Chitosan oligosaccharides, dp 2–8, have prebiotic effect on the Bifidobacterium bifidium and Lactobacillus sp.

干酪乳杆菌 益生元 壳聚糖 化学 双歧杆菌 细菌 低聚糖 乳酸 乳酸菌 食品科学 生物化学 生物 发酵 遗传学
作者
Hyean-Woo Lee,Yoon‐Sun Park,Jong-Soon Jung,Woon‐Seob Shin
出处
期刊:Anaerobe [Elsevier]
卷期号:8 (6): 319-324 被引量:169
标识
DOI:10.1016/s1075-9964(03)00030-1
摘要

In order to investigate the prebiotic potential of chitosan oligosaccharide (COS), prepared by enzymatic hydrolysis of fully deacetylated chitosan polymer, the effect of COS on bacterial growth was studied. The degree of polymerization (dp) of COS was determined by MALDI-ToF mass spectrometry, and the COS was found to be composed of dimer (33.6%), trimer (16.9%), tetramer (15.8%), pentamer (12.4%), hexamer (8.3%), heptamer (7.1%), and octamer (5.9%). The minimum inhibitory concentrations (MIC) of chitosan polymer against lactic acid bacteria and bifidobacteria were below 0.31%. However, this only applied to two strains, the other bacteria tested grew on MRS broth containing 5% COS. The effects of COS on the growth of bifidobacteria and lactic acid bacteria were compared with those of fructo-oligosaccharide (FOS). FOS was found to have a growth stimulatory effect on only three strains: Bifidobacterium bifidium, B. infantis and Lactobacillus casei. However, COS stimulated the growth of most Lactobacillus sp. and B. bifidium KCTC 3440. The amount of the growth and the specific growth rate of B. bifidium increased with increasing COS concentration. The cultivation time required to obtain maximum growth was reduced to about 25% in MRS broth supplemented with 0.2-0.4% COS. These results demonstrate that COS has considerable bifidogenic potential. Both cell growth and specific growth rates of L. brevis in MRS broth supplemented with 0.1% COS increased by 25%. The present study shows that COS stimulates the growth of some enteric bacteria, and that COS has potential use as a prebiotic health-food.
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