title: Elevated levels of 2',5'-oligoadenylate synthetase activity in peripheral blood mononuclear cells and serum during acute exacerbation of chronic hepatitis B.
abstract: We measured 2',5'-oligoadenylate synthetase activity in peripheral blood mononuclear cells and serum of 14 HBsAg- and HBeAg-positive patients with chronic hepatitis B with or without acute exacerbation. Elevated levels of 2',5'-oligoadenylate synthetase in peripheral blood mononuclear cells and serum were found in seven chronic hepatitis B patients with acute exacerbation, whereas in the remaining seven chronic hepatitis B patients without acute exacerbation, both levels were similar to those of normal subjects despite active hepatitis B virus multiplication. 2',5'-Oligoadenylate synthetase levels in peripheral blood mononuclear cells and serum, which were not statistically different from those of normal subjects prior to acute exacerbation, increased during acute exacerbation from 3- to 23-fold over initial levels following elevations in ALT activity. 2',5'-Oligoadenylate synthetase levels fluctuated over a normal range while ALT levels were elevated, and they returned to a baseline with ALT normalization. This suggests that the in vivo interferon system may be activated during acute exacerbation, and that this activation may not be a result of hepatitis B virus multiplication alone, but also of a host-immune response to hepatitis B virus multiplication. Three patients were treated with interferon during acute exacerbation. All three had elevated levels of 2',5'-oligoadenylate synthetase in peripheral blood mononuclear cells and serum just before treatment. 2',5'-Oligoadenylate synthetase levels increased only 1.1- to 2.2-fold over initial levels during treatment, with none of the patients clearing HBeAg during and after treatment.(ABSTRACT TRUNCATED AT 250 WORDS)
authors: Third Department of Internal Medicine, Kyoto Prefectural University of Medicine, Japan.
authors: M
authors: M
authors: Shindo
authors: T
authors: T
authors: Okuno
authors: K
authors: K
authors: Arai
authors: M
authors: M
authors: Matsumoto
authors: M
authors: M
authors: Takeda
authors: T
authors: T
authors: Takino
authors: Y
authors: Y
authors: Sokawa
mesh_terms: D015088:2',5'-Oligoadenylate Synthetase / Q000097:blood*; D000328:Adult; D005260:Female; D006509:Hepatitis B / Q000201:enzymology*; D006514:Hepatitis B Surface Antigens / Q000032:analysis; D006513:Hepatitis B e Antigens / Q000032:analysis; D006521:Hepatitis, Chronic / Q000201:enzymology*; D006801:Humans; D007372:Interferons / Q000502:physiology; D007963:Leukocytes, Mononuclear / Q000201:enzymology*; D008297:Male
chemical_list: D006514:Hepatitis B Surface Antigens; D006513:Hepatitis B e Antigens; D007372:Interferons; D015088:2',5'-Oligoadenylate Synthetase