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. 1986 Jan;57(1):197–204. doi: 10.1128/jvi.57.1.197-204.1986

Semipermissive Replication of a Nuclear Polyhedrosis Virus of Autographa californica in a Gypsy Moth Cell Line

J Thomas McClintock 1,*, Edward M Dougherty 1, Ronald M Weiner 2
PMCID: PMC252715  PMID: 16789253

Abstract

Several gypsy moth cell lines have been previously described as nonpermissive for the multiple-embedded nuclear polyhedrosis virus of Autographa californica (AcMNPV). In this report, we demonstrate the semipermissive infection of a gypsy moth cell line, IPLB-LD-652Y, with AcMNPV. IPLB-LD-652Y cells infected with AcMNPV produced classic cytopathic effects but failed to yield infectious progeny virus. Results of experiments employing DNA-DNA dot hybridization suggested that AcMNPV DNA synthesis was initiated from 8 to 12 h postinfection (p.i.), continued at a maximum rate from 12 to 20 h p.i., and declined from 20 to 36 h p.i. The rate of AcMNPV DNA synthesis approximated that observed in the permissive TN-368 cell line. AcMNPV-infected IPLB-LD-652Y cells, pulse-labeled with [35S]methionine at various time intervals p.i. and analyzed by sodium dodecyl sulfate-polyacrylamide gel electrophoresis, revealed four virus-induced proteins, one novel to the semipermissive system and three early α proteins, synthesized from 1 to 20 h p.i. Thereafter, both host and viral protein synthesis was completely suppressed. These results suggest that AcMNPV adsorbed, penetrated, and initiated limited macromolecular synthesis in the semipermissive gypsy moth cell line. However, the infection cycle was restricted during the early phase of AcMNPV replication.

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Selected References

These references are in PubMed. This may not be the complete list of references from this article.

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