INLAIN   20354
INSTITUTO DE LACTOLOGIA INDUSTRIAL
Unidad Ejecutora - UE
artículos
Título:
Effect of a sublethal high-pressure homogenization treatment on the fatty acid membrane composition of probiotic lactobacilli
Autor/es:
TABANELLI, G.; PATRIGNANI, F; GARDINI, F.; VINDEROLA G; REINHEIMER J; GRAZIA, L.; LANCIOTTI, R.
Revista:
journal applied micrbiology
Editorial:
SFAM
Referencias:
Lugar: New York; Año: 2014 vol. 58 p. 109 - 109
ISSN:
1365-2672
Resumen:
High-pressure homogenization (HPH) has been proposed to be applied directly to lactic acid bacterial cells at sublethal levels to enhance some functional properties. As the principal target of HPH are the cell surface envelope structures, the aim of this work was to study the effect of a HPH treatment, applied at 50 MPa, on cell membrane stress responses of alreadyknown functional strains, isolated from Argentinean products. Specifically, the membrane fatty acid composition of cells before and after the sublethal treatment was investigated, and the results showed that plasma membranes, their level of unsaturation and their composition are involved in response mechanisms adopted by microbial cells when subjected to a sublethal HPH stress. In fact, the data obtained demonstrated that the treatment was able to modify the fatty acid profile of the different strains, although a uniform response was not observed. Further studies are necessary both to elucidate the role of each fatty acid in the cell response mechanisms and to clarify the changes in membrane compositions induced by HPH treatment also in relation to the applicative potential of this technique.