Experimental Rodent Models of Metabolic Dysfunction-Associated Fatty Liver Disease: Present Status and Future Perspective
Abstract
1. Introduction
2. Methods
3. Pathogenesis
4. Animal Models of Liver Disease
4.1. Diet-Induced Models
4.1.1. High-Fat Diet (HFD) or Diet-Induced Obesity (DIO) Models
- Western diet (WD): typically, ~40% kcal from fat, with variable carbohydrate and cholesterol content.
- American lifestyle-induced obesity syndrome (ALIOS) diet: 45% kcal fat with 2% trans fats, often combined with fructose in drinking water.
- Amylin liver NASH (AMLN) diet: ~40% kcal fat (historically including 18% trans fats), 20% fructose, and 2% cholesterol.
- Gubra-Amylin NASH (GAN) diet: a trans fat–free version of AMLN (often using palm oil), developed following restrictions on trans fats [42].
4.1.2. High-Fat and High-Cholesterol Diet (HFHCh)
4.1.3. High-Fat, High-Fructose Diet (HFFD)
4.1.4. High-Fat, High-Fructose, and High-Cholesterol (HFFC) Diet
4.1.5. Methionine- and Choline-Deficient (MCD) Diet
4.1.6. Choline-Deficient, L-Amino Acid-Defined (CDAA) Diet
4.1.7. Choline-Deficient, L-Amino Acid-Defined, High-Fat (CDAHFD) Diet
4.2. Chemically Induced Models
4.2.1. Diethylnitrosamine (DEN)
4.2.2. Carbon Tetrachloride (CCl4)
4.2.3. Sodium Nitrite (NaNO2)
4.2.4. Lipopolysaccharides (LPS)
4.2.5. Streptozotocin (STZ) Models (STAM)
4.3. Genetically Modified Models
4.3.1. Leptin-Related Models (ob/ob and db/db)
- ob/ob mice carry a mutation preventing leptin synthesis and develop severe obesity and insulin resistance but typically show limited spontaneous hepatic inflammation and fibrosis.
- db/db mice lack functional leptin receptors and develop obesity, hyperglycemia, and liver injury, with phenotype severity influenced by genetic background (e.g., C57BL/6 vs. C57BLKS/J) [83].
4.3.2. KK-Ay Mice
4.3.3. Fatty Liver Shionogi (FLS) Mice
4.3.4. Diamond Mice
4.4. Immunity-Induced Models
4.5. Genetically Modified or Gene-Edited Models
5. Concluding Remarks
- Nutrient-deficiency diets (MCD and CDAA/CDAHFD): These diets induce rapid steatohepatitis and fibrosis but often fail to reproduce systemic metabolic abnormalities observed in human MAFLD/MASH (e.g., obesity and insulin resistance) [89].
- Species and strain differences: Alternative species such as hamsters, which express CETP and exhibit a lipoprotein metabolism more similar to humans, may offer improved metabolic fidelity compared with standard mouse and rat strains [93,94,95,96]. Within mice, substrain differences (e.g., C57BL/6J vs. C57BL/6N) should be explicitly considered when comparing outcomes and reproducibility.
