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A.St.-Hil., Cambess View metadata, citation and similar papers at core.ac.uk brought to you by CORE provided by Universidade Paranaense: Revistas Científicas da UNIPAR AVALIAÇÃO DAS PROPRIEDADES ANTIOXIDANTES, ANTICOLINESTERÁSICAS E CITOTÓXICAS DOS FRUTOS DE Allophylus edulis (A.ST.-HIL., CAMBESS. & A. JUSS.) RADLK. (SAPINDACEAE) Suzana Harue Umeo1 Tânia Mayumi Ito1 Meire Emiko Yokota1 Mariza Barion Romagnolo2 Antonio Laverde Junior1* UMEO, S. H.; ITO, T. M.; YOKOTA, M. E.; ROMAGNOLO, M. B.; LAVERDE-JUNIOR, A. Avaliação das propriedades antioxidantes, anticolinesterásicas e citotóxicas dos frutos de Allophylus edulis (A.St.-Hil., Cambess. & A. Juss.) Radlk. (Sapindaceae). Arq. Ciênc. Saúde UNIPAR, Umuarama, v. 15, n. 2, p. 167-171, maio/ago. 2011. RESUMO: O extrato alcoólico dos frutos da espécie nativa Allophylus edulis (A.St.-Hil., Cambess. & A. Juss.) Radlk. (Sapindaceae), po- pularmente conhecida como “vacum”, “fruto-de-pombo”, “vacunzeiro”, “chal-chal”, “murta vermelha”, foi avaliado no presente trabalho quanto às atividades citotóxicas, antioxidantes e anticolinesterásicas. O extrato dos frutos mostrou baixa toxicidade pelo bioensaio de letali- -1 dade frente à náuplios de Artemia salina Leach (CL50 > 1000 µg mL ), não sendo considerado citotóxico. As propriedades antioxidantes fo- -1 ram investigadas in vitro pelo método de DPPH e foram consideradas bastante significativas (CI50 = 46,4 µg mL ). Apenas um componente do extrato mostrou atividade anticolinesterásica pelo ensaio enzimático de inibição de acetilcolinesterase. Estes resultados sugerem que os frutos de Allophylus edulis apresentem baixa toxicidade e sejam considerados uma fonte de metabólitos bioativos, podendo ser indicados em terapias de doenças relacionadas com a presença de radicais livres. Tanto a atividade antioxidante quanto a atividade anticolinesterásica estão sendo relatadas pela primeira vez para esta espécie. PALAVRAS-CHAVE: Allophylus edulis. Vacum. Fruto-de-pombo. Sapindaceae. Atividade antioxidante. Atividade anticolinesterásica. EVALUATION OF ANTIOXIDANT, CYTOTOXIC AND ANTICHOLINESTERASE PROPERTIES OF Allophylus edulis (A.ST.-HIL., CAMBESS. & A. JUSS.) RADLK. (SAPINDACEAE) FRUITS ABSTRACT: The alcoholic fruit extract of native species Allophylus edulis (A.St.-Hil., Cambess. & A. Juss.) Radlk. (Sapindaceae), commonly known as “vacum”, “fruto-de-pombo”, “vacunzeiro”, “chal-chal”, “murta vermelha”, was evaluated in this study regarding its cytotoxic, antioxidant and anticholinesterase activities. The fruit extract showed low toxicity to bioassay lethality for Artemia salina Le- -1 ach (LC50> 1000 µg mL ) and not considered cytotoxic. The antioxidant properties were investigated in vitro by DPPH method and were -1 considered highly significant (IC50 = 46.4 µg mL ). Only one component of this extract showed anticholinesterase activity by enzymatic assay of inhibition of acetylcholinesterase. These results suggest that Allophylus edulis fruits have low toxicity and are considered a source of bioactive metabolites, may be prescribed in the therapy of diseases related to the presence of free radicals. Both the antioxidant and anticholinesterase activities for this species have been reported for the first in this study. KEYWORDS: Allophylus edulis. “Vacum”. “Fruto-de-pombo”. Sapindaceae. Antioxidant activity. Anticholinesterasic activity. Introdução intestinais e digestivos (ABREU et al., 2005). Já os frutos maduros são comestíveis e quando fermen- Allophylus edulis (A.St.-Hil., Cambess. & A. tados produzem a bebida “chicha” (ABREU et al., Juss.) Radlk., popularmente conhecida como “chal- 2005). Alguns estudos relataram que A. edulis apre- -chal”, “vacum”, “fruto-de-pombo”, “vacunzeiro”, senta propriedades repelentes contra insetos (CAS- “murta vermelha”, “pau-de-pedreira”, é uma es- TILHO et al., 2009) e atividade genotóxica (YAJIA pécie pertencente à família Sapindaceae (LOREN- et al., 1999). ZI, 1992). Encontra-se distribuída em boa parte da Outras espécies do gênero Allophyllus tam- América do Sul (Guiana, Brasil, Bolívia, Paraguai, bém apresentam propriedades biológicas e medi- Argentina e Uruguai). Corresponde a uma árvore de cinais interessantes. A espécie A. serratus possui porte médio, sendo muito utilizada na recuperação atividades antiosteoporogênica (MANMEET et al., de ecossistemas degradados. A madeira produzida é 2010) e antiulcerogênica (DHARMANI et al., 2005). de boa qualidade, podendo ser utilizada em diversas Segundo Marwah et al. (2007), as folhas de A. rubi- áreas (marcenaria, carvão, esteiras, moirões) (SENE- folius apresentam potencial capacidade antioxidante. ME; POSSAMAI; SCHUTA, 2006). Tanto as folhas, Outra espécie com propriedades biológicas impor- quanto os frutos de A. edulis possuem propriedades tantes é a A. cobbe, a qual mostrou atividades ne- terapêuticas. A infusão das folhas é empregada no maticidas e inseticidas (JAYASINGHE et al., 2003a; tratamento de diabetes (DIAZ et al., 2008), em infla- 2003b). mações de garganta, feridas, pressão alta, problemas 1Programa de Mestrado em Biotecnologia Aplicada à Agricultura, Instituto de Ciências Exatas, Agrárias, Tecnológicas e Geociências, Uni- versidade Paranaense, Praça Mascarenhas de Moraes, s/n, cx. p. 224, CEP 87502-210, Umuarama, PR, Brasil. 