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Published on: November 8, 2014
Zebrafish: An emerging model system to study liver diseases and related drug discovery
Swati Katoch1, Vikram Patial1,2
1Pharmacology and Toxicology Laboratory, Food and Nutraceuticals Division, CSIR-Institute of Himalayan Bioresource Technology, Palampur, India.
Abstract:
The zebrafish has emerged as a powerful vertebrate model for studying liver-associated disorders. Liver damage is a crucial problem in the process of drug development and zebrafish have proven to be an important tool for the high-throughput screening of drugs for hepatotoxicity. Although the structure of the zebrafish liver differs to that of mammals, the fundamental physiologic processes, genetic mutations and manifestations of pathogenic responses to environmental insults exhibit much similarity. The larval transparency of the zebrafish is a great advantage for real-time imaging in hepatic studies. The zebrafish has a broad spectrum of cytochrome P450 enzymes, which enable the biotransformation of drugs via similar pathways as mammals, including oxidation, reduction and hydrolysis reactions. In the present review, we appraise the various drugs, chemicals and toxins used to study liver toxicity in zebrafish and their similarities to the rodent models for liver-related studies. Interestingly, the zebrafish has also been effectively used to study the pathophysiology of nonalcoholic and alcoholic fatty liver disease. The genetic models of liver disorders and their easy manipulation provide great opportunity in the area of drug development. The zebrafish has proven to be an influential model for the hepatic system due to its invertebrate-like advantages coupled with its vertebrate biology. The present review highlights the pivotal role of zebrafish in bridging the gap between cell-based and mammalian models.
Insights
Zebrafish are valuable vertebrate models for studying liver disease and drug-induced liver injury, offering advantages for high-throughput screening. Their physiological similarities to mammals and unique features like larval transparency make them ideal for hepatic research and drug development.
Area of Science:
- Comparative Medicine
- Toxicology
- Drug Development
Background:
- Liver damage is a significant concern in drug development, necessitating effective screening models.
- Zebrafish (Danio rerio) offer a unique combination of vertebrate biology and practical advantages for liver research.
- Despite structural differences, zebrafish share fundamental physiological processes and disease manifestations with mammals.
Purpose of the Study:
- To review the utility of zebrafish as a model for studying liver-associated disorders and drug-induced hepatotoxicity.
- To compare zebrafish models with traditional rodent models in liver-related studies.
- To highlight the role of zebrafish in advancing drug development and understanding liver pathophysiology.
Main Methods:
- Review of existing literature on zebrafish models for liver toxicity and disease.
- Analysis of zebrafish cytochrome P450 enzyme activity in drug metabolism.
- Comparison of zebrafish and rodent models for hepatic studies.
- Examination of genetic zebrafish models for liver disorders.
Main Results:
- Zebrafish effectively model various liver conditions, including nonalcoholic and alcoholic fatty liver disease.
- Larval zebrafish transparency facilitates real-time imaging of hepatic responses.
- Zebrafish possess cytochrome P450 enzymes that metabolize drugs similarly to mammals.
- Genetic manipulation in zebrafish provides opportunities for disease modeling and drug screening.
Conclusions:
- Zebrafish serve as a powerful, versatile model for high-throughput screening of drug hepatotoxicity.
- They bridge the gap between simpler cell-based assays and complex mammalian models.
- Zebrafish research significantly contributes to drug development and understanding liver pathophysiology.
