Exploring Transcriptomic and MRI-Derived Parameters Correlations in NAFLD Fibrosis: Insights from a Rat Model

Area of Science:

• Hepatology
• Molecular Biology
• Biomedical Imaging

Background:

• Nonalcoholic fatty liver disease (NAFLD) affects 25% of adults, contributing significantly to liver disease morbidity and mortality.
• Molecular mechanisms of NAFLD-related liver fibrosis are not fully understood.
• Limited research integrates transcriptomic data with MRI parameters for NAFLD fibrosis.

Purpose of the Study:

• To develop an animal model for NAFLD-related liver fibrosis.
• To integrate transcriptomics and MRI techniques to explore fibrosis mechanisms.
• To correlate molecular mechanisms with MRI-derived parameters.

Main Methods:

• Utilized 24 Sprague-Dawley rats to model non-advanced and advanced NAFLD fibrosis.
• Employed RNA sequencing and weighted gene co-expression network analysis to identify fibrosis-associated genes.
• Performed MRI scans (T2, T2*, R2*, proton density fat fraction) and correlated findings with gene expression data.

Main Results:

• Identified 11 hub genes (e.g., Loc100365810, Acin1, Clk2) in NAFLD fibrosis.
• Validated differential expression of KDM4A, DNASE1L3, and Eif5a between fibrosis stages.
• Discovered significant associations between hub genes and MRI parameters, highlighting roles in apoptosis and metabolic pathways.

Conclusions:

• Preliminary identification of hub genes and metabolic pathways linked to NAFLD fibrosis stages.
• Suggests potential correlations between molecular markers and MRI parameters for non-invasive diagnostics.
• Emphasizes the need for further validation in larger cohorts and human samples for clinical relevance.