Regulation of CD45 isoforms during human effector and memory CD8 T cell differentiation: Implications for T cell nomenclature.

ABSTRACT: This study examines the expression of CD45 isoforms on human yellow fever virus vaccine (YFV-17D) specific CD8 T cells longitudinally after vaccination. As expected, effector CD8 T cells at day 14 express CD45RO but within 4 to 6 wk these virus-specific CD8 T cells become CD45RA positive and remain CD45RA for >10 y. The journey for these YFV-specific CD8 T cells goes from naive (CD45RA+ CCR7+) to effector/effector memory (CD45RO+ CCR7-) to Temra (CD45RA+ CCR7-) to stem-cell memory (CD45RA+ CCR7+). These YFV-specific CD8 T cells rarely acquire the canonical Tcm phenotype (CD45RO+ CCR7+). This CD45RO to RA switch coincides with clearance of YFV, so we hypothesized that antigen may be playing a role in regulating CD45 expression. We addressed this issue by ex vivo analysis and provide evidenc

SUBMITTER: McGuire DJ 

PROVIDER: S-EPMC12358852 | biostudies-literature | 2025 Aug

REPOSITORIES: biostudies-literature