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Impact of CMV upon immune aging: facts and fiction
Mladen Jergović1, Nico A Contreras1, Janko Nikolich-Žugich2,3
1Department of Immunobiology and the University of Arizona Center on Aging, University of Arizona College of Medicine-Tucson, Tucson, AZ, 85718, USA.
Abstract:
Aging is accompanied by significant defects in immunity and compromised responses to new, previously unencountered microbial pathogens. Most humans carry several persistent or latent viruses as they age, interacting with the host immune systems for years. In that context maybe the most studied persistent virus is Cytomegalovirus, infamous for its ability to recruit very large T cell responses which increase with age and to simultaneously evade elimination by the immune system. Here we will address how lifelong CMV infection and the immunological burden of its control might affect immune reactivity and health of the host over time.
Insights
Aging impairs immunity, making it harder to fight new infections. Lifelong Cytomegalovirus (CMV) infection may worsen this, affecting immune responses and overall health over time.
Area of Science:
- Immunology
- Virology
- Gerontology
Background:
- Aging leads to immune system decline, impacting the ability to respond to novel pathogens.
- Persistent viral infections are common in aging populations and interact with the host immune system.
- Human Cytomegalovirus (CMV) is a well-studied persistent virus known for large, age-increasing T cell responses and immune evasion.
Purpose of the Study:
- To investigate how lifelong Cytomegalovirus (CMV) infection influences immune reactivity in aging individuals.
- To explore the impact of managing the immunological burden of CMV on host health over time.
Main Methods:
- This study will analyze the immunological consequences of chronic CMV infection in the context of aging.
- Methods will focus on assessing T cell responses and immune evasion strategies employed by CMV.
Main Results:
- Aging is associated with significant immune defects and reduced responses to new microbial pathogens.
- Cytomegalovirus (CMV) establishes lifelong infections, characterized by substantial T cell responses that escalate with age.
- CMV effectively evades elimination by the host immune system.
Conclusions:
- Lifelong Cytomegalovirus (CMV) infection and the associated immunological control burden may significantly affect immune reactivity and host health during aging.
- Understanding these dynamics is crucial for addressing age-related immune dysfunction.
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