EPISODE · Dec 30, 2025 · 19 MIN
347-质粒的细胞内竞争及其进化动态
from 聊聊Sci
这篇研究文章探讨了进化过程中生物组织层面之间不可避免的冲突，特别是基因、细胞和种群等层面的冲突。作者们使用质粒：细菌宿主中普遍存在的自复制遗传元件作为理想的模型系统，来研究跨尺度冲突的动态，因为质粒在宿主细胞内部和之间都会进行竞争。研究人员开发了一种基于合成二聚体分裂的新方法，并结合微流控“母机”设备，首次成功地隔离并定量测量了质粒在细胞内部的竞争动态。实验结果揭示了转录活性会降低质粒的细胞内适应度，且质粒的转录和翻译活动共同决定了细胞内和细胞间选择的权衡，突显了遗传优势在塑造质粒种群动态中的复杂作用。References: Rossine F, Sanchez C, Eaton D, et al. Intracellular competition shapes plasmid population dynamics[J]. bioRxiv, 2025.前往小宇宙评论区与主播互动
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347-质粒的细胞内竞争及其进化动态
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