Identification of Novel Genes Involved in Escherichia coli Persistence to Tosufloxacin
Persisters are metabolically quiescent phenotypic variants of the wild type that are tolerant to cidal antibiotics, and the mechanisms of persister formation and survival are complex and not completely understood. To identify genes involved in persistence to tosufloxacin, which has higher activity a...
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Frontiers Media S.A.
2020-09-01
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| Series: | Frontiers in Cellular and Infection Microbiology |
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| Online Access: | https://www.frontiersin.org/article/10.3389/fcimb.2020.581986/full |
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| author | Tuodi Li Juan Wang Qianqian Cao Fei Li Jiangyuan Han Bingdong Zhu Ying Zhang Hongxia Niu |
| author_facet | Tuodi Li Juan Wang Qianqian Cao Fei Li Jiangyuan Han Bingdong Zhu Ying Zhang Hongxia Niu |
| author_sort | Tuodi Li |
| collection | DOAJ |
| description | Persisters are metabolically quiescent phenotypic variants of the wild type that are tolerant to cidal antibiotics, and the mechanisms of persister formation and survival are complex and not completely understood. To identify genes involved in persistence to tosufloxacin, which has higher activity against persisters than most other quinolones, we screened the E. coli KEIO mutant library using a different condition from most persister mutant screens (6 h) with a longer exposure of 18 h with tosufloxacin. We identified 18 mutants (acrA, acrB, ddlB, dnaG, gltI, hlpA, lpcA, recG, recN, rfaH, ruvC, surA, tatC, tolQ, uvrD, xseA, and ydfI) that failed to form tosufloxacin tolerant persisters. Among them, gltI, hlpA, ruvC, ddlB, ydfI, and tatC are unique genes involved in E. coli persistence to tosufloxacin which have not been reported before. Furthermore, deletion mutants in genes coding periplasmic proteins (surA, lpcA, hlpA, and gltI) had more defect in persistence to tosufloxacin than the other identified mutants, with surA and lpcA mutants being the most prominent. The “deep” persister phenotype of surA and lpcA mutants was further confirmed both in vitro and in vivo. Compared with the wild type strain E. coli BW25113 in vitro, the persister phenotype of the surA and lpcA mutants was decreased more than 100–1,000-fold in persistence to various antibiotics, acidic, hyperosmotic and heat conditions. In addition, in both stationary phase bacteria and biofilm bacteria infection mouse models, the surA and lpcA mutants had lower survival and persistence than the parent uropathogenic strain UTI89, suggesting that the in vitro identified persister mechanisms (surA and lpcA) are operative and valid for in vivo persistence. Our findings provide new insight into the mechanisms of persister formation and maintenance under tosufloxacin and will likely provide novel therapeutic and vaccine targets for developing more effective treatment and prevention of persistent E. coli infections. |
| first_indexed | 2024-12-20T21:19:57Z |
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| id | doaj.art-f27e783f78ea47bebb74724a6866711d |
| institution | Directory Open Access Journal |
| issn | 2235-2988 |
| language | English |
| last_indexed | 2024-12-20T21:19:57Z |
| publishDate | 2020-09-01 |
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| spelling | doaj.art-f27e783f78ea47bebb74724a6866711d2022-12-21T19:26:18ZengFrontiers Media S.A.Frontiers in Cellular and Infection Microbiology2235-29882020-09-011010.3389/fcimb.2020.581986581986Identification of Novel Genes Involved in Escherichia coli Persistence to TosufloxacinTuodi Li0Juan Wang1Qianqian Cao2Fei Li3Jiangyuan Han4Bingdong Zhu5Ying Zhang6Hongxia Niu7Institute of Pathogenic Biology, School of Basic Medical Sciences, Lanzhou University, Lanzhou, ChinaInstitute of Pathogenic Biology, School of Basic Medical Sciences, Lanzhou