选择性压力下的益生菌:新的见解和生物安全挑战
V M Chernov1, O A Chernova1, M I Markelova2
1Kazan Institute of Biochemistry and Biophysics, FRC Kazan Scientific Center of Russian Academy of Sciences, Kazan, Russia.
Archives of Razi Institute
|July 2, 2025
概括
新技术揭示了细菌基因组的可塑性和毒性演变. 了解共生细菌,特别是益生菌,是非常重要的,因为它们有可能改变宿主相互作用和免疫力,需要进行安全评估.
科学领域:
- 微生物学和分子生物学
- 基因组学和生物信息学
- 主体与微生物的相互作用
背景情况:
- 高分辨率物理化学技术和奥米克技术的进步使得细菌在压力下生存机制的详细研究成为可能.
- 研究已经突出显著的细菌基因组可塑性和病毒性进化的潜力,影响我们对细菌防御策略的理解.
- 新的发现需要将重点从病原体转向作为益生菌广泛使用的共生细菌.
研究的目的:
- 探索细菌在各种压力因素下生存的机制,包括生物和非生物影响.
- 研究微生物的基因组可塑性和病毒性进化的潜力,特别是共生细菌.
- 解决关于共生细菌和宿主生物之间的相互作用的知识差距,并强调需要标准化益生菌安全评估.
主要方法:
- 整合omics技术 (基因组学,转录组学等) 的使用. 使用先进的物理化学方法.
- 在菌培养,微生物群落和复杂的全生物系统中分析细菌反应.
- 对比基因组学和实验进化研究,以评估基因组的可塑性和毒性.
主要成果:
- 在微生物中表现出高的基因组可塑性,表明适应和进化的强大能力.
- 确定了细菌毒性在选择性压力下进化的潜力,即使在开始性物种中也是如此.
- 揭示了共生动物可以调节宿主细胞信号,抑制天生的免疫力,并破坏宿主平衡.
结论:
- 对共生细菌的全面研究对于了解它们的可塑性,与宿主监管网络的相互作用以及对健康的潜在影响至关重要.
- 目前对共生生物及其真核细胞相互作用的"生命逻辑"的知识不足,可能会危及实际应用.
- 迫切需要对益生菌的安全性评估进行标准化,因为该益生菌在开始性细菌中已经证明了毒性演变和宿主相互作用调节的潜力.
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