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  • About
  • The Global ETD Search service is a free service for researchers to find electronic theses and dissertations. This service is provided by the Networked Digital Library of Theses and Dissertations.
    Our metadata is collected from universities around the world. If you manage a university/consortium/country archive and want to be added, details can be found on the NDLTD website.
1

Efeito da Abarema cochliacarpos (Gomes) na lesão muscular induzida pelo veneno de Bothrops leucurus / Effect of Abarema cochliacarpos (Gomes) in muscle injury induced by Bothrops leucurus

Oliveira, Jeison Saturnino de 26 February 2014 (has links)
The snakebite is a public health problem worldwide, especially in tropical countries. The objective of this study was to investigate the mechanisms involved in the effect of hydroethanolic extract of the stem bark Abarema cochliacarpos (EAc) in muscle injury induced by Bothrops leucurus. Male swiss mice were used (28-32g ; n= 6 groups), where they received perimuscular injection Bothrops leucurus venom (BlV 1 mg/Kg/paw Volume 50 ìl) the right hind limb, treated orally (po), with vehicle (saline) or EAc (100, 200 or 400 mg / kg). In the mechanical hypernociception animals were evaluated in time 2, 4 and 6 hours using digital analgesymeter (von Frey). Edema activity in the animals were evaluated at 15, 30, 60 and 90 minutes, using a digital caliper. Have motor activity was assessed by the rota -rod test and the animals were evaluated at 1, 3 and 7 days. Histological evaluation extensor digitorum longus muscle (EDL) was isolated, removed, fixed, paraffin emblocado (Optical Microscopy) and resin (Electron Microscopy) and cut. Tissues were stained with hematoxylin and eosin and observed under optical and electron microscopy and subsequently photographed. The experimental protocols were approved by the ethical committee for animal research at UFS (CEPA: 61/12). The results were analyzed using followed by Student.s t-test. The treatment orally with EAc (400 mg / kg ) inhibited mechanical hypernociception (2h 5.1 ± 0.76, 5.70 ± 0.65 4h, 6h 5.93 ± 0.49, (p < 0, 05) compared with the BlV venom group (2h 2.08 ± 0.33; 4h 2.28 ± 0.18; 6h 2.52 ± 0.24). The inhibition of edema was also seen in activity with EAc (400 mg / kg) (15 min 15.35 ± 0.27; 30 min 12.63 ± 0.69; 60 min 9.38 ± 0,29 and 90 min 6.83 ± 0.66, p < 0.05) compared with the BlV venom group (15 min 29.7 ± 0.17; 30 min 25.8 ± 0.26; 60 min 20.15 ± 0.24 and 90 min 14.76 ± 0.21). Regarding motor activity, the EAc (400 mg / kg) preserved motor ability (1day 83.22 ± 0.46; 3 days 98.02 ± 0.20 and 7 days 119.24 ± 0.48, p < 0.05) compared to the BlV venom group (1 day 20.03 ± 0.26, 3 days 35.22 ± 0.36 and 7 days 111.21 ± 0.18). Histological analysis showed an protection of muscle injury after administration of EAc (400 mg / kg), maintaining muscle fibers. Our results demonstrated that EAc inhibited the harmful effects of the venom, suggesting that this compound has biotechnological potential in adjuvant treatment of snakebite. / O ofidismo e um problema de saude publica em todo o mundo, especialmente nos paises tropicais. O objetivo deste trabalho foi de investigar os mecanismos envolvidos no efeito do extrato hidroetanolico da entrecasca da Abarema cochliacarpos (EAc) (popularmente conhecida como gbarbatimao h) na lesao muscular induzida pelo veneno de Bothrops leucurus (BlV). Foram utilizados camundongos Swiss machos (28-32 g; n=6 por grupo), que receberam injecao perimuscular do veneno Bothrops leucurus (BlV . 1 mg/Kg/pata . Volume 50 Êl) no membro posterior direito, tratados por via oral (v.o.), com veiculo (solucao salina) ou EAc (100, 200 ou 400 mg/kg). Na hipernocicepcao mecanica os animais foram avaliados nos tempos 2, 4 e 6 horas, utilizando o analgesimetro digital (Von Frey). Na atividade edematogenica os animais foram avaliados nos tempos 15, 30, 60 e 90 minutos, utilizando o paquimetro digital. Ja atividade motora foi avaliada pelo teste de rota-rod e os animais foram avaliados em 1, 3 e 7 dias. Na avaliacao histologica o musculo Extensor digitorum longus (EDL) foi isolado, retirado, fixado, emblocado com parafina (Microscopia optica) e resina (Microscopia eletronica) e cortados. Os tecidos foram corados com hematoxilina- eosina e observados ao microscopio optico e eletronico e posteriormente fotografados. Os protocolos experimentais foram aprovados pelo comite de etica em pesquisa com animais da UFS (CEPA: 61/12). Os resultados foram analisados utilizando o teste Student.S t-test. O tratamento, por v.o, com EAc (400 mg/Kg) inibiu a hipernocicepcao mecanica, (2h 5,1 }0,76; 4h 5,70 }0,65; 6h 5,93 }0,49; p<0,05) quando comparados aos animais do grupo BlV (veneno) (2h 2,08 }0,33; 4h 2,28 }0,18; 6h 2,52 }0,24). A inibicao tambem foi verificada na atividade edematogenica, com EAc (400 mg/kg), (15 min. 15,35 }0,27; 30 min. 12,63 }0,69; 60 min. 9,38 }0,29 e 90 min. 6,83 }0,66; p<0,05), quando comparados aos animais do grupo BlV (veneno) (15 min. 29,7 }0,17; 30 min. 25,8 }0,26; 60 min. 20,15 }0,24 e 90 min. 14,76 }0,21). Quanto a atividade motora, o EAc (400 mg/Kg) preservou a capacidade motora (1 dia 83,22 }0,46; 3 dias 98,02 }0,20 e 7 dias 119,24 }0,48; p<0,05), comparados ao grupo BlV (veneno) (1 dia 20,03 }0,26; 3 dias 35,22 }0,36 e 7 dias 111,21 }0,18). Na analise histologica verificou-se uma protecao da lesao muscular apos administracao do EAc (400 mg/Kg), preservando as fibras musculares. Nossos resultados demonstraram que o EAc inibiu os efeitos nocivos do veneno, sugerindo que este composto apresenta potencial biotecnologico no tratamento coadjuvante do ofidismo.

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