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The regulation of FasL expression: a distinguishing feature between monocytes and T lymphocytes/NK cells with possible implications for SLE
Umeå University, Faculty of Medicine, Department of Clinical Microbiology.
Umeå University, Faculty of Medicine, Department of Public Health and Clinical Medicine, Reumatology.
2001 (English)In: Journal of Clinical Immunology, ISSN 0271-9142, E-ISSN 1573-2592, Vol. 21, no 3, 183-192 p.Article in journal (Refereed) Published
Abstract [en]

Monocytes and lymphocytes from patients with systemic lupus erythematosus (SLE) had a higher cell surface expression of Fast than the corresponding cells from healthy individuals. Inhibitors of metalloproteases upregulated the surface expression of Fast in peripheral blood lymphocytes (PBL), indicating that a metalloprotease is responsible for the cleavage of FasL. The level of sFasL in serum was slightly increased in the patient group compared to the controls. Therefore, the possible contribution of various mononuclear cell types to the release of Fast was analyzed. Isolated NK cells and T lymphocytes released Fast into the medium and the release was prevented by inhibitors of metalloproteases. In contrast, isolated monocytes did not release Fast. FasR expression was elevated in patients with inverted CD4/CD8 ratio, while Fast expression showed no relationship to CD4/CD8 ratio. The absence of Fast release by isolated cells and a high level of surface expression of Fast distinguish monocytes and T lymphocytes/NK cells.

Place, publisher, year, edition, pages
2001. Vol. 21, no 3, 183-192 p.
Keyword [en]
apoptosis; lupus; T lymphocytes; monocytes
National Category
Rheumatology and Autoimmunity
URN: urn:nbn:se:umu:diva-39173DOI: 10.1023/A:1011035115342OAI: diva2:388900
Available from: 2011-01-18 Created: 2011-01-18 Last updated: 2011-01-21Bibliographically approved

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Eneslätt, KjellRantapää-Dahlqvist, Solbritt
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