Increased sensitivity of human lymphoid lines to natural killer cells after induction of the Epstein-Barr viral cycle by superinfection or sodium butyrate

B. Blazar, M. Patarroyo, E. Klein, G. Klein

Research output: Contribution to journalArticlepeer-review

68 Scopus citations

Abstract

Superinfection of latently Epstein-Barr virus (EBV)-carrying Raji cells with the P3HR-1 substrain of EBV, known to induce the entry of a substantial fraction of the cells into an abortively lytic cycle, increased the susceptibility of the cells to the natural killer (NK) effect of human blood lymphocytes. Reciprocal cold-target competition tests with known NK-cell-sensitive and -resistant lymphoid cell lines showed that the increased susceptibility is a result of the appearance of an NK-sensitive target, rather than to a general increase in membrane fragility. Lymphocytes of EBV-seropositive and -negative donors were equally effective killers against P3HR-1 virus-superinfected targets. EBV-induced NK sensitivity increased with time. It was a result of some event associated with the intracellular viral cycle, and not to the adherence of viral particles to the cell surface. Induction of EBV-carrying P3HR-1 cells to entry into the viral cycle with n-butyrate also increased their NK sensitivity. A transforming, noncytopathic prototype strain of EBV, B95-8, failed to increase the susceptibility of the Raji cells to NK-lysis, although it had some effect on the Daudi line. Because NK cells can kill virus-producing cells at an early stage of the cycle, before the virus particles are assembled, they may restrict, in vivo, the spread of the virus from latently infected cells.

Original languageEnglish
Pages (from-to)614-627
Number of pages14
JournalJournal of Experimental Medicine
Volume151
Issue number3
DOIs
StatePublished - 1980
Externally publishedYes

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