Purpose: Tumor-to-background ratio (TBR) is a critical metric in oncologic PET imaging. This study aims to enhance the TBR of [F]FET in brain tumor imaging by substituting deuterium ("D") for hydrogen ("H"), thereby improving the diagnostic sensitivity and accuracy.
Methods: [F]d-FET was synthesised by two automated radiochemistry modules. Biodistribution studies and imaging efficacy were evaluated in vivo and ex vivo in rodent models, while metabolic stability and radiation dosimetry were assessed in non-human primates. Additionally, preliminary imaging evaluations were carried out in five brain tumor patients: three glioma patients underwent imaging with both [F]d-FET and [F]FET, and two patients with brain metastases were imaged using [F]d-FET and [F]FDG.
Results: [F]d-FET demonstrated high radiochemical purity and yield. PET/MRI in rodent models demonstrated superior TBR for [F]d-FET compared to [F]FET, and autoradiography showed tumor margins that correlated well with pathological extents. Studies in cynomolgus monkeys indicated comparable in vivo stability and effective dose with [F]FET. In glioma patients, [F]d-FET showed enhanced TBR, while in patients with brain metastases, [F]d-FET displayed superior lesion delineation compared to [F]FDG, especially in smaller metastatic sites.
Conclusion: We successfully synthesized the novel PET radiotracer [F]d-FET, which retains the advantageous properties of [F]FET while potentially enhancing TBR for glioma imaging. Preliminary studies indicate excellent stability, efficacy, and sensitivity of [F]d-FET, suggesting its potential in clinical evaluations of brain tumors.
Trial Registration: ChiCTR2400081576, registration date: 2024-03-05, https://www.chictr.org.cn/bin/project/edit?pid=206162.
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http://dx.doi.org/10.1007/s00259-024-06964-8 | DOI Listing |
Differentiation
December 2024
Department of Biochemistry and Molecular Biology, School of Basic Medical Sciences, Henan University, Kaifeng, 475004, China; Henan Provincial Engineering Center for Tumor Molecular Medicine, Kaifeng Key Laboratory of Cell Signal Transduction, Henan University, Kaifeng, 475004, China. Electronic address:
Current research has found that adipose tissue is not only involved in energy metabolism, but also a highly active endocrine organ that secretes various adipokines, including adiponectin, leptin, resistin and apelin, which are involved in the regulation of physiology and pathology of tissues and organs throughout the body. With the yearly increasing incidence, obesity has become a risk factor for a variety of pathological changes, including inflammation and metabolic syndrome in various system (endocrine, circulatory, locomotor and central nervous system). Thus these symptoms lead to multi-organ dysfunctions, including the heart, liver, kidneys, brain and joints.
View Article and Find Full Text PDFNat Cancer
December 2024
Department of Neurosurgery, Huashan Hospital, Shanghai Medical College, Fudan University, Shanghai, China.
The cerebrospinal fluid (CSF) border accommodates diverse immune cells that permit peripheral cell immunosurveillance. However, the intricate interactions between CSF immune cells and infiltrating cancer cells remain poorly understood. Here we use fate mapping, longitudinal time-lapse imaging and multiomics technologies to investigate the precise origin, cellular crosstalk and molecular landscape of macrophages that contribute to leptomeningeal metastasis (LM) progression.
View Article and Find Full Text PDFEur J Med Res
December 2024
Department of Gastrointestinal Surgery, Shandong Provincial Hospital, Shandong University, Jinan, 250021, Shandong, China.
The gut microbiota is a complex and dynamic ecosystem that plays a crucial role in human health and disease, including obesity, diabetes, cardiovascular diseases, neurodegenerative diseases, inflammatory bowel disease, and cancer. Chronic inflammation is a common feature of these diseases and is closely related to angiogenesis (the process of forming new blood vessels), which is often dysregulated in pathological conditions. Inflammation potentially acts as a central mediator.
View Article and Find Full Text PDFNeurochirurgie
December 2024
Institute of Functional Genomics, Montpellier University, CNRS, INSERM, Montpellier, France; French Brain Tumor DataBase (Recensement national histologique des Tumeurs Primitives du SNC), CHU/ICM Montpellier, Montpellier, France; Department of Medical Oncology, Institut régional du Cancer de Montpellier (ICM), University of Montpellier, Montpellier, France.
Background: The recent advent of anti-IDH therapies and changes in the WHO classification of gliomas implies estimating the number of patients who could benefit (or not) from anti-IDH treatment. As published data on the current incidence of different subtypes of IDH-mutant gliomas (based on the latest histomolecular WHO classification) are lacking in many countries. The present analysis aims to review the main factors impacting the incidence of gliomas and lower-grade gliomas and to estimate the incidence and prevalence of IDH-mutant gliomas in France.
View Article and Find Full Text PDFWorld Neurosurg
December 2024
Department of Neurological Surgery, the University of Alabama at Birmingham, Birmingham, AL, USA.
The authors present a comprehensive review on the history and development of oncolytic herpes simplex viral therapies for malignant glioma with a focus on mechanisms of delivery in prior and ongoing clinical trials. This review highlights the advancements made with regard to delivering these therapies to a highly complex immunologic environment in the setting of the blood brain and blood tumor barrier in a safe and effective manner.
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