title: Antiprotozoal, antimycobacterial and cytotoxic potential of some british green algae.
abstract: In the continuation of our search for natural sources for antiprotozoal and antitubercular molecules, we have screened the crude extracts of four green marine algae (Cladophora rupestris, Codium fragile ssp. tomentosoides, Ulva intestinalis and Ulva lactuca) collected from the Dorset area of England. Trypanosoma brucei rhodesiense, Trypanosoma cruzi, Leishmania donovani and Mycobacterium tuberculosis were used as test organisms in the in vitro assays. The selective toxicity of the extracts was also determined toward mammalian skeletal myoblast (L6) cells. The crude seaweed extracts had no activity against M. tuberculosis, but showed antiprotozoal activity against at least two protozoan species. All algal extracts were active against T. brucei rhodesiense, with C. rupestris being the most potent one (IC(50) value 3.7 microg/ml), whilst only C. rupestris and U. lactuca had moderate trypanocidal activity against T. cruzi (IC(50) values 80.8 and 34.9 microg/ml). Again, all four extracts showed leishmanicidal activity with IC(50) values ranging between 12.0 and 20.2 microg/ml. None of the extracts showed cytotoxicity toward L6 cells, indicating that their antiprotozoal activity is specific. This is the first study reporting antiprotozoal and antimycobacterial activity of British marine algae.
authors: Department of Pharmaceutical and Biological Chemistry, Centre for Pharmacognosy and Phytotherapy, School of Pharmacy, University of London, London WC1N 1AX, UK.
authors: Jasmine
authors: J
authors: Spavieri
authors: Marcel
authors: M
authors: Kaiser
authors: Rosalyn
authors: R
authors: Casey
authors: Suzie
authors: S
authors: Hingley-Wilson
authors: Ajit
authors: A
authors: Lalvani
authors: Gerald
authors: G
authors: Blunden
authors: Deniz
authors: D
authors: Tasdemir
mesh_terms: D000818:Animals; D000900:Anti-Bacterial Agents / Q000302:isolation & purification / Q000494:pharmacology*; D000981:Antiprotozoal Agents / Q000302:isolation & purification / Q000494:pharmacology*; D002460:Cell Line; D000460:Chlorophyta / Q000737:chemistry*; D004739:England; D020128:Inhibitory Concentration 50; D007893:Leishmania donovani / Q000187:drug effects; D009169:Mycobacterium tuberculosis / Q000187:drug effects; D010936:Plant Extracts / Q000494:pharmacology*; D051381:Rats; D018675:Toxicity Tests; D014345:Trypanosoma / Q000187:drug effects
chemical_list: D000900:Anti-Bacterial Agents; D000981:Antiprotozoal Agents; D010936:Plant Extracts