TNF-alfa, IL1-beta and IL-8 expressions in ileal mucosa of Crohn s disease patients using mesalazine or azathioprine / Estudo comparativo das expressões de TNF-alfa, IL1-beta e IL-8 na mucosa ileal de portadores da Doença de Crohn em uso de mesalazina ou azatioprina

AUTOR(ES)
DATA DE PUBLICAÇÃO

2009

RESUMO

Crohn s disease is an inflammatory bowel disease that is not currently understood. Much research is being carried out in order to comprehend its mechanisms of lesion and the inflammatory mediators involved in this disease. New advances in molecular biology have opened up new possibilities for further understanding this intricate pathology, yet, some doubts remain. Objective: To evaluate the expressions of TNF-a, IL-1ß and IL-8 in terminal ileum biopsies from patients with Crohn s disease in treatment with mesalazine and azathioprine, and compare these expressions. Patients and Methods: 25 patients from the Inflammatory Bowel Disease Ambulatory from the Clinic Hospital of the University of Campinas, who were submitted to colonoscopy or ileal resection and plastic surgery, were randomly selected. Biopsies from the terminal ileum were obtained and sent for imunoblotting analysis in order to determine the expressions of the proteins studied. Seven of the patients were taking mesalazine, while nine were on azathioprine and expressions were all compared to those of nine healthy controls. Results: No statistical difference was found between the expressions of TNF-a amongst the three groups. In contrast, IL1- ß and IL-8 were found in different levels of expression in the group taking azathioprine when compared to the mesalazine group and control (p<0, 05). Conclusion: Patients chronically taking azathioprine demonstrate higher levels of expression of the inflammatory mediators, IL1- ß and IL-8, in terminal ileum biopsies, when compared to mesalazine treated and healthy counterparts. This effect could be due the inhibition of these proteins expression induced by mesalazine, cooling down bowel s inflammatory activity back to normal

ASSUNTO(S)

azatioprina crohn disease azathioprine doença de cirurgia crohn surgery

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