Evidence map›Paper›PMID 28393017›Full record

ArticlePhotoacoustics2017

Photoacoustic signal characterization of cancer treatment response: Correlation with changes in tumor oxygenation.

Eno Hysi, Lauren A Wirtzfeld, Jonathan P May, Elijus Undzys, Shyh-Dar Li, Michael C Kolios

Abstract read
In one paragraph

Article in Photoacoustics, 2017. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 24 papers.

0numbers the graph read from it
0cells of the map it votes in
24citing 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

24 citing papers in PubMed.

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  14. A Robust Oxygen Microbubble Radiosensitizer for Iodine-125 Brachytherapy.Advanced science (Weinheim, Baden-Wurttemberg, Germany) · 2021
    Article
  15. Photoacoustic Computed Tomography of Breast Cancer in Response to Neoadjuvant Chemotherapy.Advanced science (Weinheim, Baden-Wurttemberg, Germany) · 2021
    Article
  16. Article
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  19. Review
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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

6 authors.

Eno HysiDepartment of Physics, Ryerson University, Toronto, M5 B 2K3, Canada; Institute for Biomedical Engineering, Science and Technology, Li Ka Shing Knowledge Institute, Keenan Research Center, St. Michael's Hospital, Toronto, M5 B 1T8, Canada.
Lauren A WirtzfeldDepartment of Physics, Ryerson University, Toronto, M5 B 2K3, Canada; Institute for Biomedical Engineering, Science and Technology, Li Ka Shing Knowledge Institute, Keenan Research Center, St. Michael's Hospital, Toronto, M5 B 1T8, Canada.
Jonathan P MayFaculty of Pharmaceutical Sciences, The University of British Colombia, Vancouver, V6T 1Z3, Canada.
Elijus UndzysDrug Delivery and Formulation Group, Ontario Institute for Cancer Research, Toronto, M5G 0A3, Canada.
Shyh-Dar LiFaculty of Pharmaceutical Sciences, The University of British Colombia, Vancouver, V6T 1Z3, Canada.
Michael C KoliosDepartment of Physics, Ryerson University, Toronto, M5 B 2K3, Canada; Institute for Biomedical Engineering, Science and Technology, Li Ka Shing Knowledge Institute, Keenan Research Center, St. Michael's Hospital, Toronto, M5 B 1T8, Canada.

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

Frequency analysis of the photoacoustic radiofrequency signals and oxygen saturation estimates were used to monitor the in-vivo response of a novel, thermosensitive liposome treatment. The liposome encapsulated doxorubicin (HaT-DOX) releasing it rapidly (<20 s) when the tumor was exposed to mild hyperthermia (43 °C). Photoacoustic imaging (VevoLAZR, 750/850 nm, 40 MHz) of EMT-6 breast cancer tumors was performed 30 min pre- and post-treatment and up to 7 days post-treatment (at 2/5/24 h timepoints). HaT-DOX-treatment responders exhibited on average a 22% drop in oxygen saturation 2 h post-treatment and a decrease (45% at 750 nm and 73% at 850 nm) in the slope of the normalized PA frequency spectra. The spectral slope parameter correlated with treatment-induced hemorrhaging which increased the optical absorber effective size via interstitial red blood cell leakage. Combining frequency analysis and oxygen saturation estimates differentiated treatment responders from non-responders/control animals by probing the treatment-induced structural changes of blood vessel.

Indexed as

Cancer treatment monitoringOxygen saturationPhotoacoustic and ultrasound tissue characterizationRadiofrequency analysisTumor blood vessels

Identifiers

PMID28393017
PMCPMC5377014

What OpenQuestion holds

Textmetadata
LicenceCC BY-NC-ND
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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.