DOCK8 deficiency impairs CD8 T cell survival and function in humans and mice
In humans, DOCK8 immunodeficiency syndrome is characterized by severe cutaneous viral infections. Thus, CD8 T cell function may be compromised in the absence of DOCK8. In this study, by analyzing mutant mice and humans, we demonstrate a critical, intrinsic role for DOCK8 in peripheral CD8 T cell survival and function. DOCK8 mutation selectively diminished the abundance of circulating naive CD8 T cells in both species, and in DOCK8-deficient humans, most CD8 T cells displayed an exhausted CD45RA(+)CCR7(-) phenotype. Analyses in mice revealed the CD8 T cell abnormalities to be cell autonomous and primarily postthymic. DOCK8 mutant naive CD8 T cells had a shorter lifespan and, upon encounter with antigen on dendritic cells, exhibited poor LFA-1 synaptic polarization and a delay in the first cell division. Although DOCK8 mutant T cells underwent near-normal primary clonal expansion after primary infection with recombinant influenza virus in vivo, they showed greatly reduced memory cell persistence and recall. These findings highlight a key role for DOCK8 in the survival and function of human and mouse CD8 T cells.
|ISBN||1540-9538 (Electronic) 0022-1007 (Linking)|
|Authors||Randall, K. L.; Chan, S. S.; Ma, C. S.; Fung, I.; Mei, Y.; Yabas, M.; Tan, A.; Arkwright, P. D.; Al Suwairi, W.; Lugo Reyes, S. O.; Yamazaki-Nakashimada, M. A.; de la Luz Garcia-Cruz, M.; Smart, J. M.; Picard, C.; Okada, S.; Jouanguy, E.; Casanova, J. L.; Lambe, T.; Cornall, R. J.; Russell, S.; Oliaro, J.; Tangye, S. G.; Bertram, E. M.; Goodnow, C. C.:|
|Publisher Name||J EXP MED|
|Published Date||2011-11-01 00:00:00|