title: Changes of hepatitis B virus DNA in liver and serum caused by recombinant leukocyte interferon treatment: analysis of intrahepatic replicative hepatitis B virus DNA.
abstract: Twenty patients with HBeAg-positive chronic liver disease were given large doses of recombinant leukocyte interferon for 4 weeks. Changes of hepatitis B virus DNA in livers and sera were analyzed by the molecular hybridization technique in paired biopsies obtained before and 2 weeks after treatment. Serum hepatitis B virus DNA was examined before, during and after the treatment until 4 weeks post-interferon. Analysis of hepatic hepatitis B virus DNA revealed species that appeared to represent various forms of replicative hepatitis B virus DNA, i.e., relaxed circular, linear, supercoiled and single-stranded hepatitis B virus DNA, respectively. No evidence of integration of hepatitis B virus DNA in genomic DNA was obtained. Of 15 cases which were positive for hepatic hepatitis B virus DNA before treatment and in which paired biopsies were obtained, hepatic hepatitis B virus DNA became negative in 4, decreased in 5 and unchanged in 6. Among several types of replicative viral DNA in liver tissue, supercoiled hepatitis B virus DNA tended to remain after other forms were reduced. A close correlation between hepatic and serum hepatitis B virus DNA was found in 37 liver biopsy samples and corresponding sera. These results indicate that interferon treatment reduces serum hepatitis B virus levels by inhibiting viral replication in the liver and that persistence or reappearance of hepatitis B virus in serum after interferon is associated with replication.
mesh_terms: D000328:Adult; D002908:Chronic Disease; D004270:DNA, Circular / Q000032:analysis; D004277:DNA, Single-Stranded / Q000032:analysis; D004279:DNA, Viral / Q000032:analysis* / Q000097:blood; D006509:Hepatitis B / Q000382:microbiology / Q000628:therapy*; D006515:Hepatitis B virus / Q000235:genetics*; D006801:Humans; D007370:Interferon Type I / Q000627:therapeutic use*; D008099:Liver / Q000032:analysis* / Q000382:microbiology; D008875:Middle Aged; D014779:Virus Replication
chemical_list: D004270:DNA, Circular; D004277:DNA, Single-Stranded; D004279:DNA, Viral; D007370:Interferon Type I