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Blood, 1 November 2006, Vol. 108, No. 9, pp. 2897-2905. Prepublished online as a Blood First Edition Paper on July 20, 2006; DOI 10.1182/blood-2005-11-007237. This Article Full Text Full Text (PDF) All Versions of this Article: blood-2005-11-007237v1 108/9/2897    most recent Alert me when this article is cited Alert me if a correction is posted Citation Map Services Email this article to a friend Similar articles in this journal Similar articles in PubMed Alert me to new issues of the journal Download to citation manager Rights and Permissions Citing Articles Citing Articles via HighWire Citing Articles via CrossRef Citing Articles via Google Scholar Google Scholar Articles by Carrasco, J. Articles by van der Bruggen, P. Search for Related Content PubMed PubMed Citation Articles by Carrasco, J. Articles by van der Bruggen, P. Related Collections Immunobiology Chemokines, Cytokines, and Interleukins Social Bookmarking                   What's this?  Previous Article  |  Table of Contents  |  Next Article  CHEMOKINES, CYTOKINES, AND INTERLEUKINS CD45RA on human CD8 T cells is sensitive to the time elapsed since the last antigenic stimulation Javier Carrasco, Danièle Godelaine, Aline Van Pel, Thierry Boon, and Pierre van der Bruggen From the Ludwig Institute for Cancer Research, Brussels, Belgium; and the Institute of Cellular Pathology, Cellular Genetics Unit, Université Catholique de Louvain, Brussels, Belgium. The expression of CD45RA on CCR7– human CD8+ memory T cells is widely considered to be a marker of terminal differentiation. We studied the time course of CD45RA and CCR7 expression on human antitumoral cytotoxic T lymphocyte (CTL) clones and blood CD8+ T cells after antigenic stimulation. Our results indicate that CD45RA+CCR7– CD8+ T cells are resting memory cells that, upon antigenic stimulation and during the next 10 days, proliferate, lose CD45RA, and transiently acquire CCR7. In the absence of further antigenic stimulation, they progressively re-express CD45RA and become CD45RA+CCR7–. We conclude that the expression of CD45RA on these cells is indicative of the time elapsed since the last antigenic stimulation rather than the incapacity to proliferate or particularly high lytic potential. This concept leads to a reinterpretation of the significance of the presence of CD45RA+ CD8+ memory cells in patients affected by viral infections or by cancer. CiteULike    Connotea    Del.icio.us    Digg    Reddit    Technorati    What's this? This article has been cited by other articles: C. Lecuroux, I. Girault, A. Urrutia, J.-M. Doisne, C. Deveau, C. Goujard, L. Meyer, M. Sinet, and A. Venet Identification of a particular HIV-specific CD8+ T-cell subset with a CD27+ CD45RO-/RA+ phenotype and memory characteristics after initiation of HAART during acute primary HIV infection Blood, April 2, 2009; 113(14): 3209 - 3217. [Abstract] [Full Text] [PDF] J. G. Casado, O. DelaRosa, G. Pawelec, E. Peralbo, E. Duran, F. Barahona, R. Solana, and R. Tarazona Correlation of effector function with phenotype and cell division after in vitro differentiation of naive MART-1-specific CD8+ T cells Int. Immunol., January 1, 2009; 21(1): 53 - 62. [Abstract] [Full Text] [PDF] E. C. P. Waller, N. McKinney, R. Hicks, A. J. Carmichael, J. G. P. Sissons, and M. R. Wills Differential costimulation through CD137 (4 1BB) restores proliferation of human virus-specific "effector memory" (CD28 CD45RAHI) CD8+ T cells Blood, December 15, 2007; 110(13): 4360 - 4366. [Abstract] [Full Text] [PDF]

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