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Título: | PTPIP51, a positive modulator of the MAPK/Erk pathway, is upregulated in glioblastoma and interacts with 14-3-3ß and PTP1B in situ |
Fecha de publicación: | 2011 |
Editorial: | F. Hernández y J.F. Madrid. Murcia: Universidad de Murcia, Departamento de Biología Celular e Histología. |
ISSN: | 1699-5848 0213-3911 |
Materias relacionadas: | 616 - Patología. Medicina clínica. Oncología |
Palabras clave: | Glioblastoma PTPIP51 |
Resumen: | Glioblastoma multiforme (GBM) is the most common and most malignant primary brain tumour. Protein tyrosine phosphatase interacting protein 51 (PTPIP51) is an interaction partner of 14-3-3ß, which correlates with the grade of malignancy in gliomas. In this study PTPIP51 and its interacting partners 14-3-3ß, PTP1B, c-Src, Raf-1 as well as EGFR were investigated in human glioblastoma. Twenty glioblastoma samples were analyzed on transcriptional and translational level by immunohisto-chemistry, in situ hybridization and RT-PCR. To compare PTPIP51 expression in gliomas of different malignancies, quantitative RT-PCR for grade II astrocytoma and GBM samples was employed. Additionally, we analyzed the correlation between PTPIP51 and 14-3-3ß transcription, and checked for in situ interaction between PTPIP51 and 14-3-3ß and PTP1B, respectively. PTPIP51 and 14-3-3ß mRNA showed a tumour grade dependent upregulation in gliomas. Glioblastoma cells displayed a strong immunoreaction of PTPIP51, which co-localized with 14-3-3ß and PTP1B. The duolink proximity ligation assay corroborated a direct in situ interaction of PTPIP51 with both proteins, known to interact with PTPIP51 in vitro. The in vitro interacting partners Raf-1 and c-Src showed a partial co-localization. Besides, immune cells located in capillaries or infiltrating the tumour tissue and endothelial cells of pseudoglomerular vessels revealed a high PTPIP51 expression. The upregulation of PTPIP51 and its connection with the EGFR/MAPK pathway by 14-3-3ß via Raf-1 and by PTP1B via c-Src, argue for a functional role of PTPIP51 in the pathogenesis of human glioblastoma. |
Autor/es principal/es: | Petri, M.K. Stenzinger, A. Kuchelmeister, K. Nestler, U. Paradowska, A. Steger, K. Brobeil, A. Viard, M. Wimmer, M. |
Forma parte de: | Histology and histopathology, Vol. 26, nº12 (2011) |
URI: | http://hdl.handle.net/10201/49529 |
Tipo de documento: | info:eu-repo/semantics/article |
Número páginas / Extensión: | 13 |
Derechos: | info:eu-repo/semantics/openAccess |
Aparece en las colecciones: | Vol.26,nº12 (2011) |
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Fichero | Descripción | Tamaño | Formato | |
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Petri-26-1531-1543-2011.pdf | 7,24 MB | Adobe PDF | Visualizar/Abrir |
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