文摘
We report the <em>in vitroem> schistosomicidal effects of the essential oil obtained from <em>Citrus limoniaem> leaves (CL-EO) and <em>C. reticulataem> fruit peels (CR-EO), cultivated in Brazil, against <em>Schistosoma mansoniem> worms. Limonene (29.9%), <em>βem>-pinene (12.0%), sabinene (9.0%), citronellal (9.0%), and citronellol (5.8%) are the major constituents of CL-EO; limonene (26.5%), <em>γem>-terpinene (17.2%), linalool (11.1%), octanal (8.0%), myrcene (6.2%), and capraldehyde (3.9%) predominate in CR-EO. CL-EO displayed moderate lethal concentration 50% (<em>LCem>50) of 81.7 and 38.9 μg/ml against male and female worms at 24 and 72 h, respectively. At concentrations of 25 and 100 μg/ml, CL-EO separated between 50 and 75% of the coupled worm pairs during the evaluated period. CR-EO presented moderate <em>LCem>50 of 81.7 μg/ml against male and female worms at 24 and 72 h. However, this oil separated coupled worm pairs more effectively than CL-EO and displayed lower cytotoxicity to GM07492-A cells (<em>ICem>50 = 987.7 ± 88.9 μg/ml) as compared to CL-EO (<em>ICem>50 = 187.8 ± 2.9 μg/ml). The enantiomers (+)-(<em>Rem>)-limonene and (−)-(<em>Sem>)-limonene did not affect <em>S. mansoniem> adult worm pairs significantly. Taken together, these data indicate that CL-EO and CR-EO exhibit moderate <em>in vitroem> schistosomicidal activity against adult <em>S. mansoniem> worms.