Autocrine growth regulation in neuroectodermal tumors as detected with oligodeoxynucleotide antisense molecules.
The cell lines of three neuroectodermal tumors, two glioblastomas (HTZ-146, HTZ-17) and one melanoma (HTZ-19) were established and screened for the expression of growth factors by northern blotting and immunochemical methods. All three tumors were positive for platelet-derived growth factor- (PDGF-) A-, -B-chain, and basic fibroblast growth factor (bFGF) messenger ribonucleic acids. Cultured cells as well as original tumor material were also positive for PDGF-AA-, PDGF-BB, and bFGF protein, as shown by immunochemistry. To investigate the possible pathophysiological role of PDGF and bFGF, antisense technology was employed with chemically modified nuclease-stable 14-mer phosphorothioate oligodeoxynucleotides. Proliferation of all three tumors was reduced to a different extent with antisense phosphorothioate oligodeoxynucleotides in vitro, targeted against PDGF-A-chain-, -B-chain-, and -bFGF-messenger ribonucleic acid. These data indicate autocrine stimulatory loops for PDGF and bFGF, which may be blocked, may have different relevance in neuroectodermal tumors in vitro, and may have conceivable future therapeutic implications.
Behl
C
C
Department of Neurology, University of Wuerzburg, Germany.
Winkler
J
J
Bogdahn
U
U
Meixensberger
J
J
Schligensiepen
K H
KH
Brysch
W
W
D001706:Biopsy; D001921:Brain / Q000473:pathology; D001932:Brain Neoplasms / Q000473:pathology* / Q000556:secondary*; D002455:Cell Division / Q000502:physiology*; D002460:Cell Line; D016222:Fibroblast Growth Factor 2 / Q000502:physiology; D005909:Glioblastoma / Q000473:pathology*; D006133:Growth Substances / Q000502:physiology*; D006801:Humans; D007124:Immunoenzyme Techniques; D008545:Melanoma / Q000473:pathology / Q000556:secondary*; D016376:Oligonucleotides, Antisense; D010982:Platelet-Derived Growth Factor / Q000502:physiology; D011518:Proto-Oncogene Proteins / Q000502:physiology; D020574:Proto-Oncogene Proteins c-sis; D014407:Tumor Cells, Cultured / Q000502:physiology*
D006133:Growth Substances; D016376:Oligonucleotides, Antisense; D010982:Platelet-Derived Growth Factor; D011518:Proto-Oncogene Proteins; D020574:Proto-Oncogene Proteins c-sis; C075278:platelet-derived growth factor A; D016222:Fibroblast Growth Factor 2