Impaired recovery of Epstein-Barr virus (EBV)-specific CD8+ T lymphocytes after partially T-depleted allogeneic stem cell transplantation may identify patients at very high risk for progressive EBV reactivation and lymphoproliferative disease Academic Article uri icon

Overview

MeSH Major

  • CD8-Positive T-Lymphocytes
  • Hematopoietic Stem Cell Transplantation
  • Herpesvirus 4, Human
  • Lymphocyte Depletion
  • Lymphoproliferative Disorders
  • Virus Activation

abstract

  • Epstein-Barr virus (EBV)-specific cytotoxic T lymphocytes are considered pivotal to prevent lymphoproliferative disease (LPD) in allogeneic stem cell transplantation (SCT) recipients. We evaluated the recovery of EBV-specific CD8+ T cells after partially T-cell-depleted SCT and studied the interaction between EBV-specific CD8+ T cells, EBV reactivation, and EBV-LPD. EBV-specific CD8+ T cells were enumerated using 12 class I HLA tetramers presenting peptides derived from 7 EBV proteins. Blood samples were taken at regular intervals after SCT in 61 patients, and EBV DNA levels were assessed by real-time polymerase chain reaction. Forty-five patients showed EBV reactivation, including 25 with high-level reactivation (ie, more than 1000 genome equivalents [geq] per milliliter). Nine of these 25 patients progressed to EBV-LPD. CD8+ T cells specific for latent or lytic EBV epitopes repopulated the peripheral blood at largely similar rates. In most patients, EBV-specific CD8+ T-cell counts had returned to normal levels within 6 months after SCT. Concurrently, the incidence of EBV reactivations clearly decreased. Patients with insufficient EBV-specific CD8+ T-cell recovery were at high risk for EBV reactivation in the first 6 months after SCT. Failure to detect EBV-specific CD8+ T cells in patients with high-level reactivation was associated with the subsequent development of EBV-LPD (P =.048). Consequently, the earlier defined positive predictive value of approximately 40%, based on high-level EBV reactivation only, increased to 100% in patients without detectable EBV-specific CD8+ T cells. Thus, impaired recovery of EBV-specific CD8+ T cells in patients with high-level EBV reactivation may identify a subgroup at very high risk for EBV-LPD and supports that EBV-specific CD8+ T cells protect SCT recipients from progressive EBV reactivation and EBV-LPD.

publication date

  • June 2003

Research

keywords

  • Academic Article

Identity

Language

  • eng

Digital Object Identifier (DOI)

  • 10.1182/blood-2002-10-3001

PubMed ID

  • 12576337

Additional Document Info

start page

  • 4290

end page

  • 7

volume

  • 101

number

  • 11