Evidence map›Paper›PMID 24938638›Full record

ArticleScientific reports2014

Multifunctional photosensitizer-based contrast agents for photoacoustic imaging.

Chris Jun Hui Ho, Ghayathri Balasundaram, Wouter Driessen, Ross McLaren, Chi Lok Wong, U S Dinish, Amalina Binte Ebrahim Attia, Vasilis Ntziachristos, Malini Olivo

Open access · goldAbstract read
In one paragraph

Article in Scientific reports, 2014. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 45 papers.

0numbers the graph read from it
0cells of the map it votes in
45citing papers in PubMed
9.2field-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

45 citing papers in PubMed, 116 citations in OpenAlex.

  1. Journal of biomedical optics · 2026
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  8. Recent advances in aggregation-induced emission luminogens in photoacoustic imaging.European journal of nuclear medicine and molecular imaging · 2022
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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

9 authors at 4 institutions in 3 countries.

Chris Jun Hui HoSingapore Bioimaging Consortium, Agency for Science, Technology and Research, Singapore.
Ghayathri BalasundaramSingapore Bioimaging Consortium, Agency for Science, Technology and Research, Singapore.
Wouter Driessen1] Institute for Biological and Medical Imaging, Helmholtz Center Munich, Germany [2] iThera Medical, GmbH, Germany.
Ross McLarenSingapore Bioimaging Consortium, Agency for Science, Technology and Research, Singapore.
Chi Lok WongSingapore Bioimaging Consortium, Agency for Science, Technology and Research, Singapore.
U S DinishSingapore Bioimaging Consortium, Agency for Science, Technology and Research, Singapore.
Amalina Binte Ebrahim AttiaSingapore Bioimaging Consortium, Agency for Science, Technology and Research, Singapore.
Vasilis Ntziachristos1] Institute for Biological and Medical Imaging, Helmholtz Center Munich, Germany [2] Technical University of Munich, Germany.
Malini Olivo1] Singapore Bioimaging Consortium, Agency for Science, Technology and Research, Singapore [2] School of Physics, National University of Ireland, Galway, Ireland.
Agency for Science, Technology and Research · SGHelmholtz Zentrum München · DESingapore Bioimaging Consortium · SGOllscoil na Gaillimhe – University of Galway · IE

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

Photoacoustic imaging is a novel hybrid imaging modality combining the high spatial resolution of optical imaging with the high penetration depth of ultrasound imaging. Here, for the first time, we evaluate the efficacy of various photosensitizers that are widely used as photodynamic therapeutic (PDT) agents as photoacoustic contrast agents. Photoacoustic imaging of photosensitizers exhibits advantages over fluorescence imaging, which is prone to photobleaching and autofluorescence interference. In this work, we examined the photoacoustic activity of 5 photosensitizers: zinc phthalocyanine, protoporphyrin IX, 2,4-bis [4-(N,N-dibenzylamino)-2,6-dihydroxyphenyl] squaraine, chlorin e6 and methylene blue in phantoms, among which zinc phthalocyanine showed the highest photoacoustic activity. Subsequently, we evaluated its tumor localization efficiency and biodistribution at multiple time points in a murine model using photoacoustic imaging. We observed that the probe localized at the tumor within 10 minutes post injection, reaching peak accumulation around 1 hour and was cleared within 24 hours, thus, demonstrating the potential of photosensitizers as photoacoustic imaging contrast agents in vivo. This means that the known advantages of photosensitizers such as preferential tumor uptake and PDT efficacy can be combined with photoacoustic imaging capabilities to achieve longitudinal monitoring of cancer progression and therapy in vivo.

Indexed as

Cell Line, TumorChlorophyllidesContrast MediaCyclobutanesDiagnostic ImagingHumansIndolesIsoindolesMCF-7 CellsMethylene BlueNeoplasmsOrganometallic CompoundsPhenolsPhotoacoustic TechniquesPhotochemotherapyPhotosensitizing AgentsChlorophyllidesContrast MediaCyclobutanesIndolesIsoindolesMethylene BlueOrganometallic CompoundsPhenolsPhotosensitizing AgentsphytochlorinPorphyrinsprotoporphyrin IXProtoporphyrinssquaraineZinc CompoundsZn(II)-phthalocyanine

Identifiers

PMID24938638
PMCPMC4061552
OpenAlexW2019557036

What OpenQuestion holds

Textmetadata
LicenceCC BY-NC-ND
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.