ALK(R1275Q) perturbs extracellular matrix, enhances cell invasion and leads to the development of neuroblastoma in cooperation with MYCN.
Oncogene
; 35(34): 4447-58, 2016 08 25.
Article
en En
| MEDLINE
| ID: mdl-26829053
Overexpression of MYCN is a hallmark of neuroblastoma (NB). ALK(R1275Q), an activating mutation of ALK (anaplastic lymphoma kinase), has been found in sporadic and familial NB patients. In this report, we demonstrated that ALK(R1275Q) knock-in, MYCN transgenic compound mice developed NB with complete penetrance. Transcriptome analysis revealed that ALK(R1275Q) globally downregulated the expression of extracellular matrix (ECM)- and basement membrane (BM)-associated genes in both primary neuronal cells and NB tumors. Accordingly, ALK(R1275Q)/MYCN tumors exhibited reduced expression of ECM/BM-related proteins as compared with MYCN tumors. In addition, on MYCN transduction, ALK(R1275Q)-expressing neuronal cells exhibited increased migratory and invasive activities. Consistently, enhanced invasion and metastasis were demonstrated in ALK(R1275Q)/MYCN mice. These results collectively indicate that ALK(R1275Q) confers a malignant potential on neuronal cells that overexpress MYCN by impairing normal ECM/BM integrity and enhancing tumor growth and dissemination. Moreover, we found that crizotinib, an ALK inhibitor, almost completely inhibited the growth of ALK(R1275Q)/MYCN tumors in an allograft model. Our findings provided insights into the cooperative mechanism of the mutated ALK and overexpressed MYCN in the pathogenesis of NB and demonstrated the effectiveness of crizotinib on ALK(R1275Q)-positive tumors.
Texto completo:
1
Colección:
01-internacional
Base de datos:
MEDLINE
Asunto principal:
Proteínas Tirosina Quinasas Receptoras
/
Matriz Extracelular
/
Proteína Proto-Oncogénica N-Myc
/
Mutación
/
Neuroblastoma
Tipo de estudio:
Prognostic_studies
Límite:
Animals
Idioma:
En
Revista:
Oncogene
Asunto de la revista:
BIOLOGIA MOLECULAR
/
NEOPLASIAS
Año:
2016
Tipo del documento:
Article
País de afiliación:
Japón
Pais de publicación:
Reino Unido