Abstract:
:CD70 and CD27 are costimulatory molecules that provide essential signals for the expansion and differentiation of CD8(+) T cells. Here, we show that CD27-driven costimulation lowered the threshold of T cell receptor activation on CD8(+) T cells and enabled responses against low-affinity antigens. Using influenza infection to study in vivo consequences, we found that CD27-driven costimulation promoted a CD8(+) T cell response of overall low affinity. These qualitative effects of CD27 on T cell responses were maintained into the memory phase. On a clonal level, CD27-driven costimulation established a higher degree of variety in memory CD8(+) T cells. The benefit became apparent when mice were reinfected, given that CD27 improved CD8(+) T cell responses against reinfection with viral variants, but not with identical virus. We propose that CD27-driven costimulation is a strategy to generate memory clones that have potential reactivity to a wide array of mutable pathogens.
journal_name
Immunityjournal_title
Immunityauthors
van Gisbergen KP,Klarenbeek PL,Kragten NA,Unger PP,Nieuwenhuis MB,Wensveen FM,ten Brinke A,Tak PP,Eldering E,Nolte MA,van Lier RAdoi
10.1016/j.immuni.2011.04.020subject
Has Abstractpub_date
2011-07-22 00:00:00pages
97-108issue
1eissn
1074-7613issn
1097-4180pii
S1074-7613(11)00266-4journal_volume
35pub_type
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