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Revista Boliviana de Química

On-line version ISSN 0250-5460

Abstract

ROJAS U., Joahan et al. Rev. Bol. Quim [online]. 2009, vol.26, n.2, pp.43-48. ISSN 0250-5460.

In this study the eight medicinal plants from the Peruvian Amazon were evaluated searching their parasiticide activity in vitro: Ampelozizyphus amazonicus, Andira inermes, Bellusia pentamera, Couma macrocarpa, Croton lechleri, Unonopsis spectabilis, Urena lobat and, Xilopia parviflor.   The study was performed using different species of promastigotes from  Leishmania: L. amazonensis (IFLA/BR/75/PH8), L. braziliensis (MHOM/BR/75/M2903) and L. donovani (MHOM/74/PP75) . The assays were developed by count trough an optical method in a Neubauer camera and fractions that were active have been evaluated with the colorimetric the method using XTT. The organic CH2Cl2 extract from Unonopsis spectabilis was the more active with an IC50 65.3, 54.2 and 24.5 mg/mL vs. L. amazonensis  (IFLA/BR/75/PH8), L. braziliensis (MHOM/BR/75/M2903) and L. donovani (MHOM/74/PP75) from the optical method respectively. In order to determine the leishmanicide activity of the organic fraction the colorimetric XTT method was used against L. braziliensis (MHOM/BR/75/M2903) and L. amazonensis (MHOM/BR/76/LTB-012). The results showed values of IC50 between 10.6 mg/mL and 11.8 mg/mL respectively./ En el presente trabajo se evaluó el efecto parasiticida in vitro de ocho plantas medicinales de la amazonia peruana: Ampelozizyphus amazonicus, Andira inermes, Bellusia pentamera, Couma macrocarpa, Croton lechleri, Unonopsis spectabilis, Urena lobata, Xilopia parviflora. Los estudios in vitro fueron realizados sobre promastigotes de diferentes especies de Leishmania: L. amazonensis (IFLA/BR/75/PH8), L. braziliensis (MHOM/BR/75/M2903) y L. donovani (MHOM/74/PP75) a través  del método óptico por conteo en cámara de Neubauer y las fracciones que resultaron activas fueron evaluadas a través del método colorimétrico XTT. El  extracto CH2Cl2 de Unonopsis spectabilis fué el mas activo con una CI50 de 65.3, 54.2 y 24.5 mg/mL frente a L. amazonensis, (IFLA/BR/75/PH8), L. braziliensis (MHOM/BR/75/M2903) y L. donovani (MHOM/74/PP75) por el método óptico respectivamente. A si mismo la actividad leishmanicida de las fracciones por el método colorimétrico XTT contra las cepas L. braziliensis (MHOM/BR/75/M2903) y L. amazonensis (MHOM/BR/76/LTB-012), dieron valores de CI50 entre 10.6 mg/mL y 11.8 mg/mL respectivamente

Keywords : Extractos, plantas de la amazonía peruana; leishmanicida; óptico; test de reducción de tetrazoilo.

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