确定优化生长培养基和冷冻保护添加剂以促进……的生长和存活

Determination of Optimized Growth Medium and Cryoprotective Additives to Enhance the Growth and Survival of .

作者信息

Yeo Soyoung, Shin Hee Sung, Lee Hye Won, Hong Doseon, Park Hyunjoon, Holzapfel Wilhelm, Kim Eun Bae, Huh Chul Sung

机构信息

Research Institute of Eco-friendly Livestock Science, Institute of Green-Bio Science and Technology, Seoul National University, Pyeongchang 25354, Republic of Korea.

Graduate School of International Agricultural Technology, Seoul National University, Pyeongchang 25354, Republic of Korea.

出版信息

J Microbiol Biotechnol. 2018 May 28;28(5):718-731. doi: 10.4014/jmb.1801.01059.

Abstract

The beneficial effects of lactic acid bacteria (LAB) have been intensively investigated in recent decades with special focus on modulation of the host intestinal microbiota. Numerous discoveries of effective probiotics are driven by a significantly increasing demand for dietary supplements. Consequently, technological advances in the large-scale production and lyophilization are needed by probiotic-related industries for producing probiotic LAB for commercial use. Our study had a dual objective, to determine the optimum growth medium composition and to investigate appropriate cryoprotective additives (CPAs) for , and compare its responses with other species. The one-factor-at-a-time method and central composite design were applied to determine the optimal medium composition for cultivation. The following composition of the medium was established (per liter): 21.64 g maltose, 85 g yeast extract, 1.21 ml Tween 80, 6 g sodium acetate, 0.2 g MgSO₄∙7H₂O, 0.02 g MnSO₄∙H₂O, 1 g K₂HPO₄, 1.5 g KH₂PO₄, 0.01 g FeSO₄∙7H₂O, and 1 g sodium citrate. A cryoprotective additive combination comprising 10% (w/v) skim milk and 10% (w/v) sucrose supplemented with 2.5% (w/v) sodium glutamate was selected for , and its effectiveness was confirmed using culture-independent methods in the freeze-dried cells of the strains. In conclusion, the optimized medium enhanced the species-specific cultivation of . On the other hand, the cryoprotective effects of the selected CPA mixture may also be dependent on the bacterial strain. This study highlights the necessity for precise and advanced processing techniques for large-scale production of probiotics in the food and feed industries.

摘要

近几十年来,人们对乳酸菌(LAB)的有益作用进行了深入研究,特别关注其对宿主肠道微生物群的调节作用。对膳食补充剂的需求显著增加,推动了众多有效益生菌的发现。因此,益生菌相关产业需要大规模生产和冻干方面的技术进步,以生产用于商业用途的益生菌LAB。我们的研究有两个目标,一是确定最佳生长培养基组成,二是研究适合的冷冻保护添加剂(CPA),并将其反应与其他物种进行比较。采用一次一因子法和中心复合设计来确定培养的最佳培养基组成。确定了以下培养基组成(每升):21.64克麦芽糖、85克酵母提取物、1.21毫升吐温80、6克醋酸钠、0.2克MgSO₄∙7H₂O、0.02克MnSO₄∙H₂O、1克K₂HPO₄、1.5克KH₂PO₄、0.01克FeSO₄∙7H₂O和1克柠檬酸钠。为选择了一种由10%(w/v)脱脂牛奶和10%(w/v)蔗糖组成,并添加2.5%(w/v)谷氨酸钠的冷冻保护添加剂组合,并使用非培养方法在该菌株的冻干细胞中证实了其有效性。总之,优化后的培养基增强了该物种的特异性培养。另一方面,所选CPA混合物的冷冻保护效果也可能取决于细菌菌株。这项研究强调了食品和饲料行业大规模生产益生菌时精确和先进加工技术的必要性。

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