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Aging and lymphokine production by T cell subsets
D N Ernst1, W O Weigle, M V Hobbs
1Department of Immunology, Scripps Research Institute, La Jolla, California 92037.
Stem Cells (Dayton, Ohio)
|November 1, 1993
Summary
The aging immune system shows significant T lymphocyte changes, affecting CD4+ and CD8+ T cells. These alterations impact immune function in older mammals, including humans.
Area of Science:
- Immunology
- Gerontology
- Cell Biology
Background:
- The mammalian immune system changes throughout life, from sexual maturity to old age.
- These age-associated changes can increase susceptibility to diseases like infections, cancers, and degenerative conditions.
- T lymphocytes (T cells), including CD4+ and CD8+ subpopulations, are particularly affected by aging.
Purpose of the Study:
- To review the functionally distinct subsets within CD4+ and CD8+ T cell populations.
- To describe how the proportions of these subsets change during the aging process.
- To discuss the implications of these changes for immune responsiveness in older individuals.
Main Methods:
- Focus on the mouse model system to study age-associated immune changes.
- Summarize existing research on T cell subsets and their alterations with age.
- Analyze changes in lymphokine production and functional attributes of the aged T cell pool.
Main Results:
- Aging alters the representation of functionally distinct CD4+ and CD8+ T cell subsets.
- These alterations lead to changes in lymphokine production and overall T cell function.
- Evidence suggests similar changes occur in aging humans.
Conclusions:
- Age-associated shifts in T cell subsets significantly impact immune function in late life.
- Understanding these changes is crucial for addressing immune decline and disease susceptibility in the elderly.
- The findings highlight the need for further research into interventions to support immune health in aging populations.