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Abstract
To explore the effects of HBsAg pulsed dendritic vaccination on anti-HBs production in immunosuppressed rats after liver transplantation (LT). Brown-Norway liver allografts were transplanted into Lewis recipients. The transplanted Lewis rats were injected with EK506 (2 mg/kg) and randomly divided into two groups: rats in HBsAg-DCs group (n = 15) were intraperitoneally injected with HBsAg pulsed DCs at 14 d and 28 d after LT, and rats in the HBsAg group (n = 15) were injected with HBsAg (200 mul) once a week for 12 weeks. Rats without any immunosuppressive treatment after LT served as controls (n = 5). IL-2 and IFN-gamma mRNA expression in spleen were analyzed by RT-PCR, serum IL-2, IFN-gamma and anti-HBs were detected by ELISA. High dose of FK506 resulted in the immunosuppressed in LT rats, as evident by low production of IL-2 and IFN-gamma, and without liver rejection compared to rats in the control group. HBsAg-DCs induced high titer of anti-HBs antibody, however, titer of anti-HBs were seldom detectable in the HBsAg group at 1, 2 and 3 mouth after vaccination. The capacity of HBsAg-DCs to induce anti-HBs in immunosuppressed rats suggested that DC vaccine may prevent HBV recurrence in liver transplanted patients.
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