Document Detail

Lactobacillus growth and membrane composition in the presence of linoleic or conjugated linoleic acid.
MedLine Citation:
PMID:  12674348     Owner:  NLM     Status:  MEDLINE    
Five Lactobacillus strains of intestinal and food origins were grown in MRS broth or milk containing various concentrations of linoleic acid or conjugated linoleic acid (CLA). The fatty acids had bacteriostatic, bacteriocidal, or no effect depending on bacterial strain, fatty acid concentration, fatty acid type, and growth medium. Both fatty acids displayed dose-dependent inhibition. All strains were inhibited to a greater extent by the fatty acids in broth than in milk. The CLA isomer mixture was less inhibitory than linoleic acid. Lactobacillus reuteri ATCC 55739, a strain capable of isomerizing linoleic acid to CLA, was the most inhibited strain by the presence of linoleic acid in broth or milk. In contrast, a member of the same species, L. reuteri ATCC 23272, was the least inhibited strain by linoleic acid and CLA. All strains increased membrane linoleic acid or CLA levels when grown with exogenous fatty acid. Lactobacillus reuteri ATCC 55739 had substantial CLA in the membrane when the growth medium was supplemented with linoleic acid. No association between level of fatty acid incorporation into the membrane and inhibition by that fatty acid was observed.
Julie K Jenkins; Polly D Courtney
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Publication Detail:
Type:  Journal Article; Research Support, Non-U.S. Gov't    
Journal Detail:
Title:  Canadian journal of microbiology     Volume:  49     ISSN:  0008-4166     ISO Abbreviation:  Can. J. Microbiol.     Publication Date:  2003 Jan 
Date Detail:
Created Date:  2003-04-03     Completed Date:  2003-05-15     Revised Date:  2006-11-15    
Medline Journal Info:
Nlm Unique ID:  0372707     Medline TA:  Can J Microbiol     Country:  Canada    
Other Details:
Languages:  eng     Pagination:  51-7     Citation Subset:  IM    
Department of Food Science and Technology, Ohio State University, 2015 Fyffe Court, Columbus, OH 43210, USA.
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MeSH Terms
Cell Membrane / chemistry,  drug effects*
Chromatography, Gas
Culture Media
Fatty Acids / analysis
Intestines / microbiology
Lactobacillus / drug effects*,  growth & development,  metabolism
Linoleic Acids / metabolism,  pharmacology*
Milk / metabolism*
Reg. No./Substance:
0/Culture Media; 0/Fatty Acids; 0/Linoleic Acids

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine

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