Post-liver transplant hepatitis B prophylaxis: the role of oral nucleos(t)ide analogues.

PURPOSE OF REVIEW

The established gold standard for prophylaxis against hepatitis B virus (HBV) recurrence post-liver transplant is combination hepatitis B immune globulin (HBIG) and lamivudine. This therapy reduces the risk of recurrence to less than 5% at 5 years; however, the cost of HBIG has led to the investigation of alternatives. This paper reviews the HBIG-sparing alternatives achieved with lamivudine and the prospects for the newer anti-HBV agents in post-liver transplant prophylaxis.

RECENT FINDINGS

When used with lamivudine as part of combination prophylaxis, low-dose intramuscular HBIG is equivalent to high-dose intravenous HBIG. There is recent evidence that in patients receiving HBIG/lamivudine, HBIG can be replaced with adefovir dipivoxil at 6-12 months post-liver transplant without precipitating recurrence. Furthermore, a recent study showed that primary prophylaxis with combination adefovir/lamivudine therapy without the use of long-term HBIG was effective and well tolerated as primary prophylaxis.

SUMMARY

Although there are few studies of potent newer anti-HBV agents such as entecavir or tenofovir being used as HBV prophylaxis, the properties of these drugs suggest that they should replace lamivudine within HBV prophylaxis regimes.