Evidence map›Paper›PMID 38285244›Full record

Trial reportJournal of neuro-oncology2024

Iron-based biomarkers for personalizing pharmacological ascorbate therapy in glioblastoma: insights from a phase 2 clinical trial.

M S Petronek, K L Bodeker, C Y Lee, N Teferi, K L Eschbacher, K A Jones, B T Loeffler, B J Smith, J M Buatti, V A Magnotta and 1 more

Registry-linked trialAbstract readClinical Trial, Phase II
In one paragraph

Trial report in Journal of neuro-oncology, 2024. The graph could read no effect estimate from its abstract, so it casts no vote on the map. It is linked to trial NCT02344355 (Pharmacological Ascorbate Combined With Radiation and Temozolomide in Glioblastoma Multiforme), which is not on this map. Cited by 7 papers, 1 of them a synthesis that pooled it.

0numbers the graph read from it
0cells of the map it votes in
7citing papers in PubMed, 1 pooled it
3.2field-weighted citation impact, top 9% 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.

NCT02344355 phase2active not recruitingnot on this map

Pharmacological Ascorbate Combined With Radiation and Temozolomide in Glioblastoma Multiforme: A Phase 2 Trial

TypeinterventionalSponsorBryan AllenRan2017 to 2028Enrolled90ConditionsGlioblastoma MultiformeArmsTemozolomide, radiation therapy, Ascorbic Acid
3 · Its place in the literature

Who cites it

7 citing papers in PubMed, 1 synthesis or guideline pooled it, 7 citations in OpenAlex.

  1. Pooled it
  2. Article
  3. Review
  4. Review
  5. Clinical MR Biomarkers.Recent results in cancer research. Fortschritte der Krebsforschung. Progres dans les recherches sur le cancer · 2026
    Review
  6. Iron Mediates Radiation-Induced Glioblastoma Cell Diffusion.International journal of molecular sciences · 2025
    Article
  7. 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

11 authors at 2 institutions in 1 country.

M S PetronekDepartment of Radiation Oncology, Division of Free Radical and Radiation Biology, University of Iowa, Iowa City, IA, USA. michael-petronek@uiowa.edu.
K L BodekerDepartment of Radiation Oncology, Division of Free Radical and Radiation Biology, University of Iowa, Iowa City, IA, USA.
C Y LeeDepartment of Radiology, University of Iowa, Iowa City, IA, USA.
N TeferiDepartment of Radiation Oncology, Division of Free Radical and Radiation Biology, University of Iowa, Iowa City, IA, USA.
K L EschbacherDepartment of Pathology, University of Iowa, Iowa City, IA, USA.
K A JonesDepartment of Pathology, Division of Neuropathology, Duke University, Durham, NC, USA.
B T LoefflerHolden Comprehensive Cancer Center, University of Iowa, Iowa City, IA, USA.
B J SmithDepartment of Biostatistics, University of Iowa, Iowa City, IA, USA.
J M BuattiDepartment of Radiation Oncology, Division of Free Radical and Radiation Biology, University of Iowa, Iowa City, IA, USA.
V A MagnottaDepartment of Radiology, University of Iowa, Iowa City, IA, USA.
B G AllenDepartment of Radiation Oncology, Division of Free Radical and Radiation Biology, University of Iowa, Iowa City, IA, USA.
University of Iowa · USDuke University · US

Funding

Project 3: MRI Imaging of Redox Active Fe Predicts GBM Responses to Pharmacological AscorbateP01CA217797 · NCI · UNIVERSITY OF IOWA · PI BUATTI, JOHN M · 2018 to 2022
$9.6M
Redox manipulation of iron to improve glioblastoma therapy: A phase 1 trialR21CA270742 · NCI · UNIVERSITY OF IOWA · PI ALLEN, BRYAN, BUATTI, JOHN M · 2023 to 2024
$391k
NCI NIH HHS P01 CA217797NCI NIH HHS R21 CA270742NIH HHS P01 CA217797
6 · The paper itself

Abstract

backgroundPharmacological ascorbate (intravenous delivery reaching plasma concentrations ≈ 20 mM; P-AscH

methodsParticipants (n = 55) with newly diagnosed glioblastoma were enrolled in a phase 2 clinical trial conducted at the University of Iowa (NCT02344355). Tumor samples obtained during surgical resection were processed and stained for transferrin receptor and ferritin heavy chain expression. A blinded pathologist performed pathological assessment. Quantitative susceptibility mapping (QSM) measures were obtained from pre-radiotherapy MRI scans following maximal safe surgical resection. Circulating blood iron panels were evaluated prior to therapy through the University of Iowa Diagnostic Laboratory.

resultsThrough univariate analysis, a significant inverse association was observed between tumor transferrin receptor expression and overall and progression-free survival. QSM measures exhibited a significant, positive association with progression-free survival. Subjects were actively followed until disease progression and then were followed through chart review or clinical visits for overall survival.

conclusionsThis study analyzes iron-related biomarkers in the context of P-AscH

Indexed as

Antineoplastic AgentsBrain NeoplasmsGlioblastomaBiomarkersHumansIronReceptors, TransferrinTemozolomideAntineoplastic AgentsBiomarkersIronReceptors, TransferrinTemozolomideGlioblastomaIron metabolismPharmacological ascorbateQuantitative susceptibility mappingTransferrin receptor

Identifiers

PMID38285244
PMCPMC13105400
OpenAlexW4391312894

What Socratic holds

Textmetadata
LicenceTDM
Read underepoch 390

Registered trials

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 Socratic graph.