Integrated Network Analysis Reveals FOXM1 and MYBL2 as Key Regulators of Cell Proliferation in Non-small Cell Lung Cancer

Area of Science:

• Oncology
• Bioinformatics
• Molecular Biology

Background:

• Uncontrolled cell division is crucial in non-small cell lung cancer (NSCLC) development.
• The precise molecular mechanisms and gene regulatory networks underlying NSCLC tumorigenesis remain incompletely understood.

Purpose of the Study:

• To employ a systems bioinformatics approach to uncover the "driver-network" implicated in NSCLC tumorigenic processes.
• To identify key regulatory elements controlling this network.

Main Methods:

• Meta-analysis of NSCLC gene expression data integrated with protein-protein interaction (PPI) data to build an NSCLC network.
• Utilized MCODE and iRegulon for identifying significant local clusters and their upstream transcription regulators (TFs).
• GEPIA for gene expression correlation analysis and Kaplan-Meier plots for survival analysis.

Main Results:

• A significant "driver-network" comprising 26 upregulated genes, primarily involved in cell proliferation, was identified.
• This network is regulated by transcription factors FOXM1 and MYBL2, along with microRNAs (miRNAs).
• Overexpression of genes within the "driver-network" and the identified TFs correlates with poorer overall survival in NSCLC patients.

Conclusions:

• A specific "driver-network" and its upstream regulators controlling cell proliferation in NSCLC have been identified.
• These findings suggest potential utility of the identified network and regulators as biomarkers and therapeutic targets for NSCLC.