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Research Paper

Immunogenicity and Tolerability of Intradermal Administration of an HCV E1-Based Vaccine Candidate in Healthy Volunteers and Patients with Resolved or Ongoing Chronic HCV Infection

Geert Leroux-Roels, Arsène-Hélène Batens, Isabelle Desombere, Bart Van Den Steen, Christine Vander Stichele, Geert Maertens and Frank Hulstaert

volume 1 | issue 2

march/april 2005
Pages: 61 - 65

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The tolerability and immunogenicity of intradermal injections of a candidate HCV vaccine, based on the E1 protein of the hepatitis C virus (HCV), was examined in an exploratory study in healthy volunteers, in subjects with a history of resolved HCV infection, and in patients suffering from therapy-resistant chronic HCV. Sub-epidermal injection of three doses of 4 µg of non-adjuvanted E1 vaccine induced much weaker humoral and cellular immune responses in healthy subjects and chronic HCV patients than the intramuscular administration of 20 µg E1 formulated on alum. However, in three subjects who cleared HCV infection, intradermal administration of this low dose of E1 induced rapid and clear anamnestic responses. These data demonstrate that E1-specific immune responses can be induced in resolving HCV infections and that memory (B and T) cells can be restimulated with suboptimal doses of E1 antigen.



We now provide open access to journal articles published online for one year or more. This article may be downloaded at the following link:
 Download PDF

If the document does not open, please right-click on the link (control-click on a Macintosh) and select the option to save the file to disk.