Cell Reports (Oct 2023)

Active maintenance of CD8+ T cell naivety through regulation of global genome architecture

  • Brendan E. Russ,
  • Adele Barugahare,
  • Pushkar Dakle,
  • Kirril Tsyganov,
  • Sara Quon,
  • Bingfei Yu,
  • Jasmine Li,
  • Jason K.C. Lee,
  • Moshe Olshansky,
  • Zhaohren He,
  • Paul F. Harrison,
  • Michael See,
  • Simone Nussing,
  • Alison E. Morey,
  • Vibha A. Udupa,
  • Taylah J. Bennett,
  • Axel Kallies,
  • Cornelis Murre,
  • Phillipe Collas,
  • David Powell,
  • Ananda W. Goldrath,
  • Stephen J. Turner

Journal volume & issue
Vol. 42, no. 10
p. 113301

Abstract

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Summary: The differentiation of naive CD8+ T lymphocytes into cytotoxic effector and memory CTL results in large-scale changes in transcriptional and phenotypic profiles. Little is known about how large-scale changes in genome organization underpin these transcriptional programs. We use Hi-C to map changes in the spatial organization of long-range genome contacts within naive, effector, and memory virus-specific CD8+ T cells. We observe that the architecture of the naive CD8+ T cell genome is distinct from effector and memory genome configurations, with extensive changes within discrete functional chromatin domains associated with effector/memory differentiation. Deletion of BACH2, or to a lesser extent, reducing SATB1 DNA binding, within naive CD8+ T cells results in a chromatin architecture more reminiscent of effector/memory states. This suggests that key transcription factors within naive CD8+ T cells act to restrain T cell differentiation by actively enforcing a unique naive chromatin state.

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