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  • Title: Abortive and productive infections of human mononuclear phagocytes by type I herpes simplex virus.
    Author: Daniels CA, Kleinerman ES, Snyderman R.
    Journal: Am J Pathol; 1978 Apr; 91(1):119-36. PubMed ID: 206146.
    Abstract:
    The ability of Type I herpes simplex (HSV) to replicate in normal human monouclear phagocytes was investigated. Mononuclear leukocytes were obtained from the peripheral blood of patients by Ficoll-Hypaque gradient centrifugation, and the monocytes were isolated by allowing the cells to adhere to tissue culture dishes. The monocytes (10(5.0) cells) were infected (10(7.0) PFU HSV) either immediately after isolation or were cultured in vitro for varying numbers of days and were then infected. Inoculation of freshly isolated monocytes resulted primarily in an abortive infection. HSV antigens were produced by the cells, as determined by a indirect fluorescent antibody technique, and empty herpes capsid structures were detected by electron microscopy of the inoculated monocytes; however, no increase in virus titer was noted in the cultures. Inoculation of viable cells that had been maintained for 7 days in culture resulted in a productive infection. An increase in titer was noted 24 hours after inoculation, and normal virus maturation was documented by ultrastructural study of the infected cells. The experiments show that the interaction of HSV with human mononuclear phagocytes is complex, and the data suggest that whether or not the cell replicates infectious virus may depend on the functional activity of the cell.
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