Gene Expression Changes in Rats Fed Comfrey
Author Information
Author(s): Mei Nan, Guo Lei, Zhang Lu, Shi Leming, Sun Yongming Andrew, Fung Chris, Moland Carrie L, Dial Stacey L, Fuscoe James C, Chen Tao
Primary Institution: National Center for Toxicological Research, FDA
Hypothesis
Comfrey induces liver tumors through a genotoxic mechanism.
Conclusion
The study provides insights into the mechanisms of comfrey-induced liver toxicity and tumorigenesis.
Supporting Evidence
- 2,726 genes were identified as differentially expressed in comfrey-fed rats compared to control animals.
- Comfrey treatment resulted in significant decreases in body weight and increases in liver mutant frequency.
- Gene expression changes were associated with metabolism, endothelial cell injury, and liver abnormalities.
Takeaway
Rats that ate comfrey had changes in their liver genes, which could lead to liver damage and cancer.
Methodology
Rats were fed a diet containing 8% comfrey roots for 12 weeks, and gene expression was analyzed using a microarray.
Potential Biases
Potential bias due to the use of a specific strain of rats and the controlled diet.
Limitations
The study was conducted on a small sample size of male transgenic rats, which may limit the generalizability of the findings.
Participant Demographics
Male Big Blue transgenic rats.
Statistical Information
P-Value
0.01
Statistical Significance
p<0.01
Digital Object Identifier (DOI)
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