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Updated: Feb 23, 2026

Hybrid PET/MRI Imaging of Alzheimer's Disease Based on 18F-AV-1451
Published on: April 18, 2025
[Positron Emission Tomography Imaging of Microglia in Diagnosis of Dementia]
1Division of Pharmaceutical Chemistry, Showa Pharmaceutical University.
Abstract:
Neuroinflammation which involves microglial activation is believed to be closely associated with the progression of neurodegeneration in Alzheimer's disease. The activation of microglia is receiving rising attention as a diagnostic and therapeutic target; however, it is important to distinguish its state and phenotype of the microglia. Positron emission tomography (PET) is a non-invasive method that can help visualize the changes of molecules associated with microglial activation in neurological disease under in vivo conditions. In this review, recent PET preclinical and clinical studies, and new molecular targets for the imaging of microglia are described.
Insights
Neuroinflammation, involving microglial activation, is key in Alzheimer's disease progression. Positron emission tomography (PET) offers a way to visualize and target these microglial changes for diagnosis and therapy.
Area of Science:
- Neuroscience
- Medical imaging
- Immunology
Background:
- Neuroinflammation, characterized by microglial activation, is closely linked to neurodegeneration in Alzheimer's disease.
- Understanding microglial states and phenotypes is crucial for developing effective diagnostic and therapeutic strategies.
- Positron emission tomography (PET) provides a non-invasive in vivo method to observe molecular changes related to microglial activation in neurological disorders.
Purpose of the Study:
- To review recent advancements in PET imaging for visualizing microglial activation in Alzheimer's disease.
- To discuss novel molecular targets for PET-based imaging of microglia.
- To highlight the potential of PET as a diagnostic and therapeutic tool for neurodegenerative diseases.
Main Methods:
- Review of preclinical and clinical studies utilizing Positron Emission Tomography (PET).
- Analysis of molecular targets for imaging microglial activation.
- Synthesis of current research on PET applications in neuroinflammation and neurodegeneration.
Main Results:
- PET imaging allows for in vivo visualization of molecular changes associated with microglial activation.
- Several novel molecular targets are emerging for PET-based microglia imaging.
- PET studies provide insights into the role of neuroinflammation in Alzheimer's disease progression.
Conclusions:
- PET is a valuable tool for studying neuroinflammation and microglial dynamics in Alzheimer's disease.
- Targeting specific microglial states and phenotypes via PET imaging holds therapeutic potential.
- Continued research into molecular targets will enhance PET's diagnostic and therapeutic capabilities for neurodegenerative conditions.
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