Document Detail

18F-FDG PET Detects Inflammatory Infiltrates in Spinal Cord Experimental Autoimmune Encephalomyelitis Lesions.
MedLine Citation:
PMID:  22738927     Owner:  NLM     Status:  Publisher    
Multiple sclerosis (MS) is a heterogeneous disease with respect to lesion pathology, course of disease, and treatment response. Imaging modalities are needed that allow better definition of MS lesions in vivo. The aim of this study was to establish an MRI- and PET/CT-based imaging modality and to evaluate approved and promising PET tracers in experimental autoimmune encephalomyelitis (EAE), the animal model of MS. METHODS: MRI and PET/CT scans were obtained in Dark agouti rats with EAE and healthy control rats. The PET tracers 2-(18)F-fluoro-2-deoxy-D-glucose ((18)F-FDG), 3'-deoxy-3'-(18)F-fluorothymidine ((18)F-FLT), and O-(2-(18)F-fluoro-ethyl)-L-tyrosine ((18)F-FET) were used as surrogate markers of glucose utilization, proliferative activity, and amino acid transport and protein biosynthesis. Immediately after the PET/CT scan, animals were sacrificed for autoradiography, histologic work-up, or RNA expression analysis. RESULTS: EAE lesions were predominantly located in the spinal cord. With MRI, we were able to detect inflammatory lesions in diseased rats, which correlated well with inflammatory infiltrates as determined by histology. Increased (18)F-FDG uptake was observed in spinal cord lesions in all diseased rats. Further investigation by volume-of-interest analysis demonstrated a correlation between the density of histologically proven cellular infiltrates and the (18)F-FDG signal intensity in PET (F(DF=3) = 5.9, P = 0.001) and autoradiography (F(DF=3) = 4.2, P = 0.008). With (18)F-FET and (18)F-FLT, no definite uptake could be observed on PET scans, whereas autoradiography showed slight radiotracer accumulation in some lesions. CONCLUSION: Spinal cord inflammatory lesions in the EAE model can be noninvasively visualized in vivo using MRI and (18)F-FDG PET/CT. Localized (18)F-FDG uptake correlates better with a histologically proven abundance of inflammatory cells as a critical marker of disease activity than MRI. Neither (18)F-FET nor (18)F-FLT seems to be a suitable marker for the in vivo detection of inflammatory lesions.
Dorothea Buck; Annette Förschler; Constantin Lapa; Tibor Schuster; Patrick Vollmar; Thomas Korn; Stefan Nessler; Christine Stadelmann; Alexander Drzezga; Andreas K Buck; Hans-Jürgen Wester; Claus Zimmer; Bernd-Joachim Krause; Bernhard Hemmer
Related Documents :
18249667 - Improved wavelet-based watermarking through pixel-wise masking.
18249657 - An algorithm for compression of bilevel images.
22738927 - 18f-fdg pet detects inflammatory infiltrates in spinal cord experimental autoimmune enc...
15132507 - Multichannel magnetic stimulation system design considering mutual couplings among the ...
22941147 - Parosteal ossifying lipoma of the fibula: a case report with contrast-enhanced mr study...
15466097 - Apparent diffusion coefficient in the posterior limb of the internal capsule predicts o...
Publication Detail:
Type:  JOURNAL ARTICLE     Date:  2012-6-27
Journal Detail:
Title:  Journal of nuclear medicine : official publication, Society of Nuclear Medicine     Volume:  -     ISSN:  1535-5667     ISO Abbreviation:  -     Publication Date:  2012 Jun 
Date Detail:
Created Date:  2012-6-28     Completed Date:  -     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  0217410     Medline TA:  J Nucl Med     Country:  -    
Other Details:
Languages:  ENG     Pagination:  -     Citation Subset:  -    
Department of Neurology, Technische Universität München, Munich, Germany.
Export Citation:
APA/MLA Format     Download EndNote     Download BibTex
MeSH Terms

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine

Previous Document:  Accuracy and Reproducibility of Lymphoscintigraphy for Sentinel Node Detection in Patients with Cuta...
Next Document:  Repeated sorption of water in SBA-15 investigated by means of in situ small-angle x-ray scattering.