The power and the promise of restimulation-induced cell death in human immune diseases

Andrew L. Snow, Pushpa Pandiyan, Lixin Zheng, Scott M. Krummey, Michael J. Lenardo

Research output: Contribution to journalReview articlepeer-review

Abstract

Controlled expansion and contraction of lymphocytes both during and after an adaptive immune response are imperative to sustain a healthy immune system. Both extrinsic and intrinsic pathways of lymphocyte apoptosis are programmed to eliminate cells at the proper time to ensure immune homeostasis. Genetic disorders of apoptosis described in mice and humans have established Fas and Bim as critical pro-apoptotic molecules responsible for T-cell death in response to T-cell receptor restimulation and cytokine withdrawal, respectively. Emerging evidence prompts revision of this classic paradigm, especially for our understanding of restimulation-induced cell death (RICD) and its physiological purpose. Recent work indicates that RICD employs both Fas and Bim for T-cell deletion, dispelling the notion that these molecules are assigned to mutually exclusive apoptotic pathways. Furthermore, new mouse model data combined with our discovery of defective RICD in X-linked lymphoproliferative disease (XLP) patient T cells suggest that RICD is essential for precluding excess T-cell accumulation and associated immunopathology during the course of certain infections. Here, we review how these advances offer a refreshing new perspective on the phenomenon of T-cell apoptosis induced through antigen restimulation, including its relevance to immune homeostasis and potential for therapeutic interventions.

Original languageEnglish (US)
Pages (from-to)68-82
Number of pages15
JournalImmunological reviews
Volume236
Issue number1
DOIs
StatePublished - Jul 2010
Externally publishedYes

Keywords

  • Apoptosis
  • Autoimmunity
  • Signal transduction
  • T cells
  • T-cell receptors

ASJC Scopus subject areas

  • Immunology and Allergy
  • Immunology

Fingerprint

Dive into the research topics of 'The power and the promise of restimulation-induced cell death in human immune diseases'. Together they form a unique fingerprint.

Cite this