Evidence map›Paper›PMID 35314293›Full record

ArticleInternational journal of radiation oncology, biology, physics2022

Ultrafast Tracking of Oxygen Dynamics During Proton FLASH.

Mirna El Khatib, Alexander L Van Slyke, Anastasia Velalopoulou, Michele M Kim, Khayrullo Shoniyozov, Srinivasa Rao Allu, Eric E Diffenderfer, Theresa M Busch, Rodney D Wiersma, Cameron J Koch and 1 more

Open access · greenAbstract read
In one paragraph

Article in International journal of radiation oncology, biology, physics, 2022. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 56 papers, 1 of them a synthesis that pooled it.

0numbers the graph read from it
0cells of the map it votes in
56citing papers in PubMed, 1 pooled it
9.7field-weighted citation impact, top 1% 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

56 citing papers in PubMed, 1 synthesis or guideline pooled it, 68 citations in OpenAlex.

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  14. Erythroid precursors regulate local oxygen tension and repair outcomes in the bone marrow niche.Proceedings of the National Academy of Sciences of the United States of America · 2025
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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

11 authors at 3 institutions in 2 countries.

Mirna El KhatibDepartment of Biochemistry and Biophysics, Perelman School of Medicine; Department of Chemistry, School of Arts and Sciences.
Alexander L Van SlykeDepartment of Radiation Oncology, Perelman School of Medicine, University of Pennsylvania, Philadelphia, Pennsylvania.
Anastasia VelalopoulouDepartment of Radiation Oncology, Perelman School of Medicine, University of Pennsylvania, Philadelphia, Pennsylvania.
Michele M KimDepartment of Radiation Oncology, Perelman School of Medicine, University of Pennsylvania, Philadelphia, Pennsylvania.
Khayrullo ShoniyozovDepartment of Radiation Oncology, Perelman School of Medicine, University of Pennsylvania, Philadelphia, Pennsylvania.
Srinivasa Rao AlluDepartment of Biochemistry and Biophysics, Perelman School of Medicine; Department of Chemistry, School of Arts and Sciences.
Eric E DiffenderferDepartment of Radiation Oncology, Perelman School of Medicine, University of Pennsylvania, Philadelphia, Pennsylvania.
Theresa M BuschDepartment of Radiation Oncology, Perelman School of Medicine, University of Pennsylvania, Philadelphia, Pennsylvania.
Rodney D WiersmaDepartment of Radiation Oncology, Perelman School of Medicine, University of Pennsylvania, Philadelphia, Pennsylvania.
Cameron J KochDepartment of Radiation Oncology, Perelman School of Medicine, University of Pennsylvania, Philadelphia, Pennsylvania.
Sergei A VinogradovDepartment of Biochemistry and Biophysics, Perelman School of Medicine; Department of Chemistry, School of Arts and Sciences. Electronic address: vinograd.upenn@gmail.com.
University of Pennsylvania · USInstitute of Biophysics · BGEngineering Arts (United States) · US

Funding

PREDICTING RADIATION RESPONSE BY TUMOR PO2 AND THIOLSR01CA074071 · NCI · UNIVERSITY OF PENNSYLVANIA · PI KOCH, CAMERON J · 1998 to 2006
$1.7M
Oxygen imaging by phosphorescence quenchingU24EB028941 · NIBIB · UNIVERSITY OF PENNSYLVANIA · PI VINOGRADOV, SERGEI · 2019 to 2023
$1.6M
Membrane Anchored-Probes for Sensing Analytes at the Cell SurfaceK25HL145092 · NHLBI · UNIVERSITY OF PENNSYLVANIA · PI EL KHATIB, MIRNA · 2019 to 2023
$745k
A molecular probe for high-resolution dual imaging of temperature and oxygen in vivoR21EB027397 · NIBIB · UNIVERSITY OF PENNSYLVANIA · PI VINOGRADOV, SERGEI · 2018 to 2019
$464k
NCI NIH HHS R01 CA074071NHLBI NIH HHS K25 HL145092NIBIB NIH HHS R21 EB027397NIBIB NIH HHS U24 EB028941
6 · The paper itself

Abstract

purposeRadiation therapy delivered at ultrafast dose rates, known as FLASH RT, has been shown to provide a therapeutic advantage compared with conventional radiation therapy by selectively protecting normal tissues. Radiochemical depletion of oxygen has been proposed to underpin the FLASH effect; however, experimental validation of this hypothesis has been lacking, in part owing to the inability to measure oxygenation at rates compatible with FLASH. METHODS AND MATERIALS: We present a new variant of the phosphorescence quenching method for tracking oxygen dynamics with rates reaching up to ∼3.3 kHz. Using soluble Oxyphor probes we were able to resolve, both in vitro and in vivo, oxygen dynamics during the time of delivery of proton FLASH.

resultsIn vitro in solutions containing bovine serum albumin the O

conclusionsThe developed method should be instrumental in radiobiological studies, such as studies aimed at unraveling the mechanism of the FLASH effect. The FLASH effect could in part originate from the difference in the oxygen dependencies of the oxygen consumption g values for conventional versus FLASH RT.

Indexed as

ProtonsProton TherapyHumansLungOxygenRadiobiologyRadiotherapy DosageOxygenProtons

Identifiers

PMID35314293
PMCPMC9250619
OpenAlexW4220728338

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.