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首页> 外文期刊>Proceedings of the National Academy of Sciences of the United States of America >Listens monocytogenes transiently alters mitochondrial dynamics during infection
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Listens monocytogenes transiently alters mitochondrial dynamics during infection

机译:听单核细胞增生因子在感染过程中短暂改变线粒体动力学

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摘要

Mitochondria are essential and highly dynamic organelles, constantly undergoing fusion and fission. We analyzed mitochondrial dynamics during infection with the human bacterial pathogen Listeria monocytogenes and show that this infection profoundly alters mitochondrial dynamics by causing transient mitochondrial network fragmentation. Mitochondrial fragmentation is specific to pathogenic Listeria monocytogenes, and it is not observed with the nonpathogenic Listeria innocua species or several other intra-cellular pathogens. Strikingly, the efficiency of Listeria infection is affected in cells where either mitochondrial fusion or fission has been altered by siRNA treatment, highlighting the relevance of mitochondrial dynamics for Listeria infection. We identified the secreted pore-forming toxin listeriolysin O as the bacterial factor mainly responsible for mitochondrial network disruption and mitochondrial function modulation. Together, our results suggest that the transient shutdown of mitochondrial function and dynamics represents a strategy used by Listeria at the onset of infection to interfere with cellular physiology.
机译:线粒体是必不可少且高度动态的细胞器,不断发生融合和裂变。我们分析了人类细菌病原体单核细胞增生性李斯特菌感染过程中的线粒体动力学,并显示这种感染通过引起短暂的线粒体网络断裂而深刻改变了线粒体动力学。线粒体片段化是致病性单核细胞增生性李斯特菌特有的,在非致病性李斯特氏菌或其他几种细胞内病原体中未观察到。令人惊讶的是,在通过siRNA处理改变了线粒体融合或裂变的细胞中,李斯特菌感染的效率受到影响,这突显了线粒体动力学与李斯特菌感染的相关性。我们确定分泌的成孔毒素李斯特菌溶血素O是主要负责线粒体网络破坏和线粒体功能调节的细菌因子。总之,我们的结果表明,线粒体功能和动力学的暂时关闭代表了李斯特菌在感染开始时所使用的干扰细胞生理的策略。

著录项

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  • 作者单位

    Unite des Interactions Bacteries-Cellules, Institut Pasteur U604, Institut National de la Sante et de la Recherche Medicale, 75015 Paris, France USC2020, Institut National de la Recherche Agronomique, 75015 Paris, France;

    Institut Cochin de la Sante et de la Recherche Medicale U1016 Institut National de la Sante et de la Recherche Medicale U1016 Centre National de la Recherche Scientifique Unite Mixte de Recherche 8104, Universite Paris Descartes, 75014 Paris, France;

    Plate-Forme de Microscopie Ultrastructurale, Imagopole, Institut Pasteur, Unite de Recherche Associee 2185 75015 Paris, France;

    Institut Cochin de la Sante et de la Recherche Medicale U1016 Institut National de la Sante et de la Recherche Medicale U1016 Centre National de la Recherche Scientifique Unite Mixte de Recherche 8104, Universite Paris Descartes, 75014 Paris, France;

    Unite des Interactions Bacteries-Cellules, Institut Pasteur U604, Institut National de la Sante et de la Recherche Medicale, 75015 Paris, France USC2020, Institut National de la Recherche Agronomique, 75015 Paris, France;

  • 收录信息 美国《科学引文索引》(SCI);美国《生物学医学文摘》(MEDLINE);美国《化学文摘》(CA);
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    bacterial infection; calcium influx; bioenergetics;

    机译:细菌感染;钙流入生物能学;

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