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Standardized Modeling Platform for Alcohol-Induced Liver Injury: Recreating Alcohol-Related Hepatotoxicity and Efficiently Evaluating Hepatoprotective Efficacy

　　Alcoholic liver disease (ALD) refers to a group of hepatic metabolic disorders caused by alcohol consumption. In its early stages, it typically manifests as alcoholic fatty liver; if left untreated, it may progress to more severe conditions such as alcoholic hepatitis, hepatic fibrosis, cirrhosis, and even hepatocellular carcinoma.

　　Animal experimentation is an essential approach for investigating disease therapies, and stable, reliable, and reproducible animal models are indispensable prerequisites for conducting such studies.

　　Alcoholic liver injury models can be classified into acute liver injury animal models and chronic alcoholic liver injury models.

　　Animal model of acute alcoholic liver injury

　　| Experimental animals: rats or mice

　　| Experimental Protocol:

　　Healthy male Wistar or SD rats were used. They were administered 56° baijiu by gavage at a dose of 7 mL/kg, twice daily—once in the morning and once in the evening—for one week. Throughout the experiment, the animals had free access to water and were fed a standard diet.

　　Advantages: The model mimics the human pattern of alcohol consumption, exhibits low mortality, and requires a short modeling duration.

　　Drawbacks: It is impossible to estimate the absorption rate, and it can only cause a mild increase in serum ALT and AST levels.

　　Applicable to: Mechanistic studies of the acute onset of alcoholic liver injury.

　　Animal model of chronic alcoholic liver injury

　　Case Study of the Aniphe BioLab Chronic Alcoholic Liver Injury Mouse Model

　　| Experimental animals: 10–12-week-old male C57 mice

　　| Experimental Protocol:

　　① Prepare the feed in liquid form and add alcohol, gradually increasing the alcohol concentration over one week as follows: 1% → 2% → 3% → 4%.

　　② After one week, the alcohol concentration was increased to 5%; following 14 days of chronic alcohol consumption, a high‑concentration acute gavage (at a dose of 5 g/kg body weight) administered on the final day of model induction can induce alcoholic liver injury in mice.

　　| Experimental Evaluation System:

　　1. Serum biochemical assays for ALT, AST, and TG levels 2. Serum biochemical assays for ALT, AST, and TG levels 3. Liver coefficient 4. Liver oil red O staining and liver H&E staining 1

　　| Experimental Results:

　　① Pathological tissue:

　　

 

　　Image source: Aniphe BioLab

　　② Liver coefficient and biochemical results:

　　In the model group, the liver coefficient was significantly increased, and the levels of TG, ALT, and AST were markedly elevated.

　　

 

　　Image source: Aniphe BioLab

　　③ Oil Red O staining results

　　In the model group, red-stained large lipid droplets were observed within hepatocytes, with a widespread distribution, and marked hepatic steatosis was evident.

　　

 

　　Image source: Aniphe BioLab

　　④ Results of HE staining

　　In the model group, mice exhibited marked hepatocyte enlargement, disorganized cellular arrangement, and the presence of irregular lipid vacuoles.

　　

 

　　Image source: Aniphe BioLab

　　This indicates that the alcoholic liver injury model has been successfully established.

　　|Precautions

　　01. In this experiment, the feed is prepared in liquid form; it is best to replace the feed daily. Any excess can be stored at 4°C in a sealed container for up to one week.

　　02. Alcohol affects food intake; if animals exhibit poor condition or mortality, the concentration is recommended to be maintained at 4% or lower.

　　03. To exacerbate fatty liver and hepatic injury, a single high-concentration alcohol gavage may be administered on the final day of model induction.

　　This modeling method is simple and highly reproducible, enabling the simulation of the pathogenesis of alcoholic hepatitis in humans. It is characterized by a marked elevation in serum ALT levels, pronounced hepatic steatosis and inflammation, prominent neutrophil infiltration in the liver, and elevated blood alcohol concentrations, thereby providing an ideal experimental paradigm for investigating the underlying mechanisms of alcoholic liver disease and evaluating the hepatoprotective effects of therapeutic agents.

　　Summary

　　With the improvement of living standards in the current era, the incidence of alcoholic liver disease has been increasing year by year. Selecting an appropriate model of alcoholic liver injury (ALD) that aligns with the research objectives is crucial for elucidating its pathogenic mechanisms and advancing clinical diagnosis and treatment. Aniphe BioLab offers multiple approaches to establish ALD models and provides pharmacological and efficacy evaluation services tailored to related disease models. We welcome all clients to contact us for more information!

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