Loss of CD44^dim Expression from Early Progenitor Cells Marks T-Cell Lineage Commitment in the Human Thymus.

ABSTRACT: Human T-cell development is less well studied than its murine counterpart due to the lack of genetic tools and the difficulty of obtaining cells and tissues. Here, we report the transcriptional landscape of 11 immature, consecutive human T-cell developmental stages. The changes in gene expression of cultured stem cells on OP9-DL1 match those of ex vivo isolated murine and human thymocytes. These analyses led us to define evolutionary conserved gene signatures that represent pre- and post-αβ T-cell commitment stages. We found that loss of dim expression of CD44 marks human T-cell commitment in early CD7⁺CD5⁺CD45^dim cells, before the acquisition of CD1a surface expression. The CD44^-CD1a^- post-committed thymocytes have initiated in

SUBMITTER: Cante-Barrett K 

PROVIDER: S-EPMC5247458 | biostudies-literature | 2017

REPOSITORIES: biostudies-literature