PubMed Health⌕ Search

PubMed · 971948

Diffusible viral interference during arbovirus plaque formation.

Abstract

A radially diffusing zone of nonspecific interference was observed surrounding plaques of Western equine encephalitis virus. The increase in diameters of the zones of interference were linear and more rapid than increases in plaque diameters. These observations raise the possibility that viral-induced interference could account for the diminished growth of Western equine encephalitis virus plaques with time or even the initial formation of plaques. In addition, this system could be used as a model to study localized host defenses during early infection of solid tissues in vivo.

Explore related subjects

Keep this discovery

Explore connections, maps & timelines

BibTeXRIS

G J Stanton. 1976. Diffusible viral interference during arbovirus plaque formation.. https://doi.org/10.1128/iai.13.6.1771-1772.1976

Cite the original work for its findings. Save a collection to share your selection of sources.

KEEP EXPLORING

Related citations

Mutants of sindbis virus. IV. Heterotypic complementation and phenotypic mixing between temperature-sensitive mutants and wild-type Sindbis and Western equine encephalitis viruses.

Heterotypic complementation between temperature-sensitive (ts) mutants of Sindbis (SIN) and Western equine encephalitis (WEE) viruses occurs under appropriate conditions. One heterotypic pair, SIN ts153 X WEE ts39 showed efficient complementation, and four other combinations gave detectable complementation, indicating that these two viruses, which are closely related serologically and biochemically, are sufficiently closely related to complement each other functionally. Cells mixedly infected with ts mutants or wild-type strains of both SIN and WEE viruses produced phenotypically mixed virions, in addition to both parental viruses. Various types of phenotypically mixed virions have been identified by neutralization with corresponding antisera, by thermal inactivation and by temperature sensitivity of replication. Some virions contained WEE genomes and envelopes containing primarily SIN proteins. Other phenotypically mixed virus yields contained primarily doubly neutralizable viruses which are presumed to have a mosaic of envelope proteins. Phenotypically mixed virions were morphologically indistinguishable from the parental types.

Encephalitis Virus, Western Equine↗

Isolation of the structural proteins of western equine encephalitis virus by isoelectric focusing.

Western equine encephalitis virus was disrupted with Triton X-100 and subjected to isoelectric focusing in a sucrose or urea gradient. The two envelope proteins, E1 and E2 were not well separated in a sucrose gradient, while the E1 and E2 proteins were distinguished as two major peaks which focused in a urea gradient at about pH 7.5 and 10, respectively. Isolated E1 protein refocused at pH 6.5 in a sucrose gradient isoelectric focusing column. When Western equine encephalitis virus was treated with Triton X-100 in 0.01 M phosphate buffer (pH6), hemagglutinating E1 protein was solubilized, which isoelectrofocused at pH 6.5. Purified nucleocapsids focused at pH 4 in a sucrose gradient on an isoelectric focusing column. After ribonuclease treatment of the purified nucleocapsid more than 95 per cent of the viral RNA was acid-soluble, and hte nucleocapsid protein isoelectrofocused at about pH 4.

Encephalitis Virus, Western Equine↗