Beta cell-specific CD8 + T cells maintain stem cell memory-associated epigenetic programs during type 1 diabetes

Nat Immunol. 2020 May;21(5):578-587. doi: 10.1038/s41590-020-0633-5. Epub 2020 Mar 30.

Abstract

The pool of beta cell-specific CD8+ T cells in type 1 diabetes (T1D) sustains an autoreactive potential despite having access to a constant source of antigen. To investigate the long-lived nature of these cells, we established a DNA methylation-based T cell 'multipotency index' and found that beta cell-specific CD8+ T cells retained a stem-like epigenetic multipotency score. Single-cell assay for transposase-accessible chromatin using sequencing confirmed the coexistence of naive and effector-associated epigenetic programs in individual beta cell-specific CD8+ T cells. Assessment of beta cell-specific CD8+ T cell anatomical distribution and the establishment of stem-associated epigenetic programs revealed that self-reactive CD8+ T cells isolated from murine lymphoid tissue retained developmentally plastic phenotypic and epigenetic profiles relative to the same cells isolated from the pancreas. Collectively, these data provide new insight into the longevity of beta cell-specific CD8+ T cell responses and document the use of this methylation-based multipotency index for investigating human and mouse CD8+ T cell differentiation.

Publication types

  • Research Support, N.I.H., Extramural
  • Research Support, Non-U.S. Gov't

MeSH terms

  • Adolescent
  • Adult
  • Animals
  • Autoantigens / immunology
  • CD8-Positive T-Lymphocytes / physiology*
  • Cell Plasticity
  • Cells, Cultured
  • DNA Methylation
  • Diabetes Mellitus, Type 1 / immunology*
  • Epigenesis, Genetic
  • Female
  • Flow Cytometry
  • Humans
  • Immunologic Memory
  • Insulin-Secreting Cells / immunology*
  • Male
  • Mice
  • Pluripotent Stem Cells / physiology*
  • Single-Cell Analysis
  • Young Adult

Substances

  • Autoantigens