Efeitos do extrato de Baccharis dracunculifolia DC em diferentes mediadores da inflamação intestinal induzida por TNBS em ratos
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Data
2013-02-28
Autores
Chagas, Alexandre da Silveira [UNESP]
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Universidade Estadual Paulista (Unesp)
Resumo
A Doença Inflamatória Intestinal (DII) é uma doença com etiologia desconhecida e sem terapêutica curativa disponível, englobando, fundamentalmente, duas doenças distintas: a Doença de Crohn (DC) e a Retocolite Ulcerativa (RCU), ambas caracterizadas por uma inflamação crônica do intestino, com períodos de exacerbação seguidos de intervalos prolongados com remissão dos sintomas, cujo tratamento com os fármacos disponíveis apresentam sérios efeitos colaterais. Portanto, o desenvolvimento de novas estratégias de tratamento que combinem eficácia e segurança é uma importante meta na terapia da DII. A espécie Baccharis dracunculifolia DC (família Asteraceae) é uma planta medicinal brasileira usada popularmente contra úlceras, inflamação e problemas hepáticos e tem sido amplamente reconhecida como a principal fonte botânica da resina e dos constituintes químicos da própolis brasileira (própolis verde), a qual tem sido incorporada em alimentos e bebidas para a melhora da saúde. Estudos mostram que as inúmeras atividades biológicas da própolis verde decorrem exclusivamente dos constituintes presentes em Baccharis dracunculifolia, a qual possui várias atividades biológicas, especialmente agindo como imunomoduladora, anti-inflamatória e anti-inflamatória intestinal, sequestradora de radicais livres, antiúlcera e analgésica. A atividade anti-inflamatória intestinal está associada à presença de diferentes ácidos fenólicos presentes na espécie, tais como ácidos cafeico, p-cumárico, 3-prenil-p-cumárico (drupanina), 3,5-diprenil-p-cumárico (artepilina C), bacarina e metil-éster de aromadendrina. Estes compostos possuem íntima associação biossintética com os derivados cumarínicos também ativos na doença inflamatória intestinal, justamente por fazerem parte de sua rota biossintética. Com base nestas...
The Inflammatory Bowel Disease (IBD) is a disease with unknown etiology and no curative treatment available, encompassing essentially two distinct diseases: Crohn's disease (CD) and ulcerative colitis (UC), both characterized by chronic inflammation of the intestine, with periods of exacerbation followed by long intervals with symptom remission whose treatment with available drugs have serious side effects. Therefore, the development of new treatment strategies that combine effectiveness and safety is an important goal in the treatment of IBD. The species Baccharis dracunculifolia DC (Asteraceae) is a Brazilian medicinal plant popularly used against ulcers, inflammation and liver problems and has been widely recognized as the main botanical source of the resin and the chemical constituents of Brazilian propolis (green-propolis), which has been incorporated in foods and beverages to improve health. Studies show that the numerous biological activities of green propolis derived exclusively from the constituents present in Baccharis dracunculifolia, which has several biological activities, especially acting as immunomodulatory, anti-inflammatory and anti-inflammatory intestinal free radical scavenging, antiulcer and analgesic. The intestinal anti-inflammatory activity is associated with the presence of different phenolic acids in this specie, such as caffeic acid, p-coumaric acid, 3-prenyl-p-coumaric (drupanina), 3,5-diprenyl-p-coumaric acid (C artepilina ) bacarina and methyl ester aromadendrin. These compounds have a close association with the biosynthetic coumarin derivatives also active in inflammatory bowel disease, just by being part of their biosynthetic pathway. Based on this information, the aim of this study was to identify potential pharmacological targets of anti-inflammatory action of the extract... (Complete abstract click electronic access below)
The Inflammatory Bowel Disease (IBD) is a disease with unknown etiology and no curative treatment available, encompassing essentially two distinct diseases: Crohn's disease (CD) and ulcerative colitis (UC), both characterized by chronic inflammation of the intestine, with periods of exacerbation followed by long intervals with symptom remission whose treatment with available drugs have serious side effects. Therefore, the development of new treatment strategies that combine effectiveness and safety is an important goal in the treatment of IBD. The species Baccharis dracunculifolia DC (Asteraceae) is a Brazilian medicinal plant popularly used against ulcers, inflammation and liver problems and has been widely recognized as the main botanical source of the resin and the chemical constituents of Brazilian propolis (green-propolis), which has been incorporated in foods and beverages to improve health. Studies show that the numerous biological activities of green propolis derived exclusively from the constituents present in Baccharis dracunculifolia, which has several biological activities, especially acting as immunomodulatory, anti-inflammatory and anti-inflammatory intestinal free radical scavenging, antiulcer and analgesic. The intestinal anti-inflammatory activity is associated with the presence of different phenolic acids in this specie, such as caffeic acid, p-coumaric acid, 3-prenyl-p-coumaric (drupanina), 3,5-diprenyl-p-coumaric acid (C artepilina ) bacarina and methyl ester aromadendrin. These compounds have a close association with the biosynthetic coumarin derivatives also active in inflammatory bowel disease, just by being part of their biosynthetic pathway. Based on this information, the aim of this study was to identify potential pharmacological targets of anti-inflammatory action of the extract... (Complete abstract click electronic access below)
Descrição
Palavras-chave
Farmacologia, Intestinos - Doenças inflamatórias, Matéria médica vegetal, Stress oxidativo, Rato como animal de laboratorio, Inflammatory bowel disease
Como citar
CHAGAS, Alexandre da Silveira. Efeitos do extrato de Baccharis dracunculifolia DC em diferentes mediadores da inflamação intestinal induzida por TNBS em ratos. 2013. 62 f. Dissertação (mestrado) - Universidade Estadual Paulista Julio de Mesquita Filho, Instituto de Biociências de Botucatu, 2013.