Linked Life Data

8249288

Source:http://linkedlifedata.com/resource/pubmed/id/8249288

Statements in which the resource exists as a subject.
PredicateObject
rdf:type
lifeskim:mentions
pubmed:issue
2
pubmed:dateCreated
1993-12-23
pubmed:abstractText
To substantiate and extend the quasispecies model of hepatitis C virus (HCV), we made a pairwise comparison in the nucleotide and deduced amino acid sequences for multiple recombinant clones of the E2/NS1 region, which derived from each blood sample taken from five patients of subtype II or subtype III infection at different stages. Sequence heterogeneity among the clones was generally high. The heterogeneity, however, changed temporally and appeared to be significantly lowered after interferon therapy. The temporal fluctuation involved selection of particular amino acids at particular positions, which had represented only a minor fraction or had been absent in the previous clones. Evolution of defective viruses was featured by most of the cases, the proportion of which also fluctuated temporally and was extremely high at a certain stage in one of the patients. A comparison was also made among the clones from different stages of each patient and revealed highly divergent clones. An extreme case of subtype III infection showed sequence differences well beyond those among chronologically and geographically different isolates of subtype I or subtype II, which were defined by the same calculation of available sequence data. These features of HCV genome suggest that the virus could circulate as an extremely heterogeneous population including defective viruses and that this heterogeneity lends itself to selection pressures including interferon therapy and host immune response. Our results also indicate an absolute need of population based approach in HCV genetics.
pubmed:language
eng
pubmed:journal
pubmed:citationSubset
IM
pubmed:chemical
pubmed:status
MEDLINE
pubmed:month
Dec
pubmed:issn
0042-6822
pubmed:author
pubmed:issnType
Print
pubmed:volume
197
pubmed:owner
NLM
pubmed:authorsComplete
Y
pubmed:pagination
659-68
pubmed:dateRevised
2008-11-21
pubmed:meshHeading
pubmed:year
1993
pubmed:articleTitle
Dynamics of genome change in the E2/NS1 region of hepatitis C virus in vivo.
pubmed:affiliation
Third Department of Internal Medicine, Nagoya University School of Medicine, Japan.
pubmed:publicationType
Journal Article, Comparative Study, Research Support, Non-U.S. Gov't