为潜在的益生菌Enterococcus faecalis L118开发一种新的冷干燥保护系统,并评估其存储稳定性
Longhao Wang1, Zekai Wang1, Chengcai Zhu1
1College of Animal Science, Anhui Science and Technology University, Fengyang, Anhui, 233100, China.
Cryobiology
|November 22, 2025
概括
寒冷压力和氨酸显著提高了Enterococcus faecalis L118.8的冷干燥生存率. 使用这些与甘油和脱脂牛奶一起使用的新型保护系统提高了稳定性和益生菌性质.
科学领域:
- 微生物学 微生物学
- 生物技术是生物技术.
- 食品科学 食品科学 食品科学
背景情况:
- Enterococcus faecalis L118是一种益生菌细菌,需要有效的保存方法.
- 冷干燥是一种常见的保存技术,但可以降低细菌的生存能力.
- 冷保护剂和预处理方法对于提高冷干燥期间的生存率至关重要.
研究的目的:
- 研究寒冷应激和氨酸对Enterococcus faecalis L118.8.的冷干燥保护作用.
- 开发和优化E. faecalis L118的新型冷干燥保护系统,使用糖和脱脂牛奶.
- 评估优化系统的保护机制和有效性.
主要方法:
- 使用单向ANOVA和响应表面方法 (RSM) 来评估保护效应并优化系统.
- 评估了细胞膜完整性,储存稳定性和益生菌性质.
- 用RT-qPCR分析不同治疗的基因表达变化.
主要成果:
- 寒冷压力 (8小时的8°C) 和氨酸 (1.5%) 显著提高了E. faecalis L118的生存率.
- 优化的系统 (冷压力,1.5%的氨酸,10.4%的脱脂牛奶,9.8%的糖醇) 实现了87.90%的生存率.
- 优化的系统保持了细胞膜完整性,益生菌性质和-20°C的储存稳定性.
- 寒冷压力和氨酸调高了参与细胞保护和新陈代谢的关键基因,在最佳系统中产生协同效应.
结论:
- 在冷干燥过程中,冷压和氨酸作为Enterococcus faecalis L118的有效冷保护剂.
- 一种新的冷干燥保护系统,结合了冷压,氨酸,甘油和脱脂牛奶,显著改善了细菌的生存和质量.
- 这项研究为工业规模保存和生产Enterococcus faecalis L118.8的理论基础.
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