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Ghonim M, Ghonim M, Kim Redden HW, Gharavi D, Mamidi RS, Patel DA, Mirbod M, Revheim ME, Werner TJ, Newberg AB, Alavi A, Ayubcha C. Structural and Molecular Imaging of Aging Brain: A Focus on MR Imaging and PET Modalities. PET Clin 2025; 20:67-88. [PMID: 39547732 DOI: 10.1016/j.cpet.2024.09.007] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2024]
Abstract
The process of aging in the brain is reflective of various factors including the environment, lifestyle, genetics, and management of concurrent chronic conditions. Aging in the brain leads to observable structural changes on neuroimaging, such as brain volume reduction, neuronal atrophy, and synaptic loss, which affect higher cognitive functions. Positron emission tomography imaging can help visualize these changes earlier before structural changes even take place and the associated decline in brain function, revealing important insights into how the brain ages and the impact on neural connectivity and cognitive abilities.
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Affiliation(s)
- Mohamed Ghonim
- Department of Radiology, Hospital of the University of Pennsylvania, PA, USA; Department of Radiology, Ain Shams University, Cairo, Egypt
| | - Mohanad Ghonim
- Department of Radiology, Hospital of the University of Pennsylvania, PA, USA; Department of Radiology, Ain Shams University, Cairo, Egypt
| | | | - Daniel Gharavi
- Department of Radiology, Hospital of the University of Pennsylvania, PA, USA; Virginia Commonwealth University, Richmond, VA, USA
| | - Ramya S Mamidi
- Department of Radiology, Hospital of the University of Pennsylvania, PA, USA
| | - Dev A Patel
- Department of Radiology, Hospital of the University of Pennsylvania, PA, USA; Sidney Kimmel Medical College, Philadelphia, PA, USA
| | - Melika Mirbod
- Department of Radiology, Hospital of the University of Pennsylvania, PA, USA
| | - Mona-Elisabeth Revheim
- Division for Technology and Innovation, The Intervention Center, Oslo University Hospital, Oslo, Norway; Institute of Clinical Medicine, Faculty of Medicine, University of Oslo, Oslo, Norway
| | - Thomas J Werner
- Department of Radiology, Hospital of the University of Pennsylvania, PA, USA
| | - Andrew B Newberg
- Marcus Institute of Integrative Health, Thomas Jefferson University, Philadelphia, PA, USA; Department of Radiology, Thomas Jefferson University, Philadelphia, PA, USA
| | - Abass Alavi
- Department of Radiology, Hospital of the University of Pennsylvania, PA, USA.
| | - Cyrus Ayubcha
- Harvard Medical School, Boston, MA, USA; Department of Epidemiology, Harvard T.H. Chan School of Public Health, Boston, MA, USA
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Chassé M, Vasdev N. Emerging targets for positron emission tomography imaging in proteinopathies. NPJ IMAGING 2024; 2:30. [PMID: 39185440 PMCID: PMC11338821 DOI: 10.1038/s44303-024-00032-4] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 04/12/2024] [Accepted: 07/16/2024] [Indexed: 08/27/2024]
Abstract
Positron emission tomography (PET) imaging of neurodegenerative disease has historically focused on a small number of established targets. The development of selective PET radiotracers for novel biological targets enables new ways to interrogate the neuropathology of proteinopathies and will advance our understanding of neurodegeneration. This perspective aims to highlight recent PET radiotracers developed for five emerging targets in proteinopathies (i.e., mHTT, BACE1, TDP-43, OGA, and CH24H).
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Affiliation(s)
- Melissa Chassé
- Azrieli Centre for Neuro-Radiochemistry, Brain Health Imaging Centre, Centre for Addiction and Mental Health, Campbell Family Mental Health Research Institute, Toronto, ON Canada
- Institute of Medical Science, Temerty Faculty of Medicine, University of Toronto, Toronto, ON Canada
| | - Neil Vasdev
- Azrieli Centre for Neuro-Radiochemistry, Brain Health Imaging Centre, Centre for Addiction and Mental Health, Campbell Family Mental Health Research Institute, Toronto, ON Canada
- Institute of Medical Science, Temerty Faculty of Medicine, University of Toronto, Toronto, ON Canada
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