Author Contributions
Funding
Institutional Review Board Statement
Informed Consent Statement
Data Availability Statement
Acknowledgments
Conflicts of Interest
References
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| Model | Species/Strain | Induction (Diet or Intervention) | Duration | Key Hepatic Pathology | Metabolic Features | Advantages | Limitations |
|---|---|---|---|---|---|---|---|
| HFD | Mouse (C57BL/6J) | ≥45% kcal fat | ≥16 weeks | Steatosis progressing to mild fibrosis | Obesity, insulin resistance | Simple, reproducible, widely used | Slow fibrosis progression |
| AMLN | Mouse (C57BL/6J) | 40% kcal fat + fructose + 2% cholesterol (w/w) | 20–30 weeks | Steatohepatitis with fibrosis | Obesity, insulin resistance | Closely mimics human MASH | Long induction period |
| GAN | Mouse (C57BL/6J) | AMLN-type diet without trans-fat | 20–30 weeks | Hepatocyte ballooning, fibrosis | Strong metabolic fidelity | Excellent clinical translatability | High cost |
| CDAHFD | Mouse | 60% kcal fat, choline-deficient, low methionine | 6–12 weeks | Rapid fibrosis and inflammation | Minimal obesity | Fast, highly reproducible | Non-physiological metabolic profile |
| MCD | Mouse/Rat | Methionine- and choline-deficient diet | 4–8 weeks | Severe steatohepatitis, inflammation | Weight loss, no insulin resistance | Rapid NASH induction | Poor metabolic relevance |
| STAM | Mouse | Neonatal streptozotocin + HFD | 10–20 weeks | NASH progression to HCC | Insulin deficiency | Tumor progression modeling | Does not reflect human insulin resistance |
| WD + CCl4 | Mouse | Western diet combined with CCl4 | 12–24 weeks | Advanced fibrosis, cirrhosis, HCC | Obesity | Accelerated disease progression | Hepatotoxicity |
| HFD | Rat (Wistar/SD) | 45–60% kcal fat | 12–24 weeks | Steatosis, inflammation, fibrosis | Obesity, insulin resistance, dyslipidemia | Larger liver size, easier sampling | Variable fibrosis severity |
| Atherogenic diet | Rat (SD) | High fat + 2–2.5% cholesterol (w/w) | 12–48 weeks | Steatohepatitis, fibrosis | Dyslipidemia, insulin resistance | Suitable for advanced MAFLD | Long duration |
| HSHF/High-sucrose diet | Rat (Wistar) | High sucrose ± fat | 14–20 weeks | Steatosis, inflammation, fibrosis | Obesity, metabolic dysregulation | Diet-relevant MAFLD model | Prolonged induction |
| HFHCh | Hamster (Golden Syrian) | High fat + cholesterol + fructose | 12–20 weeks | Steatohepatitis with fibrosis | CETP expression, dyslipidemia | Human-like lipid metabolism | Limited genetic tools |
| HFFCD | Hamster (Golden Syrian) | High fat, high fructose, high cholesterol | 6–16 weeks | Steatosis, inflammation | Obesity, dyslipidemia | Rapid induction, human-like lipid handling | Higher mortality risk |
| NASH diet | Hamster (Syrian) | ~40% kcal fat | ~12 months | Progressive steatohepatitis, fibrosis | Dyslipidemia | Histology similar to human NASH | Very long duration |
| Research Objective | Recommended Models | Preferred Species | Rationale |
|---|---|---|---|
| Early steatosis and insulin resistance | HFD, HFFD | Mouse, Rat | Robust metabolic phenotype with early hepatic steatosis; suitable for studying MAFLD initiation |
| Metabolic syndrome with MASH | GAN, AMLN | Mouse (primary), Hamster (lipid studies) | Best combined metabolic and histological fidelity to human MASH |
| Rapid fibrosis induction | CDAHFD, WD + CCl4 | Mouse | Consistent and advanced fibrosis within practical experimental timeframes |
| MASH to HCC progression | STAM, WD + CCl4, DEN-based combinations | Mouse | Reliable induction and acceleration of hepatocellular carcinoma |
| Preclinical drug screening | GAN, AMLN (fibrosis: CDAHFD) | Mouse; Hamster (lipid-targeted drugs) | High reproducibility with clinically relevant endpoints |
| Mechanistic genetic studies | ob/ob, db/db, Diamond | Mouse | Defined genetic alterations enabling targeted pathway interrogation |
| Immune-focused studies | Humanized immune models | Mouse | Enables assessment of human immune contributions and immunomodulatory therapies |
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Bhopale, K.K.; Srinivasan, M.P. Experimental Rodent Models of Metabolic Dysfunction-Associated Fatty Liver Disease: Present Status and Future Perspective. Livers 2026, 6, 45. https://doi.org/10.3390/livers6030045
Bhopale KK, Srinivasan MP. Experimental Rodent Models of Metabolic Dysfunction-Associated Fatty Liver Disease: Present Status and Future Perspective. Livers. 2026; 6(3):45. https://doi.org/10.3390/livers6030045
Chicago/Turabian StyleBhopale, Kamlesh K., and Mukund P. Srinivasan. 2026. "Experimental Rodent Models of Metabolic Dysfunction-Associated Fatty Liver Disease: Present Status and Future Perspective" Livers 6, no. 3: 45. https://doi.org/10.3390/livers6030045
APA StyleBhopale, K. K., & Srinivasan, M. P. (2026). Experimental Rodent Models of Metabolic Dysfunction-Associated Fatty Liver Disease: Present Status and Future Perspective. Livers, 6(3), 45. https://doi.org/10.3390/livers6030045

