A signaling cascade including ARID1A, GADD45B and DUSP1 induces apoptosis and affects the cell cycle of germ cell cancers after romidepsin treatment.
Oncotarget
; 7(46): 74931-74946, 2016 Nov 15.
Article
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| MEDLINE
| ID: mdl-27572311
ABSTRACT
In Western countries, the incidence of testicular germ cell cancers (GCC) is steadily rising over the last decades. Mostly, men between 20 and 40 years of age are affected. In general, patients suffering from GCCs are treated by orchiectomy and radio- or chemotherapy. Due to resistance mechanisms, intolerance to the therapy or denial of chemo- / radiotherapy by the patients, GCCs are still a lethal threat, highlighting the need for alternative treatment strategies.In this study, we revealed that germ cell cancer cell lines are highly sensitive to the histone deacetylase inhibitor romidepsin in vitro and in vivo, highlighting romidepsin as a potential therapeutic option for GCC patients.Romidepsin-mediated inhibition of histone deacetylases led to disturbances of the chromatin landscape. This resulted in locus-specific histone-hyper- or hypoacetylation. We found that hypoacetylation at the ARID1A promotor caused repression of the SWI/SNF-complex member ARID1A. In consequence, this resulted in upregulation of the stress-sensors and apoptosis-regulators GADD45B, DUSP1 and CDKN1A. RNAi-driven knock down of ARID1A mimicked in parts the effects of romidepsin, while CRISPR/Cas9-mediated deletion of GADD45B attenuated the romidepsin-provoked induction of apoptosis and cell cycle alterations.We propose a signaling cascade involving ARID1A, GADD45B and DUSP1 as mediators of the romidepsin effects in GCC cells.
Palabras clave
Texto completo:
1
Bases de datos:
MEDLINE
Asunto principal:
Factores de Transcripción
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Proteínas Nucleares
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Transducción de Señal
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Antígenos de Diferenciación
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Ciclo Celular
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Apoptosis
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Neoplasias de Células Germinales y Embrionarias
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Fosfatasa 1 de Especificidad Dual
Tipo de estudio:
Prognostic_studies
Límite:
Humans
Idioma:
En
Revista:
Oncotarget
Año:
2016
Tipo del documento:
Article
País de afiliación:
Alemania