Age-Related Changes in Thymic Central Tolerance

Jayashree Srinivasan, Jessica N. Lancaster, Nandini Singarapu, Laura P. Hale, Lauren I.R. Ehrlich, Ellen R. Richie

Research output: Contribution to journalReview articlepeer-review

Abstract

Thymic epithelial cells (TECs) and hematopoietic antigen presenting cells (HAPCs) in the thymus microenvironment provide essential signals to self-reactive thymocytes that induce either negative selection or generation of regulatory T cells (Treg), both of which are required to establish and maintain central tolerance throughout life. HAPCs and TECs are comprised of multiple subsets that play distinct and overlapping roles in central tolerance. Changes that occur in the composition and function of TEC and HAPC subsets across the lifespan have potential consequences for central tolerance. In keeping with this possibility, there are age-associated changes in the cellular composition and function of T cells and Treg. This review summarizes changes in T cell and Treg function during the perinatal to adult transition and in the course of normal aging, and relates these changes to age-associated alterations in thymic HAPC and TEC subsets.

Original languageEnglish (US)
Article number676236
JournalFrontiers in immunology
Volume12
DOIs
StatePublished - Apr 22 2021

Keywords

  • central tolerance
  • dendritic cells
  • life span
  • thymic epithelial cells
  • thymus

ASJC Scopus subject areas

  • Immunology and Allergy
  • Immunology

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