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Application of chrysophanol in zebrafish to reduce dietary introduced lipid and its possible mechanism.

PURPOSE
To explore the therapeutic potential and mechanism of chrysophanol on lipid-lowering function.


METHODS
Zebrafish or larvae were employed to evaluate the effect of chrysophanol on lipid-lowering. Zebrafish of 5 day post fertilization (dpf, larva) and 13-week old were fed with high-cholesterol diet or high-fat to investigate the influence of chrysophanol comparing with atorvastain and co-administration of chrysophanol and atorvastain on subsistent blood lipid using the fluorescence microscope and lipid panel screen. Thereafter, we enrolled zebrafish of 7 dpf fed with high-fat diet to explore the lipid-lowering mechanism of chrysophanol basing on the frequency of peristalsis and the residual on the digestive wall.


RESULTS
Chrysophanol could significantly lower cholesterol both in zebrafish and larvae (P < 0.05), and the co-administration of chrysophanol and atorvastatin had the best performance in reducing cholesterol (P < 0.05). Chrysophanol and atorvastain could also significantly lower triglyceride. Moreover, we found that chrysophanol attached on the digestive wall for a long time and enhanced the frequency of peristalsis.


CONCLUSIONS
Chrysophanol has lipid-lowering effect both in zebrafish and larvae which may be attributed to the effect on the frequency of peristalsis and fat absorption, and co-administration with atorvastain performs better lipid-lowering effect in zebrafish.