A Systematic Review of Animal Models of NAFLD Finds High-Fat, High-Fructose Diets Most Closely Resemble Human NAFLD

Background and Aims Animal models of human disease are a key component of translational hepatology research, yet there is no consensus on which model is optimal for NAFLD. Approach and Results We generated a database of 3,920 rodent models of NAFLD. Study designs were highly heterogeneous, and therefore, few models had been cited more than once. Analysis of genetic models supported the current evidence for the role of adipose dysfunction and suggested a role for innate immunity in the progression of NAFLD. We identified that high-fat, high-fructose diets most closely recapitulate the human phenotype of NAFLD. There was substantial variability in the nomenclature of animal models: a consensus on terminology of specialist diets is needed. More broadly, this analysis demonstrates the variability in preclinical study design, which has wider implications for the reproducibility of in vivo experiments both in the field of hepatology and beyond. Conclusions This systematic analysis provides a framework for phenotypic assessment of NAFLD models and highlights the need for increased standardization and replication.

Automated summary

The study found that high-fat, high-fructose diets most closely replicate the human phenotype of NAFLD, and genetic models support the role of adipose dysfunction and innate immunity in NAFLD progression. There is substantial variability in the nomenclature of animal models, highlighting the need for consensus on specialist diet terminology.