壳聚糖-葡聚糖硫酸酯水凝胶作为益生菌的潜在载体。
Chitosan-dextran sulfate hydrogels as a potential carrier for probiotics.
机构信息
University of Copenhagen, Department of Food Science, Rolighedsvej 30, DK-1958 Copenhagen, Denmark.
Malmö University, Biomedical Laboratory Science and Biofilm Research Center for Biointerfaces, Faculty of Health and Society, SE-205 06 Malmö, Sweden.
出版信息
Carbohydr Polym. 2017 Sep 15;172:175-183. doi: 10.1016/j.carbpol.2017.04.047. Epub 2017 Apr 22.
Physical and chemical (crosslinked with genipin) hydrogels based on chitosan and dextran sulfate were developed and characterized as novel bio-materials suitable for probiotic encapsulation. The swelling of the hydrogels was dependent on the composition and weakly influenced by the pH of the media. The morphology analysis supports the swelling data showing distinct changes in microstructure depending on the composition. The viability and culturability tests showed approx. 3.6 log CFU/mL decrease of cells (L. acidophilus as model) incorporated into chemical hydrogels when compared to the number of viable native cells. However, the live/dead viability assay evidenced that a considerable amount of viable cells were still entrapped in the hydrogel network and therefore the viability is most likely underestimated. Overall, the developed systems are robust and their structure, rheology and swelling properties can be tuned by changing the blend ratio, thus constituting appealing bio-matrices for cell encapsulation.
基于壳聚糖和葡聚糖硫酸酯的物理化学(与京尼平交联)水凝胶被开发并表征为适合益生菌包封的新型生物材料。水凝胶的溶胀取决于组成,受介质 pH 值的影响较弱。形态分析支持溶胀数据,显示出微观结构的明显变化取决于组成。活力和可培养性测试表明,与天然活细胞的数量相比,掺入化学水凝胶中的细胞(以嗜酸乳杆菌为模型)减少了约 3.6 个对数 CFU/mL。然而,死活活力测定表明,相当数量的活细胞仍被困在水凝胶网络中,因此活力很可能被低估。总的来说,所开发的系统具有稳健性,其结构、流变学和溶胀性能可以通过改变共混比来调节,因此构成了用于细胞包封的有吸引力的生物基质。