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Evolutionary rate and genetic drift of hepatitis C virus are not correlated with the host immune response: Studies of infected donor-recipient clusters
Mid Sweden University, Faculty of Science, Technology and Media, Department of Engineering, Physics and Mathematics.
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2000 (English)In: Journal of Virology, ISSN 0022-538X, E-ISSN 1098-5514, Vol. 74, no 6, 2541-2549 p.Article in journal (Refereed) Published
Abstract [en]

Six donor-recipient clusters of hepatitis C virus (HCV)-infected individuals were studied. For five clusters the period of infection of the donor could be estimated, and for all six clusters the time of infection of the recipients from the donor via blood transfusion was also precisely known. Detailed phylogenetic analyses were carried out to investigate the genomic evolution of the viral quasispecies within infected individuals in each cluster. The molecular clock analysis showed that HCV quasispecies within a patient are evolving at the same rate and that donors that have been infected for longer time tend to have a lower evolutionary rate. Phylogenetic analysis based on the split decomposition method revealed different evolutionary patterns in different donor-recipient clusters. Reactivity of antibody against the first hypervariable region (HVR1) of HCV in donor and recipient sera was evaluated and correlated to the calculated evolutionary rate. Results indicate that anti-HVR1 reactivity was related more to the overall level of humoral immune response of the host than to the HVR1 sequence itself, suggesting that the particular sequence of the HVR1 peptides is not the determinant of reactivity. Moreover, no correlation was found between the evolutionary rate or the heterogeneity of the viral quasispecies in the patients and the strength of the immune response to HVR1 epitopes, Rather, the results seem to imply that genetic drift is less dependent on immune pressure than on the rate of evolution and that the genetic drift of HCV is independent of the host immune pressure.

Place, publisher, year, edition, pages
2000. Vol. 74, no 6, 2541-2549 p.
Keyword [en]
multiple sequence alignment, hypervariable region-1, neutralizing, antibodies, hyperimmune serum, chimpanzees, epidemiology, transmission, reactivity, diversity, variants
National Category
Medical and Health Sciences
Identifiers
URN: urn:nbn:se:miun:diva-13690DOI: 10.1128/JVI.74.6.2541-2549.2000ISI: 000085447100006PubMedID: 10684268Scopus ID: 2-s2.0-0034049454OAI: oai:DiVA.org:miun-13690DiVA: diva2:412243
Available from: 2011-04-21 Created: 2011-04-21 Last updated: 2016-10-11Bibliographically approved

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CiteExportLink to record
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Cite
Citation style
  • apa
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