AI Article Synopsis
- Brain uptake of standard acetate is inadequate for accurately imaging astrocytic oxidative metabolism.
- Researchers created a new compound, benzyl [1-(11)C]acetate ([1-(11)C]BA), which showed significantly improved brain uptake in PET studies.
- The findings suggest that [1-(11)C]BA may serve as an effective PET probe for evaluating the oxidative metabolism of astrocytes, as its uptake was reduced by fluorocitrate.
Article Abstract
Brain uptake of acetate is insufficient for obtaining a quantitative image of astrocytic oxidative metabolism. To improve the brain uptake of [1-(11)C]acetate, we synthesized benzyl [1-(11)C]acetate ([1-(11)C]BA) and conducted a positron emission tomography (PET) study assessing astrocytic oxidative metabolism. The brain uptake of [1-(11)C]BA was markedly higher compared with [1-(11)C]acetate, and disappeared with a half-life of 20 min in all regions studied. The brain uptake of [1-(11)C]BA was significantly decreased by fluorocitrate. The results indicate that [1-(11)C]BA could be a useful PET probe for assessing astrocytic oxidative metabolism.
Download full-text PDF |
Source |
|---|---|
| http://dx.doi.org/10.1016/j.apradiso.2013.04.025 | DOI Listing |
Publication Analysis
Top Keywords
Similar Publications
Neural substrates underlying distinct dual cognitive syndromes in Parkinson's disease.
Eur J Neurol
January 2025
Department of Human Health Sciences, Kyoto University Graduate School of Medicine, Kyoto, Japan.
Background: A dual-syndrome hypothesis, which states the cognitive impairments in Parkinson's disease (PD) are attributable to frontostriatal dopaminergic dysregulation and cortical disturbance-each associated with attention/executive and memory/visuospatial dysfunction, respectively-has been widely accepted. This multisystem contribution also underlies highly heterogeneous progression rate to dementia.
Methods: Nondemented PD patients who underwent [I]N-ω-fluoropropyl-2β-carbomethoxy-3β-(4-iodophenyl) nortropane ([I]FP-CIT) SPECT and neuropsychological examinations were enrolled.
Differential cortical aspartate uptake across the oestrous cycle is associated with changes in gut microbiota in Wistar-Kyoto rats.
Neurosci Lett
December 2024
Department of Anatomy and Neuroscience, University College Cork, Ireland; APC Microbiome Ireland, University College Cork, Ireland.
Pain and psychological stress are intricately linked, with sex differences evident in disorders associated with both systems. Glutamatergic signalling in the central nervous system is influenced by gonadal hormones via the hypothalamic-pituitary-adrenal axis and is central in pain research. Emerging evidence supports an important role for the gut microbiota in influencing pain signalling.
View Article and Find Full Text PDFA shorter linker in the bispecific antibody RmAb158-scFv8D3 improves TfR-mediated blood-brain barrier transcytosis in vitro.
Sci Rep
December 2024
Department of Pharmacy, Uppsala University, Uppsala, Sweden.
Transferrin Receptor (TfR)-mediated transcytosis across the blood-brain barrier (BBB) enables the uptake of bispecific therapeutic antibodies into the brain. At therapeutically relevant concentrations, bivalent binding to TfR appears to reduce the transcytosis efficiency by receptor crosslinking. In this study, we aimed to improve BBB transcytosis of symmetric antibodies through minimizing their ability to cause TfR crosslinking.
View Article and Find Full Text PDFDevelopment and evaluation of deuterated [F]JHU94620 isotopologues for the non-invasive assessment of the cannabinoid type 2 receptor in brain.
EJNMMI Radiopharm Chem
December 2024
Department of Experimental Neurooncological Radiopharmacy, Institute of Radiopharmaceutical Cancer Research, Helmholtz-Zentrum Dresden-Rossendorf, Research Site Leipzig, Permoserstrasse 15, 04318, Leipzig, Germany.
Background: The cannabinoid type 2 receptors (CB2R) represent a target of increasing importance in neuroimaging due to its upregulation under various neuropathological conditions. Previous evaluation of [F]JHU94620 for the non-invasive assessment of the CB2R availability by positron emission tomography (PET) revealed favourable binding properties and brain uptake, however rapid metabolism, and generation of brain-penetrating radiometabolites have been its main limitations. To reduce the bias of CB2R quantification by blood-brain barrier (BBB)-penetrating radiometabolites, we aimed to improve the metabolic stability by developing -d and -d deuterated isotopologues of [F]JHU94620.
View Article and Find Full Text PDFEstimating the energy of dissipative neural systems.
Cogn Neurodyn
December 2024
First Department of Neurology, St. Anne's University Hospital, Faculty of Medicine, Masaryk University, Brno, Czech Republic.
There is, at present, a lack of consensus regarding precisely what is meant by the term 'energy' across the sub-disciplines of neuroscience. Definitions range from deficits in the rate of glucose metabolism in consciousness research to regional changes in neuronal activity in cognitive neuroscience. In computational neuroscience virtually all models define the energy of neuronal regions as a quantity that is in a continual process of dissipation to its surroundings.
View Article and Find Full Text PDFWant AI Summaries of new PubMed Abstracts delivered to your In-box?
Enter search terms and have AI summaries delivered each week - change queries or unsubscribe any time!