Cutting edge: CCR7+ and CCR7- memory T cells do not differ in immediate effector cell function.
It has been proposed that expression of the chemokine receptor CCR7 represents a defining factor for nonpolarized central (CCR7(+)) and polarized effector memory (CCR7(-)) T cells. In this study, we have tested this hypothesis using in vivo-activated T cells from P14 and SMARTA TCR-transgenic (tg) mice specific for MHC class I- and II-restricted epitopes of the lymphocytic choriomeningitis virus (LCMV) glycoprotein. CCR7 cell surface expression on TCR-tg cells was monitored with a CC chemokine ligand 19-Ig fusion protein. CC chemokine ligand 19-Ig staining separated TCR-tg cells activated by LCMV infection into CCR7(-) and CCR7(+) effector/memory T cell populations. Nonetheless, both T cell populations isolated from spleen and liver produced identical amounts of IFN-gamma after short-term Ag stimulation. Furthermore, CCR7(+) and CCR7(-) CD8 TCR-tg cells from LCMV-infected mice exhibited similar lytic activity against LCMV peptide-coated target cells. These results question the proposed concept of differential effector cell function of CCR7(+) and CCR7(-) memory T cells.
Unsoeld
Heike
H
Department of Immunology, Institute for Medical Microbiology and Hygiene, University of Freiburg, Freiburg, Germany.
Krautwald
Stefan
S
Voehringer
David
D
Kunzendorf
Ulrich
U
Pircher
Hanspeter
H
D000595:Amino Acid Sequence; D000818:Animals; D000956:Antigens, Viral / Q000235:genetics / Q000276:immunology; D015496:CD4-Positive T-Lymphocytes / Q000276:immunology / Q000378:metabolism / Q000821:virology; D018414:CD8-Positive T-Lymphocytes / Q000276:immunology / Q000378:metabolism / Q000821:virology; D002462:Cell Membrane / Q000276:immunology / Q000378:metabolism; D016207:Cytokines / Q000096:biosynthesis; D003602:Cytotoxicity, Immunologic / Q000235:genetics; D018984:Epitopes, T-Lymphocyte / Q000235:genetics / Q000276:immunology; D006023:Glycoproteins / Q000235:genetics / Q000276:immunology; D007156:Immunologic Memory / Q000235:genetics; D007700:Kinetics; D008213:Lymphocyte Activation / Q000235:genetics; D008217:Lymphocytic choriomeningitis virus / Q000235:genetics / Q000276:immunology; D051379:Mice; D008810:Mice, Inbred C57BL; D018345:Mice, Knockout; D008822:Mice, Transgenic; D008969:Molecular Sequence Data; D010446:Peptide Fragments / Q000235:genetics / Q000276:immunology; D054400:Receptors, CCR7; D019707:Receptors, Chemokine / Q000096:biosynthesis* / Q000172:deficiency / Q000235:genetics; D016176:T-Lymphocyte Subsets / Q000276:immunology* / Q000378:metabolism / Q000821:virology; D014764:Viral Proteins / Q000235:genetics / Q000276:immunology
D000956:Antigens, Viral; C515371:Ccr7 protein, mouse; D016207:Cytokines; D018984:Epitopes, T-Lymphocyte; D006023:Glycoproteins; D010446:Peptide Fragments; D054400:Receptors, CCR7; D019707:Receptors, Chemokine; D014764:Viral Proteins; C094244:glycoprotein peptide 33-41, Lymphocytic choriomeningitis virus