Expression of platelet-derived growth factors, transforming growth factors, and the ros gene in a variety of primary human brain tumors.
Ribonucleic acid was isolated from a wide spectrum of central nervous system tumors to examine the expression of platelet-derived growth factors (PDGF) A and B, tumor growth factors (TGF-beta) 1 and 2, and ros messenger ribonucleic acid. Eight glioblastoma cell lines were examined as well as cell cultures from 22 tumor explants. The explants included 6 glioblastomas, 4 anaplastic astrocytomas, 5 astrocytomas, 3 ependymal tumors, 2 meningiomas, 1 medulloblastoma. and 1 ganglioglioma. For comparison, 2 nontumor glial cell cultures were included. The PDGF B-chain was expressed in 5 of 8 glioblastoma cell lines, 2 of 6 glioblastomas, and in 3 of 4 anaplastic astrocytoma explants. There was no PDGF B expression in 4 astrocytomas, 3 ependymomas of varying malignancy, in the remainder of the tumors, or in the nontumor glial cells. The PDGF A-chain was expressed in all of the tumors, with the exception of the malignant ependymoma and in both nontumor glial cell cultures. TGF-beta 1 was expressed in all of the tumors and in nontumor glial cells. The expression of TGF-beta 2 was expressed in many of the benign and malignant tumors and also in both nontumor glial cell cultures. The ros messenger ribonucleic acid was expressed in 1 of 5 glioblastoma cell lines and in 2 of 6 glioblastoma cell explants, but in none of the other tumors or in the nontumor glial cells.(ABSTRACT TRUNCATED AT 250 WORDS)
Mapstone
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Division of Neurosurgery, Case Western Reserve University School of Medicine, Cleveland, Ohio.
McMichael
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Goldthwait
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D001932:Brain Neoplasms / Q000235:genetics / Q000378:metabolism*; D016228:Endothelial Growth Factors / Q000378:metabolism*; D015972:Gene Expression Regulation, Neoplastic / Q000502:physiology; D006801:Humans; D009693:Nucleic Acid Hybridization; D010982:Platelet-Derived Growth Factor / Q000378:metabolism; D011505:Protein-Tyrosine Kinases / Q000378:metabolism*; D011518:Proto-Oncogene Proteins / Q000378:metabolism*; D012333:RNA, Messenger / Q000032:analysis; D012334:RNA, Neoplasm / Q000032:analysis*; D020794:Receptor Protein-Tyrosine Kinases; D016211:Transforming Growth Factor alpha / Q000378:metabolism; D016212:Transforming Growth Factor beta / Q000378:metabolism; D014407:Tumor Cells, Cultured
D016228:Endothelial Growth Factors; D010982:Platelet-Derived Growth Factor; D011518:Proto-Oncogene Proteins; D012333:RNA, Messenger; D012334:RNA, Neoplasm; D016211:Transforming Growth Factor alpha; D016212:Transforming Growth Factor beta; D011505:Protein-Tyrosine Kinases; C062333:ROS1 protein, human; D020794:Receptor Protein-Tyrosine Kinases