Oncorna-viral information in human glioblastoma
Tóm tắt
Two of the main biochemical features characteristic for oncogenic RNA (oncorna) viruses have been detected in human glioblastoma. In all tumors tested so far a RNA instructed DNA polymerase (“reverse transcriptase”) activity was present which exhibited the criteria specific for oncorna viruses. It was stimulable by the synthetic polynucleotide poly-rA: oligo-dT, it was almost insensitive to actinomycin D but very sensitive to ethidiumbromide. Using the simultaneous detection test, a high molecular weight RNA species was found in the subcellular fraction with the highest reverse transcriptase activity. As revealed by electron microscopy, this subcellular fraction contains particles of a morphology similar to oncogenic RNA viruses of the C-type.