The recovery of circulating antigen-specific T-cell immunity to Epstein-Barr virus (EBV) was determined in ELIspot assays following allogeneic myeloablative or nonmyeloablative stem cell transplantation (MST/NST). In 8 of 12 MST patients receiving an alemtuzumab-treated graft, the frequency of the EBV-specific reactivities was similar to or greater than that seen in the healthy controls. A response was detectable in 3 of 6 and 6 of 9 patients by 3 and 6 months, respectively, and in all patients by one year following MST. In contrast, only 1 of 9 (95% confidence interval
EBV proliferation is seen in the context of advanced liver disease and after liver transplantation. EBV DNA quantitation is a useful tool to examine the effects of immunosuppression on EBV-associated lymphoproliferation, and may be an essential technique for programs exploring the merits of EBV adoptive immunotherapy.
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