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In vitro binding of mutagenic heterocyclic aromatic amines by Bifidobacterium pseudocatenulatum G4.


Citation

Faridnia, Farnaz and Saari, Nazamid and Mustafa, Shuhaimi and Yee, Loong Yik and Abd. Manap, Mohd. Yazid and Shobirin, Anis (2010) In vitro binding of mutagenic heterocyclic aromatic amines by Bifidobacterium pseudocatenulatum G4. Beneficial microbes, 1 (2). pp. 149-154. ISSN 1876-2833

Abstract

Consumption of probiotics has been associated with decreased risk of colon cancer and reported to have antimutagenic/ anti-carcinogenic properties. One possible mechanism for this effect involves physical binding of the mutagenic compounds, such as heterocyclic amines (HCAs), to the bacteria. Therefore, the objective of this study was to examine the binding capacity of bifidobacterial strains of human origin on mutagenic heterocyclic amines which are suspected to play a role in human cancers. In vitro binding of the mutagens Trp-p-2, IQ, MeIQx, 7,8DiMeIQx and PhIP by three bacterial strains in two media of different pH was analysed using high performance liquid chromatography. Bifidobacterium pseudocatenulatum G4 showed the highest decrease in the total HCAs content, followed by Bifidobacterium longum, and Escherichia coli. pH affects binding capacity; the highest binding was obtained at pH 6.8. Gram-positive tested strains were found to be consistently more effective than the gram-negative strain. There were significant decreases in the amount of HCAs in the presence of different cell concentrations of B. pseudocatenulatum G4; the highest decrease was detected at the concentration of 10(10) cfu/ml. The results showed that HCAs were able to bind with all bacterial strains tested in vitro, thus it may be possible to decrease their absorption by human intestine and increase their elimination via faeces.


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Additional Metadata

Item Type: Article
Divisions: Faculty of Biotechnology and Biomolecular Sciences
Publisher: Wageningen Academic Publishers
Keywords: Anti-carcinogenic; Anti-mutagenic; Heterocyclic aromatic amines; Bifidobacterium.
Depositing User: Nida Hidayati Ghazali
Date Deposited: 19 Jul 2013 07:49
Last Modified: 28 Sep 2015 02:01
URI: http://psasir.upm.edu.my/id/eprint/15161
Statistic Details: View Download Statistic

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