EPISODE · May 24, 2026 · 20 MIN
1021-肠道菌群的全基因组选择性扫荡与演化
from 聊聊Sci
这篇研究揭示了全基因组选择性扫荡（GWSS）是驱动人体肠道微生物群进化的核心机制。研究人员通过分析海量分离株基因组与宏基因组数据，证实了这种机制在至少66个细菌分类群中普遍存在，导致细菌在系统发育树上呈现出独特的“扫荡簇”结构。这些细菌种群具有如同全球性流行病般的传播特性，能在短短数十年内跨越不同地域的人群进行扩散。研究进一步发现，这些遗传单元具有显著的生态分化特征，与宿主的年龄、结直肠癌、2型糖尿病及炎症性肠病等生理健康状态密切相关。通过对重组率与突变积累的建模，该研究为理解肠道菌群如何通过适应性进化占据特定生态位提供了重要的理论基础。References:Yu X A, Strachan C R, Herbold C W, et al. Genome-wide sweeps create ecological units in the human gut microbiome[J]. Nature, 2026: 1-8.前往小宇宙评论区与主播互动
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