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Updated: Dec 25, 2025

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

Hossam A Abdelsamed1,2, Caitlin C Zebley1,3, Hai Nguyen4

  • 1Department of Immunology, St. Jude Children's Research Hospital, Memphis, TN, USA.

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|April 2, 2020
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Summary

Type 1 diabetes (T1D) involves autoreactive CD8+ T cells. These cells maintain stem-like epigenetic potential, influencing their longevity and response to antigens.

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Area of Science:

  • Immunology
  • Endocrinology
  • Epigenetics

Background:

  • Type 1 diabetes (T1D) is characterized by autoimmune destruction of pancreatic beta cells.
  • CD8+ T cells targeting beta cells persist despite continuous antigen exposure, suggesting unique survival mechanisms.

Purpose of the Study:

  • To investigate the epigenetic basis for the long-lived nature of beta cell-specific CD8+ T cells in T1D.
  • To establish and utilize a DNA methylation-based multipotency index for assessing T cell differentiation states.

Main Methods:

  • Development of a DNA methylation-based T cell multipotency index.
  • Single-cell assay for transposase-accessible chromatin using sequencing (scTFA-seq).
  • Analysis of CD8+ T cell distribution and epigenetic profiles in murine lymphoid and pancreatic tissues.

Main Results:

  • Beta cell-specific CD8+ T cells exhibit a stem-like epigenetic multipotency score.
  • Individual T cells display a mix of naive and effector epigenetic programs.
  • T cells from lymphoid tissue retain greater epigenetic plasticity than those from the pancreas.

Conclusions:

  • Epigenetic multipotency contributes to the longevity of autoreactive CD8+ T cells in T1D.
  • The multipotency index is a valuable tool for studying CD8+ T cell differentiation in T1D.
  • Understanding T cell plasticity is crucial for developing T1D immunotherapies.