Abstract
Membrane fractions from chick embryo cells manifesting viral interference mediated by interferon or poly(I)-poly(C) contain high levels of an alkaline ribonuclease. Enhanced RNase activity is not observed when inhibitors of cell protein or RNA synthesis are present during interferon treatment, or when heterologous interferon is used. The RNase associated with comparable membrane fractions from cells treated with mock-interferon is about 1/10 as active, and shows qualitative differences. In principle, divergent views of interferon action may be reconciled to a common mode of action by postulating that viral interference results from a newly induced or activated RNase of cellular origin and proper specificity that acts to reduce the accumulation and functional capacity of newly synthesized viral RNAs, particularly mRNA. Previous data in support of interferon's acting to inhibit virion-derived transcription in vivo are now interpreted as demonstrating enhanced degradation of viral transcripts (mRNA).
MeSH Terms
Animals
Cell Membrane/enzymology
Cells, Cultured
Chick Embryo
Enzyme Activation/drug effects
Enzyme Induction/drug effects
Interferons/pharmacology
Poly I-C/pharmacology
Protein Biosynthesis/drug effects
RNA, Messenger/biosynthesis
RNA, Viral/biosynthesis
Ribonucleases/metabolism
Transcription, Genetic/drug effects
Vesicular stomatitis Indiana virus/drug effects
Viral Interference/drug effects
Chemicals
RNA, Messenger
RNA, Viral
Interferons
Ribonucleases
Poly I-C
Authors & Affiliations
3 authors, click to expand affiliations / ORCID
Marcus P I
Terry T M
Levine S
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