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| Content Provider | World Health Organization (WHO)-Global Index Medicus |
|---|---|
| Author | Eisenberg, Robert A. Song, Wen-Chao Miwa, Takashi Madaio, Michael P. Maldonado, Michael A. Zhou, Lin |
| Description | Country affiliation: United States Author Affiliation: Miwa T ( Department of Pharmacology, Perelman School of Medicine, University of Pennsylvania, Philadelphia, PA 19104, USA.) |
| Abstract | CD59 is a GPI-anchored membrane regulator of complement expressed on blood cells as well as peripheral tissues. It protects host cells from complement injury by inhibiting formation of the membrane attack complex. Recent studies in mice have suggested also a role of CD59 in T cell immune response that was mechanistically independent of complement. In the present study, we investigated the function of CD59 in the MRL/lpr model of murine lupus. We backcrossed the Cd59a knockout (Cd59a(-/-)) mouse onto the MRL/lpr background and compared Cd59a(+/+)-MRL/lpr and Cd59a(-/-)-MRL/lpr littermates for the development of systemic autoimmunity. We found that CD59a deficiency significantly exacerbated the skin disease and lymphoproliferation characteristic of MRL/lpr mice. It also increased autoantibody titers and caused a higher level of proteinuria in male MRL/lpr mice. Bone marrow transfer experiments indicated that CD59a expression on both bone marrow-derived cells and peripheral tissues played a role in lymphoproliferation, whereas the skin disease phenotype is determined mainly by local CD59a expression. Importantly, C3 gene deletion or C5 neutralization with a blocking mAb in Cd59a(-/-)-MRL/lpr mice did not rescue the proautoimmune phenotype associated with CD59a deficiency. These results together suggest that CD59a inhibits systemic autoimmunity in MRL/lpr mice through a complement-independent mechanism. |
| ISSN | 00221767 |
| e-ISSN | 15506606 |
| DOI | 10.4049/jimmunol.1201621 |
| Journal | The Journal of Immunology |
| Issue Number | 11 |
| Volume Number | 189 |
| Language | English |
| Publisher | The American Association of Immunologists |
| Publisher Date | 2012-12-01 |
| Publisher Place | United States |
| Access Restriction | Open |
| Subject Keyword | Antigens, Cd59 Immunology Autoantibodies Biosynthesis Autoimmunity Lupus Erythematosus, Systemic Anemia, Hemolytic Genetics Animals Antibodies Pharmacology Complement C3 Deficiency Complement C5 Antagonists & Inhibitors Dermatitis Pathology Gene Expression Hemoglobinuria Mice Mice, Inbred Mrl Lpr Mice, Knockout Proteinuria Sex Factors Skin T-lymphocytes Research Support, N.i.h., Extramural Discipline Immunology |
| Content Type | Text |
| Resource Type | Article |
| Subject | Immunology and Allergy Immunology |
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