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- Document type:
- Journal Article
- Author(s):
- Simon, GH; Daldrup-Link, HE; Kau, J; Metz, S; Schlegel, J; Piontek, G; Saborowski, O; Demos, S; Duyster, J; Pichler, BJ
- Title:
- Optical imaging of experimental arthritis using allogeneic leukocytes labeled with a near-infrared fluorescent probe.
- Abstract:
- PURPOSE: The purpose of this study was to assess the feasibility of inflammation detection in an antigen-induced arthritis model using fluorescent leukocytes and optical imaging. METHODS: Antigen-mediated monoarthritis was induced in the right knee of 12 Sprague-Dawley rats. Six rats remained untreated and six rats were treated with cortisone. All rats received ex vivo fluorescent-labeled rat leukocytes. Optical images of both knees were acquired before and at 5 min, 1 h, 4 h, and 24 h after cell injection. Images were evaluated qualitatively and quantitatively by calculating signal intensity ratios between the right arthritic (A) and contralateral normal (N) knee. A/N ratios were tested for significant differences between baseline values and values after cell injection using a paired t test as well as between the untreated and cortisone-treated group using an unpaired t test. Synovial specimens were processed and evaluated for labeled cells with fluorescence microscopy. RESULTS: At 4 h and 24 h p.i., the A/N ratios of untreated arthritic knees showed a significant signal increase compared with baseline values (p<0.05) and a significant difference compared with A/N ratios of cortisone-treated animals (p<0.05). Fluorescent microscopy confirmed the presence of labeled cells in the arthritic synovium. CONCLUSION: Inflammation in antigen-induced arthritis can be detected with ex vivo labeled allogenic leukocytes and optical imaging.
- Journal title abbreviation:
- Eur J Nucl Med Mol Imaging
- Year:
- 2006
- Journal volume:
- 33
- Journal issue:
- 9
- Pages contribution:
- 998-1006
- Language:
- eng
- Fulltext / DOI:
- doi:10.1007/s00259-006-0081-y
- Pubmed ID:
- http://view.ncbi.nlm.nih.gov/pubmed/16770602
- Print-ISSN:
- 1619-7070
- TUM Institution:
- III. Medizinische Klinik und Poliklinik (Hämatologie / Onkologie); Institut für Allgemeine Pathologie und Pathologische Anatomie
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