TY - GEN AU - Fuse,Shinichiro AU - Tsai,Ching-Yi AU - Molloy,Michael J AU - Allie,S Rameeza AU - Zhang,Weijun AU - Yagita,Hideo AU - Usherwood,Edward J TI - Recall responses by helpless memory CD8+ T cells are restricted by the up-regulation of PD-1 SN - 1550-6606 PY - 2009///0414 KW - Adoptive Transfer KW - Animals KW - Antigens, Surface KW - immunology KW - Apoptosis Regulatory Proteins KW - CD4-Positive T-Lymphocytes KW - cytology KW - CD40 Antigens KW - CD8-Positive T-Lymphocytes KW - Cell Differentiation KW - Flow Cytometry KW - Immunologic Memory KW - Interleukin-2 KW - Lymphocyte Activation KW - Mice KW - Programmed Cell Death 1 Receptor KW - Signal Transduction KW - Up-Regulation KW - Vaccinia KW - Vaccinia virus N1 - Publication Type: Journal Article; Research Support, N.I.H., Extramural UR - https://doi.org/10.4049/jimmunol.0802041 ER -