RCC2 promotes proliferation and radio-resistance in glioblastoma via activating transcription of DNMT1.
Biochem Biophys Res Commun
; 516(3): 999-1006, 2019 08 27.
Article
en En
| MEDLINE
| ID: mdl-31277942
ABSTRACT
Regulator of chromosome condensation 2 (RCC2) is a regulator of cell-cycle progression linked in multiple cancers to pro-tumorigenic phenomena including promotion of tumor growth, tumor metastases and poorer patient prognoses. However, the role of RCC2 in GBM remains under-investigated. Here, we sought to determine the relevance of RCC2 in GBM, as well as its roles in GBM development, progression and prognosis. Initial clinical evaluation determined significant RCC2 enrichment in GBM when compared to normal brain tissue, and elevated expression was closely associated with a poorer prognosis in glioma patients. Via shRNA inhibition, we determined that RCC2 is essential to tumor proliferation and tumorigenicity in vitro and in vivo. Additionally, RCC2 was determined to promote radioresistance of GBM tumor cells. Investigation of the underlying mechanisms implicated DNA mismatch repair, JAK-STAT pathway and activated transcription of DNA methyltransferase 1 (DNMT1). For validation, pharmacologic inhibition via administration of a DNMT1 inhibitor demonstrated attenuated GBM tumor growth both in vitro and in vivo. Collectively, this study determined a novel therapeutic target for GBM in the form of RCC2, which plays a pivotal role in GBM proliferation and radio-resistance via regulation of DNMT1 expression in a p-STAT3 dependent manner.
Palabras clave
Texto completo:
1
Colección:
01-internacional
Base de datos:
MEDLINE
Asunto principal:
Tolerancia a Radiación
/
Neoplasias Encefálicas
/
Proteínas Cromosómicas no Histona
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Regulación Neoplásica de la Expresión Génica
/
Glioblastoma
/
Factores de Intercambio de Guanina Nucleótido
/
ADN (Citosina-5-)-Metiltransferasa 1
Tipo de estudio:
Prognostic_studies
Idioma:
En
Revista:
Biochem Biophys Res Commun
Año:
2019
Tipo del documento:
Article
País de afiliación:
China