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Variability of the envelope regions of HCV in European isolates and its significance for diagnostic tools

  • M. Roggendorf
  • M. Lu
  • K. Fuchs
  • G. Ernst
  • M. Höhne
  • E. Schreier
Part of the Archives of Virology book series (ARCHIVES SUPPL, volume 7)

Summary

Following the original description of HCV in 1989 a tremendous amount of sequence data is now available. Based on the 8 complete nucleotide sequences published so far at least 4 genotypes can be distinguished. Partial sequences of additional HCV isolates indicate the existence of further genotypes. A serological typing is not yet possible. For detection of virus, reverse transcription and amplification of the 5′ non coding region is most commonly performed. This region of the genome is highly conserved among all isolates. In this study we used regions of the El and E2 gene in order to classify HCV isolates. The nucleotide sequences of regions in El and E2 gene of different European isolates from Germany, Croatia, Hungaria, and Rumania were determined and compared to recently published RNA sequences of American and Japanese HCV isolates. The cDNA, obtained by reverse transcription of viral RNA extracted from sera was amplified by nested PCR, cloned and sequenced. Within 564 nucleotides (nt) of El we found 87–90% homology (and 89–92% homology at aa level) compared to sequences of Japanese origin and 73–74% homology (77–81% at aa level) compared to the prototype HCV sequence (ptHCV-I). In all characterized isolates the sequence of E2 (643 nucleotides) showed a homology of about 83% at the nucleotide level as compared to genotype II sequences, and a homology of about 70% to genotype I. Our results confirm the existence of two hypervariable regions in the E2 gene of genotype II sequences. Our results also indicate together with other reports from European HCV isolates that genotype II is predominant in Europe.

Keywords

Hypervariable Region European Isolate Envelope Region Partial Nucleotide Sequence Analysis 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

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Copyright information

© Springer-Verlag 1993

Authors and Affiliations

  • M. Roggendorf
    • 1
    • 4
  • M. Lu
    • 1
  • K. Fuchs
    • 2
  • G. Ernst
    • 2
  • M. Höhne
    • 3
  • E. Schreier
    • 3
  1. 1.Institute of VirologyUniversity of EssenEssenFederal Republic of Germany
  2. 2.Max von Pettenkofer-InstituteUniversity of MunichMunichFederal Republic of Germany
  3. 3.Robert Koch-Institut des BundesgesundheitsamtesBerlinFederal Republic of Germany
  4. 4.Institute of VirologyUniversity of EssenEssenFederal Republic of Germany

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