ArticleACS nano2025
2-Nitroimidazole-Functionalized Superparamagnetic Iron Oxide Nanoparticles Detect Hypoxic Regions of Glioblastomas on MRI and Improve Radiotherapy Efficacy.
Article in ACS nano, 2025. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 5 papers.
What it found
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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.
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Who cites it
5 citing papers in PubMed.
- Hypoxia-Targeting Strategies in Radiotherapy and Nitroimidazole-Based Radiosensitizers: A Narrative Review and Translational Perspectives.Current issues in molecular biology · 2026Review
- Nanomaterials reshaping cancer radiotherapy: Radiosensitization mechanisms, delivery and theranostic platforms, multimodal synergy, and clinical translation strategies.Materials today. Bio · 2026Review
- Multifunctional Hybrid Nanomedicines for Neurodegenerative Diseases: A Paradigm Shift from Rational Design to Clinical Translation.International journal of nanomedicine · 2026Review
- Engineered iron oxide nanoplatforms: reprogramming immunosuppressive niches for precision cancer theranostics.Molecular cancer · 2025Review
- Strategies for Pancreatic Cancer-Responsive Nanodrug Platforms Targeting Tumor Hypoxic Environments.International journal of nanomedicine · 2025Review
Corrections and comments
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Authors and funding
13 authors.
Funding
No grant is acknowledged in the PubMed record.
Abstract
The presence of hypoxic regions in tumors is associated with malignancy and is an important target for the high-precision diagnosis and treatment of tumors. Radioresistant hypoxic regions can be precisely identified and treated without the use of high doses of radiation if hypoxic region-specific contrast agents have a therapeutic effect. In this study, we synthesized a therapeutic-diagnostic complex agent (SPION-PG-NI) by combining polyglycerol-functionalized superparamagnetic iron oxide nanoparticles (SPION-PG, core diameter of 8.8 ± 1.9 nm) as an MRI contrast agent and 2-nitroimidazole (NI, a pimonidazole derivative) as a hypoxia-targeted ligand to visually evaluate hypoxic regions using MRI and improve radiotherapy efficacy at those sites. SPION-PG-NI showed a concentration-dependent contrast effect and had significantly higher accumulation in subcutaneous glioblastomas than the control agent, SPION-PG, 24 h after administration. Immunohistological evaluations showed that the SPION-PG-NI-accumulated regions corresponded well to hypoxic regions. SPION-PG-NI showed neither migration into the brain parenchyma nor neurotoxicity. Both SPION-PG and SPION-PG-NI decrease reactive oxygen species (ROS); however, they improve radiotherapy efficacy in hypoxic glioblastoma cells due to cytotoxicity. This effect of SPION-PG-NI was significantly higher than that of SPION-PG (
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