(Eh) y metanólico (Em) de Pera distichophylla sobre un aislado de ...
(Eh) y metanólico (Em) de Pera distichophylla sobre un aislado de ...
(Eh) y metanólico (Em) de Pera distichophylla sobre un aislado de ...
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Artículo Original<br />
42<br />
Rev. Ibero-Latinoam. Parasitol. (2012); 71 (1): 42-54<br />
Evaluación <strong>de</strong> la actividad biológica <strong>de</strong> los extractos<br />
hexanólico (<strong>Eh</strong>) y metanólico (<strong>Em</strong>) <strong>de</strong> <strong>Pera</strong><br />
<strong>distichophylla</strong> <strong>sobre</strong> <strong>un</strong> <strong>aislado</strong> <strong>de</strong> Acanthamoeba spp.<br />
proveniente <strong>de</strong> <strong>un</strong>a úlcera corneal<br />
DORLA A. 1 , WAGNER C. M. 1 , PÉREZ DE G. M. V. 1 , BLANCO DE M. J. 2 , GALINDO M. V. 1 , NESSI A. 1 ,<br />
VETHENCOURT M. A., BANDES A. 1 y GUZMáN DE R. C. T. 1<br />
1 Laboratorio <strong>de</strong> Amibiasis, Cátedra <strong>de</strong> Parasitología, Escuela <strong>de</strong> Bioanálisis, Universidad Central <strong>de</strong> Venezuela.<br />
E-mail: bioparas@ucv.ve, angelyseb@gmail.com<br />
2 Grupo <strong>de</strong> Productos Naturales, Escuela <strong>de</strong> Química. Facultad <strong>de</strong> Ciencias, Universidad Central <strong>de</strong> Venezuela.<br />
ABSTRACT<br />
BIOLOGICAL ACTIVITY OF HEXANOLIC (EH) AND METHANOLIC (EM) EXTRACTS<br />
FROM PERA DISTICHOPHYLLA AGAINST AN ACANTHAMOEBA SPP. ISOLATE<br />
OBTAINED FROM A CORNEAL ULCER<br />
Recently, infections due to Acanthamoeba genus have increased, specially ocular affections and<br />
pharmacological treatment for them has some limitations. Searching for effective alternatives against<br />
this protozoan, we <strong>de</strong>ci<strong>de</strong>d to evaluate natural products obtained from plants, having previous reports of<br />
amoebicidal activity of some extracts against different species of Acanthamoeba. We evaluated in vitro<br />
biological activity of hexanolic (<strong>Eh</strong>) and methanolic (<strong>Em</strong>) extract, obtained from <strong>Pera</strong> <strong>distichophylla</strong>, an<br />
amazonic plant, against an Acanthamoeba spp. (A27) strain, isolated from a patient suffering a corneal<br />
ulcer. Trophozoites of isolate A27 exposed to different <strong>Eh</strong> concentrations presented morphological changes,<br />
probably caused by the effect of DMSO as solvent extract, while morphological changes observed after<br />
contact with <strong>Em</strong> seemed to be caused by 0.75 mg/ml <strong>Em</strong> concentration and not by the DMSO; no changes<br />
were observed in the cysts. The 0.75 mg/ml <strong>Eh</strong> concentration apparently <strong>de</strong>creased the proliferation<br />
of Acanthamoeba spp. and <strong>Em</strong> produced lysis. Viability tests not yiel<strong>de</strong>d important changes. Finally,<br />
we recommend evaluating these extracts on other Acanthamoeba spp. isolates, to <strong>de</strong>termine whether<br />
these effects are isolate-<strong>de</strong>pen<strong>de</strong>nt; performing cytotoxicity tests on corneal cells and in vivo studies in<br />
experimental animals, which would provi<strong>de</strong> more information about its activity and prophylactic potential<br />
or therapeutic use.<br />
Key words: Acanthamoeba spp., corneal ulcer, natural extracts, <strong>Pera</strong> <strong>distichophylla</strong>.<br />
Recibido: 15 <strong>de</strong> J<strong>un</strong>io <strong>de</strong> 2011. Aceptado: 15 <strong>de</strong> Mayo <strong>de</strong> 2012.<br />
Correspon<strong>de</strong>ncia: Carolina M. Wagner. Laboratorio <strong>de</strong> Amibiasis, Cátedra <strong>de</strong> Parasitología, Escuela <strong>de</strong> Bioanálisis,<br />
Universidad Central <strong>de</strong> Venezuela.<br />
E-mail: bioparas@ucv.ve, angelyseb@gmail.com