Linkage between dendritic and T cell commitments in human circulating hematopoietic progenitors Academic Article uri icon

Overview

MeSH Major

  • Dendritic Cells
  • Hematopoietic Stem Cells
  • Multipotent Stem Cells
  • T-Lymphocytes

abstract

  • The relationships between commitments of dendritic cells (DCs) and T cells in human hematopoietic stem cells are not well understood. In this study, we enumerate and characterize conventional DC and plasmacytoid DC precursors in association with T cell and thymus-derived types of NK cell precursors among CD34(+) hematopoietic progenitor cells (HPCs) circulating in human peripheral blood. By limiting-dilution analyses using coculture with stroma cells expressing Notch1 ligand, the precursor frequencies (PFs) of DCs in HPCs were found to significantly correlate with T cell PFs, but not with NK cell PFs, among healthy donors. Clonal analyses showed that the majority of T/NK dual- and T single-lineage precursors-but only a minority of NK single-lineage precursors-were associated with the generation of DC progenies. All clones producing both DC and T cell progenies were found with monocyte and/or granulocyte progenies, suggesting DC differentiation via myeloid DC pathways. Analyses of peripheral blood HPC subpopulations revealed that the lineage split between DC and T/NK cell progenitor occurs at the stage prior to bifurcation into T and NK cell lineages. The findings suggest a strong linkage between DC and T cell commitments, which may be imprinted in circulating lymphoid-primed multipotent progenitors or in more upstream HPCs.

publication date

  • June 15, 2014

Research

keywords

  • Academic Article

Identity

Language

  • eng

PubMed Central ID

  • PMC4048771

Digital Object Identifier (DOI)

  • 10.4049/jimmunol.1303260

PubMed ID

  • 24835400

Additional Document Info

start page

  • 5749

end page

  • 60

volume

  • 192

number

  • 12