Towards a cellular definition of CD8+ T-cell memory: the role of CD4+ T-cell help in CD8+ T-cell responses.
Whereas the definition of B-cell memory is based on well-known cellular properties and differentiation steps, the process of T-cell memory generation was, until recently, less well understood. A series of recent reports, however, have drastically modified our notion of CD8(+) memory T cells. They show that, in addition to division, the generation of efficient memory cells requires a previously unknown differentiation process. As a whole, the generation of CD8(+) memory T cells appears to mimic the generation of memory B cells. Both processes depend on the help of CD4(+) T cells, they are irreversible, they have the same mechanism, and they occur progressively during the late expansion phase of the primary immune response.
Rocha
Benedita
B
Institut National de la Sante et de la Recherche Medicale, U591, Centre Hôspitalo-Universitaire Necker, 156 rue de Vaugirard, 75730, Paris Cedex 15, France.
Tanchot
Corinne
C
D000818:Animals; D000938:Antigen-Presenting Cells / Q000276:immunology*; D001402:B-Lymphocytes / Q000276:immunology*; D015496:CD4-Positive T-Lymphocytes / Q000276:immunology*; D018414:CD8-Positive T-Lymphocytes / Q000276:immunology*; D002454:Cell Differentiation / Q000276:immunology*; D002455:Cell Division / Q000276:immunology; D006801:Humans; D007156:Immunologic Memory / Q000276:immunology*; D008213:Lymphocyte Activation / Q000502:physiology; D051379:Mice