Abstract:
:Immunological memory is a hallmark of adaptive immunity, a defense mechanism endowed to vertebrates during evolution. However, an autoimmune pathogenic role of memory lymphocytes is also emerging with accumulating evidence, despite reasonable skepticism on their existence in a chronic setting of autoimmune damage. It is conceivable that autoimmune memory would be particularly harmful since memory cells would constantly "remember" and attack the body's healthy tissues. It is even more detrimental given the resistance of memory T cells to immunomodulatory therapies. In this review, we focus on self-antigen-reactive CD(+) effector memory T (TEM) cells, surveying the evidence for the role of the T(EM) compartment in autoimmune pathogenesis. We will also discuss the role of T(EM) cells in chronic and acute infectious disease settings and how they compare to their counterparts in autoimmune diseases. With their long-lasting potency, the autoimmune T(EM) cells could also play a critical role in anti-tumor immunity, which may be largely based on their reactivity to self-antigens. Therefore, although autoimmune T(EM) cells are "bad" due to their role in relentless perpetration of tissue damage in autoimmune disease settings, they are unlikely a by-product of industrial development along the modern surge of autoimmune disease prevalence. Rather, they may be a product of evolution for their "good" in clearing damaged host cells in chronic infections and malignant cells in cancer settings.
journal_name
Immunol Resjournal_title
Immunologic researchauthors
Devarajan P,Chen Zdoi
10.1007/s12026-013-8448-1subject
Has Abstractpub_date
2013-12-01 00:00:00pages
12-22issue
1-3eissn
0257-277Xissn
1559-0755journal_volume
57pub_type
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