PET Imaging Study of S1PR1 Expression in a Rat Model of Multiple Sclerosis
Journal Article
·
· Molecular Imaging and Biology
- Washington Univ. School of Medicine, St. Louis, MO (United States); OSTI
- Washington Univ. School of Medicine, St. Louis, MO (United States)
Upregulation of sphingosine-1-phosphate receptor 1 (S1PR1) expression in multiple sclerosis (MS) lesions is associated with neuroinflammatory response. This study investigated the correlation between neuroinflammation and S1PR1 expression in the spinal cord of an experimental autoimmune encephalomyelitis (EAE) rat model of MS, using the S1PR1 positron emission tomography (PET) radiotracer [11C]TZ3321. MicroPET imaging studies of [11C]TZ3321 were performed to measure uptake of [11C]TZ3321 in the spinal cord of EAE rats. Immunohistochemical staining was performed to confirm the overexpression of S1PR1 and other inflammatory biomarkers. MicroPET imaging demonstrated a 20–30 % increase in [11C]TZ3321 uptake in the lumbar spinal cord of EAE rats versus sham controls at 35–60 min post injection. The increased uptake of [11C]TZ3321 was correlated with the overexpression of S1PR1 in the lumbar spinal cord of EAE rats that was confirmed by immunohistochemical staining. Upregulated S1PR1 expression was associated with glial cell activation and immune cell infiltration. MicroPET imaging modality with a specific radioligand [11C]TZ3321 is able to assess the expression of S1PR1 in EAE rat lumbar spinal cord. This may provide a new approach to the assessment of neuroinflammatory response in MS and other inflammatory diseases.
- Research Organization:
- Washington Univ. School of Medicine, St. Louis, MO (United States)
- Sponsoring Organization:
- USDOE
- Grant/Contract Number:
- SC0008432
- OSTI ID:
- 1463267
- Journal Information:
- Molecular Imaging and Biology, Journal Name: Molecular Imaging and Biology Journal Issue: 5 Vol. 18; ISSN 1536-1632
- Country of Publication:
- United States
- Language:
- English
Similar Records
Pharmacologic characterizations of a P2X7 receptor-specific radioligand, [11C]GSK1482160 for neuroinflammatory response
Syntheses and in vitro biological evaluation of S1PR1 ligands and PET studies of four F-18 labeled radiotracers in the brain of nonhuman primates
Tetramethylpyrazine ameliorates experimental autoimmune encephalomyelitis by modulating the inflammatory response
Journal Article
·
Sun Apr 30 20:00:00 EDT 2017
· Nuclear Medicine Communications
·
OSTI ID:1469801
Syntheses and in vitro biological evaluation of S1PR1 ligands and PET studies of four F-18 labeled radiotracers in the brain of nonhuman primates
Journal Article
·
Wed Nov 14 19:00:00 EST 2018
· Organic and Biomolecular Chemistry
·
OSTI ID:1611052
Tetramethylpyrazine ameliorates experimental autoimmune encephalomyelitis by modulating the inflammatory response
Journal Article
·
Sat Sep 15 00:00:00 EDT 2018
· Biochemical and Biophysical Research Communications
·
OSTI ID:23134319