The Journal of Experimental Medicine
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Published online 8 August 2000.
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© The Rockefeller University Press, 0022-1007/2000/8/393/ $5.00
The Journal of Experimental Medicine, Volume 192, Number 3, August 7, 2000 393-404


Original Article

Clonal Expansions of CD8+ T Cells Dominate the T Cell Infiltrate in Active Multiple Sclerosis Lesions as Shown by Micromanipulation and Single Cell Polymerase Chain Reaction

Holger Babbea, Axel Roersa, Ari Waismana, Hans Lassmannc, Norbert Goebelsd, Reinhard Hohlfeldd, Michael Frieseb, Roland Schröderb, Martina Deckerte, Stephan Schmidtf, Rivka Ravidg, and Klaus Rajewskya
a Institute for Genetics, Institute for Pathology, University of Cologne, 50931 Cologne, Germany
b Department of Neuropathology, Institute for Pathology, University of Cologne, 50931 Cologne, Germany
c Department of Neuroimmunology, Brain Research Institute, University of Vienna, 1090 Vienna, Austria
d Department of Neuroimmunology, Max-Planck-Institute for Neurobiology, 82152 Martinsried, Germany
e Department of Neuropathology, University of Bonn, 53105 Bonn, Germany
f Department of Neurology, University of Bonn, 53105 Bonn, Germany
g Netherlands Brain Bank, 1105 AZ Amsterdam, The Netherlands

Correspondence to: Axel Roers, Department of Immunology, Institute for Genetics, University of Cologne, Weyertal 121, 50931 Cologne, Germany. Tel:49-221-478-4543 Fax:49-221-478-6360 E-mail:axel.roers{at}uni-koeln.de.

Clonal composition and T cell receptor (TCR) repertoire of CD4+ and CD8+ T cells infiltrating actively demyelinating multiple sclerosis (MS) lesions were determined with unprecedented resolution at the level of single cells. Individual CD4+ or CD8+ T cells were isolated from frozen sections of lesional tissue by micromanipulation and subjected to single target amplification of TCR-ß gene rearrangements. This strategy allows the assignment of a TCR variable region (V region) sequence to the particular T cell from which it was amplified. Sequence analysis revealed that in both cases investigated, the majority of CD8+ T cells belonged to few clones. One of these clones accounted for 35% of CD8+ T cells in case 1. V region sequence comparison revealed signs of selection for common peptide specificities for some of the CD8+ T cells in case 1. In both cases, the CD4+ T cell population was more heterogeneous. Most CD4+ and CD8+ clones were represented in perivascular infiltrates as well as among parenchymal T cells. In case 2, two of the CD8+ clones identified in brain tissue were also detected in peripheral blood. Investigation of the antigenic specificities of expanded clones may help to elucidate their functional properties.

Key Words: autoimmunity, demyelinating disease, T cell receptor ß chain, gene rearrangement, peripheral blood


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