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Inhibition of the Replication of Parvovirus X14 by 5-Iodo-2'-deoxyuridine Pre-treatment of Cell Cultures

Heather D. Mayor

Department of Microbiology and Immunology, Baylor College of Medicine, Houston, Texas 77030, U.S.A.

Pre-treatment of rat embryo cell cultures with 5-iodo-2'-deoxyuridine (IdUrd) inhibits the replication of parvovirus X14. Reduced yields of haemagglutinating and infectious particles were observed. Adsorption of virus to cells was not affected, but both virus protein and DNA synthesis were inhibited. Fewer cells were capable of supporting protein or antigen synthesis as determined by immunofluorescence. Virus-specific DNA was detected in IdUrd pre-treated cells, but the amount synthesized was considerably less than that from control cultures. Cellular DNA synthesis was also inhibited in IdUrd pre-treated cells. Therefore, the replication of parvoviruses appears dependent upon host cell factors involved in cellular DNA synthesis.

^* Present Address: Department of Biological Sciences, University of Texas at El Paso, El Paso, Texas, U.S.A.

To whom reprint requests should be addressed.

Received 14 November 1978; accepted 9 February 1979.