New insights into NAFLD based on preclinical MRI studies

Area of Science:

• Biomedical Imaging
• Metabolic Diseases
• Radiology

Background:

• Non-alcoholic fatty liver disease (NAFLD) is a leading global cause of liver pathology.
• Accurate diagnosis and staging of NAFLD are crucial for patient prognosis.
• Obesity and NAFLD diagnosis require effective imaging techniques.

Purpose of the Study:

• To evaluate multiparametric MRI for whole-body fat imaging in obesity and NAFLD diagnosis.
• To establish MRI as a potential non-invasive biomarker for NAFLD.
• To assess MRI's utility in a preclinical model of diet-induced NAFLD.

Main Methods:

• Utilized Sprague Dawley male rats, divided into control and high-fat diet (HFD) groups.
• Administered HFD for 12 weeks to induce NAFLD.
• Employed multiparametric MRI (Dixon mode, DWI, T2-weighted imaging), serum TAG, liver histopathology, and GC-MS for fatty acid analysis.

Main Results:

• DWI showed decreased liver signal in HFD rats.
• Dixon imaging revealed increased liver fat and decreased water content in obese rats.
• Quantitative MRI analysis demonstrated significant whole-body fat profile changes, corroborated by histological and biochemical data.

Conclusions:

• Multiparametric MRI (DWI and Dixon) provides qualitative and quantitative data on whole-body fat distribution and liver adipose tissue.
• MRI is a promising, reliable, non-invasive translational biomarker for NAFLD.
• This study validates MRI's potential in a preclinical NAFLD model.