Optimization of cholesterol removal by probiotics in the presence of prebiotics by using a response surface method

[thumbnail of (1895)RSM_292_cholesterol.pdf]
Restricted to Repository staff only

Liong, Min Tze and Shah, Nagendra P (2005) Optimization of cholesterol removal by probiotics in the presence of prebiotics by using a response surface method. Applied and environmental microbiology, 71 (4). pp. 1745-1753. ISSN 0099-2240


Lactobacillus casei ASCC 292 was grown in the presence of six prebiotics, namely, sorbitol, mannitol, maltodextrin, high-amylose maize, fructooligosaccharide (FOS), and inulin, in order to determine the combination of probiotic and prebiotics that would remove the highest level of cholesterol. A first-order model showed that the combination of L. casei ASCC 292, FOS, and maltodextrin was the most efficient for the removal of cholesterol, and the optimum experimental region was developed by using the steepest ascent. This led to the middle points of probiotic (1.70% [wt/vol]), FOS (4.80% [wt/vol]), and maltodextrin (6.80% [wt/vol]) for the development of a central composite design for optimization. Perturbation plot, response surface, and coefficient estimates showed that all three factors had significant quadratic effects on cholesterol removal, with FOS showing the most conspicuous quadratic change. A second-order polynomial regression model estimated that the optimum condition of the factors for cholesterol removal by L. casei ASCC 292 is 1.71% (wt/vol) probiotic, 4.95% (wt/vol) FOS, and 6.62% (wt/vol) maltodextrin. Validation experiments showed that the predicted optimum conditions were more efficient than the high and low levels of the factors and the center points. A response surface method proved reliable for developing the model, optimizing factors, and analyzing interaction effects. Analyses of growth, substrate utilization, growth yield, mean doubling time, and short-chain fatty acid (SCFA) production by the use of quadratic models indicated that cholesterol removal was growth associated. The concentration of L. casei ASCC 292 had the most significant quadratic effect on all responses studied, except for substrate utilization and SCFA production, which were significantly (P < 0.05) influenced by the interactions between the probiotic and both prebiotics, indicating that they were closely associated with the uptake of prebiotics.

Dimensions Badge

Altmetric Badge

Item type Article
URI https://vuir.vu.edu.au/id/eprint/1895
DOI 10.1128/AEM.71.4.1745-1753.2005
Subjects Historical > RFCD Classification > 210000 Science-General
Historical > Faculty/School/Research Centre/Department > School of Engineering and Science
Keywords carbohydrates metabolism, cholesterol metabolism, lactobacillus casei growth and development, models, biological, probiotics metabolism
Citations in Scopus 61 - View on Scopus
Download/View statistics View download statistics for this item

Search Google Scholar

Repository staff login