Evidence map›Paper›PMID 29740035›Full record

ArticleScientific reports2018

Antimicrobial photodynamic therapy mediated by methylene blue and potassium iodide to treat urinary tract infection in a female rat model.

Ying-Ying Huang, Anton Wintner, Patrick C Seed, Timothy Brauns, Jeffrey A Gelfand, Michael R Hamblin

Open access · goldAbstract 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 34 papers.

0numbers the graph read from it
0cells of the map it votes in
34citing papers in PubMed
8.8field-weighted citation impact, top 2% 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

34 citing papers in PubMed, 88 citations in OpenAlex.

  1. Establishment and optimization of anFrontiers in immunology · 2026
    Article
  2. New cationic diketopyrrolopyrrole photosensitizers for the photoinactivation of gram-negative and gram-positive bacteria.Photochemical & photobiological sciences : Official journal of the European Photochemistry Association and the European Society for Photobiology · 2025
    Article
  3. Article
  4. Article
  5. Potentiation of antimicrobial photodynamic therapy with potassium iodide and methylene blue: targeting oral biofilm viability.Photochemical & photobiological sciences : Official journal of the European Photochemistry Association and the European Society for Photobiology · 2024
    Article
  6. Article
  7. Photomodulation Approaches to Overcome Antimicrobial Resistance.Pharmaceuticals (Basel, Switzerland) · 2023
    Review
  8. Article
  9. Article
  10. Article
  11. Article
  12. Article
  13. Article
  14. Article
  15. Article
  16. Article
  17. Article
  18. 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 at 3 institutions in 1 country.

Ying-Ying HuangWellman Center for Photomedicine, Massachusetts General Hospital, Boston, MA, 02114, USA.
Anton WintnerDepartment of Urology, Massachusetts General Hospital, Boston, MA, 02114, USA.
Patrick C SeedDepartment of Pediatrics, Duke University Medical Center, Durham, NC, USA.
Timothy BraunsDepartment of Medicine, Massachusetts General Hospital, Boston, MA, 02114, USA.
Jeffrey A GelfandDepartment of Medicine, Massachusetts General Hospital, Boston, MA, 02114, USA. JGELFAND@mgh.harvard.edu.
Michael R HamblinWellman Center for Photomedicine, Massachusetts General Hospital, Boston, MA, 02114, USA. Hamblin@helix.mgh.harvard.edu.ORCID 0000-0001-6431-4605
Massachusetts General Hospital · USHarvard University · USDuke Medical Center · US

Funding

Photodynamic Therapy of Localized InfectionsR01AI050875 · NIAID · MASSACHUSETTS GENERAL HOSPITAL · PI HAMBLIN, MICHAEL R · 2003 to 2017
$4.8M
Synergistic Photodynamic Therapy for Catherer-Associated Urinary Tract InfectionsR21AI121700 · NIAID · MASSACHUSETTS GENERAL HOSPITAL · PI HAMBLIN, MICHAEL R · 2016 to 2017
$462k
NIAID NIH HHS R01 AI050875NIAID NIH HHS R21 AI121700
6 · The paper itself

Abstract

Drug-resistant urinary tract infections (UTIs) are difficult and sometimes impossible to treat. Many UTIs are caused by uropathogenic Escherichia coli (UPEC). We developed an intact rat model of UTI, by catheterizing female rats and introducing a bioluminescent UPEC strain into the female rat bladder which lasted for up to six days. We recently showed that antimicrobial photodynamic inactivation (aPDI) of a bacterial infection mediated by the well-known phenothiazinium salt, methylene blue (MB) could be strongly potentiated by addition of the non-toxic salt potassium iodide (KI). In the intact rat model we introduced MB into the bladder by catheter, followed by KI solution and delivered intravesicular illumination with a diffusing fiber connected to a 1 W 660 nm laser. Bioluminescent imaging of the bacterial burden was carried out during the procedure and for 6 days afterwards. Light-dose dependent loss of bioluminescence was observed with the combination of MB followed by KI, but recurrence of infection was seen the next day in some cases. aPDT with MB + KI gave a significantly shorter duration of infection compared to untreated controls. aPDT with MB alone was the least effective. No signs of aPDT damage to the bladder lining were detected. This procedure to treat urinary tract infections without antibiotics by using already approved pharmaceutical substances (MB and KI) may have clinical applicability, either initially as a stand-alone therapy, or as an adjunct to antibiotic therapy by a rapid and substantial reduction of the bacterial burden.

Indexed as

AnimalsAnti-Infective AgentsDisease Models, AnimalFemaleHumansMethylene BluePhotochemotherapyPhotosensitizing AgentsPotassium IodideRatsUrinary Tract InfectionsUropathogenic Escherichia coliAnti-Infective AgentsMethylene BluePhotosensitizing AgentsPotassium Iodide

Identifiers

PMID29740035
PMCPMC5940872
OpenAlexW2806322458

What OpenQuestion 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 OpenQuestion graph.