Hepatitis B immunoglobulin prophylaxis after liver transplantation: experience in a tertiary transplant centre.

Background: Prophylaxis with hepatitis B immunoglobulin (HBIG) and nucleoside analogs can prevent hepatitis B virus (HBV) recurrence after liver transplant (LT).

Aim: To determine the efficacy and cost of maintaining immunoprophylaxis with HBIG and hyperimmune plasma (HIP) for 6 months after LT.

Material & Methods: The study included 22 HBV related LT recipients who were on entecavir and either HBIG or HIP for 6 months. Post transplant HBIG or HIP dose and cost incurred towards prophylaxis were noted. The cost of 200 IU of HBIG at the time of study was Rs 8250/- (US Dollars 135) and that of 2000 IU of HIP was Rs 8000/- (USD 130.7). The loading and maintenance costs at end of 6 months were compared between the two groups. Response to HBIG and HIP was assessed by checking for HBsAg reactivity, anti HBs titer response and HBV DNA viral load.

Statistical Analysis: Median and range, Kruskal Wallis (KW) sign rank Sum Test and Correlation Coefficient (r2) was used for analysis.

Results: Thirteen recipients received HBIG and 9 recipients HIP. The anti HBs response to HIP was significantly high compared to HBIG (KW Sign rank Sum test P < 0.05); titers remained high until the study period. Between 8 and 30 days, the titer achieved by both HBIG and HIP was similar (KW Sign rank Sum test not significant). Despite low anti HBs titer of <100 IU/L, none of the recipients on HBIG had HBsAg reactivity while 3 on HIP had transient HBsAg positivity. The total cost with HBIG was 13.9 times the cost of HIP.

Conclusion: HIP immunoprophylaxis in combination with entecavir achieves a high anti HBs titer at a significant low cost during anhepatic and loading phase. HBV reactivation rates with HBIG and HIP is low despite low anti HBs titer.