Abstract
T lymphoma cells may constitutively express PD-1 and PD-L1. The relative role of PD-1 and PD-L1 in T lymphoma is incompletely understood. We report here that PD-1+ PDL-1+ human T lymphoma cells exhibit constitutive hyperactivation of the TCR signaling and do not respond to PD-L1-mediated suppression in vitro. Knocking out PD-1 or PD-L1 has no effects on T lymphoma cell apoptosis and proliferation in vitro, but significantly increased tumor-bearing mouse survival. Our findings determine that the constitutively active TCR signaling pathway maintain T lymphoma cell growth in vitro and that both PD-1 and PD-L1 promote T lymphoma growth in vivo.
Original language | English (US) |
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Article number | 104397 |
Journal | Cellular Immunology |
Volume | 366 |
DOIs | |
State | Published - Aug 2021 |
Keywords
- PD-1
- PD-L1
- T cell receptor
- T lymphoma
ASJC Scopus subject areas
- Immunology