5 years ago

In Vitro Activity of the Interaction between Taxifolin (dihydroquercetin) and Pyrimethamine against Toxoplasma gondii

In Vitro Activity of the Interaction between Taxifolin (dihydroquercetin) and Pyrimethamine against Toxoplasma gondii
William H. Witola, Roberta M. Troy, Daniel A. Abugri, Albert E. Russell
Toxoplasmosis is one of the most neglected zoonotic foodborne parasitic diseases that cause public health and socio-economic concern worldwide. The current drugs used for the treatment of toxoplasmosis have been identified to have clinical limitations. Hence, new drugs are urgently needed to eradicate T.gondii infections globally. Here, an in vitro anti-Toxoplasma gondii activity of taxifolin (dihydroquercetin) and dihydrofolate inhibitor (pyrimethamine) alone and in combination with a fixed concentration of pyrimethamine were investigated against the rapidly proliferating T.gondii RH strain at 48 h using colorimetric Assay. Pyrimethamine showed the highest anti-T. gondii activity with IC50P of 0.84 μg/mL (p ˃ 0.05) respectively. The combination of pyrimethamine with dihydroquercetin gave a significant inhibitory activity against tachyzoites in in vitro with IC50p of 1.39 μg/mL (p ˂ 0.05). The IC50p ranges obtained for the individual and the combination of taxifolin with pyrimethamine inhibition of parasite growth were not cytotoxic to the infected HFF and Hek-293 cell lines used. These compounds combination should be investigated further using in vivo model of toxoplasmosis. This article is protected by copyright. All rights reserved. The combination of taxifolin and a fixed concentration of pyrimethamine had effective anti-T.gondii activity in in vitro than Taxifolin alone with IC50s of 1.39µg/ml and 6.84µg/ml respectivelyA combination of taxifolin and pyrimethamine have no cytotoxic effect on human fibroblast cell lines at IC50s that inhibits T.gondii tachyzoites in in vitro

Publisher URL: http://onlinelibrary.wiley.com/resolve/doi

DOI: 10.1111/cbdd.13070

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