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Type: Artigo de periódico
Title: Anti-Ulcerogenic Effect of a Whey Protein Isolate and Collagen Hydrolysates Against Ethanol Ulcerative Lesions on Oral Administration to Rats
Author: Castro, GA
Carvalho, JE
Tinti, SV
Possenti, A
Sgarbieri, VC
Abstract: The effect of the administration of a whey protein isolate (WPI) and collagen hydrolysates on ethanol-induced ulcerative lesions was studied in rats. WPI and bovine or porcine collagen hydrolysate (BCH and PCH, respectively) were given to rats by gavage. In acute experiments, (single-dose) physiological saline (10 mL/kg of body weight) was used as the negative control, and carbenoxolone (200 mg/kg of body weight) was used as a positive control. Ethanol (1 mL per 250-g rat) was also given by gavage. These treatments reduced the ulcerative lesion index (ULI) in a range of 40-77%, depending on the dosage. Some mixtures of WPI with either PCH or BCH provided results that suggested synergisms between WPI and the collagen hydrolysates. For example, WPI/BCH (in the proportion of 375: 375 mg/kg of body weight) decreased ULI by 64%. The mechanism for mucosal protection involved a decrease in plasma gastrin (similar to 40%), a significant increase (50-267%) in mucus production, and a reduction in ULI (percentage) when intragastric administrations were performed after in vivo alkylation by N-ethylmaleimide. Results suggest that gastrin, sulfhydryl substances, and some mechanisms related to mucus production are all involved in gastric ulcer protection against ethanol. The collagen hydrolysates (both PCH and BCH) presented a stronger effect on mucus production; on the other hand, the effect of WPI was also dependent on sulfhydryl compounds, resulting in a more protective effect when the two proteins were administered together.
Subject: anti-ulcer mechanism
mucosa protection
ulcerative lesion
whey protein
Country: EUA
Editor: Mary Ann Liebert Inc
Citation: Journal Of Medicinal Food. Mary Ann Liebert Inc, v. 13, n. 1, n. 83, n. 90, 2010.
Rights: embargo
Identifier DOI: 10.1089/jmf.2008.0277
Date Issue: 2010
Appears in Collections:Unicamp - Artigos e Outros Documentos

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