title: Serum titers of pre-S(2) antigen in patients with acute and chronic type B hepatitis: relation to serum aminotransferase activity and other hepatitis B virus markers.
abstract: The peptide which is encoded by the pre-S(2) region of hepatitis B virus DNA, the pre-S(2) antigen, was determined quantitatively by an enzyme immunoassay system employing monoclonal antibodies. The prevalence and titer of pre-S(2)Ag were 91.9% (91/99) and 10,356 +/- 19,053 units (mean +/- S.D., arbitrary units) for hepatitis B e antigen (HBeAg)-positive patients with acute and chronic HBV infection and 86.0% (74/86) and 952 +/- 1,565 units for HBeAg-negative subjects. In four patients with acute hepatitis B, pre-S(2)Ag titers changed in parallel with HBV DNA levels, and the disappearance of pre-S(2)Ag from serum was associated with a rapid fall of ALT levels into the normal range, whereas the fluctuation of pre-S(2)Ag titer correlated with persistence of ALT elevations. In all of the 19 episodes of acute exacerbation of hepatitis which occurred in nine patients with chronic active hepatitis B, a significant elevation of pre-S(2)Ag titer was observed, closely overlapping an increase or appearance of HBV DNA, and its peak preceded peaks of ALT by 1 to 11 weeks (mean +/- S.D. = 4.26 +/- 2.57 weeks). These observations suggest that quantitative measurement of pre-S(2)Ag would be useful for estimation of the magnitude of HBV replication and would help predict the prognosis of acute hepatitis B and of acute exacerbation in chronic hepatitis B.
authors.affiliation: First Department of Internal Medicine, Faculty of Medicine, University of Tokyo, Japan.
authors.forename: K
authors.initials: K
authors.lastname: Kurai
authors.forename: S
authors.initials: S
authors.lastname: Iino
authors.forename: K
authors.initials: K
authors.lastname: Koike
authors.forename: K
authors.initials: K
authors.lastname: Mitamura
authors.forename: Y
authors.initials: Y
authors.lastname: Endo
authors.forename: H
authors.initials: H
authors.lastname: Oka
mesh_terms: D000208:Acute Disease; D000410:Alanine Transaminase / Q000097:blood*; D002908:Chronic Disease; D004279:DNA, Viral / Q000032:analysis; D006509:Hepatitis B / Q000276:immunology*; D006514:Hepatitis B Surface Antigens / Q000032:analysis*; D006515:Hepatitis B virus / Q000235:genetics; D006801:Humans; D007124:Immunoenzyme Techniques; D011498:Protein Precursors / Q000032:analysis*; D014759:Viral Envelope Proteins
chemical_list: D004279:DNA, Viral; D006514:Hepatitis B Surface Antigens; D011498:Protein Precursors; D014759:Viral Envelope Proteins; C050807:presurface protein 2, hepatitis B surface antigen; D000410:Alanine Transaminase