Lactobacillusgrowth and membrane composition in the presence of linoleic or conjugated linoleic acid
| Autor: | Julie Kay Jenkins, Polly D Courtney |
|---|---|
| Rok vydání: | 2003 |
| Předmět: |
Chromatography
Gas Linoleic acid Conjugated linoleic acid Immunology Applied Microbiology and Biotechnology Microbiology chemistry.chemical_compound Lactobacillus Genetics Animals Molecular Biology chemistry.chemical_classification Growth medium biology Cell Membrane Fatty Acids food and beverages Fatty acid General Medicine Lactobacillaceae biology.organism_classification Culture Media Lactobacillus reuteri Intestines Milk Linoleic Acids chemistry Biochemistry Bacteria |
| Zdroj: | Canadian Journal of Microbiology. 49:51-57 |
| ISSN: | 1480-3275 0008-4166 |
| DOI: | 10.1139/w03-003 |
| Popis: | 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.Key words: Lactobacillus, conjugated linoleic acid, linoleic acid, cell membrane. |
| Databáze: | OpenAIRE |
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