ANTIBODY TO THE HEPATITIS B VIRUS RECEPTOR FOR POLYMERIZED ALBUMIN IN ACUTE INFECTION AND HEPATITIS B VACCINE RECIPIENTS

A receptor for polymerized human serum albumin is encoded by the pre-S region of the hepatitis B virus genome and may mediate attachment of the virion to hepatocytes. To investigate antibody response to the virus receptor we studied sera and their IgG fractions for inhibitory activity on hemagglutination of polyalbumin-coated red cells by virus particles containing the pre-S polypeptide. By this method antibody to the receptor was detected in serum in a goat immunized with pre-S containing particles, with no relation to levels of antibody to hepatitis B surface antigen, and in the sera of 33% and 83%, respectively, of acute hepatitis B patients studied during the early phase of illness and during convalescence. In contrast, antibody to the receptor was not detected in serum in any of the 47 subjects immunized with a commercial, plasma-derived, hepatitis B vaccine. These results demonstrate that natural acute infection with hepatitis B virus leads to production of antibody to the virus receptor for polyalbumin, while such antibody response is absent after immunization with currently licensed hepatitis B vaccines.