Negative feedback regulation of MAPK signaling is an important driver of chronic lymphocytic leukemia progression
Copyright © 2023 The Author(s). Published by Elsevier Inc. All rights reserved..
Despite available targeted treatments for the disease, drug-resistant chronic lymphocytic leukemia (CLL) poses a clinical challenge. The objective of this study is to examine whether the dual-specific phosphatases DUSP1 and DUSP6 are required to negatively regulate mitogen-activated protein kinases (MAPKs) and thus counterbalance excessive MAPK activity. We show that high expression of DUSP6 in CLL correlates with poor clinical prognosis. Importantly, genetic deletion of the inhibitory phosphatase DUSP1 or DUSP6 and blocking DUSP1/6 function using a small-molecule inhibitor reduces CLL cell survival in vitro and in vivo. Using global phospho-proteome approaches, we observe acute activation of MAPK signaling by DUSP1/6 inhibition. This promotes accumulation of mitochondrial reactive oxygen species and, thereby, DNA damage and apoptotic cell death in CLL cells. Finally, we observe that DUSP1/6 inhibition is particularly effective against treatment-resistant CLL and therefore suggest transient DUSP1/6 inhibition as a promising treatment concept to eliminate drug-resistant CLL cells.
| Medienart: |
E-Artikel |
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| Erscheinungsjahr: |
2023 |
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| Erschienen: |
2023 |
| Enthalten in: |
Zur Gesamtaufnahme - volume:42 |
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| Enthalten in: |
Cell reports - 42(2023), 10 vom: 31. Okt., Seite 113017 |
| Sprache: |
Englisch |
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| Beteiligte Personen: |
Ecker, Veronika [VerfasserIn] |
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| Links: |
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| Themen: |
Apoptosis |
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| Anmerkungen: |
Date Completed 06.11.2023 Date Revised 14.02.2024 published: Print-Electronic Citation Status MEDLINE |
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| doi: |
10.1016/j.celrep.2023.113017 |
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| funding: |
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| Förderinstitution / Projekttitel: |
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| PPN (Katalog-ID): |
NLM362862826 |
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| 520 | |a Copyright © 2023 The Author(s). Published by Elsevier Inc. All rights reserved. | ||
| 520 | |a Despite available targeted treatments for the disease, drug-resistant chronic lymphocytic leukemia (CLL) poses a clinical challenge. The objective of this study is to examine whether the dual-specific phosphatases DUSP1 and DUSP6 are required to negatively regulate mitogen-activated protein kinases (MAPKs) and thus counterbalance excessive MAPK activity. We show that high expression of DUSP6 in CLL correlates with poor clinical prognosis. Importantly, genetic deletion of the inhibitory phosphatase DUSP1 or DUSP6 and blocking DUSP1/6 function using a small-molecule inhibitor reduces CLL cell survival in vitro and in vivo. Using global phospho-proteome approaches, we observe acute activation of MAPK signaling by DUSP1/6 inhibition. This promotes accumulation of mitochondrial reactive oxygen species and, thereby, DNA damage and apoptotic cell death in CLL cells. Finally, we observe that DUSP1/6 inhibition is particularly effective against treatment-resistant CLL and therefore suggest transient DUSP1/6 inhibition as a promising treatment concept to eliminate drug-resistant CLL cells | ||
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| 650 | 4 | |a CLL | |
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| 700 | 1 | |a Brandmeier, Lisa |e verfasserin |4 aut | |
| 700 | 1 | |a Stumpf, Martina |e verfasserin |4 aut | |
| 700 | 1 | |a Giansanti, Piero |e verfasserin |4 aut | |
| 700 | 1 | |a Moreira, Aida Varela |e verfasserin |4 aut | |
| 700 | 1 | |a Pfeuffer, Lisa |e verfasserin |4 aut | |
| 700 | 1 | |a Fens, Marcel H A M |e verfasserin |4 aut | |
| 700 | 1 | |a Lu, Junyan |e verfasserin |4 aut | |
| 700 | 1 | |a Kuster, Bernhard |e verfasserin |4 aut | |
| 700 | 1 | |a Engleitner, Thomas |e verfasserin |4 aut | |
| 700 | 1 | |a Heidegger, Simon |e verfasserin |4 aut | |
| 700 | 1 | |a Rad, Roland |e verfasserin |4 aut | |
| 700 | 1 | |a Ringshausen, Ingo |e verfasserin |4 aut | |
| 700 | 1 | |a Zenz, Thorsten |e verfasserin |4 aut | |
| 700 | 1 | |a Wendtner, Clemens-Martin |e verfasserin |4 aut | |
| 700 | 1 | |a Müschen, Markus |e verfasserin |4 aut | |
| 700 | 1 | |a Jellusova, Julia |e verfasserin |4 aut | |
| 700 | 1 | |a Ruland, Jürgen |e verfasserin |4 aut | |
| 700 | 1 | |a Buchner, Maike |e verfasserin |4 aut | |
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