University, Lanzhou, ChinaInstitute of Pathogenic Biology, School of Basic Medical Sciences, Lanzhou University, Lanzhou, ChinaInstitute of Pathogenic Biology, School of Basic Medical Sciences, Lanzhou University, Lanzhou, ChinaInstitute of Pathogenic Biology, School of Basic Medical Sciences, Lanzhou University, Lanzhou, ChinaInstitute of Pathogenic Biology, School of Basic Medical Sciences, Lanzhou University, Lanzhou, ChinaDepartment of Molecular Microbiology and Immunology, Bloomberg School of Public Health, Johns Hopkins University, Baltimore, MD, United StatesInstitute of Pathogenic Biology, School of Basic Medical Sciences, Lanzhou University, Lanzhou, ChinaPersisters are metabolically quiescent phenotypic variants of the wild type that are tolerant to cidal antibiotics, and the mechanisms of persister formation and survival are complex and not completely understood. To identify genes involved in persistence to tosufloxacin, which has higher activity against persisters than most other quinolones, we screened the E. coli KEIO mutant library using a different condition from most persister mutant screens (6 h) with a longer exposure of 18 h with tosufloxacin. We identified 18 mutants (acrA, acrB, ddlB, dnaG, gltI, hlpA, lpcA, recG, recN, rfaH, ruvC, surA, tatC, tolQ, uvrD, xseA, and ydfI) that failed to form tosufloxacin tolerant persisters. Among them, gltI, hlpA, ruvC, ddlB, ydfI, and tatC are unique genes involved in E. coli persistence to tosufloxacin which have not been reported before. Furthermore, deletion mutants in genes coding periplasmic proteins (surA, lpcA, hlpA, and gltI) had more defect in persistence to tosufloxacin than the other identified mutants, with surA and lpcA mutants being the most prominent. The “deep” persister phenotype of surA and lpcA mutants was further confirmed both in vitro and in vivo. Compared with the wild type strain E. coli BW25113 in vitro, the persister phenotype of the surA and lpcA mutants was decreased more than 100–1,000-fold in persistence to various antibiotics, acidic, hyperosmotic and heat conditions. In addition, in both stationary phase bacteria and biofilm bacteria infection mouse models, the surA and lpcA mutants had lower survival and persistence than the parent uropathogenic strain UTI89, suggesting that the in vitro identified persister mechanisms (surA and lpcA) are operative and valid for in vivo persistence. Our findings provide new insight into the mechanisms of persister formation and maintenance under tosufloxacin and will likely provide novel therapeutic and vaccine targets for developing more effective treatment and prevention of persistent E. coli infections.https://www.frontiersin.org/article/10.3389/fcimb.2020.581986/fullEscherichia colipersistencetosufloxacinpersistermolecular mechanism |
| spellingShingle | Tuodi Li Juan Wang Qianqian Cao Fei Li Jiangyuan Han Bingdong Zhu Ying Zhang Hongxia Niu Identification of Novel Genes Involved in Escherichia coli Persistence to Tosufloxacin Frontiers in Cellular and Infection Microbiology Escherichia coli persistence tosufloxacin persister molecular mechanism |
| title | Identification of Novel Genes Involved in Escherichia coli Persistence to Tosufloxacin |
| title_full | Identification of Novel Genes Involved in Escherichia coli Persistence to Tosufloxacin |
| title_fullStr | Identification of Novel Genes Involved in Escherichia coli Persistence to Tosufloxacin |
| title_full_unstemmed | Identification of Novel Genes Involved in Escherichia coli Persistence to Tosufloxacin |
| title_short | Identification of Novel Genes Involved in Escherichia coli Persistence to Tosufloxacin |
| title_sort | identification of novel genes involved in escherichia coli persistence to tosufloxacin |
| topic | Escherichia coli persistence tosufloxacin persister molecular mechanism |
| url | https://www.frontiersin.org/article/10.3389/fcimb.2020.581986/full |
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