In vitro effect of Aloe vera, Coriandrum sativum and Ricinus communis fractions on Leishmania infantum and on murine monocytic cells

In South America, visceral leishmaniasis is a zoonosis caused by the protozoan species Leishmania infantum (syn. L. chagasi) and is primarily transmitted through the bite of the female Lutzomyia longipalpis. Its main reservoir in urban areas is the dog. The application of control measures recommende...

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Veröffentlicht in:Veterinary parasitology 2011-06, Vol.178 (3), p.235-240
Hauptverfasser: Rondon, Fernanda C.M., Bevilaqua, Claudia M.L., Accioly, Marina P., Morais, Selene M., Andrade-Junior, Heitor F., Machado, Lyeghyna K.A., Cardoso, Roselaine P.A., Almeida, Camila A., Queiroz-Junior, Eudson M., Rodrigues, Ana Caroline M.
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container_end_page 240
container_issue 3
container_start_page 235
container_title Veterinary parasitology
container_volume 178
creator Rondon, Fernanda C.M.
Bevilaqua, Claudia M.L.
Accioly, Marina P.
Morais, Selene M.
Andrade-Junior, Heitor F.
Machado, Lyeghyna K.A.
Cardoso, Roselaine P.A.
Almeida, Camila A.
Queiroz-Junior, Eudson M.
Rodrigues, Ana Caroline M.
description In South America, visceral leishmaniasis is a zoonosis caused by the protozoan species Leishmania infantum (syn. L. chagasi) and is primarily transmitted through the bite of the female Lutzomyia longipalpis. Its main reservoir in urban areas is the dog. The application of control measures recommended by health agencies have not achieved significant results in reducing the incidence of human cases, and the lack of effective drugs to treat dogs resulted in the prohibition of this course of action in Brazil. Therefore, it is necessary to search new alternatives for the treatment of canine and human visceral leishmaniasis. The objectives of this study were to evaluate the in vitro effect of fractions from Aloe vera (aloe), Coriandrum sativum (coriander), and Ricinus communis (castor) on promastigotes and amastigotes of L. infantum and to analyze the toxicity against the murine monocytic cells RAW 264.7. To determine the viability of these substances on 50% parasites (IC50), we used a tetrazolium dye (MTT) colorimetric assay (bromide 3-4.5-dimethylthiazol-2-yl-2,5-dephenyltetrazolium), and on amastigotes we performed an in situ ELISA. All fractions were effective against L. infantum promastigotes and did not differ from the positive control pentamidine ( p > 0.05). However, the R. communis ethyl acetate and chloroform fractions, as well as the C. sativum methanol fraction, were the most effective against amastigotes and did not differ from the positive control amphotericin B ( p > 0.05). The R. communis ethyl acetate fraction was the least toxic, presenting 83.5% viability of RAW 264.7 cells, which was similar to the results obtained with amphotericin B ( p > 0.05). Based on these results, we intend to undertake in vivo studies with R. communis ethyl acetate fractions due the high effectiveness against amastigotes and promastigotes of L. infantum and the low cytotoxicity towards murine monocytic cells.
doi_str_mv 10.1016/j.vetpar.2011.01.007
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L. chagasi) and is primarily transmitted through the bite of the female Lutzomyia longipalpis. Its main reservoir in urban areas is the dog. The application of control measures recommended by health agencies have not achieved significant results in reducing the incidence of human cases, and the lack of effective drugs to treat dogs resulted in the prohibition of this course of action in Brazil. Therefore, it is necessary to search new alternatives for the treatment of canine and human visceral leishmaniasis. The objectives of this study were to evaluate the in vitro effect of fractions from Aloe vera (aloe), Coriandrum sativum (coriander), and Ricinus communis (castor) on promastigotes and amastigotes of L. infantum and to analyze the toxicity against the murine monocytic cells RAW 264.7. 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Based on these results, we intend to undertake in vivo studies with R. communis ethyl acetate fractions due the high effectiveness against amastigotes and promastigotes of L. infantum and the low cytotoxicity towards murine monocytic cells.</abstract><cop>Netherlands</cop><pub>Elsevier B.V</pub><pmid>21320755</pmid><doi>10.1016/j.vetpar.2011.01.007</doi><tpages>6</tpages></addata></record>
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subjects Aloe
Aloe - chemistry
Aloe vera
Amastigotes
Animals
Cell Line
Cell Survival - drug effects
Coriandrum - chemistry
Coriandrum sativum
Cytotoxicity
Inhibitory Concentration 50
Leishmania infantum
Leishmania infantum - drug effects
Leishmania infantum - growth & development
Leishmaniasis, Visceral - drug therapy
Leishmanicidal activity
Lutzomyia longipalpis
Mice
Monocytes - drug effects
Plant Extracts - pharmacology
Promastigotes
Regression Analysis
Ricinus - chemistry
Ricinus communis
title In vitro effect of Aloe vera, Coriandrum sativum and Ricinus communis fractions on Leishmania infantum and on murine monocytic cells
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