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© Charles DAUGUET, Institut Pasteur
HIV particles
Publication : The Journal of clinical investigation

Chronic T cell receptor stimulation unmasks NK receptor signaling in peripheral T cell lymphomas via epigenetic reprogramming.

Scientific Fields
Diseases
Organisms
Applications
Technique

Published in The Journal of clinical investigation - 01 Jul 2021

Carras S, Chartoire D, Mareschal S, Heiblig M, Marçais A, Robinot R, Urb M, Pommier RM, Julia E, Chebel A, Verney A, Bertheau C, Bardel E, Fezelot C, Courtois L, Lours C, Bouska A, Sharma S, Lefebvre C, Rouault JP, Sibon D, Ferrari A, Iqbal J, de Leval L, Gaulard P, Traverse-Glehen A, Sujobert P, Blery M, Salles G, Walzer T, Bachy E, Genestier L,

Link to Pubmed [PMID] – 34043588

Link to DOI – 10.1172/JCI139675139675

J Clin Invest 2021 07; 131(13):

Peripheral T cell lymphomas (PTCLs) represent a significant unmet medical need with dismal clinical outcomes. The T cell receptor (TCR) is emerging as a key driver of T lymphocyte transformation. However, the role of chronic TCR activation in lymphomagenesis and in lymphoma cell survival is still poorly understood. Using a mouse model, we report that chronic TCR stimulation drove T cell lymphomagenesis, whereas TCR signaling did not contribute to PTCL survival. The combination of kinome, transcriptome, and epigenome analyses of mouse PTCLs revealed a NK cell-like reprogramming of PTCL cells with expression of NK receptors (NKRs) and downstream signaling molecules such as Tyrobp and SYK. Activating NKRs were functional in PTCLs and dependent on SYK activity. In vivo blockade of NKR signaling prolonged mouse survival, demonstrating the addiction of PTCLs to NKRs and downstream SYK/mTOR activity for their survival. We studied a large collection of human primary samples and identified several PTCLs recapitulating the phenotype described in this model by their expression of SYK and the NKR, suggesting a similar mechanism of lymphomagenesis and establishing a rationale for clinical studies targeting such molecules.

https://pubmed.ncbi.nlm.nih.gov/34043588