Expresión de Oncogenes y Oncosupresores en Meningiomas / Oncogenes and Tumor Suppressor Genes Expression
MAPFRE med
; MAPFRE med;18(4): 227-233, oct. - dic. 2007. ilus, tab
Article
in Es
| IBECS
| ID: ibc-67861
Responsible library:
ES15.1
Localization: ES15.1 - BNCS
Los meningiomas son tumores compuestos por células neoplásicas de la capa aracnoide y constituyen aproximadamente el 20% de todos los tumores intracraneales primarios. Hemos estudiado en una serie de meningiomas los niveles de expresión de 96 genes asociados con vías biológicas específicas relacionadas con cáncer. Para ello hemos usado membranas de microarray de expresión validadas por PCR cuantitativa. El estudio se completó con la búsqueda de la pérdida del gen NF2, principal candidato en la génesis de meningiomas, por medio de una amplificación múltipledependiente de ligasa (MLPA). El 78% de las muestras presentó deleción de un alelo del gen NF2. No se encontró ninguna relación significativa entre genes específicos y la pérdida de NF2 encontradas por MLPA. El análisis de expresión por microarray identificó 4 genes con expresión significativamente menor (BAD, BAX, FOS y TNFRSF25) y uno con expresión significativamente mayor (ITGAV) en las muestras de meningioma comparado con las correspondientes expresiones en los controles de meninge no tumoral. La expresión incrementada del gen ITGAV ha sido ya descrita en meningiomas. Por otro lado, la expresión significativamente menor de los genes BAD, BAX, FOS y TNFRSF25, es descrita en este trabajo por primera vez para este tipo tumoral. Estudios específicos para cada gen o sus interacciones aportarán mayor conocimiento sobre los procesos de transformación neoplásica y progresión tumoral en meningiomas
Meningiomas are tumors arising from aracnoid layer cellsand make up 20% of all intracranial tumours. We havestudied in a series of meningiomas the expression levelsof 96 genes associated with specific biological cancer related pathways. We have used expression microarrays validated by quantitative PCR. The study was completed with the search for losses in the NF2 gene, main candidate in the genesis of meningiomas, using multiplex ligase-dependent polymerase amplification (MLPA). 78% of the samples showed deletion for one copy of the NF2 gene. We have not found significant relation between specific genes and the loss of NF2 found by MLPA. The expression analysis by microarray identified 4 genes with significant decreased expression (BAD, BAX, FOS and TNFRSF25) and one with significant increased expression (ITGAV) in the samples of meningioma compared with the corresponding expressions in the controls from non-tumoral cerebral meninges. Increased expression of ITGAV gene has been already described in meningiomas. On the other hand, the significant decreased expression of BAD, BAX, FOS and TNFRSF25 is described in this work for the first time in meningiomas. Specific studies for each gene or its interactions will contribute to a better understanding on the processes of neoplastic transformation and progression in meningiomas
Meningiomas are tumors arising from aracnoid layer cellsand make up 20% of all intracranial tumours. We havestudied in a series of meningiomas the expression levelsof 96 genes associated with specific biological cancer related pathways. We have used expression microarrays validated by quantitative PCR. The study was completed with the search for losses in the NF2 gene, main candidate in the genesis of meningiomas, using multiplex ligase-dependent polymerase amplification (MLPA). 78% of the samples showed deletion for one copy of the NF2 gene. We have not found significant relation between specific genes and the loss of NF2 found by MLPA. The expression analysis by microarray identified 4 genes with significant decreased expression (BAD, BAX, FOS and TNFRSF25) and one with significant increased expression (ITGAV) in the samples of meningioma compared with the corresponding expressions in the controls from non-tumoral cerebral meninges. Increased expression of ITGAV gene has been already described in meningiomas. On the other hand, the significant decreased expression of BAD, BAX, FOS and TNFRSF25 is described in this work for the first time in meningiomas. Specific studies for each gene or its interactions will contribute to a better understanding on the processes of neoplastic transformation and progression in meningiomas
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Collection:
06-national
/
ES
Database:
IBECS
Main subject:
Genes, Neurofibromatosis 2
/
Meningeal Neoplasms
/
Meningioma
Type of study:
Diagnostic_studies
/
Prognostic_studies
Limits:
Adult
/
Aged
/
Female
/
Humans
/
Male
Language:
Es
Journal:
MAPFRE med
Year:
2007
Document type:
Article