Idiopathic Pulmonary Fibrosis Molecular Substrates Revealed by Competing Endogenous RNA Regulatory Networks

Area of Science:

• Molecular Biology
• Systems Biology
• Pulmonary Medicine

Background:

• Idiopathic pulmonary fibrosis (IPF) is a progressive lung disease with limited treatment options.
• The roles of microRNAs (miRNAs) and circular RNAs (circRNAs) in IPF pathogenesis are not well understood.
• Understanding gene regulatory networks is crucial for identifying novel therapeutic strategies.

Purpose of the Study:

• To construct a messenger RNA (mRNA)-miRNA-circRNA competing endogenous RNA (ceRNA) regulatory network in IPF.
• To identify novel molecular signatures and potential therapeutic targets for IPF using systems biology approaches.

Main Methods:

• Utilized six gene expression datasets to identify differentially expressed genes (DEGs) and miRNAs (DEmiRNAs).
• Constructed protein-protein interaction, mRNA-miRNA, and miRNA-circRNA networks.
• Analyzed network modules and identified hub genes and potential therapeutic compounds via the Drug Gene Budger platform.

Main Results:

• Identified 724 common DEGs and 278 DEmiRNAs.
• Discovered key hub genes including TMPRSS4, ESR2, TP73, CLEC4E, and TP63 in the protein-protein interaction network.
• Revealed two significant mRNA-miRNA modules involving ADRA1A, ADRA1B, hsa-miR-484, CDH2, TMPRSS4, and hsa-miR-543, and proposed potential circRNA regulators.

Conclusions:

• The developed ceRNA network deepens the understanding of IPF molecular mechanisms.
• Identified molecular signatures and hub genes may serve as novel biomarkers for IPF diagnosis.
• The findings provide a foundation for developing innovative diagnostics and therapeutics for IPF.