Distribution of actin and myosin in a rat neuronal cell line infected with herpes simplex virus

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Abstract
The indirect immunofluorescence technique was used to study alterations in the distribution of actin and myosin filaments in a rat B 103 neuronal cell line infected with herpes simplex virus type 1 (HSV-1). In uninfected cells, actin filaments were arranged in parallel and ran lengthwise from one end of the cell to the other; although myosin filaments were closely associated with actin filaments, additional myosin formed a netlike distribution which did not stain for actin. In infected cells, actin filaments became more randomly aligned and were concentrated along with myosin in close association with rosette-like formations of nuclei in syncytial cells; structural organization of actin and myosin within these intensely staining areas was no longer evident. The possible role of contractile proteins (actin and myosin) in viral infections of neural tissue is raised.