Piggybacking on Niche Adaptation Improves the Maintenance of Multidrug-Resistance Plasmids.

Piggybacking on Niche Adaptation Improves the Maintenance of Multidrug-Resistance Plasmids.
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DOI:
10.1093/molbev/msab091
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发表时间:
2021-07-29
影响因子:
10.7
通讯作者:
Johnsen PJ
Johnsen PJ
中科院分区:
生物学1区
文献类型:
--
作者:
Kloos J;Gama JA;Hegstad J;Samuelsen Ø;Johnsen PJ

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The persistence of plasmids in bacterial populations represents a puzzling evolutionary problem with serious clinical implications due to their role in the ongoing antibiotic resistance crisis. Recently, major advancements have been made toward resolving this “plasmid paradox” but mainly in a nonclinical context. Here, we propose an additional explanation for the maintenance of multidrug‐resistance plasmids in clinical Escherichia coli strains. After coevolving two multidrug‐resistance plasmids encoding resistance to last resort carbapenems with an extraintestinal pathogenic E. coli strain, we observed that chromosomal media adaptive mutations in the global regulatory systems CCR (carbon catabolite repression) and ArcAB (aerobic respiration control) pleiotropically improved the maintenance of both plasmids. Mechanistically, a net downregulation of plasmid gene expression reduced the fitness cost. Our results suggest that global chromosomal transcriptional rewiring during bacterial niche adaptation may facilitate plasmid maintenance.
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