Evidence map›Paper›PMID 30337550›Full record

ArticleScientific reports2018

Genomics of experimental adaptation of Staphylococcus aureus to a natural combination of insect antimicrobial peptides.

Olga Makarova, Paul Johnston, Alexandro Rodriguez-Rojas, Baydaa El Shazely, Javier Moreno Morales, Jens Rolff

Abstract read
In one paragraph

Article in Scientific reports, 2018. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 21 papers.

0numbers the graph read from it
0cells of the map it votes in
21citing papers in PubMed
–field-weighted citation impact
1 · What the graph read from it

What it found

Each row is one number read from the abstract, on the scale the paper reported it, with its interval. Left of the dashed line favours the treatment, right favours the comparator. Under each row is the sentence it came from. New to these charts? A ten-minute tutorial.

The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.

2 · The registry

The trial behind it

Trials whose registry record cites this paper, or whose number appears in the abstract. A trial that started after this paper was published is citing it as background, not reporting it.

Neither the registry nor the abstract names a trial number. If this is a trial report, that itself is worth knowing.

3 · Its place in the literature

Who cites it

21 citing papers in PubMed.

  1. Review
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  5. Article
  6. Article
  7. Review
  8. Article
  9. Article
  10. Article
  11. Alternate Antimicrobial Therapies and Their Companion Tests.Diagnostics (Basel, Switzerland) · 2023
    Review
  12. Article
  13. Review
  14. Review
  15. Article
  16. Review
  17. The Synergistic Effect of Mud Crab Antimicrobial Peptides Sphistin and SphFrontiers in cellular and infection microbiology · 2020
    Article
  18. Antimicrobial Peptide Induced-Stress RendersFrontiers in immunology · 2020
    Article
  19. Article
  20. Article
4 · The record

Corrections and comments

PubMed lists nothing against this paper. Absence here is not a guarantee, only a check that was made.

5 · Who and what money

Authors and funding

6 authors.

Olga MakarovaEvolutionary Biology, Institut für Biologie, Freie Universität Berlin, Berlin, Germany.
Paul JohnstonEvolutionary Biology, Institut für Biologie, Freie Universität Berlin, Berlin, Germany.ORCID http://orcid.org/0000-0002-8651-4488
Alexandro Rodriguez-RojasEvolutionary Biology, Institut für Biologie, Freie Universität Berlin, Berlin, Germany.
Baydaa El ShazelyEvolutionary Biology, Institut für Biologie, Freie Universität Berlin, Berlin, Germany.
Javier Moreno MoralesEvolutionary Biology, Institut für Biologie, Freie Universität Berlin, Berlin, Germany.ORCID http://orcid.org/0000-0002-5251-8579
Jens RolffEvolutionary Biology, Institut für Biologie, Freie Universität Berlin, Berlin, Germany. jens.rolff@fu-berlin.de.ORCID http://orcid.org/0000-0002-1529-5409

Funding

European Research Council 260986
6 · The paper itself

Abstract

Antimicrobial peptides (AMP) are highly conserved immune effectors across the tree of life and are employed as combinations. In the beetle Tenebrio molitor, a defensin and a coleoptericin are highly expressed in vivo after inoculation with S. aureus. The defensin displays strong in vitro activity but no survival benefit in vivo. The coleoptericin provides a survival benefit in vivo, but no activity in vitro. This suggests a potentiating effect in vivo, and here we wanted to investigate the effects of this combination on resistance evolution using a bottom-approach in vitro starting with a combination of two abundant AMPs only. We experimentally evolved S. aureus in the presence of the defensin and a combination of the defensin and coleoptericin. Genome re-sequencing showed that resistance was associated with mutations in either the pmt or nsa operons. Strains with these mutations show longer lag phases, slower Vmax, and nsa mutants reach lower final population sizes. Mutations in the rpo operon showed a further increase in the lag phase in nsa mutants but not in pmt mutants. In contrast, final MICs (minimum inhibitory concentrations) do not differ according to mutation. All resistant lines display AMP but not antibiotic cross-resistance. Costly resistance against AMPs readily evolves for an individual AMP as well as a naturally occurring combination in vitro and provides broad protection against AMPs. Such non-specific resistance could result in strong selection on host immune systems that rely on cocktails of AMPs.

Indexed as

AcclimatizationAnimalsAnti-Bacterial AgentsAntimicrobial Cationic PeptidesBacterial ProteinsDefensinsDrug Resistance, Multiple, BacterialGenomicsInsect ProteinsMicrobial Sensitivity TestsStaphylococcal InfectionsStaphylococcus aureusTenebrioAnti-Bacterial AgentsAntimicrobial Cationic PeptidesBacterial Proteinscoleoptericin protein, insectDefensinsInsect Proteins

Identifiers

PMID30337550
PMCPMC6193990

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Registered trials

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Read under generation 80e0d062 · epoch 390. Bibliography from PubMed, PubMed Central and OpenAlex; grants from NIH RePORTER; trial links from ClinicalTrials.gov; estimates, votes and beliefs from the OpenQuestion graph.