Bidens pilosa L: efeitos protetores na inflamação intestinal

• Autor(a) principal: Quaglio, Ana Elisa Valencise [UNESP]
• Data de Publicação: 2015
• Tipo de documento: Tese
• Idioma: por
• Título da fonte: Repositório Institucional da UNESP
• Texto Completo: http://hdl.handle.net/11449/123340
• topic: Doenças inflamatórias intestinais; Erva daninha; Bidens pilosa - Uso terapêutico; Extratos vegetais; Intestines - Diseases; Bidens pilosa

Inflammatory Bowel Disease (IBD) comprises basically two distinct diseases: Crohn's disease (CD) and Ulcerative Colitis (UC), both characterized by chronic inflammation of the intestine, with exacerbation periods followed by long intervals of remission of symptoms. Despite being subject of research for decades, its etiology is still unknown and a single agent or isolated mechanism is not enough to produce or trigger the disease. The difficulty in effectively treat all patients based on the poor response to drug and in the several side effects that the treatments presents, supports the search for new sources of compounds useful in the treatment and prevention of IBD. Among the various strategies available, the research of medicinal plants shows promise. Bidens pilosa L., Asteraceae, is a weed with wide distribution and occurrence in some countries and is known in Brazil as picão-preto. Although it is considered a weed without economic importance, has been used in various populations with medical purpose and its application in various diseases may be due to its chemical composition rich in phytol and polyunsaturated fatty acid (palmitic acid, oleic acid and linoleic acid) compounds known to have anti-inflammatory and/or antioxidants effects. In the present study the supercritical extract of Bidens pilosa L. was able to reduce the levels of pro-inflammatory mediators, such as MPO, IL-1β and TNF-α associated with modulation of anti-inflammatory factors such as IL-10, both in the preventive and curative protocols. Also modulates gene expression of genes related to inflammation and mucosal protection, such as HSP70 and MUC. In addition to the biochemical changes might notice a histological improvement in colonic samples analyzed by electron microscopy. Together with structural changes was an increase in the production and secretion of mucin, mucosal protective agents. Thereby, B.pilosa extract is an important source of compounds which may ...