NewslettersImmune Regulation News PD-L1–PD-1 Interactions Limit Effector Regulatory T Cell Populations at Homeostasis and during Infection By lbeveridge - April 20, 2022 0 The authors found that regulatory T cell with an effector phenotype (eTreg) cell expression of PD-1 acted as a sensor to rapidly tune the pool of eTreg cells at homeostasis and during inflammatory processes. [Nature Immunology] Abstract