期刊
JOURNAL OF NEUROSCIENCE
卷 29, 期 46, 页码 14663-14669出版社
SOC NEUROSCIENCE
DOI: 10.1523/JNEUROSCI.4082-08.2009
关键词
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资金
- National Multiple Sclerosis Society
- Myelin Repair Foundation
- Dana Foundation
- National Institute of Neurodegenerative Disorders and Stroke [R01 NS061837, NS054109]
Destruction or changes associated with myelin membranes in the CNS play a key role in the pathogenesis of multiple sclerosis and other related neurodegenerative disorders. Along-standing goal has been to detect and quantify myelin content in vivo. For this reason, we have developed a myelin-imaging technique based on positron emission tomography (PET). PET is a quantitative imaging modality that has been widely used in clinical settings for direct assessment of biological processes at the molecular level. However, lack of myelin-imaging probes has hampered the use of PET for imaging of myelination in the CNS. Here, we report a myelin-imaging agent, termed Case Imaging Compound (CIC) that readily penetrates the blood-brain barrier and preferentially localizes to myelinated regions of the brain. After radiolabeling with positron-emitting carbon-11, [(11)C] CIC-PET was conducted in longitudinal studies using a lysolethicin-induced rat model of focal demyelination and subsequent remyelination. Quantitative analysis showed that the retention of [(11)C] CIC correlates with the level of demyelination/remyelination. These studies indicate that, for the first time, [(11)C] CIC-PET can be used as an imaging marker of myelination, which has the potential to be translated into clinical studies in multiple sclerosis and other myelin-related diseases for early diagnosis, subtyping, and efficacy evaluation of therapeutic treatments aimed at myelin repair.
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