Augmentation of macrophage phagocytic activity by cell-free extracts of selected lactic acid-producing bacteria.
J Dairy Sci
; 76(9): 2485-92, 1993 Sep.
Article
em En
| MEDLINE
| ID: mdl-8227651
ABSTRACT
Oral and intraperitoneal administration of lactic acid-producing bacteria can significantly augment the immune response in murine models; however, the immunopotentiating effects in these studies differ significantly. Murine macrophagelike cell line J774 was cultured in the presence of cell-free extracts of Lactobacillus acidophilus and Bifidobacterium longum, and the effect on macrophage function was evaluated by measurement of synthesis of selected enzymes and their ability to take up either acrylamide particles or live Salmonella typhimurium. Lysozyme activity of J774 cells was significantly decreased by cell-free extracts of B. longum, but not of L. acidophilus, whereas extracts of both strains induced morphological changes and significantly enhanced phagocytosis of inert particles or viable Salmonella. Whole cell extracts of lactic acid-producing bacteria are therefore capable of altering macrophage function in a strain-dependent manner.
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Coleções:
01-internacional
Base de dados:
MEDLINE
Assunto principal:
Fagocitose
/
Bifidobacterium
/
Lactobacillus acidophilus
/
Macrófagos
Limite:
Animals
Idioma:
En
Revista:
J Dairy Sci
Ano de publicação:
1993
Tipo de documento:
Article