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- W3199525522 abstract "Summary Antibiotics remain one of the most effective methods for controlling bacterial infection. However, the diverse impacts of antimicrobials on bacterial physiology and host immunity remain unclear. A comprehensive antibiotic screen revealed that disruption of thymidine synthesis in Firmicutes with anti-folate antibiotics promoted elevated levels of the bacterial second messenger cyclic di-AMP, and consequently induced host STING activation during infection. Extensive exposure to antibiotics targeting folate synthesis drives the emergence of thymidine-dependent Staphylococcus aureus SCVs (TD-SCVs). Respiratory infections with TD-SCVs are common among children with cystic fibrosis and are associated with worse clinical outcomes, although the underlying pathophysiological mechanisms remain to be defined. Our study reveals that TD-SCV isolates exhibited excessive c-di-AMP production and STING activation in a thymidine-dependent manner. Murine lung infection with TD-SCVs revealed STING-dependent elevation of proinflammatory cytokines, leading to higher airway neutrophil infiltration and activation comparing to normal colony S. aureus and hemin-dependent SCV. Our results suggest the elevated inflammatory capacity of TD-SCVs contribute to their pathogenesis and revealed a new aspect of STING signaling in the airway by characterizing its role in neutrophil recruitment." @default.
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- W3199525522 date "2021-09-14" @default.
- W3199525522 modified "2023-09-24" @default.
- W3199525522 title "Thymidine starvation promotes c-di-AMP dependent inflammation during infection" @default.
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