Screening of marine extracts for schistosomicidal activity in vitro. Isolation of the triterpene glycosides echinosides A and B with potential activity from the Sea Cucumbers Actinopyga echinites and Holothuria polii
| Autor: | Yousif F, Menerva Tadros, M. A. Selim, Farouk R. Melek, Marwa H Hassan |
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| Rok vydání: | 2011 |
| Předmět: |
Magnetic Resonance Spectroscopy
Sea Cucumbers Pharmaceutical Science Context (language use) Microbiology Schistosomicides parasitic diseases Drug Discovery medicine Bioassay Animals Holothuria Schistosoma Pharmacology chemistry.chemical_classification Chromatography biology Molecular Structure Methanol Glycoside General Medicine Schistosoma mansoni biology.organism_classification Holothurin Praziquantel Complementary and alternative medicine chemistry Solvents Molecular Medicine Holothuriidae Biological Assay medicine.drug |
| Zdroj: | Pharmaceutical biology. 50(4) |
| ISSN: | 1744-5116 |
| Popis: | Praziquantel (PZQ) is the drug available for the treatment of schistosomiasis. The reported reduced cure rates, the failure of treatment after PZQ administration in patients and the existence of resistant parasite strains, reinforce the need to rapidly discover new effective molecules against Schistosoma parasite.To screen the methanol extracts of 79 marine organisms for their schistosomicidal activities against Schistosoma mansoni adult worms in vitro and perform bio-assay directed chromatography for the most active extracts to isolate the active compounds.Screening of the marine organisms and bio-assay directed chromatography of the most active extracts together with identification of the active isolates using 1D and 2D NMR analysis, were investigated.RESULTS indicated that the isolates echinosides A and B from the sea cucumbers Actinopyga echinites Jaeger and Holothuria polii Delle Chiaie (Holothuriidae) were highly active. Their LC(50) values were equal to 0.19 μg/ml and 0.27 μg/ml, respectively. Detailed (1)HNMR data for echinosides A and B are reported here for the first time.These findings demonstrate that the isolated echinosides possess potential in vitro schistosomicidal activity against S. mansoni adult worms. Therefore, echinosides are promising as lead compounds for the development of new schistosomicidal agents. |
| Databáze: | OpenAIRE |
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