Document Detail

Effect of grape polyphenols on lactic acid bacteria and bifidobacteria growth: Resistance and metabolism.
MedLine Citation:
PMID:  21839384     Owner:  NLM     Status:  In-Data-Review    
Food polyphenols are able to selectively modify the growth of susceptible micro-organisms. This study describes the effect of a flavan-3-ol enriched grape seed extract (GSE) on the growth of several lactic acid bacteria (LAB) and bifidobacteria and the ability of the resistant strains to metabolize these compounds. Streptococcus thermophilus, Lactobacillus fermentum, Lactobacillus acidophilus and Lactobacillus vaginalis strains showed a remarkable sensitivity to the phenolic extracts assayed, including a GSE fraction consisting mainly in (+)-catechin and (-)-epicatechin (GSE-M). On the other hand, Lactobacillus plantarum, Lactobacillus casei, and Lactobacillus bulgaricus strains reached maximal growth with the GSE fractions, including a rich-oligomeric (GSE-O) fraction. Within bifidobacteria, Bifidobacterium lactis BB12 showed the highest sensitivity to the phenolic extracts assayed, whereas Bifidobacterium breve 26M2 and Bifidobacterium bifidum HDD541 reached maximum growth in presence of GSE-O and GSE-M fractions. Metabolism of flavan-3-ols by LAB and bifidobacteria resistant strains was investigated in vitro. The results revealed that only L. plantarum IFPL935 was able to metabolize the polyphenols studied by means of galloyl-esterase, decarboxylase and benzyl alcohol dehydrogenase activities that led to the formation of gallic acid, pyrogallol and catechol, respectively. An unknown metabolite that does not exhibit a phenolic-acid-type structure was also detected, which suggests a new enzyme activity in L. plantarum IFPL935 able to degrade flavan-3-ol monomers.
Raquel Tabasco; Fernando Sánchez-Patán; María Monagas; Begoña Bartolomé; M Victoria Moreno-Arribas; Carmen Peláez; Teresa Requena
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Publication Detail:
Type:  Journal Article     Date:  2011-06-12
Journal Detail:
Title:  Food microbiology     Volume:  28     ISSN:  1095-9998     ISO Abbreviation:  Food Microbiol.     Publication Date:  2011 Oct 
Date Detail:
Created Date:  2011-08-15     Completed Date:  -     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  8601127     Medline TA:  Food Microbiol     Country:  England    
Other Details:
Languages:  eng     Pagination:  1345-52     Citation Subset:  IM    
Copyright Information:
Copyright © 2011 Elsevier Ltd. All rights reserved.
Department of Food Biotechnology and Microbiology, Instituto de Investigación en Ciencias de la Alimentación CIAL (CSIC-UAM), Nicolás Cabrera 9, 28049 Madrid, Spain.
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