Transposon Mutagenesis Screen of Klebsiella pneumoniae Identifies Multiple Genes Important for Resisting Antimicrobial Activities of Neutrophils in Mice
| العنوان: | Transposon Mutagenesis Screen of Klebsiella pneumoniae Identifies Multiple Genes Important for Resisting Antimicrobial Activities of Neutrophils in Mice |
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| المؤلفون: | David W. Lazinski, Anne L. McCabe, Joan Mecsas, Michelle K. Paczosa, Colin H. McLeish, Rebecca J. Silver, Albert K. Tai |
| المصدر: | Infect Immun |
| بيانات النشر: | American Society for Microbiology, 2020. |
| سنة النشر: | 2020 |
| مصطلحات موضوعية: | Transposable element, Klebsiella, Neutrophils, Virulence Factors, Klebsiella pneumoniae, Immunology, Mutant, Virulence, Microbiology, Mice, Pneumonia, Bacterial, Animals, Genetic Testing, Gene, Pathogen, biology, biology.organism_classification, Molecular Pathogenesis, Klebsiella Infections, respiratory tract diseases, Disease Models, Animal, Mutagenesis, Insertional, Infectious Diseases, Host-Pathogen Interactions, DNA Transposable Elements, Parasitology, Transposon mutagenesis |
| الوصف: | Klebsiella pneumoniae is a Gram-negative bacterial pathogen that causes a range of infections, including pneumonias, urinary tract infections, and septicemia, in otherwise healthy and immunocompromised patients. K. pneumoniae has become an increasing concern due to the rise and spread of antibiotic-resistant and hypervirulent strains. However, its virulence determinants remain understudied. To identify novel K. pneumoniae virulence factors needed to cause pneumonia, a high-throughput screen was performed with an arrayed library of over 13,000 K. pneumoniae transposon insertion mutants in the lungs of wild-type (WT) and neutropenic mice using transposon sequencing (Tn-seq). Insertions in 166 genes resulted in K. pneumoniae mutants that were significantly less fit in the lungs of WT mice than in those of neutropenic mice. Of these, mutants with insertions in 51 genes still had significant defects in neutropenic mice, while mutants with insertions in 52 genes recovered significantly. In vitro screens using a minilibrary of K. pneumoniae transposon mutants identified putative functions for a subset of these genes, including in capsule content and resistance to reactive oxygen and nitrogen species. Lung infections in mice confirmed roles in K. pneumoniae virulence for the ΔdedA, ΔdsbC, ΔgntR, Δwzm-wzt, ΔyaaA, and ΔycgE mutants, all of which were defective in either capsule content or growth in reactive oxygen or nitrogen species. The fitness of the ΔdedA, ΔdsbC, ΔgntR, ΔyaaA, and ΔycgE mutants was higher in neutropenic mouse lungs, indicating that these genes encode proteins that protect K. pneumoniae against neutrophil-related effector functions. |
| تدمد: | 1098-5522 0019-9567 |
| URL الوصول: | https://explore.openaire.eu/search/publication?articleId=doi_dedup___::f56254917c1e13147f2413f91c1a6771 https://doi.org/10.1128/iai.00034-20 |
| حقوق: | OPEN |
| رقم الأكسشن: | edsair.doi.dedup.....f56254917c1e13147f2413f91c1a6771 |
| قاعدة البيانات: | OpenAIRE |
| تدمد: | 10985522 00199567 |
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