Atividade antiinflamatória e antitumoral da fração terpenoídica e de -sitosterol obtidos de qualea multiflora
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Data
2009-03-18
Autores
Carli, Camila Bernardes de Andrade [UNESP]
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Universidade Estadual Paulista (Unesp)
Resumo
Os produtos naturais, incluindo aqueles derivados de plantas superiores, têm contribuído para o desenvolvimento da terapêutica moderna. Atualmente existe um interesse renovado na investigação de plantas medicinais como alternativa ao tratamento de doenças como câncer e inflamações crônicas. Qualea multiflora Mart (Q. multiflora) família Vochysiacea é uma planta utilizada na medicina popular no tratamento de úlceras, gastrites, amebíase, diarréia com sangue, cólicas intestinais e inflamações. O sistema imunológico é um notável sistema de defesa que evoluiu nos vertebrados para protegê-los de agentes agressores. Neste sistema, os macrófagos têm um papel central, pois são células capazes de secretar mais de cem produtos biologicamente ativos, entre esses, espécies reativas de nitrogênio e citocinas que atuam no contexto da resposta imunológica e/ou inflamatória. Neste trabalho, foram avaliadas as atividades antiinflamatória e antitumoral de uma fração terpenoídica e da substância b- sitosterol, isoladas a partir da planta Q. multiflora. Experimentos in vitro foram realizados para determinar as atividades destes componentes no sistema imune através de ensaios de determinação de citotoxicidade (MTT), óxido nítrico (NO), determinação do fator de transcrição NF-kB, das citocinas IL-1, IL-6, IL-12, TNF- e IL-10. Além disto, também foram realizados testes com o objetivo de avaliar a atividade antitumoral dos compostos testados frente às linhagens tumorais murinas LM3 e LP07. Os resultados mostraram intensa inibição da produção de NO e das citocinas IL-1, IL-12 e TNF- ; moderada inibição do fator de transcrição NF-kB pelos macrófagos peritoneais estimulados com a fração terpenoídica e com b-sitosterol. Por outro lado, não houve inibição da produção de IL-6. De maneira contrária às outras citocinas testadas, houve uma grande estimulação da produção da citocina pró-inflamatória IL-10,...
Natural products, including those derived from upper plants, have contributed to a large extent for the development of modern therapeutics. Lately, there is a renewed interest in the investigation of medicinal plants as an alternative for the treatment of diseases such as cancer and chronical inflammations. Qualea multiflora Mart (Vochysiacea) is a plant used in popular medicine for the treatment of ulcers, grastritis, amoebiesis, diarrhea with blood, intestinal colics and inflammations. The immune system is a remarkable defense mechanism that evolved in the vertebrate animals to protect them against pathogenic micro-organisms and cancer, among other functions. In this system, macrophages have a central role, since they are capable of secreting more than 100 biologically active products, among which, nitrogen reactive intermediaries and cytokines which act in the context of the immune and/or antiinflammatory response. In this work, it was evaluated the anti-inflammatory and anti-tumoral activities of a terpenoidic fraction and of the b-sitosterol substance, obtained from Q. multiflora. In vitro experiments were performed in order to determine the activities of those samples upon the immune system through assays for the determination of cytotoxicity (MTT), nitric oxide (NO), transcription factor NF-kB, and cytokines IL-1, IL-6, IL-10, IL-12 and TNF- . Furthermore, tests were also performed with tumoral lineages LM3 and LP07, in order to evaluate the antitumoral activites of those samples. The results evidenced intense inhibition of the production of NO and IL-1, IL-12 e TNF- ; moderate inhibition of transcripition factor NF-kB by the peritoneal murine macrophages when stimulated with the terpenoidic fraction and with the b-sitosterol substance. On the other hand, it was not inhibition of the IL-6 production. Inversely, there was a great stimulation of the production of anti-inflammatory cytokine IL-10, a desirable effect in anti- ...
Natural products, including those derived from upper plants, have contributed to a large extent for the development of modern therapeutics. Lately, there is a renewed interest in the investigation of medicinal plants as an alternative for the treatment of diseases such as cancer and chronical inflammations. Qualea multiflora Mart (Vochysiacea) is a plant used in popular medicine for the treatment of ulcers, grastritis, amoebiesis, diarrhea with blood, intestinal colics and inflammations. The immune system is a remarkable defense mechanism that evolved in the vertebrate animals to protect them against pathogenic micro-organisms and cancer, among other functions. In this system, macrophages have a central role, since they are capable of secreting more than 100 biologically active products, among which, nitrogen reactive intermediaries and cytokines which act in the context of the immune and/or antiinflammatory response. In this work, it was evaluated the anti-inflammatory and anti-tumoral activities of a terpenoidic fraction and of the b-sitosterol substance, obtained from Q. multiflora. In vitro experiments were performed in order to determine the activities of those samples upon the immune system through assays for the determination of cytotoxicity (MTT), nitric oxide (NO), transcription factor NF-kB, and cytokines IL-1, IL-6, IL-10, IL-12 and TNF- . Furthermore, tests were also performed with tumoral lineages LM3 and LP07, in order to evaluate the antitumoral activites of those samples. The results evidenced intense inhibition of the production of NO and IL-1, IL-12 e TNF- ; moderate inhibition of transcripition factor NF-kB by the peritoneal murine macrophages when stimulated with the terpenoidic fraction and with the b-sitosterol substance. On the other hand, it was not inhibition of the IL-6 production. Inversely, there was a great stimulation of the production of anti-inflammatory cytokine IL-10, a desirable effect in anti- ...
Descrição
Palavras-chave
Macrofagos, Oxido nitrico, Plantas medicinais, Produtos naturais, Medicinal plants
Como citar
CARLI, Camila Bernardes de Andrade. Atividade antiinflamatória e antitumoral da fração terpenoídica e de -sitosterol obtidos de qualea multiflora. 2009. 95 f. Dissertação (mestrado) - Universidade Estadual Paulista, Faculdade de Ciências Farmacêuticas, 2009.