PLK1 stabilizes a MYC-dependent kinase network in aggressive B cell lymphomas.
J Clin Invest
; 128(12): 5517-5530, 2018 12 03.
Article
em En
| MEDLINE
| ID: mdl-30260324
ABSTRACT
Concordant activation of MYC and BCL-2 oncoproteins in double-hit lymphoma (DHL) results in aggressive disease that is refractory to treatment. By integrating activity-based proteomic profiling and drug screens, polo-like kinase-1 (PLK1) was identified as an essential regulator of the MYC-dependent kinome in DHL. Notably, PLK1 was expressed at high levels in DHL, correlated with MYC expression, and connoted poor outcome. Further, PLK1 signaling augmented MYC protein stability, and in turn, MYC directly induced PLK1 transcription, establishing a feed-forward MYC-PLK1 circuit in DHL. Finally, inhibition of PLK1 triggered degradation of MYC and of the antiapoptotic protein MCL-1, and PLK1 inhibitors showed synergy with BCL-2 antagonists in blocking DHL cell growth, survival, and tumorigenicity, supporting clinical targeting of PLK1 in DHL.
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Base de dados:
MEDLINE
Assunto principal:
Transdução de Sinais
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Proteínas Proto-Oncogênicas c-myc
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Linfoma Difuso de Grandes Células B
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Proteínas Proto-Oncogênicas
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Proteínas Serina-Treonina Quinases
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Proteínas de Ciclo Celular
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Proteólise
Idioma:
En
Ano de publicação:
2018
Tipo de documento:
Article