Evidence map›Paper›PMID 30042350›Full record

ArticleMolecules (Basel, Switzerland)2018

Measurement of Cyanine Dye Photobleaching in Photosensitizer Cyanine Dye Conjugates Could Help in Optimizing Light Dosimetry for Improved Photodynamic Therapy of Cancer.

Nadine S James, Ravindra R Cheruku, Joseph R Missert, Ulas Sunar, Ravindra K Pandey

Abstract read
In one paragraph

Article in Molecules (Basel, Switzerland), 2018. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 21 papers.

0numbers the graph read from it
0cells of the map it votes in
21citing papers in PubMed
–field-weighted citation impact
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

21 citing papers in PubMed.

  1. Review
  2. Unveiling the Excited-State Dynamics and Interfacial Interactions in Dye-Sensitized NaNdFAdvanced science (Weinheim, Baden-Wurttemberg, Germany) · 2025
    Article
  3. Article
  4. Article
  5. The ATTO 565 Dye and Its Applications in Microscopy.Molecules (Basel, Switzerland) · 2024
    Review
  6. Free base porphyrin-cyanine dye conjugate: synthesis and optical properties.Photochemical & photobiological sciences : Official journal of the European Photochemistry Association and the European Society for Photobiology · 2024
    Article
  7. Review
  8. Article
  9. Review
  10. Article
  11. Article
  12. Article
  13. Review
  14. Article
  15. Review
  16. Article
  17. Article
  18. Introduction to "Advances in Photodynamic Therapy 2018".Molecules (Basel, Switzerland) · 2019
    Article
  19. Review
  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

5 authors.

Nadine S JamesPDT Center, Cell Stress Biology, Roswell Park Cancer Institute, Buffalo, NY 14263, USA. nadine.james@roswellpark.org.
Ravindra R CherukuPDT Center, Cell Stress Biology, Roswell Park Cancer Institute, Buffalo, NY 14263, USA. ravindra.cheruku@roswellpark.org.
Joseph R MissertPDT Center, Cell Stress Biology, Roswell Park Cancer Institute, Buffalo, NY 14263, USA. joseph.missert@roswellpark.org.
Ulas SunarPDT Center, Cell Stress Biology, Roswell Park Cancer Institute, Buffalo, NY 14263, USA. ulas.sunar@roswellpark.org.
Ravindra K PandeyPDT Center, Cell Stress Biology, Roswell Park Cancer Institute, Buffalo, NY 14263, USA. ravindra.pandey@roswellpark.org.

Funding

Multifunctional Photosensitizers for Image-guided PDT of Brain TumorsR01CA127369 · NCI · ROSWELL PARK CANCER INSTITUTE CORP · PI PANDEY, RAVINDRA K. · 2008 to 2012
$3.0M
NCI NIH HHS R01 CA127369
6 · The paper itself

Abstract

Photodynamic therapy (PDT) of cancer is dependent on three primary components: photosensitizer (PS), light and oxygen. Because these components are interdependent and vary during the dynamic process of PDT, assessing PDT efficacy may not be trivial. Therefore, it has become necessary to develop pre-treatment planning, on-line monitoring and dosimetry strategies during PDT, which become more critical for two or more chromophore systems, for example, PS-CD (Photosensitizer-Cyanine dye) conjugates developed in our laboratory for fluorescence-imaging and PDT of cancer. In this study, we observed a significant impact of variable light dosimetry; (i) high light fluence and fluence rate (light dose: 135 J/cm², fluence rate: 75 mW/cm²) and (ii) low light fluence and fluence rate (128 J/cm² and 14 mW/cm² and 128 J/cm² and 7 mW/cm²) in photobleaching of the individual chromophores of PS-CD conjugates and their long-term tumor response. The fluorescence at the near-infrared (NIR) region of the PS-NIR fluorophore conjugate was assessed intermittently via fluorescence imaging. The loss of fluorescence, photobleaching, caused by singlet oxygen from the PS was mapped continuously during PDT. The tumor responses (BALB/c mice bearing Colon26 tumors) were assessed after PDT by measuring tumor sizes daily. Our results showed distinctive photobleaching kinetics rates between the PS and CD. Interestingly, compared to higher light fluence, the tumors exposed at low light fluence showed reduced photobleaching and enhanced long-term PDT efficacy. The presence of NIR fluorophore in PS-CD conjugates provides an opportunity of fluorescence imaging and monitoring the photobleaching rate of the CD moiety for large and deeply seated tumors and assessing PDT tumor response in real-time.

Indexed as

AnimalsCarbocyaninesChlorophyllColonic NeoplasmsDose-Response Relationship, RadiationFluorescent DyesGlycoconjugatesIndolesInfrared RaysMiceMice, Inbred BALB COptical ImagingPhotobleachingPhotochemotherapyPhotosensitizing AgentsPropionates2-(1-hexyloxyethyl)-2-devinyl pyropheophorbide-aCarbocyaninesChlorophyllCypateFluorescent DyesGlycoconjugatesIndolesPhotosensitizing AgentsPropionatesSinglet Oxygenfluorescence imagingphotobleachingPhotodynamic therapyphotosensitizers

Identifiers

PMID30042350
PMCPMC6222364

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Registered trials

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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.