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- 저자 : L.K.A.M. Leal (검색결과 2 건)
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S.B. Bezerra,L.K.A.M. Leal,N.A.N. Pinto,A.R. Campos 한국식품영양과학회 2009 Journal of medicinal food Vol.12 No.6
The effects of Matricaria recutita and α-bisabolol, a bioactive component from Chamomile species, were investigated against gastric damage induced by absolute ethanol (96%, 1mL per animal) in rats. The effects of M. recutita extract and α-bisabolol on gastric mucosal damage were assessed by determination of changes in mean gastric lesion area. Mechanistic studies were carried out at with 100mg/kg α-bisabolol. We further examined the possible participation of prostaglandins, nitric oxide, and K+ATP channels in its mechanism. M. recutita reduced gastric damage in all doses tested. α-Bisabolol at oral doses of 50 and 100mg/kg markedly attenuated the gastric lesions induced by ethanol to the extent of 87% and 96%, respectively. Pretreatments with the nitric oxide antagonist N-nitro-l-arginine methyl ester (10mg/kg, i.p.) or with indomethacin, an inhibitor of cyclooxygenase, failed to block effectively the gastroprotective effect of α-bisabolol. Furthermore, the α-bisabolol effect was significantly reduced in rats pretreated with glibenclamide, an inhibitor of K+ATP channel activation. Thus we provide evidence that α-bisabolol reduces the gastric damage induced by ethanol, at least in part, by the mechanism of activation of K+ATP channels.
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Draulio C. Silva,Ana L.P. Freitas,Carla D.S. Pessoa,Regina C.M. Paula,Jacilane X. Mesquita,Luzia K.A.M. Leal,Gerly A.C. Brito,Danilo O. Gonc¸alves,Glauce S.B. Viana 한국식품영양과학회 2011 Journal of medicinal food Vol.14 No.10
Flour made from Passiflora edulis fruit peel has been used in Brazil to treat diabetes. This study evaluated the effects of pectin from P. edulis on rats with alloxan-induced diabetes, on myeloperoxidase release from human neutrophils, and on carrageenan-induced paw edema. In the experiments on carrageenan-induced paw edema, paws were dissected for hematoxylin–eosin staining and immunohistochemistry determinations of tumor necrosis factor-α and inducible nitric oxide synthase. Male Wistar rats were divided into the following groups: diabetic controls and diabetic treated with pectin daily for 5 days (0.5–25 mg/kg orally). Glibenclamide and metformin were used as reference drugs. Forty-eight hours after alloxan administration, blood measures were determined (before treatment) and again 5 days later (after treatment). Pectin decreased blood glucose and triglyceride levels in diabetic rats. Pectin also decreased edema volume and release of myeloperoxidase (0.1–100 μg/mL). It also significantly decreased neutrophil infiltration and partially decreased immunostaining for tumor necrosis factor-α and inducible nitric oxide synthase. In conclusion, these data indicated that pectin, a bioactive compound present in P. edulis, has potential as a useful alternative treatment for type 2 diabetes. Its anti-inflammatory properties are probably involved in its antidiabetic action.
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