Fetal and adult hematopoietic stem cells give rise to distinct T cell lineages in humans.

Journal Article (Journal Article)

Although the mammalian immune system is generally thought to develop in a linear fashion, findings in avian and murine species argue instead for the developmentally ordered appearance (or "layering") of distinct hematopoietic stem cells (HSCs) that give rise to distinct lymphocyte lineages at different stages of development. Here we provide evidence of an analogous layered immune system in humans. Our results suggest that fetal and adult T cells are distinct populations that arise from different populations of HSCs that are present at different stages of development. We also provide evidence that the fetal T cell lineage is biased toward immune tolerance. These observations offer a mechanistic explanation for the tolerogenic properties of the developing fetus and for variable degrees of immune responsiveness at birth.

Full Text

Duke Authors

Cited Authors

  • Mold, JE; Venkatasubrahmanyam, S; Burt, TD; Michaëlsson, J; Rivera, JM; Galkina, SA; Weinberg, K; Stoddart, CA; McCune, JM

Published Date

  • December 17, 2010

Published In

Volume / Issue

  • 330 / 6011

Start / End Page

  • 1695 - 1699

PubMed ID

  • 21164017

Pubmed Central ID

  • PMC3276679

Electronic International Standard Serial Number (EISSN)

  • 1095-9203

Digital Object Identifier (DOI)

  • 10.1126/science.1196509


  • eng

Conference Location

  • United States