Evidence map›Paper›PMID 21261881›Full record

ReviewMicrobial biotechnology2009

Mechanism of action of and resistance to quinolones.

Anna Fàbrega, Sergi Madurga, Ernest Giralt, Jordi Vila

Open access · bronzeAbstract readReview
In one paragraph

Review in Microbial biotechnology, 2009. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 195 papers.

0numbers the graph read from it
0cells of the map it votes in
195citing papers in PubMed
1.5field-weighted citation impact, top 20% of its field
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

195 citing papers in PubMed, 471 citations in OpenAlex.

  1. Article
  2. Thermal Shifts Dominate Single-Gene Responses to Transcription-Targeting Antibiotics.Advanced science (Weinheim, Baden-Wurttemberg, Germany) · 2026
    Article
  3. Article
  4. Review
  5. Article
  6. Antibiotic resistance mechanisms and global resistance patterns of Pseudomonas aeruginosa in microbial keratitis.European journal of clinical microbiology & infectious diseases : official publication of the European Society of Clinical Microbiology · 2026
    Review
  7. Article
  8. Review
  9. Article
  10. Article
  11. Article
  12. Article
  13. Review
  14. Article
  15. Review
  16. Genetic Basis of Multiple Antibiotic Resistance of PathogenicInternational journal of molecular sciences · 2025
    Article
  17. Article
  18. Review
  19. Article
  20. Review

135 more citing papers are in PubMed but not listed here.

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

4 authors at 3 institutions in 3 countries.

Anna FàbregaDepartment of Microbiology, Hospital Clinic, School of Medicine, University of Barcelona, Barcelona, Spain.
Sergi Madurga
Ernest Giralt
Jordi Vila
Institute for Research in Biomedicine · ESHospital Clínic de Barcelona · ESUniversitat de Barcelona · ES

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

Fluoroquinolones are an important class of wide-spectrum antibacterial agents. The first quinolone described was nalidixic acid, which showed a narrow spectrum of activity. The evolution of quinolones to more potent molecules was based on changes at positions 1, 6, 7 and 8 of the chemical structure of nalidixic acid. Quinolones inhibit DNA gyrase and topoisomerase IV activities, two enzymes essential for bacteria viability. The acquisition of quinolone resistance is frequently related to (i) chromosomal mutations such as those in the genes encoding the A and B subunits of the protein targets (gyrA, gyrB, parC and parE), or mutations causing reduced drug accumulation, either by a decreased uptake or by an increased efflux, and (ii) quinolone resistance genes associated with plasmids have been also described, i.e. the qnr gene that encodes a pentapeptide, which blocks the action of quinolones on the DNA gyrase and topoisomerase IV; the aac(6')-Ib-cr gene that encodes an acetylase that modifies the amino group of the piperazin ring of the fluoroquinolones and efflux pump encoded by the qepA gene that decreases intracellular drug levels. These plasmid-mediated mechanisms of resistance confer low levels of resistance but provide a favourable background in which selection of additional chromosomally encoded quinolone resistance mechanisms can occur.

Indexed as

Drug Resistance, BacterialAnti-Bacterial AgentsBacteriaBacterial ProteinsGene Expression Regulation, BacterialProtein BindingQuinolonesAnti-Bacterial AgentsBacterial ProteinsQuinolones

Identifiers

PMID21261881
PMCPMC3815421
OpenAlexW2039556608

What OpenQuestion holds

Textmetadata
Read underepoch 390

Registered trials

None linked

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.