Evidence map›Paper›PMID 34959460›Full record

ArticlePharmaceutics2021

Unveiling the Membrane and Cell Wall Action of Antimicrobial Cyclic Lipopeptides: Modulation of the Spectrum of Activity.

Roser Segovia, Judith Solé, Ana Maria Marqués, Yolanda Cajal, Francesc Rabanal

Open access · goldAbstract read
In one paragraph

Article in Pharmaceutics, 2021. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 11 papers.

0numbers the graph read from it
0cells of the map it votes in
11citing papers in PubMed
2.0field-weighted citation impact, top 14% 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

11 citing papers in PubMed, 20 citations in OpenAlex.

  1. Review
  2. Unlocking olive rhizobacteria: harnessing biocontrol power to combat olive root rot and promote plant growth.International microbiology : the official journal of the Spanish Society for Microbiology · 2025
    Article
  3. Review
  4. Antifungal potential ofFrontiers in microbiology · 2025
    Article
  5. Article
  6. Article
  7. Article
  8. Antimicrobial Activity ofVeterinary sciences · 2023
    Article
  9. Article
  10. Optimization of the Hemolysis Assay for the Assessment of Cytotoxicity.International journal of molecular sciences · 2023
    Article
  11. 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

5 authors at 2 institutions in 1 country.

Roser SegoviaSection of Organic Chemistry, Department of Inorganic and Organic Chemistry, Faculty of Chemistry, University of Barcelona, 08028 Barcelona, Spain.
Judith SoléSection of Organic Chemistry, Department of Inorganic and Organic Chemistry, Faculty of Chemistry, University of Barcelona, 08028 Barcelona, Spain.
Ana Maria MarquésLaboratory of Microbiology, Faculty of Pharmacy and Food Sciences, University of Barcelona, 08007 Barcelona, Spain.ORCID 0000-0002-4914-0472
Yolanda CajalDepartment of Pharmacy, Pharmaceutical Technology and Physical Chemistry, Faculty of Pharmacy and Food Sciences, University of Barcelona, 08028 Barcelona, Spain.ORCID 0000-0003-1603-8313
Francesc RabanalSection of Organic Chemistry, Department of Inorganic and Organic Chemistry, Faculty of Chemistry, University of Barcelona, 08028 Barcelona, Spain.ORCID 0000-0002-4913-155X
Universitat de Barcelona · ESInstitut de Nanociència i Nanotecnologia de la Universitat de Barcelona

Funding

Fundació Marató TV3 201829-10Ministry of Economy and Competitiveness RTI2018-098641-B-I00
6 · The paper itself

Abstract

Antibiotic resistance is a major public health challenge, and Gram-negative multidrug-resistant bacteria are particularly dangerous. The threat of running out of active molecules is accelerated by the extensive use of antibiotics in the context of the COVID-19 pandemic, and new antibiotics are urgently needed. Colistin and polymyxin B are natural antibiotics considered as last resort drugs for multi-resistant infections, but their use is limited because of neuro- and nephrotoxicity. We previously reported a series of synthetic analogues inspired in natural polymyxins with a flexible scaffold that allows multiple modifications to improve activity and reduce toxicity. In this work, we focus on modifications in the hydrophobic domains, describing analogues that broaden or narrow the spectrum of activity including both Gram-positive and Gram-negative bacteria, with MICs in the low µM range and low hemolytic activity. Using biophysical methods, we explore the interaction of the new molecules with model membranes that mimic the bacterial inner and outer membranes, finding a selective effect on anionic membranes and a mechanism of action based on the alteration of membrane function. Transmission electron microscopy observation confirms that polymyxin analogues kill microbial cells primarily by damaging membrane integrity. Redistribution of the hydrophobicity within the polymyxin molecule seems a plausible approach for the design and development of safer and more selective antibiotics.

Indexed as

antibacterial resistanceantimicrobial peptidecolistinmodel membranespolymyxin

Identifiers

PMID34959460
PMCPMC8708274
OpenAlexW4200518619

What Socratic holds

Textmetadata
LicenceCC BY
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 Socratic graph.