Turkish Freshwater and Marine Macrophyte Extracts Show in Vitro Antiprotozoal Activity and Inhibit Fabi, A Key Enzyme of Plasmodium Falciparum Fatty Acid Biosynthesis. - Phytomedicine: International Journal of Phytotherapy & Phytopharmacology

Turkish Freshwater and Marine Macrophyte Extracts Show in Vitro Antiprotozoal Activity and Inhibit Fabi, A Key Enzyme of Plasmodium Falciparum Fatty Acid Biosynthesis.

By Phytomedicine: International Journal of Phytotherapy & Phytopharmacology

  • Category Genre: Life Sciences
  • Release Date: 2006-06-01
  • Author: Phytomedicine: International Journal of Phytotherapy & Phytopharmacology
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Turkish Freshwater and Marine Macrophyte Extracts Show in Vitro Antiprotozoal Activity and Inhibit Fabi, A Key Enzyme of Plasmodium Falciparum Fatty Acid Biosynthesis. by Phytomedicine: International Journal of Phytotherapy & Phytopharmacology read book description online

Abstract The ethanolic extracts of a number of Turkish freshwater macrophytes (Potamogeton perfoliatus, Ranunculus tricophyllus and Cladophora glomerata) and marine macroalgae (Dictyota dichotoma, Halopteris scoparia, Posidonia oceanica, Scinaia furcellata, Sargassum natans and Ulva lactuca) were assayed for their in vitro antiprotozoal activity. Trypanosoma brucei rhodesiense, Trypanosoma cruzi, Leishmania donovani and Plasmodium falciparum were used as test organisms. The cytotoxicity of the extracts was also assessed against primary rat skeletal myoblasts (L6 cells). Whereas none of the extracts were active against T. cruzi, all crude extracts displayed appreciable trypanocidal activity against T. brucei rhodesiense, with S. natans being the most active one (I[C.sub.50] 7.4 [micro]g/ml). Except for the marine alga H. scoparia, all extracts also possessed leishmanicidal potential. The best antileishmanial activity was exerted by U. lactuca and P. oceanica (I[C.sub.50]'s 5.9 and 8.0 [micro]g/ml, respectively). Five extracts that demonstrated inhibitory activity towards P. falciparum (I[C.sub.50]'s 18.1-48.8 [micro]g/ml) were simultaneously assayed against FabI, a crucial enzyme of the fatty acid system of P. falciparum, to find out whether FabI was their target. The extracts of C. glomerata and U. lactuca efficiently inhibited the FabI enzyme with I[C.sub.50] values of 1.0 and 4.0 [micro]g/ml, respectively. None of the extracts were cytotoxic towards mammalian L6 cells. This work reports for the first time antiprotozoal activity of some Turkish marine and freshwater algae, as well as a target-based antiplasmodial screening for the identification of P. falciparum FabI inhibitors from aquatic and marine macrophytes.

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