Related Experiment Video
Updated: Sep 16, 2025
Positron Emission Tomography Imaging for In Vivo Measuring of Myelin Content in the Lysolecithin Rat Model of Multiple Sclerosis
Published on: February 28, 2021
The Future of PET Imaging in Multiple Sclerosis: Characterisation of Individual White Matter Lesions
Chris W J van der Weijden1,2, Jan F Meilof3,4,5, Anouk van der Hoorn1
1Department of Radiology, University Medical Center Groningen, University of Groningen, 9713 GZ Groningen, The Netherlands.
Abstract:
Multiple sclerosis (MS) is a multifaceted inflammatory, demyelinating, and neurodegenerative disease typified by lesions with distinct hallmarks in the central nervous system. Dysregulation of micro-environmental factors, including extracellular matrix (ECM) remodelling and glial cell activation, has a decisive effect on lesion development and disease progression. Understanding the biological and pathological features of lesions would aid in prognosis and personalised treatment decision making. Positron emission tomography (PET) is an imaging technique that uses radio-labelled tracers to detect specific biological phenomena. Recent PET hardware developments enable high-resolution, quantitative imaging, which may allow biological characterisation of relatively small MS lesions. PET may complement MRI by offering objective, quantitative insights into lesion characteristics, including myelin density, inflammation and axonal integrity. Moreover, PET may provide information on lesion traits supporting decision making on upcoming therapeutic strategies for progressive MS, such as the availability of oligodendrocyte progenitor cells and ECM composition that affect remyelination and/or axon regeneration. This review explores the cellular and molecular ECM signatures and neuropathological processes of white matter MS lesions, discusses current and potential novel PET targets that may help characterise MS lesions in vivo, and addresses the potential of PET as a decision tool for selection and evaluation of therapeutic strategies, with a focus on remyelination.
Insights
Positron emission tomography (PET) offers new ways to understand multiple sclerosis (MS) lesions by providing quantitative imaging of myelin, inflammation, and axonal integrity. This can guide personalized treatment strategies for progressive MS, focusing on remyelination.
Area of Science:
- Neuroscience
- Radiology
- Immunology
Background:
- Multiple sclerosis (MS) is a complex inflammatory, demyelinating, and neurodegenerative disease affecting the central nervous system.
- Lesion development and disease progression in MS are significantly influenced by micro-environmental factors like extracellular matrix (ECM) remodeling and glial cell activation.
Purpose of the Study:
- To explore cellular and molecular ECM signatures and neuropathological processes in white matter MS lesions.
- To discuss current and potential novel positron emission tomography (PET) targets for in vivo characterization of MS lesions.
- To address the potential of PET as a decision-making tool for selecting and evaluating therapeutic strategies, particularly for remyelination in progressive MS.
Main Methods:
- Review of existing literature on MS neuropathology and ECM.
- Analysis of advancements in PET hardware for high-resolution, quantitative imaging.
- Exploration of PET tracers targeting biological phenomena relevant to MS lesions.
Main Results:
- Recent PET developments allow for high-resolution, quantitative imaging, potentially enabling biological characterization of small MS lesions.
- PET can complement MRI by providing objective, quantitative insights into lesion characteristics such as myelin density, inflammation, and axonal integrity.
- PET may offer crucial information on lesion traits relevant to therapeutic strategies, including oligodendrocyte progenitor cell availability and ECM composition impacting remyelination and axon regeneration.
Conclusions:
- Understanding MS lesion biology through advanced imaging techniques like PET is crucial for prognosis and personalized treatment.
- PET imaging holds significant potential to characterize MS lesions in vivo and guide therapeutic decisions, especially in progressive forms of the disease.
- PET can serve as a valuable tool for evaluating the efficacy of therapeutic strategies aimed at remyelination and neuroprotection in multiple sclerosis.
