Efficacy of pre-S-containing HBV vaccine combined with lamivudine in the treatment of chronic HBV infection.
Treatment of chronic hepatitis B (CHB) is difficult. The response rate to interferon (IFN) as well as nucleoside analogs is not more than 30% in general. While interferon has many side effects, development of resistance in most of the nucleoside analogs precludes long-term use. Both groups of drugs are most efficacious in patients who already had or develop strong cellular immunity with treatment. A pre-S2-containing vaccine was shown to enhance cellular immunity and suppress hepatitis B virus (HBV)-DNA in subjects with chronic hepatitis B. We aimed to test the efficacy of short-term use of a nucleoside analog in combination with a pre-S2-containing vaccine in patients with CHB. In this open study, 48 consecutive patients (32 males and 16 females, mean age +/- SD: 33 +/- 12 years) with CHB without cirrhosis were treated with 100 mg/day lamivudine and four weekly intramuscular injections of Genhevac B 20 mcg (six doses) for 24 weeks. While 19 patients were hepatitis B e antigen (HBeAg) positive (+ve), 29 patients were Anti-HBe/HBV-DNA +ve at the outset. Response was defined as seroconversion to anti-HBe in HBeAg +ve subjects and normalization of alanine aminotransferase (ALT) with loss of HBV-DNA in anti-HBe/HBV-DNA +ve subjects. HBeAg seroconversion occurred in 5/19 subjects (26%). Eighteen of 29 anti-HBe/HBV-DNA +ves responded. In the follow-up, while relapse was not observed in any of the patients who seroconverted, 11/18 from the anti-HBe/HBV-DNA +ve group relapsed, resulting in a sustained response (SR) rate of 24% in this group. All the relapses happened in the first 48 weeks of follow-up, with no relapse thereafter. Pretreatment high serum HBV-DNA was a strong negative predictor of sustained response (SR) in HBeAg +ve group. Pretreatment serum ALT over 2 x upper limit of normal and HBV-DNA less than 200 pg/ml appeared positive predictors. None of HBeAg +ve previous interferon failures responded. Twenty-four weeks of lamivudine and hepatitis B vaccine treatment induces SR in around 1/4 of the patients with CHB. Most of the responders had high ALT and relatively low DNA.
Senturk
Hakan
H
Department of Gastroenterology, Cerrahpasa Medical Faculty, Istanbul University, Istanbul, Turkey.
Tabak
Fehmi
F
Ozaras
Resat
R
Erdem
Levent
L
Canbakan
Billur
B
Mert
Ali
A
Yurdakul
Ibrahim
I
D000293:Adolescent; D000328:Adult; D003131:Combined Modality Therapy; D005260:Female; D006514:Hepatitis B Surface Antigens / Q000627:therapeutic use*; D017325:Hepatitis B Vaccines / Q000627:therapeutic use*; D019694:Hepatitis B, Chronic / Q000188:drug therapy*; D006801:Humans; D019259:Lamivudine / Q000008:administration & dosage*; D008297:Male; D008875:Middle Aged; D010865:Pilot Projects; D011498:Protein Precursors / Q000627:therapeutic use*; D018894:Reverse Transcriptase Inhibitors / Q000008:administration & dosage*; D055815:Young Adult
D006514:Hepatitis B Surface Antigens; D017325:Hepatitis B Vaccines; D011498:Protein Precursors; D018894:Reverse Transcriptase Inhibitors; C050807:presurface protein 2, hepatitis B surface antigen; D019259:Lamivudine