CD62L - memory T cells enhance T-cell regeneration after allogeneic stem cell transplantation by eliminating host resistance in mice

Journal Article

A major challenge in allogeneic hematopoietic cell transplantation is how to transfer T-cell immunity without causing graftversus- host disease (GVHD). Effector memory T cells (CD62L -) are a cell subset that can potentially address this challenge because they do not induce GVHD. Here, we investigated how CD62L - T cells contributed to phenotypic and functional T-cell reconstitution after transplantation. On transfer into allogeneic recipients, CD62L - T cells were activated and expressed multiple cytokines and cytotoxic molecules. CD62L - T cells were able to deplete host radioresistant T cells and facilitate hematopoietic engraftment, resulting in enhanced de novo T-cell regeneration. Enhanced functional immune reconstitution was demonstrated in CD62L -T-cell recipients using a tumor and an influenza virus challenge model. Even though CD62L - T cells are able to respond to alloantigens and deplete host radioresistant immune cells in GVHD recipients, alloreactive CD62L - T cells lost the reactivity over time and were eventually tolerant to alloantigens as a result of prolonged antigen exposure, suggesting a mechanism by which CD62L - T cells were able to eliminate host resistance without causing GVHD. These data further highlight the unique characteristics of CD62L - T cells and their potential applications in clinical hematopoietic cell transplantation. © 2012 by The American Society of Hematology.

Full Text

Duke Authors

Cited Authors

  • Zhang, J; Barefoot, BE; Mo, W; Deoliveira, D; Son, J; Cui, X; Ramsburg, E; Chen, BJ

Published Date

  • 2012

Published In

Volume / Issue

  • 119 / 26

Start / End Page

  • 6344 - 6353

PubMed ID

  • 22596261

International Standard Serial Number (ISSN)

  • 0006-4971

Digital Object Identifier (DOI)

  • 10.1182/blood-2011-03-342055