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Type: Artigo de periódico
Title: Comparative study of beta-carotene and microencapsulated beta-carotene: Evaluation of their genotoxic and antigenotoxic effects
Author: Aissa, Alexandre Ferro
Pires Bianchi, Maria Lourdes
Ribeiro, Juliana Carvalho
Hernandes, Livia Cristina
de Faria, Adelia Ferreira
Mercadante, Adriana Zerlotti
Greggi Antunes, Lusania Maria
Abstract: beta-Carotene (BC) is one of the natural pigments that is most commonly added to food; however, the utilization of BC is limited due to its instability. Microencapsulation techniques are commonly used because they can protect the microencapsulated material from oxidization. Nevertheless, the properties of the encapsulated compounds must be studied. We compared the antigenotoxic potential of pure and microencapsulated beta-carotene (mBC) in Wistar rats. Two doses of BC or mBC (2.5 or 5.0 mg/kg) were administered by gavage over a period of 14 days. The final gavage was followed by an injection of doxorubicin (DXR). After 24 h the animals were euthanized. The micronucleus test results showed that when both mBC and DXR were given, only the higher dose was antigenotoxic. The results of the comet assay show that when given in association with DXR, mBC had protective effects in the liver. The differences between the results obtained with BC and mBC suggest that possibly the carotenoid biodisponibility was modified by the process of microencapsulation. In conclusion, mBC does not lose its protective properties, but higher doses must be used to observe antigenotoxic effects. This is the first time that the genotoxicity and antigenotoxicity of a microencapsulated compound was evaluated in vivo. (C) 2012 Elsevier Ltd. All rights reserved.
Subject: Genotoxicity
Comet assay
Bone marrow
Editor: Pergamon-Elsevier Science Ltd
Citation: Food and Chemical Toxicology. Pergamon-Elsevier Science Ltd, v.50, n.5, p.1418-1424, 2012
Rights: fechado
Identifier DOI: 10.1016/j.fct.2012.02.030
Date Issue: 2012
Appears in Collections:FEA - Artigos e Outros Documentos

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