Center for Molecular Spectroscopy and Dynamics

   IBS Center for Molecular Spectroscopy and Dynamics

■        SPEAKER
Prof. Eun Young Choi (Seoul National University College of Medicine)

■        TITLE
Memory programming in CD8þ T-cell differentiation is intrinsic and is not determined by CD4 help

■    ABSTRACT
CD8 T cells activated without CD4 T-cell help are impaired in memory expansion. To understand the underlying cellular mechanism, here we track the dynamics of helper-deficient CD8 T-cell response to a minor histocompatibility antigen by phenotypic and in vivo imaging analyses. Helper-deficient CD8 T cells show reduced burst expansion, rapid peripheral egress, delayed antigen clearance and continuous activation, and are eventually exhausted. Contrary to the general consensus that CD4 help encodes memory programmes in CD8 Tcells and helper-deficient CD8 Tcells are abortive, these cells can differentiate into effectors and memory precursors. Importantly, accelerating antigen clearance or simply increasing the burst effector size enables generation of memory cells by CD8 T cells, regardless of CD4 help. These results suggest that the memory program is CD8þ T-cell-intrinsic, and provide insight into the role of CD4 help in CD8 T-cell responses.

■    DATE AND VENUE
 October 10, 2018 (Wednesday, 5:00 - 6:00 pm)  

Seminar Room A 116, KU R&D Center

■        LANGUAGE
Korean

■        INVITED BY
Associate Director Wonshik Choi