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Rapid Evaluation of Toxicity of Chemical Compounds Using Zebrafish Embryos
Published on: August 25, 2019
Toxicity induced by emodin on zebrafish embryos
Qiuxia He1, Kechun Liu, Sifeng Wang
1Biology Institute of Shandong Academy of Sciences, Jinan, Shandong, China.
Drug and Chemical Toxicology
|August 13, 2011
Summary
Emodin, a herbal remedy, showed toxicity in zebrafish embryos, impairing survival and development. Gene expression analysis revealed involvement of drug metabolism (CYP3A) and drug resistance (MDR1) pathways in these toxic effects.
Area of Science:
- Developmental toxicology
- Pharmacology
- Zebrafish model systems
Background:
- Emodin is a widely available herbal remedy with diverse pharmacological actions.
- Understanding the safety profile of herbal remedies is crucial for clinical applications.
Purpose of the Study:
- To evaluate the potential toxic effects of emodin on zebrafish (Danio rerio) embryo development.
- To investigate the underlying molecular mechanisms, including the involvement of drug-metabolism and drug-resistance genes.
Main Methods:
- Zebrafish embryos were exposed to varying concentrations of emodin (0.1-2 μg/mL) from 7 hours post-fertilization.
- Embryo survival, hatching success, and morphological abnormalities were assessed.
- mRNA levels of drug-metabolism genes (CYP3A) and a multiple drug-resistance gene (MDR1) were quantified using reverse-transcript polymerase chain reaction.
Main Results:
- Emodin concentrations of 0.25 μg/mL and higher significantly reduced embryo survival and hatching success.
- Exposure to emodin resulted in developmental abnormalities, including edema and trunk malformations.
- Increased mRNA accumulation of CYP3A and MDR1 genes was observed in emodin-treated embryos.
Conclusions:
- Emodin exhibits toxicity towards zebrafish embryos, negatively impacting development and organ morphogenesis even at low concentrations.
- The drug-metabolism gene CYP3A and the multiple drug-resistance gene MDR1 are implicated in the toxic effects of emodin.
- These findings highlight the potential risks associated with emodin exposure during early developmental stages.
