study of triclabendazole (tcbz) effect on aspartate transaminase (ast) activity of fasciola gigantica parasite and liver enzyme activity assay

background: aspartate transaminase (ast) is an important enzyme in parasite and liver tissue. the purpose of this investigation is to evaluate triclabendazole (tcbz) effect on ast activity of fasciola gigantica parasite. to compare of enzyme level of parasite and its host tissue, enzyme activity of f. gigantica parasite and liver tissues were also determined. method: the livers were collected from sheep slaughtered in local slaughterhouse and living f. gigantica parasites were isolated. the washed parasites were cultured in buffe rmedia with or without triclabendazole (egaten®); 15μg/ml in an incubator at 37° c. extractions of collected parasites and liver tissues were prepared by homogenizing buffer in a mortar and pestle. extraction samples were examined for protein measurement, ast activity assay and protein recognition. results: the results of ast assay revealed, enzyme activity for treated and untreated is not significant. healthy liver tissue shows significantly higher enzyme activity than parasite. enzyme activity for healthy and infected liver tissues was significant. enzymatic proteins including cathepsin l & b (protease) were recognized in parasite samples. conclusion: although ast could not be concerned as an indicator for efficiency treatment, however may be involved as a biomarker for biochemical comparison of parasite and host tissue.