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      Actividad antiinflamatoria y antioxidante de Bauhinia kalbreyeri Harms en un modelo de inflamación intestinal agudo en ratas Translated title: Anti-inflammatory and antioxidant action of Bauhinia kalbreyeri Harms in an acute intestinal inflammation model used in rats

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          Abstract

          Objetivo: evaluar la actividad antiinflamatoria y antioxidante de extractos acuosos de hojas y corteza de Bauhinia kalbreyeri Harms mediante un modelo de inflamación intestinal en ratas. Métodos: se utilizaron ratas Wistar, a las cuales se les indujo inflamación intestinal aguda mediante el uso de indometacina (15 mg/kg). Los extractos se administraron por gavage (40 mg/kg) durante 7 d. Se midieron los niveles enzimáticos de glutatión peroxidasa (GPX/L de sangre), se determinó el índice de actividad de la enfermedad y se realizó una caracterización macroscópica y microscópica de las lesiones. Resultados: se determinó que la administración oral de los extractos tiene un efecto moderado sobre el modelo agudo de enteritis inducida por indometacina, con la disminución concomitante de los parámetros clínicos, patológicos e inflamatorios. Tanto el análisis histológico como el macroscópico de las muestras de animales tratados con extractos, confirmaron el efecto beneficioso ejercido por estos en el modelo de enteritis aguda inducida por indometacina, el cual se atribuye a los metabolitos secundarios presentes en la planta ya que se evidenció recuperación de la citoarquitectura, disminución en el grado de lesión y del índice de actividad de la enfermedad; así como la estabilización de los niveles de glutatión peroxidasa, que aumenta la viabilidad de las fibras de colágeno, evita el daño celular y promueve la síntesis de ADN, para iniciar la recuperación de la lesión. Conclusión: este estudio se muestra como uno de los pioneros en dilucidar la actividad antiinflamatoria y antioxidante de Bauhinia kalbreyeri en un modelo in vivo.

          Translated abstract

          Objective: to evaluate the anti-inflammatory and antioxidant activity of aqueous extracts of leaves and bark from Bauhinia kalbreyeri Harms in an intestinal inflammation model applied to Wistar rats. Methods: the Wistar rats were induced acute intestinal inflammation by using indomethacin (15 mg/kg). The extracts were administered by gavage (40 mg/kg) for 7 days. The enzyme levels of glutathione peroxidase (GPX/L of blood) were measured, the rate of disease activity was estimated, and finally the lesions were macroscopically and microscopically characterized. Results: it was found that oral administration of the extracts has a modest effect on acute enteritis model induced by indomethacin, with concomitant decrease in the clinical parameters and inflammatory disease. Both the macroscopic and histological analysis of samples from the animals treated with extracts confirmed their beneficial effect on the indomethacin-induced acute enteritis model. This effect is attributed to the secondary metabolites in the plant since the experiment evidenced recovery of cytoarchitecture, lower degree of injury, reduced rate of disease activity, as well as stabilization of glutathione peroxidase levels that cause more viability of the collagen fibers, prevent cell damage and encourage DNA synthesis to start recovery from injury. Conclusions: this study seems to be one of the pioneers in elucidating the anti-inflammatory and antioxidant properties of Bauhinia kalbreyeri in an in vivo model.

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          Experimental models of inflammatory bowel disease.

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            Plantas do gênero Bauhinia: composição química e potencial farmacológico

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              Mechanisms of acute and chronic intestinal inflammation induced by indomethacin.

              The objective of this study was to characterize the mechanisms of acute and chronic intestinal mucosal injury and inflammation induced by subcutaneously injected indomethacin (Indo). One injection of Indo (7.5 mg/kg) produced acute injury and inflammation in the distal jejunum and proximal ileum that were maximal at three days and completely resolved within one week. Two daily subcutaneous injections of Indo produced a more extensive and chronic inflammation that lasted in an active form in more than 75% of the rats for at least two weeks. Epithelial injury, as measured by enhanced mucosal permeability, was significantly elevated only at one day in the acute model (one injection) but was persistently elevated in the chronic model (two injections). Bile duct ligation completely attenuated increased mucosal permeability in the acute model, however, depletion of circulating neutrophils had no effect. Neither Indo (0-0.1 mg/ml) nor normal bile was cytotoxic to cultured rat intestinal epithelial cells; however, they synergistically promoted significant cytotoxicity. Bile collected from rats treated with Indo was cytotoxic towards the epithelial cells in a dose-dependent manner. Sulfasalazine and metronidazole (100 mg/kg/day, both) attenuated enhanced mucosal permeability in the chronic model. Massive bacterial translocation into the mesenteric lymph nodes, liver, and spleen following two injections of Indo was significantly attenuated by metronidazole. We conclude that: (1) a single injection of Indo produces acute intestinal mucosal injury and inflammation that resolve completely within three to seven days, whereas two daily injections of Indo produce both acute and chronic injury and inflammation, (2) enterohepatic circulation of Indo is important in promoting the acute phases of injury and inflammation, (3) circulating neutrophils do not play a role in the pathogenesis of this model, and (4) endogenous bacteria play an important role in exacerbating and/or perpetuating the chronic phases of injury and inflammation.
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                Author and article information

                Contributors
                Role: ND
                Role: ND
                Journal
                pla
                Revista Cubana de Plantas Medicinales
                Rev Cubana Plant Med
                ECIMED (Ciudad de la Habana )
                1028-4796
                December 2012
                : 17
                : 4
                : 343-359
                Affiliations
                [1 ] Universidad del Tolima Colombia
                Article
                S1028-47962012000400006
                a1baf5c5-8590-4d17-8c1b-4e8e6238db6b

                http://creativecommons.org/licenses/by/4.0/

                History
                Product

                SciELO Cuba

                Self URI (journal page): http://scielo.sld.cu/scielo.php?script=sci_serial&pid=1028-4796&lng=en
                Categories
                PLANT SCIENCES

                Plant science & Botany
                Bauhinia kalbreyeri,antioxidant activity,anti-inflammatory activity,glutathione peroxidase,inflammatory intestinal disease,rats,actividad antioxidante,actividad antiinflamatoria,glutatión peroxidasa,enfermedad inflamatoria intestinal,ratas

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