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J Gen Virol 38 (1978), 339-350; DOI 10.1099/0022-1317-38-2-339
© 1978 Society for General Microbiology
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Cellular and Humoral Immunity in Guinea Pigs to Two Major Polypeptides Derived from Hepatitis B Surface Antigen

Guy A. Cabral, Francine Marciano-Cabral, Glenn A. Funk*, Yanuario Sanchez, F. Blaine Hollinger, Joseph L. Melnick and Gordon R. Dreesman

Department of Virology and Epidemiology, Baylor College of Medicine, Houston, Texas 77030, U.S.A.

Guinea pigs immunized with hepatitis B surface antigen (HBsAg), types adw, adr and ayw, and with two major polypeptides derived from HBsAg/adw developed cell-mediated immunity as determined by the macrophage migration inhibition assay. Peritoneal exudate cells from animals immunized with a 22000- or a 25000-mol. wt. polypeptide derived from HBsAg/adw showed significant migration inhibition after challenge with either polypeptide or with purified HBsAg. Significant inhibition of macrophage migration was not observed when polypeptide-sensitized cells were challenged with normal human serum or with normal human liver extract. Similarly, a cell-mediated immune response was not observed in peritoneal exudate cells from animals sensitized to normal human serum or normal human liver extract which were challenged with either of the polypeptides. The humoral immune response to either of the polypeptides, as measured by radioimmunoassay, was substantially lower than that observed in animals immunized with intact particles. This apparent difference between cellular and humoral responses suggests that the macrophage migration assay is a sensitive indicator of the immunogenicity of the smaller mol. wt. HBsAg-derived polypeptides in guinea pigs.

* Present address: Department of Biological Sciences, San Jose State University, San Jose, California 95192, U.S.A.

Received 5 July 1977; accepted 6 September 1977.




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Copyright © 1978 by the Society for General Microbiology.