Internalization of Salmonella by macrophages induces formation of nonreplicating persisters.
Internalization of Salmonella by macrophages induces formation of nonreplicating persisters.
复制标题
通过巨噬细胞对沙门氏菌的内在化会导致形成非复制的持久性。
DOI:
10.1126/science.1244705
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发表时间:
2014-01-10
期刊:
影响因子:
--
通讯作者:
Holden DW
中科院分区:
文献类型:
--
作者:
Helaine S;Cheverton AM;Watson KG;Faure LM;Matthews SA;Holden DW
Many bacterial pathogens cause persistent infections despite repeated antibiotic exposure. Bacterial persisters are antibiotic-tolerant cells, but little is known about their growth status and the signals and pathways leading to their formation in infected tissues. We used fluorescent single-cell analysis to identify Salmonella persisters during infection. These were part of a nonreplicating population formed immediately after uptake by macrophages and were induced by vacuolar acidification and nutritional deprivation, conditions that also induce Salmonella virulence gene expression. The majority of 14 toxin-antitoxin modules contributed to intracellular persister formation. Some persisters resumed intracellular growth after phagocytosis by naïve macrophages. Thus, the vacuolar environment induces phenotypic heterogeneity, leading to either bacterial replication or the formation of nonreplicating persisters that could provide a reservoir for relapsing infection.
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