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Old Hosts, Young Models: Rethinking Cancer Immune Evasion in Aging
Nigar Karimova1, Leyla Karimova2, Bayram Bayramov1
1Laboratory of Human Genetics, Genetic Resources Institute, Ministry of Science and Education of Azerbaijan, 155 Azadlig Avenue, Baku AZ1106, Azerbaijan.
Aging and Disease
|August 11, 2026
Summary
Cancer immunity frameworks built on young models may not apply to older adults. Aging alters immune defenses, suggesting
Area of Science:
- Immunology
- Oncology
- Gerontology
Background:
- Standard cancer immunoediting and checkpoint blockade frameworks are based on young models and under-enroll older adults.
- Aging significantly impacts the host immune system, potentially altering tumor evasion mechanisms.
Purpose of the Study:
- To evaluate if the standard cancer immunoediting framework holds true in aged hosts.
- To assess the impact of aging on four key host capacities: T-cell repertoire, stromal environment, natural killer (NK) cell surveillance, and chronic inflammation.
Main Methods:
- Review of existing literature focusing on cancer immunology and aging.
- Analysis of how aging affects specific immune components and the tumor microenvironment.
Main Results:
- Aging alters T-cell repertoire, NK cell function, stromal environment, and baseline inflammation.
- Thymic involution and NK cell decline reduce immune capacity, while stromal senescence and inflammaging create a suppressive microenvironment.
- Clinical trial data shows similar checkpoint blockade benefits for older and younger patients, but this may mask underlying age-related immune differences.
Conclusions:
- Chronological age is a poor predictor of response; immunological age is more relevant.
- Therapeutic strategies must address both immune suppression release and correction of the aged microenvironment.
- Senolytic strategies are being investigated to target age-related microenvironmental changes.
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