Evidence map›Paper›PMID 21125123›Full record

ArticlePhotochemical & photobiological sciences : Official journal of the European Photochemistry Association and the European Society for Photobiology2011

Antimicrobial mechanisms behind photodynamic effect in the presence of hydrogen peroxide.

Aguinaldo Silva Garcez, Silvia Cristina Núñez, Mauricio S Baptista, Nasser Ali Daghastanli, Rosangela Itri, Michael R Hamblin, Martha Simões Ribeiro

Open access · bronzeAbstract read
In one paragraph

Article in Photochemical & photobiological sciences : Official journal of the European Photochemistry Association and the European Society for Photobiology, 2011. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 17 papers.

0numbers the graph read from it
0cells of the map it votes in
17citing papers in PubMed
2.4field-weighted citation impact, top 11% 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

17 citing papers in PubMed, 68 citations in OpenAlex.

  1. Article
  2. Photodynamic treatment ofRSC medicinal chemistry · 2024
    Article
  3. Article
  4. Article
  5. Article
  6. Review
  7. Contribution of SOS genes to HCurrent genetics · 2021
    Article
  8. Article
  9. Article
  10. Effective Photodynamic Inactivation of 26Antibiotics (Basel, Switzerland) · 2020
    Article
  11. Article
  12. Article
  13. Review
  14. Article
  15. Article
  16. Article
  17. 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

7 authors at 5 institutions in 2 countries.

Aguinaldo Silva GarcezCentro de Pesquisa e Pós-Graduação São Leopoldo Mandic, Campinas-SP, Brazil.
Silvia Cristina Núñez
Mauricio S Baptista
Nasser Ali Daghastanli
Rosangela Itri
Michael R Hamblin
Martha Simões Ribeiro
Universidade de São Paulo · BRFaculdade São Leopoldo Mandic · BRInstituto de Pesquisas Energéticas e Nucleares · BRMassachusetts General Hospital · USUniversidade Federal do ABC · BR

Funding

Photodynamic Therapy of Localized InfectionsR01AI050875 · NIAID · MASSACHUSETTS GENERAL HOSPITAL · PI HAMBLIN, MICHAEL R · 2003 to 2017
$4.8M
NIAID NIH HHS R01 AI050875NIAID NIH HHS R01AI050875
6 · The paper itself

Abstract

This study describes the use of methylene blue (MB) plus light (photodynamic inactivation, PDI) in the presence of hydrogen peroxide (H(2)O(2)) to kill Staphylococcus aureus, Escherichia coli, and Candida albicans. When H(2)O(2) was added to MB plus light there was an increased antimicrobial effect, which could be due to a change in the type of ROS generated or increased microbial uptake of MB. To clarify the mechanism, the production of ROS was investigated in the presence and absence of H(2)O(2). It was observed that ROS production was almost inhibited by the presence of H(2)O(2) when cells were not present. In addition, experiments using different sequence combinations of MB and H(2)O(2) were performed and MB optical properties inside the cell were analyzed. Spectroscopy experiments suggested that the amount of MB was higher inside the cells when H(2)O(2) was used before or simultaneously with PDI, and ROS formation inside C. albicans cells confirmed that ROS production is higher in the presence of H(2)O(2). Moreover enzymatic reduction of MB by E. coli during photosensitizer uptake to the photochemically inactive leucoMB could be reversed by the oxidative effects of hydrogen peroxide, increasing ROS formation inside the microorganism. Therefore, the combination of a photosensitizer such as MB and H(2)O(2) is an interesting approach to improve PDI efficiency.

Indexed as

Anti-Infective AgentsCandida albicansEscherichia coliHydrogen PeroxideLightMethylene BlueOxidation-ReductionPhotosensitizing AgentsReactive Oxygen SpeciesStaphylococcus aureusAnti-Infective AgentsHydrogen PeroxideMethylene BluePhotosensitizing AgentsReactive Oxygen Species

Identifiers

PMID21125123
PMCPMC3069140
OpenAlexW2090709616

What OpenQuestion holds

Textmetadata
LicenceTDM
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.