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Boron neutron capture therapy (BNCT) is a promising binary modality used to treat malignant brain gliomas. To optimize BNCT effectiveness a non-invasive method is needed to monitor the spatial distribution of BNCT carriers in order to estimate the optimal timing for neutron irradiation. In this study, in vivo spatial distribution mapping and pharmacokinetics evaluation of the (19)F-labelled boronophenylalanine (BPA) were performed using (19)F magnetic resonance imaging ((19)F MRI) and (19)F magnetic resonance spectroscopy ((19)F MRS). Characteristic uptake of (19)F-BPA in C6 glioma showed a maximum at 2.5 h after compound infusion as confirmed by both (19)F images and (19)F spectra acquired on blood samples collected at different times after infusion. This study shows the ability of (19)F MRI to selectively map the bio-distribution of (19)F-BPA in a C6 rat glioma model, as well as providing a useful method to perform pharmacokinetics of BNCT carriers.
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http://dx.doi.org/10.1088/0031-9155/53/23/021 | DOI Listing |
Dalton Trans
September 2025
Univ. Brest, UMR CNRS 6521 CEMCA, 6 Avenue Victor Le Gorgeu, 29200 Brest, France.
For the first time, trifluoroborate groups (BF) have been investigated as sensitive probes for F Magnetic Resonance Imaging (MRI) in paramagnetic complexes. Using a macrocyclic BF-appended cyclen ligand, complexes of Ni and Co cations were synthesized and exhibited very fast and relaxation times that improve F MRI detection. Notably, the cobalt complex presents the fastest F MRI relaxation reported to date for a Co-based probe.
View Article and Find Full Text PDFACS Sens
August 2025
Key Laboratory of Resource Chemistry of Ministry of Education, Shanghai Key Laboratory of Rare Earth Functional Materials, and Department of Chemistry, Shanghai Normal University, Shanghai 200234, China.
Fluorine magnetic resonance imaging (F MRI) is a rapidly growing field with significant potential for clinical diagnostics, but it is hindered by inherently low sensitivity. Developing stimuli-responsive F MRI probes with dual-signal capabilities enhances diagnostic sensitivity but remains highly challenging. Herein, we designed pH-activatable F MRI probes based on fluorinated spiropyrans, engineered through spiro-isomerism (pH-triggered merocyanine-spiropyran interconversion) and positional-isomerism (strategically tuning F-substitution positions on the spiropyran core) strategies to achieve unprecedented ratiometric F NMR chemical shift variations (Δδ) of up to 13 ppm.
View Article and Find Full Text PDFJ Control Release
August 2025
State Key Laboratory of Magnetic Resonance Spectroscopy and Imaging, National Center for Magnetic Resonance in Wuhan, Wuhan Institute of Physics and Mathematics, Innovation Academy for Precision Measurement Science and Technology, Chinese Academy of Sciences-Wuhan National Laboratory for Optoelectro
Developing nanomedicines from natural sources with synergistic effects to activate effective antitumor immune response remains a significant challenge. Here, we present a fluorinated bovine serum albumin (BSA)-based self-assembling nanoplatform that integrates chemotherapy (Chemo) and chemodynamic therapy (CDT) to induce immunogenic cell death (ICD) of breast cancer. This nanoplatform efficiently encapsulates doxorubicin (DOX) and fluorine-19 magnetic resonance imaging (F MRI)-sensitive F-oil in its core, with gallic acid (GA)-stabilized Fe on its surface.
View Article and Find Full Text PDFMater Horiz
July 2025
Shenzhen Campus of Sun Yat-Sen University, School of Biomedical Engineering, China.
The construction of highly efficient theranostic materials is critical for accurate lesion diagnosis and treatment. Among various diagnostic modalities, magnetic resonance imaging (MRI) is gaining attention due to its safety and precision. This study presents a novel theranostic agent, TPZ@TSF, that integrates F MRI for diagnostic imaging with photodynamic therapy (PDT) and hypoxia-activated tirapazamine (TPZ) as therapeutic modalities.
View Article and Find Full Text PDFInt J Oncol
August 2025
Department of Radiology, Chengdu Seventh People's Hospital (Affiliated Cancer Hospital of Chengdu Medical College), Chengdu, Sichuan 610213, P.R. China.
Magnetic Resonance Imaging (MRI) relies on contrast agents to enhance image quality and diagnostic accuracy. Traditional metal‑based agents, such as gadolinium compounds, raise safety concerns due to potential toxicity and long‑term retention in the body. The present review examines recent advancements in non‑metal‑based MRI contrast agents, focusing on fluorine‑19 (19F) compounds, chemical exchange saturation transfer (CEST) agents, nitroxide radicals, and hyperpolarized carbon agents.
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