Abstract
Background: Toxoplasmosis, which is caused by Toxoplasma gondii, is a widespread
parasitic disease that affects approximately one-third of the world's population. Due to the significant
side effects of anti-Toxoplasma drugs, it is necessary to acquire new drugs with low toxicity,
high activity, cheaper and more effective.
Objective: Earthworm has long been used as a therapeutic source of medicine in China and other
parts of the Far East. Therefore, the purpose of the present study was to investigate of antiparasitic
effects of Eisenia fetida extract against T. gondii in the Vero cell line.
Materials and Methods: The effects of the extract on the parasite, Vero cell, and the parasitized
cells were estimated by MTT assay in vitro. Apoptosis was also measured by flow cytometer in
three groups of extract-treated parasites, extract-treated Vero cells, and extract-treated parasitic Vero
cells, respectively.
Results: The inhibitory effect of E. fetida extract and sulfadiazine was more than 85% and 65% on
the parasite, respectively. Intracellular multiplication of the parasite in Vero cells during the 3 hours
test showed a significant decrease compared to the 1-hour test (p<0.05). Flow cytometric analysis
showed that with increasing concentration of E. fetida, apoptosis increased significantly (p<0.05).
Conclusion: The results showed that E. fetida extract in vitro could have a significant antiparasitic
effect against T. gondii.
Keywords:
Toxoplasma gondii, Eisenia fetida, sulfadiazine, cytotoxic activity, antiparasitic effect, in vitro.
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