2Laboratório de Botânica, Departamento de Ciências Biológicas, Universidade Estadual de Maringá, Av. Colombo, 5790, CEP 87020-900, Maringá, PR, Brasil. (*correspondência: [email protected]) Arq. Ciênc. Saúde UNIPAR, Umuarama, v. 15, n. 2, p. 167-171, maio/ago. 2011 167 UMEO et al. Quanto à composição química das espécies solução de 38,0g de sal marinho em 1,0 L de água deste gênero, ainda há poucos estudos. Segundo Ya- deionizada. Uma solução do radical livre estável jia et al. (1999), a espécie A. edulis é constituída por 2,2-difenil-1-picrilidrazila (DPPH; Sigma-Aldrich®) compostos fenólicos, cianoglicosídeos, flavonoides, foi preparada em metanol (4,7mg/200mL) para a antraquinonas, naftoquinonas, alcaloides, esteroides avaliação da atividade antioxidante. Acetilcolineste- e triterpenoides. Diaz et al. (2008), isolaram o L-que- rase de peixe elétrico (EC 3.1.1.7, Sigma-Aldrich®) brachitol, uma substância com potencial para substi- foi utilizada em todos os ensaios bioautográficos. A tuir o açúcar, cujo consumo justificaria o uso popular enzima liofilizada foi dissolvida em solução tampão desta planta em tratamento contra o diabetes. O óleo (Tris 0,05 M, pH 7,8 contendo 1mg/mL de albumina das sementes de A. edulis, A. dregeanus e A. natalen- de soro bovino - BSA, 98%, Sigma-Aldrich®) para sis mostraram-se ricos em compostos cianolipídicos obter uma solução 1U/mL. Acetato de α-naftila (Sig- (AICHHOLZ; SPITZER; LORBEER, 1997; AVATO ma-Aldrich®) foi o substrato utilizado no ensaio (so- et al., 2005). Das folhas da espécie A. caldatus foram lução 1,5 % em etanol PA/água). O sal Fast Blue B identificados alguns poliprenois (CIEPICHAL et al., (95%, Sigma-Aldrich®) foi utilizado como reagente 2007). Dos frutos de A. laevigatus foram identifica- nos ensaios bioautográficos na concentração de 0,5% dos o sesquiterpeno 11-acetoxi-4-alfa-metoxieudes- em água MilliQ®. mano e as flavonas carissona e apigenina 8-C-beta- -rhamnopiranosídeo (DAVID; SANTOS; DAVID, Preparação dos extratos 2004). E finalmente, da espécieA. cobbe foram isola- das algumas amidas ácidas (JOHNS; LAMBERTO, As polpas dos frutos frescos (400 g) de A. 1969). edulis foram separadamente submetidas a um pro- Considerando a importância de ampliar o co- cesso de extração exaustiva por maceração estática nhecimento a respeito de novas propriedades biológi- com etanol. O extrato etanólico resultante foi seco cas de espécies brasileiras nativas, o presente estudo por evaporação em evaporador rotativo sob pressão buscou avaliar potenciais atividades da espécie Allo- reduzida para total remoção do solvente, seguido de phylus edulis (Camb.) Radlk. (Sapindaceae). Neste liofilização (48h), originando o extrato alcoólico bru- sentido, o extrato dos frutos de A. edulis foi avaliado to dos frutos de A. edulis (AEB, 11,2 g). pelo bioensaio de letalidade frente à Artemia salina quanto à atividade citotóxica, pelo método in vitro de Teste de atividade citotóxica inibição do radical livre estável 2,2-difenil-1-picrili- drazila (DPPH) quanto às propriedades antioxidan- Para determinar a atividade citotóxica do ex- tes, e pelo ensaio enzimático de inibição de acetil- trato alcoólico dos frutos de A. edulis foi utilizado colinesterase quanto à atividade anticolinesterásica. o teste de letalidade frente a Artemia salina Leach (MEYER et al ., 1982). Os ovos de A. salina foram Material e Métodos incubados à temperatura ambiente por 48 horas em água do mar artificial até a eclosão dos mesmos. As Material Vegetal larvas, também conhecidas como náuplios, possuem fototropismo positivo, por isso foi utilizada uma fon- Os frutos maduros da espécie Allophylus te de luz artificial para atrair e facilitar a coleta. Dez edulis foram coletados em área remanescente de flo- larvas recém eclodidas de A. salina foram transferi- resta estacional semidecidual do Noroeste do Paraná das para tubos de ensaio, contendo 5,0 mL água do (coordenadas 52o 52’W e 22o 36’S, Diamante do mar artificial e o extrato dos frutos a ser testado em Norte, PR). A planta foi identificada botanicamente diferentes concentrações (1000, 500, 250, 125, 62,5 pela Profª. Drª. Mariza Barion Romagnolo, da Uni- µg mL-1). Após 24h foi realizada a contagem das lar- versidade Estadual de Maringá (UEM). Uma exsica- vas mortas. Esse número foi usado para o cálculo
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