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Memory T cells need CD28 costimulation to remember
Journal article   Open access   Peer reviewed

Memory T cells need CD28 costimulation to remember

Alina C Boesteanu and Peter D Katsikis
Seminars in immunology, v 21(2), pp 69-77
Apr 2009
PMID: 19268606
url
https://europepmc.org/articles/pmc2923542View
Accepted (AM)Open Access (License Unspecified) Open

Abstract

Aging - immunology Animals Autoimmune Diseases - immunology CD28 Antigens - immunology CD28 Antigens - metabolism Cell Differentiation Graft Rejection - immunology Humans Immunologic Memory Infection - immunology Lymphocyte Activation - immunology Neoplasms - immunology Neoplasms - pathology Receptor Cross-Talk - immunology Signal Transduction - immunology T-Lymphocytes - cytology T-Lymphocytes - immunology T-Lymphocytes - metabolism Tumor Necrosis Factors - immunology
The activation and expansion of naïve T cells require costimulatory signals provided by CD28 and TNF family members. In contrast, for many years it was believed that memory T cells do not require CD28 costimulation for expansion during secondary responses. This was based on in vitro experiments that suggested the re-activation of memory T cells is somewhat independent of costimulation. Recent in vivo evidence, however, has challenged this and shown that both CD4+ and CD8+ memory T cells require CD28 costimulation for maximal expansion and pathogen clearance. This requirement has important implications for host immunity, vaccine development and immunotherapeutics.

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Immunology
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