试图通过突变积累和选择来限制益生菌菌株Bacillus subtilis BG01-4TM的胞形成
Luke M Bosnar1, Anya E Shindler1, Jennifer Wood1
1Department of Physiology, Anatomy and Microbiology, School of Life Sciences, La Trobe University, Melbourne, Victoria 3086, Australia.
Access microbiology
|June 16, 2023
概括
基于子的益生菌提供了优势,但可能会对早产婴儿带有死角性肠球炎 (NEC) 构成风险. 这项研究研究了Bacillus subtilis菌株BG01-4TM及其衍生品BG01-4-8,在后者中发现了改变的胞.
科学领域:
- 微生物学 微生物学
- 胃肠病学 胃肠病学
- 新生儿医学 新生儿医学
背景情况:
- 基于子的益生菌由于子的耐用性,比活体细菌具有优势,使其能够通过胃肠道有效过渡.
- 目前以子为基础的益生菌主要针对成年人;婴儿的肠道系统,特别是早产婴儿患有死肠炎 (NEC),因不成熟和微生物多样性低而有显著差异.
- 子基益生菌在NEC婴儿中的潜在并发症包括休眠子,共生细菌的竞争力和先天抗生素耐药性.
研究的目的:
- 评估Bacillus subtilis BG01-4TM及其衍生品BG01-4-8的分泌特征.
- 评估在与婴儿肠道环境相关的选择性压力下胞基因的稳定性.
主要方法:
- 研究Bacillus subtilis菌株BG01-4TM,最初提供为非子形成,用于胞能力.
- 通过体外检测证实了BG01-4TM的阳性分泌状况.
- 应用选择性压力 (高葡萄糖,低pH值) 来测试分泌基因的耐用性.
- 分析了BG01-4-8衍生菌株与子调节相关的遗传变异.
主要成果:
- 尽管试图对其进行选择,但Bacillus subtilis BG01-4TM仍表现出 Sporulation 能力,证实了关键的 Sporulation 基因的耐用性.
- 衍生菌株BG01-4-8表现出改变的胞调节,比原始菌株BG01-4TM快大约48小时的胞形成.
- 诸如高葡萄糖和低pH等表观遗传因素并没有消除BG01-4TM的子生成能力.
结论:
- 这项研究突出显示了Bacillus subtilis分泌基因的强度,即使在模拟的不利条件下也是如此.
- 菌株BG01-4-8呈现了修改后的化动力学,可能与父菌株相比,提供了不同的治疗特征.
- 需要进行进一步的研究,以了解这些分泌差异对易受伤害的婴儿群体,特别是患有NEC的婴儿群体中益生菌疗效和安全性的影响.
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