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Effect of Isolated Proteins from Crotalus Durissus Terrificus Venom on Leishmania (Leishmania) Amazonensis-Infected Macrophages

[ Vol. 27 , Issue. 8 ]

Author(s):

Simone Katz, Clara Lúcia Barbiéri, Fernanda Paula Martins Soler, Andreimar Martins Soares, Maria Cristina Chavantes and Stella Regina Zamuner*   Pages 718 - 724 ( 7 )

Abstract:


Background: Cutaneous and mucocutaneous leishmaniasis are parasitic diseases characterized by skin manifestations. In Brazil, Leishmania (Leishmania) amazonensis is one of the etiological agents of cutaneous leishmaniasis. The therapeutic arsenal routinely employed to treat infected patients is unsatisfactory, especially for pentavalent antimonials, as they are often highly toxic, poorly tolerated and of variable effectiveness. This study aimed to evaluate in vitro the leishmanicidal activity of toxins isolated from Crotalus durissus terrificus venom as a new approach for the treatment of leishmaniasis.

Methods: The comparative effects of crotamine, crotoxin, gyrotoxin, convulxin and PLA2 on bone marrow-derived macrophages infected with L. (L.) amazonensis as well as the release of TGF-β from the treated macrophages were studied.

Results and Discussion: Crotamine had the strongest inhibitory effect on parasite growth rate (IC50: 25.65±0.52 μg/mL), while convulxin showed the weakest inhibitory effect (IC50: 52.7±2.21 μg/mL). In addition, TGF-β was significantly reduced after the treatment with all toxins evaluated.

Conclusion: The Crotalus durissus terrificus toxins used in this study displayed significant activity against L. (L.) amazonensis, indicating that all of them could be a potential alternative for the treatment of cutaneous leishmaniasis.

Keywords:

Crotalus durissus terrificus toxins, parasitic diseases, cutaneous leishmaniasis, Leishmania (Leishmania) amazonensis, macrophages, TGF-β.

Affiliation:

Department of Medicine, Universidade Nove de Julho (UNINOVE), Rua Vergueiro, 235, 01504-000, Sao Paulo, SP, Departamento de Microbiologia, Imunologia e Parasitologia, Escola Paulista de Medicina, Universidade Federal de Sao Paulo, Sao Paulo, SP, Department of Medicine, Universidade Nove de Julho (UNINOVE), Rua Vergueiro, 235, 01504-000, Sao Paulo, SP, Fundacao Oswaldo Cruz, FIOCRUZ, Rua da Beira, 7671, 76812-245, Porto Velho, RO, Department of Medicine, Universidade Nove de Julho (UNINOVE), Rua Vergueiro, 235, 01504-000, Sao Paulo, SP, Department of Medicine, Universidade Nove de Julho (UNINOVE), Rua Vergueiro, 235, 01504-000, Sao Paulo, SP

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