title: Antiamoebic activity of benzyl glucosinolate from Lepidium virginicum.
abstract: In a continuation of our search for potential antiprotozoal agents from plants, we found that a crude extract from the roots of Lepidium virginicum exhibited antiprotozoal activity against Entamoeba histolytica trophozoites (IC(50) of 100.1 micro g/mL). Bioassay-guided fractionation resulted in the isolation of one known glucosinolate responsible for such activity. This compound was identified as benzyl glucosinolate. It showed in vitro activity against Entamoeba histolytica strain HM1-IMSS (IC(50) of 20.4 micro g/mL). The results support the anecdotal reports for the traditional use of L. virginicum roots in the control of diarrhoea and dysentery in the highlands of Chiapas, Mexico.
authors.affiliation: Unidad de Investigación Médica en Farmacología de Productos Naturales, Hospital de Pediatría, Centro Médico Nacional Siglo XXI, IMSS, México. fercalber1@hotmail.com
authors.forename: Fernando
authors.initials: F
authors.lastname: Calzada
authors.forename: Elizabeth
authors.initials: E
authors.lastname: Barbosa
authors.forename: Roberto
authors.initials: R
authors.lastname: Cedillo-Rivera
mesh_terms: D000818:Animals; D000981:Antiprotozoal Agents / Q000008:administration & dosage / Q000494:pharmacology* / Q000627:therapeutic use; D004748:Entamoeba histolytica / Q000187:drug effects*; D029686:Lepidium; D021261:Parasitic Sensitivity Tests; D008517:Phytotherapy; D010936:Plant Extracts / Q000008:administration & dosage / Q000494:pharmacology / Q000627:therapeutic use; D018517:Plant Roots; D013861:Thiocyanates / Q000008:administration & dosage / Q000494:pharmacology* / Q000627:therapeutic use; D013863:Thioglucosides / Q000008:administration & dosage / Q000494:pharmacology* / Q000627:therapeutic use
chemical_list: D000981:Antiprotozoal Agents; D010936:Plant Extracts; D013861:Thiocyanates; D013863:Thioglucosides; C408882:benzylglucosinolic acid