Transcription Factor 7 Limits Regulatory T Cell Generation in the Thymus

Forskningsoutput: TidskriftsbidragArtikel i vetenskaplig tidskrift

Abstract

Regulatory T cells (Tregs) differentiate in the thymus, but the mechanisms that control this process are not fully understood. We generated a comprehensive quantitative and differential proteome of murine Tregs and conventional T cells. We identified 5225 proteins, 164 of which were differentially expressed in Tregs. Together with the comparative analysis of proteome and gene expression data, we identified TCF7 as a promising candidate. Genetic elimination of transcription factor 7 (TCF7) led to increased fractions of Tregs in the thymus. Reduced levels of TCF7, found in the heterozygote, resulted in a greater potential for Treg precursors to differentiate into the Treg lineage. In contrast, activation of TCF7 through β-catenin had the opposite effect. TCF7 levels influenced the required TCR signaling strength of Treg precursors, and TCF7 deficiency broadened the repertoire and allowed lower TCR affinities to be recruited into the Treg lineage. FOXP3 was able to repress TCF7 protein expression. In summary, we propose a regulatory role for TCF7 in limiting access to the Treg lineage.

Detaljer

Författare
  • Melanie M Barra
  • David M Richards
  • Jenny Hansson
  • Ann-Cathrin Hofer
  • Michael Delacher
  • Jan Hettinger
  • Jeroen Krijgsveld
  • Markus Feuerer
Enheter & grupper
Externa organisationer
  • European Molecular Biology Laboratory Heidelberg
Forskningsområden

Ämnesklassifikation (UKÄ) – OBLIGATORISK

  • Immunologi inom det medicinska området

Nyckelord

Originalspråkengelska
Sidor (från-till)3058-70
Antal sidor13
TidskriftJournal of Immunology
Volym195
Utgivningsnummer7
StatusPublished - 2015 okt 1
PublikationskategoriForskning
Peer review utfördJa