1116-肠道微生物组表观遗传相位变异增强细菌适应性 episode artwork

EPISODE · Jun 12, 2026 · 23 MIN

1116-肠道微生物组表观遗传相位变异增强细菌适应性

from 聊聊Sci

这项研究通过分析人类肠道微生物组,揭示了表观遗传相位变异(ePV)在细菌适应环境压力中的关键作用。研究人员利用长读长和短读长宏基因组测序技术,在多种肠道菌群中发现了广泛存在的DNA甲基化动态变化,这些变化与抗生素治疗和粪菌移植密切相关。特别是在嗜黏蛋白阿克曼氏菌(A. muciniphila)中,特定的ePV通过调节mucC基因的表达,显著增强了细菌对阿莫西林的耐受性。这种基于表观遗传的对冲策略(bet-hedging)允许同一菌株在不改变DNA序列的情况下,通过产生表型异质性来适应波动的环境。总之,该发现为理解共生细菌如何通过表观遗传机制实现快速进化与生存适应提供了新的视角。References:Ni M, Junker K, Liu Y, Fan Y, Li Y, Qiao W, Zhang XS, Ksiezarek M, Mead EA, Tourancheau A, Jiang W, Blaser MJ, Valdivia RH, Davey LE, Fang G. Epigenetic phase variation in the gut microbiome enhances bacterial adaptation. Cell Host Microbe. 2026 May 19:S1931-3128(26)00175-7. doi: 10.1016/j.chom.2026.04.019. Epub ahead of print. PMID: 42161263; PMCID: PMC13196444.前往小宇宙评论区与主播互动

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1116-肠道微生物组表观遗传相位变异增强细菌适应性

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