Differential effect of ARA-AMP on serum DNA polymerase activity and serum HBV-DNA in chronic hepatitis B virus infection. A possible reason for lack of efficacy

J Hepatol. 1986:3 Suppl 2:S81-6. doi: 10.1016/s0168-8278(86)80104-0.

Abstract

An uncontrolled pilot study of adenine arabinoside monophosphate intramuscularly (ARA-AMP) for 5 days at 10 mg/kg/day and 23 days at 5 mg/kg/day in divided doses, was conducted in 15 consecutive patients known to be HBeAg-positive for a minimum of 12 months. Two patients were lost to follow-up (1 having developed an hepatoma). Of the remaining 13, 11 remained HBeAg-positive at 1 year. During treatment, the median serum DNA polymerase (DNAp) activity fell from 592 cpm to 203 cpm/200 microliters. Of 12 patients initially positive for DNA polymerase, complete inhibition during treatment occurred in 6 and was permanent in 2, who developed anti-HBe. In the remaining 4 and in 6 further patients in whom inhibition was substantial but incomplete, DNAp activity rose to pretreatment levels within 1 month of completing treatment. All these patients remained DNAp + HBeAg-positive at one year. Serum HBV-DNA was measured in 7 patients, 6 who were initially DNAp-positive and 4 of whom had complete inhibition of DNAp during treatment. All 7 remained positive for HBV-DNA during treatment. Although side-effects were common there were no significant changes in biochemical or haematological parameters during or subsequent to therapy. Over the subsequent 48 months 2 more patients have developed an hepatoma and a further 5 have lost HBeAg; the 4 patients who remain alive and HBeAg-positive all had chronic persistent hepatitis initially.(ABSTRACT TRUNCATED AT 250 WORDS)

MeSH terms

  • Adult
  • Arabinonucleotides / therapeutic use*
  • DNA, Viral / blood*
  • DNA-Directed DNA Polymerase / blood*
  • Female
  • Hepatitis B / drug therapy*
  • Hepatitis B e Antigens / analysis
  • Hepatitis B virus / genetics*
  • Hepatitis B virus / physiology
  • Hepatitis, Chronic / drug therapy*
  • Humans
  • Male
  • Middle Aged
  • Pilot Projects
  • Time Factors
  • Vidarabine Phosphate / administration & dosage
  • Vidarabine Phosphate / therapeutic use*
  • Virus Replication / drug effects

Substances

  • Arabinonucleotides
  • DNA, Viral
  • Hepatitis B e Antigens
  • Vidarabine Phosphate
  • DNA-Directed DNA Polymerase