Western Diet-Induced Nonalcoholic Fatty Liver Disease Mice Mimic the Key Transcriptomic Signatures Observed in...

Area of Science:

• Hepatology
• Translational Medicine
• Bioinformatics

Background:

• Nonalcoholic fatty liver disease (NAFLD) is a growing global health concern.
• Animal models are crucial for NAFLD research but their human relevance needs validation.
• Gene expression analysis can assess the translational utility of animal models.

Purpose of the Study:

• To evaluate the relevance of Western diet-induced NAFLD mouse models to human NAFLD.
• To identify conserved gene co-expression networks between mouse and human NAFLD.

Main Methods:

• Weighted gene co-expression network analysis (WGCNA) was applied to liver tissues from NAFLD mice.
• Module preservation analysis was used to compare mouse and human gene expression datasets.
• Functional enrichment analysis identified key biological processes.

Main Results:

• Nineteen modules associated with NAFLD progression were identified in mice.
• A "brown" module strongly correlated with disease severity and showed enrichment for inflammatory responses.
• This "brown" module's gene co-expression network was highly preserved in human NAFLD liver samples.

Conclusions:

• Western diet-induced NAFLD mouse models exhibit conserved gene co-expression networks with human NAFLD, particularly for inflammatory pathways.
• These findings support the utility of this animal model for preclinical NAFLD research.
• The study highlights the importance of gene co-expression network analysis for validating translational models.