Efeito dos componentes obtidos de qualea multiflora sobre modelo tumoral mamário murino e sua influência no sistema imunológico
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Data
2013-04-25
Autores
Carli, Camila Bernardes de Andrade [UNESP]
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Editor
Universidade Estadual Paulista (Unesp)
Resumo
Nos últimos vinte anos, os quimioterápicos naturais foram introduzidos no tratamento do câncer e com estas novas perspectivas, vem aumentando o interesse das indústrias farmacêuticas em produtos de origem natural. Além disso, existe um grande interesse na identificação de novos agentes antineoplásicos, que possuam ação citotóxica seletiva associada à atividade imunomodulatória. Neste contexto, o presente estudo investiga possíveis efeitos farmacológicos de Qualea multiflora Mart (Vochysiaceae), utilizada na medicina popular do cerrado para o tratamento de úlceras, gastrites, amebíase, diarréia com sangue, cólicas intestinais e inflamações. A partir de resultados in vitro, propôs-se avaliar um tratamento in vivo em modelo tumoral mamário murino empregando-se uma fração terpênica (FT) derivada de Qualea multiflora (Q. multiflora) e as substâncias isoladas presentes nesta fração, lupeol (LP), lupenona (LP) e friedelina (FR), concomitantemente à avaliação dos efeitos imunológicos das substâncias testadas nos animais portadores de tumor. Os resultados parciais do presente estudo mostraram que as substâncias isoladas LP, LN e FR e a fração FT, na maioria das concentrações testadas, não apresentaram efeito tóxico in vitro sobre as células imunes, macrófagos e linfócitos . No entanto, LP, LN, FR e FT apresentaram excelente atividade citotóxica contra a linhagem tumoral LM3. AE não mostrou efeito tóxico in vitro contra a linhagem LM3. Por outro lado, a droga padrão Taxol (TX), apresentou pouco efeito tóxico contra a linhagem tumoral LM3, e acentuado efeito citotóxico contra macrófagos, indispensáveis à contenção tumoral. A partir destes resultados foram selecionadas as concentrações ideais para tratamento in vivo. Os resultados mostraram expressiva inibição do volume tumoral quando os animais foram tratados...
In the last twenty years, natural chemotherapeutic treatment were introduced into treatment of cancer and with these new perspectives, it has been increasing the interest of pharmaceutical products from natural origin. Moreover, there is great interest in identifying new anticancer agents that have selective cytotoxic activity associated with immunomodulatory activity. In this context, this study investigates possible pharmacological effects of Qualea multiflora (Q. multiflora) Vochysiaceae family, used in folk medicine of Brazilisn cerrado in the treatment of ulcers, gastritis, amebiasis, bloody diarrhea, intestinal pain and inflammation. From in vitro results, this study proposed to evaluate an alternative form of treatment for breast cancer employing a terpenic fraction (FT) derived from the chloroform extract of Q. multiflora and the isolated compounds present in this fraction, Ellagic Acid (EA), lupeol (LP), Lupenona (LP) and friedelin (FR) in an in vivo model of murine breast cancer concurrently to assess the immunological effects of the substances tested in animals with tumor. Partial results of this study showed that the isolated compounds AE, LP, LN and FR and FT fraction, most of the concentrations tested, showed no toxic effect in vitro on immune cells, macrophages and lymphocytes. However, LP, LN, FR and FT showed excellent cytotoxic activity against tumor line LM3. AE showed no toxic effect in vitro against strain LM3. Moreover, the standard drug Taxol (TX) showed little toxic effect against LM3 type of tumor, and marked effect against cytotoxic macrophages necessary for the containment of the tumor. From these results we selected the optimal concentrations for in vivo treatment. The results showed significant inhibition of tumor volume when the animals were treated... (Complete abstract click electronic access below)
In the last twenty years, natural chemotherapeutic treatment were introduced into treatment of cancer and with these new perspectives, it has been increasing the interest of pharmaceutical products from natural origin. Moreover, there is great interest in identifying new anticancer agents that have selective cytotoxic activity associated with immunomodulatory activity. In this context, this study investigates possible pharmacological effects of Qualea multiflora (Q. multiflora) Vochysiaceae family, used in folk medicine of Brazilisn cerrado in the treatment of ulcers, gastritis, amebiasis, bloody diarrhea, intestinal pain and inflammation. From in vitro results, this study proposed to evaluate an alternative form of treatment for breast cancer employing a terpenic fraction (FT) derived from the chloroform extract of Q. multiflora and the isolated compounds present in this fraction, Ellagic Acid (EA), lupeol (LP), Lupenona (LP) and friedelin (FR) in an in vivo model of murine breast cancer concurrently to assess the immunological effects of the substances tested in animals with tumor. Partial results of this study showed that the isolated compounds AE, LP, LN and FR and FT fraction, most of the concentrations tested, showed no toxic effect in vitro on immune cells, macrophages and lymphocytes. However, LP, LN, FR and FT showed excellent cytotoxic activity against tumor line LM3. AE showed no toxic effect in vitro against strain LM3. Moreover, the standard drug Taxol (TX) showed little toxic effect against LM3 type of tumor, and marked effect against cytotoxic macrophages necessary for the containment of the tumor. From these results we selected the optimal concentrations for in vivo treatment. The results showed significant inhibition of tumor volume when the animals were treated... (Complete abstract click electronic access below)
Descrição
Palavras-chave
Mamas - Cancer, Neovascularização, Citocinas, Quimiotaxonomia vegetal, Agentes antineoplasicos, Cytokines
Como citar
CARLI, Camila Bernardes de Andrade. Efeito dos componentes obtidos de qualea multiflora sobre modelo tumoral mamário murino e sua influência no sistema imunológico. 2012. 108 f. Tese (doutorado) - Universidade Estadual Paulista Júlio de Mesquita Filho, Faculdade de Ciências Farmacêuticas, 2012.