title: Effect of Versagel on the growth and metabolic activities of selected lactic acid bacteria.
abstract: In this study, the influence of a protein-based fat replacer, Versagel added at 1% and 2% (w/v) to reconstituted skim milk (RSM), on the growth and metabolic activities of selected strains of yogurt starters (Streptococcus thermophilus and Lactobacillus delbrueckii ssp. bulgaricus) as well as probiotic organisms (Lactobacillus casei, Lactobacillus acidophilus, and Bifidobacterium longum) was examined. Addition of Versagel resulted in significantly improved growth of S. thermophilus and B. longum but inhibited that of L. casei, L. acidophilus, and L. delbrueckii ssp. bulgaricus. This is also reflected in the extent of reduction of pH in RSM with added Versagel by these organisms. Among the biochemical activities, proteolytic activity of all the organisms except B. longum was adversely affected by the presence of Versagel, although the angiotensin-I converting enzyme (ACE) inhibitory and alpha-glucosidase (alpha-glu) inhibitory activities were improved. Versagel at 1% level influenced the growth, while ACE inhibitory and alpha-glu inhibitory activities of the organisms were better at 2% level.
authors.affiliation: Faculty of Health, Engineering and Science, School of Molecular Sciences, Victoria University, Werribee Campus, P.O. Box 14428, Melbourne, Victoria 8001, Australia.
authors.forename: L
authors.initials: L
authors.lastname: Ramchandran
authors.forename: N P
authors.initials: NP
authors.lastname: Shah
mesh_terms: D000806:Angiotensin-Converting Enzyme Inhibitors / Q000378:metabolism; D000818:Animals; D001644:Bifidobacterium / Q000254:growth & development / Q000378:metabolism; D004305:Dose-Response Relationship, Drug; D019358:Fat Substitutes / Q000494:pharmacology*; D005285:Fermentation; D005516:Food Microbiology; D058870:Food, Organic; D065089:Glycoside Hydrolase Inhibitors; D006801:Humans; D006863:Hydrogen-Ion Concentration; D007778:Lactobacillus / Q000254:growth & development* / Q000378:metabolism*; D008892:Milk / Q000737:chemistry* / Q000382:microbiology*; D019936:Probiotics / Q000378:metabolism; D048249:Streptococcus thermophilus / Q000254:growth & development / Q000378:metabolism; D015014:Yogurt / Q000382:microbiology; D000520:alpha-Glucosidases / Q000378:metabolism
chemical_list: D000806:Angiotensin-Converting Enzyme Inhibitors; D019358:Fat Substitutes; D065089:Glycoside Hydrolase Inhibitors; D000520:alpha-Glucosidases