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© The Rockefeller University Press, 0022-1007/1999/10/1115/ $5.00
The Journal of Experimental Medicine, Volume 190, Number 8, October 18, 1999 1115-1122

Compromised OX40 Function in CD28-deficient Mice Is Linked with Failure to Develop CXC Chemokine Receptor 5–positive CD4 Cells and Germinal Centers

Lucy S.K. Walkera, Adam Gulbranson-Judgea, Sarah Flynna, Thomas Brockerb, Chandra Raykundaliaa, Margaret Goodalla, Reinhold Försterc, Martin Lippc, and Peter Lanea
a Department of Immunology, University of Birmingham Medical School, Birmingham B15 2TT, United Kingdom
b Max-Planck-Institute for Immunobiology, Freiburg D79108, Germany
c Max-Delbruck-Center for Molecular Medicine, Berlin D13122, Germany

Correspondence to: Peter Lane, Medical Research Council Centre for Immune Regulation, Birmingham Medical School, Vincent Dr., Birmingham B15 2TT, UK. Tel:44-121-414-4078 Fax:44-121-414-3599 E-mail:p.j.l.lane{at}bham.ac.uk.

Mice rendered deficient in CD28 signaling by the soluble competitor, cytotoxic T lymphocyte–associated molecule 4–immunoglobulin G1 fusion protein (CTLA4-Ig), fail to upregulate OX40 expression in vivo or form germinal centers after immunization. This is associated with impaired interleukin 4 production and a lack of CXC chemokine receptor (CXCR)5 on CD4 T cells, a chemokine receptor linked with migration into B follicles. Germinal center formation is restored in CTLA4-Ig transgenic mice by coinjection of an agonistic monoclonal antibody to CD28, but this is substantially inhibited if OX40 interactions are interrupted by simultaneous injection of an OX40-Ig fusion protein. These data suggest that CD28-dependent OX40 ligation of CD4 T cells at the time of priming is linked with upregulation of CXCR5 expression, and migration of T cells into B cell areas to support germinal center formation.

Key Words: CD28, OX40/OX40 ligand, germinal center, chemokine, T cell migration


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