Abstract
Purpose
We explore the use of intravenously delivered perfluorocarbon (PFC) nanoemulsion and 19F MRI for detecting inflammation in a mouse model of non-alcoholic fatty liver disease (NAFLD). Correlative studies of 1H-based liver proton density fat fraction (PDFF) and T1 measurements and histology are also evaluated.
Procedures
C57BL/6 mice were fed standard or high-fat diet (HFD) for 6 weeks to induce NAFLD. 1H MRI measurements of PDFF and T1 relaxation time were performed at baseline to assess NAFLD onset prior to administration of a PFC nanoemulsion to enable 19F MRI of liver PFC uptake. 1H and 19F MRI biomarkers were acquired at 2, 21, and 42 days post-PFC to assess changes. Histopathology of liver tissue was performed at experimental endpoint.
Results
Significant increases in liver volume, PDFF, and total PFC uptake were noted in HFD mice compared to Std diet mice. Liver fluorine density and T1 relaxation time were significantly reduced in HFD mice.
Conclusions
We demonstrated longitudinal quantification of multiple MRI biomarkers of disease in NAFLD mice. The changes in liver PFC uptake in HFD mice were compared with healthy mice that suggests that 19F MRI may be a viable biomarker of liver pathology.
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Data Availability
Data that support the findings of this study are available from the corresponding author upon reasonable request.
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Acknowledgements
We thank Hongyan Xu for biology assistance and Benjamin Leach for critical reading of the manuscript.
Funding
Funding for ETA was provided by National Institutes of Health (NIH) grants R01-EB024015, R01-CA139579, and Bristol-Meyers Squibb.
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D.L. conducted animal studies, collected and analyzed MRI data, and wrote initial draft. G.B. performed pulse sequence development, data analysis, and helped write draft. M.H. was responsible for histopathological analyses and manuscript editing. K.M. assisted with statistical analyses. J.W. provided experimental design and edited the manuscript. C.S. helped analyze data and write manuscript. E.A. conceptualized project, assisted with MRI experiments, and wrote final copy of manuscript.
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Lister, D., Blizard, G., Hosseini, M. et al. Imaging Non-alcoholic Fatty Liver Disease Model Using H-1 and F-19 MRI. Mol Imaging Biol 25, 443–449 (2023). https://doi.org/10.1007/s11307-022-01798-y
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DOI: https://doi.org/10.1007/s11307-022-01798-y