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Revista Brasileira de Farmacognosia
Print version ISSN 0102-695X
FREITAS, José C. C. et al. Effect of ethyl acetate extract from husk fiber water of Cocos nucifera in Leishmania braziliensis infected hamsters. Rev. bras. farmacogn. [online]. 2011, vol.21, n.6, pp.1006-1011. Epub Aug 12, 2011. ISSN 0102-695X. http://dx.doi.org/10.1590/S0102-695X2011005000138.
The objective of this study was to evaluate the treatment with ethyl acetate extract (EAE) from husk fiber water of Cocos nucifera L., Arecaceae, in L. braziliensis (Lb) infected hamsters. Twelve male hamsters were randomly allocated in three groups (n=4): G1 received only EAE; G2 was infected with Lb only and G3 received EAE after Lb infection. The infection was carried 28 days prior to the treatment with EAE, which was administrated (0.2 mL, 300 mg.kg-1) for 21 consecutive days. Infection was evaluated through skin lesions and infected footpad edema. Haematological evaluation was done on -28th, 0 and 21st days. Imprint footpad and lymph node weight were evaluated on 21st day. Lb infection significantly inhibited the peripheral leukocytes blood. However, neutrophils and lymphocytes values did not have significant alterations. G3 presented eosinophilia in relation to G2. The treatment with EAE did not reduce edema of infected footpad neither weight of drainage lymph node. Infected footpad imprints revealed amastigotes forms and cellular infiltration. Animals from G3 presented skin lesions on 7th day, shown a reduction of these lesions in day 14. Therefore, the treatment with EAE did not alter the etiological agent elimination in these conditions. However, EAE presents a healing activity in this experimental model.
Keywords : Cocos nucifera; hematological parameters; in vivo infection; immune response; Leishmania braziliensis.