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      Protective Effects of Extracts and Flavonoids Isolated from Scutia buxifolia Reissek against Chromosome Damage in Human Lymphocytes Exposed to Hydrogen Peroxide

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          Abstract

          Flavonoids are claimed to protect against cardiovascular disease, certain forms of cancer and ageing, possibly by preventing initial DNA damage. Therefore, we investigated the protective effects of crude extract, ethyl acetate fraction and flavonoids (quercetin, quercitrin, isoquercitrin and rutin) isolated from the leaves from Scutia buxifolia against chromosome damage induced by H 2O 2 in human lymphocytes by analyzing cellular growth rate, cell viability, mitotic index and chromosomal instability. We found a differential response among the compounds tested, with the ethyl acetate fraction being more effective than the crude extract, a difference perhaps related to the presence of the antioxidants identified and quantified by HPLC/DAD. In general, quercetin, isoquercitrin and rutin recovered the mitotic index and chromosomal instability more than quercitrin after treatment with hydrogen peroxide.

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          Most cited references28

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          Recommendations for conducting the in vivo alkaline Comet assay. 4th International Comet Assay Workshop.

          The in vivo alkaline single cell gel electrophoresis assay, hereafter the Comet assay, can be used to investigate the genotoxicity of industrial chemicals, biocides, agrochemicals and pharmaceuticals. The major advantages of this assay include the relative ease of application to any tissue of interest, the detection of multiple classes of DNA damage and the generation of data at the level of the single cell. These features give the Comet assay potential advantages over other in vivo test methods, which are limited largely to proliferating cells and/or a single tissue. The Comet assay has demonstrated its reliability in many testing circumstances and is, in general, considered to be acceptable for regulatory purposes. However, despite the considerable data published on the in vivo Comet assay and the general agreement within the international scientific community over many protocol-related issues, it was felt that a document giving detailed practical guidance on the protocol required for regulatory acceptance of the assay was required. In a recent meeting held in conjunction with the 4th International Comet Assay Workshop (Ulm, Germany, 22-25 July 2001) an expert panel reviewed existing data and recent developments of the Comet assay with a view to developing such a document. This paper is intended to act as an update to the more general guidelines which were published as a result of the International Workshop on Genotoxicity Test Procedures. The recommendations are also seen as a major step towards gaining more formal regulatory acceptance of the Comet assay.
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            Antioxidant activity of various extracts and fractions of Chenopodium quinoa and Amaranthus spp. seeds

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              Botanicals in cancer chemoprevention.

              Botanicals have been used for the treatment of various human diseases throughout history. In addition, botanicals play a role in disease prevention. For example, epidemiologic studies have suggested that a reduced risk of cancer is associated with high consumption of vegetables and fruits. Thus, the cancer chemopreventive potential of naturally occurring phytochemicals is of great interest. In this review, we discuss the cancer chemopreventive activity of cruciferous vegetables such as cabbage and broccoli, Allium vegetables such as garlic and onion, green tea, Citrus fruits, tomatoes, berries, ginger and ginseng, as well as some medicinal plants. In addition, methods for the discovery of active compounds from plant sources are described. Several lead compounds, such as brassinin (from cruciferous vegetables like Chinese cabbage), sulforaphane (from broccoli) and its analog sulforamate, withanolides (from tomatillos), and resveratrol (from grapes and peanuts among other foods), are in preclinical or clinical trials for cancer chemoprevention. Phytochemicals of these types have great potential in the fight against human cancer, and a variety of delivery methods are available as a result of their occurrence in nature.

                Author and article information

                Journal
                Molecules
                Molecules
                molecules
                Molecules
                MDPI
                1420-3049
                14 May 2012
                May 2012
                : 17
                : 5
                : 5757-5769
                Affiliations
                [1 ]Program of Post-Graduation in Pharmaceutical Sciences, Federal University of Santa Maria, Campus Camobi, Santa Maria, RS, 97105-900, Brazil
                [2 ]Franciscan University Center – UNIFRA, Andradas Street, 1614, Santa Maria, RS 97010-032, Brazil
                [3 ]Program of Post-Graduation in Pharmacology, Federal University of Santa Maria, Campus Camobi, Santa Maria, RS, 97105-900, Brazil
                [4 ]Federal University of Pampa – UNIPAMPA, Uruguaiana, RS 97500-970, Brazil
                Author notes
                [* ] Author to whom correspondence should be addressed; Email: alineboligon@ 123456hotmail.com ; Tel.: +55-55-3220-9618.
                Article
                molecules-17-05757
                10.3390/molecules17055757
                6268969
                22628047
                cd41df00-3c52-4cfc-95f2-84dffd46f390
                © 2012 by the authors; licensee MDPI, Basel, Switzerland.

                This article is an open-access article distributed under the terms and conditions of the Creative Commons Attribution license ( http://creativecommons.org/licenses/by/3.0/).

                History
                : 26 March 2012
                : 25 April 2012
                : 26 April 2012
                Categories
                Article

                scutia buxifolia,flavonols,lymphocyte culture,chromosomes damage,hplc/dad

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