In T lymphocytes, the Wiskott–Aldrich Syndrome protein (WASP) and WASP-interacting-protein (WIP) regulate T cell antigen receptor (TCR) signaling, but their role in lymphoma is largely unknown. Here we show that the expression of WASP and WIP is frequently low or absent in anaplastic large cell lymphoma (ALCL) compared to other T cell lymphomas. In anaplastic lymphoma kinase–positive (ALK+) ALCL, WASP and WIP expression is regulated by ALK oncogenic activity via its downstream mediators STAT3 and C/EBP-β. ALK+ lymphomas were accelerated in WASP- and WIP-deficient mice. In the absence of WASP, active GTP-bound CDC42 was increased and the genetic deletion of one CDC42 allele was sufficient to impair lymphoma growth. WASP-deficient lymphoma showed increased mitogen-activated protein kinase (MAPK) pathway activation that could be exploited as a therapeutic vulnerability. Our findings demonstrate that WASP and WIP are tumor suppressors in T cell lymphoma and suggest that MAP-kinase kinase (MEK) inhibitors combined with ALK inhibitors could achieve a more potent therapeutic effect in ALK+ ALCL

Menotti, M., Ambrogio, C., Cheong, T., Pighi, C., Mota, I., Cassel, S., et al. (2019). Wiskott–Aldrich syndrome protein (WASP) is a tumor suppressor in T cell lymphoma. NATURE MEDICINE, 25(1), 130-140 [10.1038/s41591-018-0262-9].

Wiskott–Aldrich syndrome protein (WASP) is a tumor suppressor in T cell lymphoma

Sharma, Geeta Geeta;Mastini, Cristina;Mologni, Luca;Gambacorti-Passerini, Carlo;
2019

Abstract

In T lymphocytes, the Wiskott–Aldrich Syndrome protein (WASP) and WASP-interacting-protein (WIP) regulate T cell antigen receptor (TCR) signaling, but their role in lymphoma is largely unknown. Here we show that the expression of WASP and WIP is frequently low or absent in anaplastic large cell lymphoma (ALCL) compared to other T cell lymphomas. In anaplastic lymphoma kinase–positive (ALK+) ALCL, WASP and WIP expression is regulated by ALK oncogenic activity via its downstream mediators STAT3 and C/EBP-β. ALK+ lymphomas were accelerated in WASP- and WIP-deficient mice. In the absence of WASP, active GTP-bound CDC42 was increased and the genetic deletion of one CDC42 allele was sufficient to impair lymphoma growth. WASP-deficient lymphoma showed increased mitogen-activated protein kinase (MAPK) pathway activation that could be exploited as a therapeutic vulnerability. Our findings demonstrate that WASP and WIP are tumor suppressors in T cell lymphoma and suggest that MAP-kinase kinase (MEK) inhibitors combined with ALK inhibitors could achieve a more potent therapeutic effect in ALK+ ALCL
Articolo in rivista - Articolo scientifico
Biochemistry, Genetics and Molecular Biology (all)
English
3-dic-2018
2019
25
1
130
140
reserved
Menotti, M., Ambrogio, C., Cheong, T., Pighi, C., Mota, I., Cassel, S., et al. (2019). Wiskott–Aldrich syndrome protein (WASP) is a tumor suppressor in T cell lymphoma. NATURE MEDICINE, 25(1), 130-140 [10.1038/s41591-018-0262-9].
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/10281/213653
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