Abstract:
:Advancing age is accompanied by profound changes in immune function; some are induced by the loss of critical niches that support development of naïve cells (e.g. thymic involution), others by the intrinsic physiology of long-lived cells attempting to maintain homeostasis, still others by extrinsic effects such as oxidative stress or long-term exposure to antigen due to persistent viral infections. Once compensatory mechanisms can no longer maintain a youthful phenotype the end result is the immune senescent milieu - one characterized by chronic, low grade, systemic inflammation and impaired responses to immune challenge, particularly when encountering new antigens. This state is associated with progression of chronic illnesses like atherosclerosis and dementia, and an increased risk of acute illness, disability and death in older adults. The complex interaction between immune senescence and chronic illness provides an ideal landscape for translational research with the potential to greatly affect human health. However, current animal models and even human investigative strategies for immune senescence have marked limitations, and the reductionist paradigm itself may be poorly suited to meet these challenges. A new paradigm, one that embraces complexity as a core feature of research in older adults is required to address the critical health issues facing the burgeoning senior population, the group that consumes the majority of healthcare resources. In this review, we outline the major advantages and limitations of current models and offer suggestions for how to move forward.
journal_name
Semin Immunoljournal_title
Seminars in immunologyauthors
High KP,Akbar AN,Nikolich-Zugich Jdoi
10.1016/j.smim.2012.04.007subject
Has Abstractpub_date
2012-10-01 00:00:00pages
373-82issue
5eissn
1044-5323issn
1096-3618pii
S1044-5323(12)00046-2journal_volume
24pub_type
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journal_title:Seminars in immunology
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journal_title:Seminars in immunology
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journal_title:Seminars in immunology
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journal_title:Seminars in immunology
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journal_title:Seminars in immunology
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journal_title:Seminars in immunology
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journal_title:Seminars in immunology
pub_type: 杂志文章,评审
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journal_title:Seminars in immunology
pub_type: 杂志文章,评审
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journal_title:Seminars in immunology
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journal_title:Seminars in immunology
pub_type: 杂志文章,评审
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journal_title:Seminars in immunology
pub_type: 杂志文章,评审
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journal_title:Seminars in immunology
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journal_title:Seminars in immunology
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journal_title:Seminars in immunology
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journal_title:Seminars in immunology
pub_type: 评论,杂志文章,评审
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journal_title:Seminars in immunology
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journal_title:Seminars in immunology
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journal_title:Seminars in immunology
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journal_title:Seminars in immunology
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journal_title:Seminars in immunology
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journal_title:Seminars in immunology
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journal_title:Seminars in immunology
pub_type: 杂志文章,评审
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journal_title:Seminars in immunology
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