Cited by 141Antimicrobial agents and applicationsBuilding materials and conservationBacterial biofilms and quorum sensing

Weakening Effect of Cell Permeabilizers on Gram-Negative Bacteria Causing Biodeterioration

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Alakomi, H.-L., Paananen, A., Suihko, M.-L., Helander, I. M., Saarela, M.·2006·Applied and Environmental Microbiology

Abstract

Gram-negative bacteria play an important role in the formation and stabilization of biofilm structures on stone surfaces. Therefore, the control of growth of gram-negative bacteria offers a way to diminish biodeterioration of stone materials. The effect of potential permeabilizers on the outer membrane (OM) properties of gram-negative bacteria was investigated and further characterized. In addition, efficacy of the agents in enhancing the activity of a biocide (benzalkonium chloride) was assessed. EDTA, polyethylenimine (PEI), and succimer (meso-2,3-dimercaptosuccinic) were shown to be efficient permeabilizers of the members of Pseudomonas and Stenotrophomonas genera, as indicated by an increase in the uptake of a hydrophobic probe (1-N-phenylnaphthylamine) and sensitization to hydrophobic antibiotics. Visualization of Pseudomonas cells treated with EDTA or PEI by atomic force microscopy revealed damage in the outer membrane structure. PEI especially increased the surface area and bulges of the cells. Topographic images of EDTA-treated cells were compatible with events assigned for the effect of EDTA on outer membranes, i.e., release of lipopolysaccharide and disintegration of OM structure. In addition, the effect of EDTA treatment was visualized in phase-contrast images as large areas with varying hydrophilicity on cell surfaces. In liquid culture tests, EDTA and PEI supplementation enhanced the activity of benzalkonium chloride toward the target strains. Use of permeabilizers in biocide formulations would enable the use of decreased concentrations of the active biocide ingredient, thereby providing environmentally friendlier products.

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Crossref · 10.1128/aem.00142-06

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  • Structural changes in the membrane, such as fluidity alteration, could lead to a slight modification in the external surface of the Gram-positive cell wall such that they appear less rough but more bumpy than Gram-negative bacteria.

    “The structural changes in the membrane, such as fluidity alteration, could lead to a slight modification in the external surface of the Gram-positive cell wall such that they appears less rough but more bumpy than Gram-negative bacteria [120].”

    From Effect of essential oils on pathogenic bacteria (2013) · cites this paper as [120]

  • In Gram-positive bacteria, carvacrol moves through the peptidoglycan layer and then acts on the cytoplasmic membrane.

    “However, in Gram-positive bacteria, carvacrol moves through the peptidoglycan layer and then acts on the cytoplasmic membrane.”

    From Effect of essential oils on pathogenic bacteria (2013) · cites this paper as [120]

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Authors
Alakomi, H.-L., Paananen, A., Suihko, M.-L., Helander, I. M., & Saarela, M.
Affiliations
  • VTT Technical Research Centre of Finland (FI)
  • University of Helsinki (FI)
Corresponding author
Alakomi, H.-L.
Venue
Applied and Environmental Microbiology
Published
2006-07
Volume
72
Issue
7
Pages
4695-4703
ISSN
  • 0099-2240 (ISSN-L)
  • 1098-5336
OpenAlex
W2171028011
Cited by
141
References
46
Citations by year
2026: 4 · 2025: 9 · 2024: 6 · 2023: 5 · 2022: 6 · 2021: 14 · 2020: 14 · 2019: 11 · 2018: 8 · 2017: 7 · 2016: 9 · 2015: 9 · 2014: 4 · 2013: 8 · 2012: 10
FWCI
1.80
Type
journal article
Language
en
Open access
Locations
  • Applied and Environmental Microbiology (publishedVersion)
  • Europe PMC (PubMed Central) (publishedVersion)
  • PubMed (publishedVersion)
Topics
  • Physical Sciences › Chemistry › Organic Chemistry › Antimicrobial agents and applications
  • Physical Sciences › Earth and Planetary Sciences › Earth-Surface Processes › Building materials and conservation
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Bacterial biofilms and quorum sensing
Keywords
Gram-negative bacteria, stone biodeterioration, outer membrane disruption, EDTA, polyethyleneimine, succimer, benzalkonium chloride, Pseudomonas, Stenotrophomonas, lipopolysaccharide release, hydrophobic antibiotics
MeSH terms
Anti-Bacterial Agents, Calcium Carbonate, Cell Membrane, Cell Membrane Permeability, Edetic Acid, Gram-Negative Bacteria, Microbial Sensitivity Tests, Molecular Sequence Data, Polyethyleneimine, Pseudomonas, Silicon Dioxide, Sequence Analysis, DNA, Microscopy, Atomic Force, Sinorhizobium, Stenotrophomonas

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