCLC) progression and metabolism.
• The precise molecular mechanisms, particularly the role of exosomes, remain to be fully elucidated.

Purpose of the Study:

• To investigate the role of exosomes in FRK-mediated NSCLC progression.
• To identify key molecular mediators, such as microRNAs, involved in this process.
• To explore the downstream targets and functional consequences on cancer cell metabolism and mitochondrial function.

Main Methods:

• Isolation and co-culture of exosomes from FRK-knockout (KO) and control NSCLC cells.
• MicroRNA (miRNA) sequencing to identify exosomal miRNAs.
• Application of miRNA and exosome inhibitors (GW4869) in co-culture systems.
• Assessment of cell proliferation, metastasis, metabolism, and mitochondrial function.
• Analysis of potential target gene NQO2 expression and function.

Main Results:

• Exosomes from FRK-KO cells negatively impacted NSCLC cell proliferation, metastasis, metabolism, and mitochondrial function.
• Exosomal miR-9-3p was identified as a key mediator.
• Inhibition of miR-9-3p or exosome release attenuated the malignant phenotype and mitochondrial dysfunction.
• NQO2 was identified as a potential target of exosomal miR-9-3p, involved in regulating mitochondrial function.

Conclusions:

• FRK promotes NSCLC malignant progression and metabolic reprogramming via exosomal miR-9-3p.
• This pathway involves targeting NQO2 to enhance mitochondrial function.
• Exosomal miR-9-3p represents a novel therapeutic target for NSCLC.