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Aberrant high expression of B lymphocyte chemokine (BLC/CXCL13) by C11b+CD11c+ dendritic cells in murine lupus and preferential chemotaxis of B1 cells towards BLC

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Official URL:http://www.jem.org/cgi/content/abstract/193/12/1393
PubMed:View item in PubMed
Creators Name:Ishikawa, S. and Sato, T. and Abe, M. and Nagai, S. and Onai, N. and Yoneyama, H. and Zhang, Y.Y. and Suzuki, T. and Hashimoto, S. and Shirai, T. and Lipp, M. and Matsushima, K.
Journal Title:Journal of Experimental Medicine
Journal Abbreviation:J Exp Med
Page Range:1393-1402
Date:18 June 2001
Keywords:Chemokine, Lupus, Dendritic Cells, B1 Cells, T Cells, Animals, Mice
Abstract:We observed here that the expression of B lymphocyte chemokine (BLC/CXCL13) was markedly enhanced in the thymus and kidney in aged (NZB x NZW)F1 (BWF1) mice developing lupus nephritis, but not in similarly aged NZB and NZW mice. BLC-positive cells were present in the cellular infiltrates in the target organs with a reticular pattern of staining. CD11b+CD11c+ dendritic cells were increased in the thymus and spleen in aged BWF1 mice and identified as the major cell source for BLC. CD4+ T cells as well as B cells were dramatically increased in the thymus in aged BWF1 mice, whereas no increase was observed in aged NZB and NZW mice. B1/B2 ratio in the thymus was significantly higher than those in the spleen and peripheral blood in aged BWF1 mice. Interestingly, BLC showed preferential chemotactic activity for B1 cells derived from several mouse strains, including nonautoimmune mice. Cell surface CXCR5 expression on B1 cells was significantly higher than that on B2 cells. Thus, aberrant high expression of BLC by myeloid dendritic cells in the target organs in aged BWF1 mice may play a pivotal role in breaking immune tolerance in the thymus and in recruiting autoantibody-producing B cells in the development of murine lupus.
Publisher:Rockefeller University Press (U.S.A.)
Item Type:Article

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