Tumor necrosis factor promotes human T-cell development in nonobese diabetic/severe combined immunodeficient mice

Sarit Samira, Christophe Ferrand, Amnon Peled, Arnon Nagler, Yosef Tovbin, Herzl Ben-Hur, Naomi Taylor, Amiela Globerson, Tsvee Lapidot

Research output: Contribution to journalArticlepeer-review

Abstract

A major problem after clinical hematopoietic stem cell transplantations is poor T-cell reconstitution. Studying the mechanisms underlying this concern is hampered, because experimental transplantation of human stem and progenitor cells into nonobese diabetic/severe combined immunodeficient (NOD/SCID) mice usually results in low T-lymphocyte reconstitution. Because tumor necrosis factor α (TNFα) has been proposed to play a role in T-lineage commitment and differentiation in vitro, we investigated its potential to augment human T-cell development in vivo. Administration of TNF to irradiated NOD/SCID mice before transplantation of human mononuclear cells from either cord blood or adult G-CSF-mobilized peripheral blood (MPBL) led 2-3 weeks after transplantation to the emergence of human immature CD4+CD8 + double-positive T-cells in the bone marrow (BM), spleen, and thymus, and in this organ, the human cells also express CD1a marker. One to 2 weeks later, single-positive CD4+ and CD8+ cells expressing heterogenous T-cell receptor αβ were detected in all three organs. These cells were also capable of migrating through the blood circulation. Interestingly, human T-cell development in these mice was associated with a significant reduction in immature lymphoid human CD19 + B cells and natural killer progenitors in the murine BM. The human T cells were mostly derived from the transplanted immature CD34+ cells. This study demonstrates the potential of TNF to rapidly augment human T lymphopoiesis in vivo and also provides clinically relevant evidence for this process with adult MPBL progenitors.

Original languageEnglish
Pages (from-to)1085-1100
Number of pages16
JournalStem Cells
Volume22
Issue number6
DOIs
StatePublished - 2004
Externally publishedYes

Keywords

  • Cord blood
  • Mobilized peripheral blood cells Hematopoietic stem cells
  • T lymphopoiesis
  • TNF
  • Transplantation

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