Effect of prebiotics on bacteriocin production and cholesterol lowering activity of Pediococcus acidilactici LAB 5

Abstract

The in vitro influence of three prebiotics viz. mannitol, maltodextrin and sorbitol was evaluated on probiotic aspects like bile salt tolerance, cholesterol lowering efficiency and bacteriocin production of the strain, Pediococcus acidilactici LAB 5 which was isolated from vacuum packed fermented meat product. Optimum temperature for bacteriocin production in MRS medium was 37°C. The strain deconjugated bile salt (sodium taurocholate) to 607.66 ± 10.894 μg/ml from initial bile salt concentration 3 mg/ml. In vitro cholesterol removal capability of the strain P. acidilactici LAB 5 was 62 ± 2.742 μg/ml. Prebiotic sorbitol had a positive influence on the probiotic parameters like better cell growth, bacteriocin production and cholesterol removal capability. Anaerobic condition had influenced largely on bile salt deconjugation, cholesterol removal and bacteriocin production. Synbiotic treatment of P. acidilactici LAB 5 with sorbitol for 1 month lowered the plasma cholesterol level to 176.34 ± 12.66 μg/ml in comparison to untreated one (208.76 ± 20.27 μg/ml) in Swiss albino mice. Intestinal adherence of P. acidilactici LAB 5 was also more in synbiotic condition than only in probiotic and control treatments.