Abstract
Expression of the c-sis oncogene, the gene encoding the B chain of platelet-derived growth factor (PDGF), may be related to initiation and/or progression of glial cell tumorigenesis by PDGF-mediated autocrine growth stimulation. As the mechanism for activation of expression of the c-sis gene in gliomas is not known, we searched for possible structural alterations of c-sis DNA in these tumors. Genomic Southern blots of DNA from 7 different cultured human glioblastoma cell lines and 15 different solid human brain tumors revealed no significant change in either the gross structure or the copy number of the c-sis gene in tumor cells vs. control cells. Activation of glioma c-sis gene expression is therefore not the result of a gross rearrangement or amplification of the c-sis gene. Expression of c-sis mRNA was detected in all of 12 different solid human brain tumors, 11 of which were of glial cell origin. However, in tissue adjacent to 5 different tumors, approximately the same level of c-sis mRNA was seen.
Original language | English (US) |
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Pages (from-to) | 345-356 |
Number of pages | 12 |
Journal | Journal of Neuro-Oncology |
Volume | 7 |
Issue number | 4 |
DOIs | |
State | Published - Dec 1989 |
Externally published | Yes |
Keywords
- c-sis
- glioma
- oncogene
ASJC Scopus subject areas
- Oncology
- Neurology
- Clinical Neurology
- Cancer Research