Determination of p53 mutations, EGFR overexpression, and loss of p16 expression in pediatric glioblastomas
Details
Serval ID
serval:BIB_753FFB896E64
Type
Article: article from journal or magazin.
Collection
Publications
Institution
Title
Determination of p53 mutations, EGFR overexpression, and loss of p16 expression in pediatric glioblastomas
Journal
Journal of Neuropathology and Experimental Neurology
ISSN
0022-3069 (Print)
Publication state
Published
Issued date
07/1997
Volume
56
Number
7
Pages
782-9
Notes
Journal Article
Research Support, Non-U.S. Gov't --- Old month value: Jul
Research Support, Non-U.S. Gov't --- Old month value: Jul
Abstract
Glioblastoma multiforme is a rare neoplasm in children and is often located infratentorially, particularly in the brainstem: Pediatric glioblastomas arise frequently (here 60%) outside the cerebral hemispheres. We investigated 20 pediatric glioblastomas for mutational inactivation of the p53 tumor suppressor gene, loss of p16 protein expression and overexpression of the epidermal growth factor receptor (EGFR). Mutations in the p53 gene were identified in 5/20 (25%) glioblastomas, 4 of which occurred in primary glioblastomas with a clinical history of less than 4 months and neither clinical nor histologic evidence of a less malignant precursor lesion. Loss of p16 expression was detected in 11/18 (61%) glioblastomas. Overexpression of the EGFR was infrequent (2/19, 11%) and included 1 tumor with a p53 mutation. Of 4 secondary glioblastomas that progressed from histologically diagnosed lower grade tumors, one contained a p53 mutation. Our results are at variance with similar studies in adult patients in which primary and secondary glioblastomas are characterized by EGFR overexpression and p53 mutations, respectively, suggesting that the evolution of pediatric glioblastomas follows different genetic pathways.
Keywords
Adolescent
Brain Neoplasms/*genetics
Carrier Proteins/*genetics
Child
Child, Preschool
Cyclin-Dependent Kinase Inhibitor p16
Female
Gene Expression/*genetics
Genes, Tumor Suppressor/*genetics
Genes, p53/*genetics
Glioblastoma/*genetics
Humans
Immunohistochemistry
Infant
Male
Receptor, Epidermal Growth Factor/*genetics
Pubmed
Web of science
Create date
25/01/2008 14:05
Last modification date
20/08/2019 15:32