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Cellulose Derivatives Enhanced Stability of Alginate-Based Beads Loaded with Lactobacillus plantarum LAB12 against Low pH, High Temperature and Prolonged Storage.
Probiotics and Antimicrobial Proteins 2018 September
The susceptibility of probiotics to low pH and high temperature has limited their use as nutraceuticals. In this study, enhanced protection of probiotics via microencapsulation was achieved. Lactobacillus plantarum LAB12 were immobilised within polymeric matrix comprised of alginate (Alg) with supplementation of cellulose derivatives (methylcellulose (MC), sodium carboxymethyl cellulose (NaCMC) or hydroxypropyl methylcellulose (HPMC)). L. plantarum LAB12 encapsulated in Alg-HPMC(1.0) and Alg-MC(1.0) elicited improved survivability (91%) in simulated gastric conditions and facilitated maximal release (∼100%) in simulated intestinal condition. Alg-HPMC(1.0) and Alg-MC(1.0) significantly reduced (P < 0.05) the viability loss of LAB12 (viability loss <7%) when compared to Alg alone (viability loss <13%) under extreme temperatures (75 and 90 °C). Four-week storage of encapsulated LAB12 at 4 °C yielded viable counts >7 log CFU g-1 . Alg-MC and Alg-HPMC improved the survival of LAB12 against simulated gastric condition (9.24 and 9.55 log CFU g-1 , respectively), temperature up to 90 °C (9.54 and 9.86 log CFU g-1 , respectively) and 4-week of storage at 4 °C (8.61 and 9.23 log CFU g-1 , respectively) with sustained release of probiotic in intestinal condition (>9 log CFU g-1 ). These findings strongly suggest the potential of cellulose derivatives supplemented Alg bead as protective micro-transport for probiotic strains. They can be safely incorporated into new functional food or nutraceutical products.
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