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Improving immunity in the elderly: current and future lessons from nonhuman primate models

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Abstract

The immune system must overcome daily challenges from pathogens to protect the body from infection. The success of the immune response to infection relies on the ability to sense and evaluate microbial threats and organize their elimination, while limiting damage to host tissues. This delicate balance is achieved through coordinated action of the innate and adaptive arms of the immune system. Aging results in several structural and functional changes in the immune system, often described under the umbrella term “immune senescence”. Age-related changes affect both the innate and adaptive arms of the immune system and are believed to result in increased susceptibility and severity of infectious diseases, which is further exacerbated by reduced vaccine efficacy in the elderly. Therefore, multiple strategies to improve immune function in the aged are being investigated. Traditionally, studies on immune senescence are conducted using inbred specific pathogen free (SPF) rodents. This animal model has provided invaluable insight into the mechanisms of aging. However, the limited genetic heterogeneity and the SPF status of this model restrict the successful transfer of immunological discoveries between murine models and the clinical setting. More recently, nonhuman primates (NHPs) have emerged as a leading translational model to investigate immune senescence and to test interventions aimed at delaying/reversing age-related changes in immune function. In this article, we review and summarize advances in immuno-restorative approaches investigated in the NHP model system and discuss where the NHP model can support the development of novel therapeutics.

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Acknowledgments

This research was supported by NCRR core grant RR00163, NIH AG 037042, and American Heart Association grant 0930234N. Ilhem Messaoudi and Kristen Haberthur are supported by a fellowship from the Brookdale Foundation.

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Correspondence to Ilhem Messaoudi.

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Meyer, C., Kerns, A., Haberthur, K. et al. Improving immunity in the elderly: current and future lessons from nonhuman primate models. AGE 34, 1157–1168 (2012). https://doi.org/10.1007/s11357-011-9353-y

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  • DOI: https://doi.org/10.1007/s11357-011-9353-y

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