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CD4 cytotoxic and dendritic cells in the immunopathologic lesion of Sjögren's syndrome
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Xanthou, G., Tapinos, N. I., Polihronis, M., Nezis, I. P., Margaritis, L. H. and Moutsopoulos, H. M. (1999) CD4 cytotoxic and dendritic cells in the immunopathologic lesion of Sjögren's syndrome. Clinical & Experimental Immunology, Volume 118 (Number 1). pp. 154-163. doi:10.1046/j.1365-2249.1999.01037.x ISSN 0009-9104.
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Official URL: http://dx.doi.org/10.1046/j.1365-2249.1999.01037.x
Abstract
The existence of CD4+ T lymphocytes with cytotoxic activity in minor salivary gland (MSG) biopsies from Sjögren's syndrome (SS) patients was investigated using in situ double immunohistochemistry technique. The presence of dendritic cells (DC) in SS lesions was examined by using single and double immunohistochemistry methods and a panel of different MoAbs to specific cell surface markers (i.e. CD3, CD11c, DRC). Furthermore, the ultrastructural morphology of DC was characterized by electron microscopy (EM). Immunogold labelling technique using the DRC surface marker was also applied. Finally, we investigated the existence of germinal centres (GC) in the salivary gland lesions of SS patients. Seven patients with primary SS and five patients with non-specific sialadenitis were the subjects of this study. Our results indicate the existence of a CD4+ cytotoxic cell population that utilizes perforin-mediated cell destructions as they expressed perforin mRNA. Quantitative analysis of these cells revealed that they comprised approximately 20% of the existing T lymphocytes. We also identified a population of CD4+ T cells that expressed the CD11c activation marker. Furthermore, we observed a distinct cell subtype which expressed the DRC cell surface marker. These cells had the characteristic ultrastructural morphology of DC and were DRC+ when examined by immunoelectron microscopy. Finally, the formation of GC structures in the histopathologic lesions of the salivary glands was observed. The above findings indicate that both CD4+ cytotoxic T lymphocytes (CTL) and DC may be involved in the initiation and perpetuation of SS pathogenesis. Moreover, the formation of GC in the lesions reveals a possible mechanism for in situ differentiation and proliferation of activated B lymphocytes.
Item Type: | Journal Article | ||||
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Divisions: | Faculty of Science, Engineering and Medicine > Science > Life Sciences (2010- ) | ||||
Journal or Publication Title: | Clinical & Experimental Immunology | ||||
Publisher: | Wiley-Blackwell Publishing Ltd. | ||||
ISSN: | 0009-9104 | ||||
Official Date: | 24 December 1999 | ||||
Dates: |
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Volume: | Volume 118 | ||||
Number: | Number 1 | ||||
Page Range: | pp. 154-163 | ||||
DOI: | 10.1046/j.1365-2249.1999.01037.x | ||||
Status: | Peer Reviewed | ||||
Publication Status: | Published | ||||
Access rights to Published version: | Restricted or Subscription Access |
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