| 6 | Antileishmanial assessment of leaf extracts from Pluchea carolinensis,Pluchea odorata and Pluchea rosea显示文摘Objective:To evaluate the antileishmanial activity of different extracts from three Cuban Pluchea species.Methods:In in vitro assays the IC50was calculated in the promastigotes and amastigotes forms as cytotoxicity in murine macrophages.In leishmaniasis cutanea experiment,mortality, weight loss,lesion size and burden parasite were measured.Results:Extracts evaluated showed inhibitive effect on growing of promastigote form;however,active extracts caused a high toxicity. Ethanol and n-hexane extracts demonstrated specific antileishmanial activity.Ethanol and n-hexane extracts from Pluchea carolinensis(P.carolinensis) caused similar inhibition against amastigote form.The intraperitoneal administration of the ethanol extract of P.carolinensis at 100 mg/kg prevented lesion development compared with control groups.Conclusions:The antileishmanial experiment suggests that ethanol extracts from P.carolinensis is the most promising.Further studies are still needed to evaluate the polential of this plant as a source of new antileishmanial agents. | Marley Garcia Wilmer H Perera Ramon Scull Lianet Monzote | 2011 | Asian Pacific Journal of Tropical Medicine2011，4，10： | 0 |
| 7 | Evaluation of Cuban Bacillus thuringiensis(Berliner,1911)(Bacillales:Bacillacea)isolates with larvicidal activity against Aedes aegypti(Linnaeus,1762)(Diptera:Culicidae)显示文摘Objective:To evaluate 11 Cuban native Bacillus(B.)thuringiensis isolates in order to select one with the best larvicidal activity against Aedes(Ae.)aegypti and low cytotoxicity.Methods:The cry and cyt genes of the isolates(A21,A51,L95,L910,M29,R84,R85,R87,R89,U81 and X48)were amplified by PCR.The influence of organic matter and NaCl on the larvicidal activity was tested by bioassays.Cytotoxicity was assayed on peritoneal macrophages of BALB/c mice.Results:The cyt1(Aa,Ab,Ba),cyt2,cry4aA,cry4Ba,cry11(Aa,Ba,Bb)and cry10 genes were identified in all native Cuban isolates.The larvicidal activity(LC_(90))of seven isolates was affected by the presence of organic matter in the water,while A21,A51,L910,R84,U81 and X48 had better LC_(50),LC_(90),LC_(95) than the 266/29-Ⅶ-98 control strain.The LC_(50) of two isolates was affected by the presence of NaCl and A21,A51,R85 isolate had better larvicidal activity than the 266/29-Ⅶ-98 control strain.In terms of toxicity against macrophages,the extracts of nine isolates were less cytotoxic than the control strains.Conclusions:Native isolate A21 had the main virulence factors against Ae.aegypti larvae,displayed a good larvicidal activity in presence of different factors related with Ae.aegypti breeding sites,and had low citotoxicity against macrophages.These results can contribute to the improvement of existing biological control strategies and the development of new biolarvicides. | Aileen Gonzalez Rizo Camilo E Castañet Martinez Celeste Ramírez Cardentey Ariamys Companioni Ibañez Zulema Menéndez Díaz Lianet Monzote Fidalgo Hilda M HernandezÁlvarez | 2022 | Asian Pacific Journal of Tropical Medicine2022，15，2： | 0 |
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