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Section of Immunobiology and
Department of Laboratory Medicine, Yale University School of Medicine, New Haven, CT 06520
A conventional view of the pathogenesis of systemic lupus erythematosus has emerged. The role of B cells is to secrete pathogenic autoantibodies, while the role of T cells is to provide help for autoantibody-producing B cells. A problem with this view is that spontaneous T cell activation as well as T cell infiltration of organs such as kidney and skin are prominent features in systemic lupus erythematosus patients and murine models of lupus. The identification of T cell infiltrates, in particular, suggests that autoantibody-mediated damage may be only part of the story and that T cells could also play a primary role in immune-mediated pathology. To test the role of B cells directly, we previously generated autoimmune-prone MRL-lpr/lpr mice that lack B cells. The complete absence of T cell infiltrates in these mice was surprising, and it prompted us to examine whether a key role of B cells in disease evolution is to prime autoreactive T cells. Here we demonstrate, by comparing B cell-deficient and control mice, that the expansion of activated and memory T cells in the MRL-lpr/lpr mouse is indeed highly dependent on B cells. These results suggest a novel role for B cells in autoimmune disregulation.
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M. A. Maldonado, V. Kakkanaiah, G. C. MacDonald, F. Chen, E. A. Reap, E. Balish, W. R. Farkas, J. C. Jennette, M. P. Madaio, B. L. Kotzin, et al. The Role of Environmental Antigens in the Spontaneous Development of Autoimmunity in MRL-lpr Mice J. Immunol., June 1, 1999; 162(11): 6322 - 6330. [Abstract] [Full Text] [PDF] |
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O. T.M. Chan, L. G. Hannum, A. M. Haberman, M. P. Madaio, and M. J. Shlomchik A Novel Mouse with B Cells but Lacking Serum Antibody Reveals an Antibody-independent Role for B Cells in Murine Lupus J. Exp. Med., May 17, 1999; 189(10): 1639 - 1648. [Abstract] [Full Text] [PDF] |
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