Induction of protective immunity to Friend murine leukemia virus in genetic nonresponders to virus envelope protein
- PMID: 2033265
Induction of protective immunity to Friend murine leukemia virus in genetic nonresponders to virus envelope protein
Abstract
(B10.A x A/WySn)F1, H-2a/a, mice are genetic nonresponders to the envelope protein of Friend murine leukemia helper virus (F-MuLV) when immunized with a recombinant vaccinia virus expressing F-MuLV env gene. In contrast these mice can be protectively immunized against leukemogenic Friend virus complex using formalin-fixed F-MuLV virions in CFA. To determine which viral proteins were responsible for this immune protection, virion proteins prepared by SDS-PAGE and electroelution were used to immunize mice. Purified gp70 envelope protein in CFA was capable of inducing strong immune protection against the challenge with Friend virus complex in H-2a/a mice. Immunologic studies demonstrated that immunized mice developed a virus-specific T cell proliferative response and showed IgM to IgG Ig class switching of virus-neutralizing antibodies. These results indicated that genetically controlled immune nonresponsiveness to F-MuLV envelope Ag in H-2a/a mice could be overcome using denatured viral envelope protein together with a strong adjuvant.
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