| pubmed-article:6304346 | rdf:type | pubmed:Citation | lld:pubmed |
| pubmed-article:6304346 | lifeskim:mentions | umls-concept:C0011139 | lld:lifeskim |
| pubmed-article:6304346 | lifeskim:mentions | umls-concept:C0042760 | lld:lifeskim |
| pubmed-article:6304346 | lifeskim:mentions | umls-concept:C0043125 | lld:lifeskim |
| pubmed-article:6304346 | lifeskim:mentions | umls-concept:C0010453 | lld:lifeskim |
| pubmed-article:6304346 | lifeskim:mentions | umls-concept:C0026809 | lld:lifeskim |
| pubmed-article:6304346 | lifeskim:mentions | umls-concept:C0521119 | lld:lifeskim |
| pubmed-article:6304346 | lifeskim:mentions | umls-concept:C0007585 | lld:lifeskim |
| pubmed-article:6304346 | lifeskim:mentions | umls-concept:C0332325 | lld:lifeskim |
| pubmed-article:6304346 | lifeskim:mentions | umls-concept:C0231204 | lld:lifeskim |
| pubmed-article:6304346 | lifeskim:mentions | umls-concept:C0936012 | lld:lifeskim |
| pubmed-article:6304346 | lifeskim:mentions | umls-concept:C1521871 | lld:lifeskim |
| pubmed-article:6304346 | lifeskim:mentions | umls-concept:C2349975 | lld:lifeskim |
| pubmed-article:6304346 | pubmed:issue | 3 | lld:pubmed |
| pubmed-article:6304346 | pubmed:dateCreated | 1983-7-8 | lld:pubmed |
| pubmed-article:6304346 | pubmed:abstractText | [3H]uridine-labeled extracellular West Nile virus (WNV) particles produced by cell cultures obtained from genetically resistant C3H/RV and congenic susceptible C3H/HE mice were compared by sucrose density gradient centrifugation as well as by analysis of the particle RNA. Defective interfering (DI) WNV particles were observed among progeny produced during acute infections in both C3H/RV and C3H/HE cells. Although only a partial separation of standard and DI particles was achieved, the DI particles were found to be more dense than the standard virions. Particles containing several species of small RNAs consistently constituted a major proportion of the total population of virus progeny produced by C3H/RV cells, but a minor proportion of the population produced by C3H/HE cells. Decreasing the multiplicity of infection or extensive plaque purification of the WNV inoculum decreased the proportion of small RNAs found in the progeny virus. The ratio of DI particles to standard virus observed in progeny virus was determined by the cell type used to grow the virus. The ratio could be shifted by passaging virus from one cell type to the other. Homologous interference could be demonstrated with WNV produced by C3H/RV cells but not with virus produced by C3H/HE cells. Continued passage of WNV in C3H/HE cells resulted in a cycling of infectivity. However, passage in C3H/RV cells resulted in the complete loss of infectious virus. Four size classes of small viral RNA, with sedimentation coefficients of about 8, 15, 26, and 34S, were observed in the extracellular particles. A preliminary analysis of these RNAs by oligonucleotide fingerprinting indicated that the smaller RNAs were less complex than the 40S RNA and differed from each other. The data are consistent with the conclusion that WNV DI particles interfere more effectively with standard virus replication and are amplified more efficiently in C3H/RV cells than in congenic C3H/HE cells. The relevance of these findings to the further understanding of genetically controlled resistance to flaviviruses is discussed. | lld:pubmed |
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| pubmed-article:6304346 | pubmed:language | eng | lld:pubmed |
| pubmed-article:6304346 | pubmed:journal | http://linkedlifedata.com/r... | lld:pubmed |
| pubmed-article:6304346 | pubmed:citationSubset | IM | lld:pubmed |
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| pubmed-article:6304346 | pubmed:status | MEDLINE | lld:pubmed |
| pubmed-article:6304346 | pubmed:month | Jun | lld:pubmed |
| pubmed-article:6304346 | pubmed:issn | 0022-538X | lld:pubmed |
| pubmed-article:6304346 | pubmed:author | pubmed-author:BrintonM AMA | lld:pubmed |
| pubmed-article:6304346 | pubmed:issnType | Print | lld:pubmed |
| pubmed-article:6304346 | pubmed:volume | 46 | lld:pubmed |
| pubmed-article:6304346 | pubmed:owner | NLM | lld:pubmed |
| pubmed-article:6304346 | pubmed:authorsComplete | Y | lld:pubmed |
| pubmed-article:6304346 | pubmed:pagination | 860-70 | lld:pubmed |
| pubmed-article:6304346 | pubmed:dateRevised | 2011-11-17 | lld:pubmed |
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| pubmed-article:6304346 | pubmed:year | 1983 | lld:pubmed |
| pubmed-article:6304346 | pubmed:articleTitle | Analysis of extracellular West Nile virus particles produced by cell cultures from genetically resistant and susceptible mice indicates enhanced amplification of defective interfering particles by resistant cultures. | lld:pubmed |
| pubmed-article:6304346 | pubmed:publicationType | Journal Article | lld:pubmed |
| pubmed-article:6304346 | pubmed:publicationType | Comparative Study | lld:pubmed |
| pubmed-article:6304346 | pubmed:publicationType | Research Support, U.S. Gov't, P.H.S. | lld:pubmed |
| pubmed-article:6304346 | pubmed:publicationType | Research Support, Non-U.S. Gov't | lld:pubmed |
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