Related Experiment Video
Updated: Sep 29, 2025
08:34
Utilizing Murine Inducible Telomerase Alleles in the Studies of Tissue Degeneration/Regeneration and Cancer
Published on: April 13, 2015
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Telomerase deficiency reflects age-associated changes in CD4+ T cells
Diana M Matthe1, Oana-Maria Thoma1,2, Tobias Sperka3
1Department of Medicine 1, Friedrich-Alexander-Universität Erlangen-Nürnberg, Universitätsklinikum Erlangen, Ulmenweg 18, 91054, Erlangen, Germany.
Immunity & Ageing : I & A
|March 24, 2022
Summary
Telomere shortening in mice lacking telomerase (mTerc-/-) leads to reduced CD4+ T cells and altered effector function, mimicking aging immune defects. This highlights telomere length
Area of Science:
- Immunology
- Molecular Biology
- Aging Research
Background:
- Aging is associated with immune dysfunction and telomere shortening.
- Telomerase elongates telomeres in T cells, but its role in CD4+ T cell aging is unclear.
- Studying telomere shortening in CD4+ T cells can illuminate age-related immune decline.
Purpose of the Study:
- To investigate the impact of telomere shortening on CD4+ T cell numbers and function.
- To understand the role of telomerase in T cell differentiation and effector responses.
- To establish a mouse model for studying age-related adaptive immunity defects.
Main Methods:
- Comparison of telomerase-deficient (mTerc-/-) mice and control mice.
- Analysis of T cell populations in blood, thymus, and lymphoid organs.
- In vitro T cell stimulation and Th1 polarization assays.
- Assessment of cytokine production (IFNγ) and cell surface marker expression (CD28).
Main Results:
- mTerc-/- mice showed reduced CD4+ T cell numbers and a decline in naïve T cells.
- Telomerase-deficient CD4+ T cells exhibited increased IFNγ production and reduced CD28 expression post-polarization.
- Telomerase-deficient T cells were more sensitive to IL-6 mediated inhibition of Th1 polarization.
- These findings mirror changes observed in aged human T cells.
Conclusions:
- Telomere shortening is implicated in T cell aging and immune dysfunction.
- mTerc-/- mice serve as a valuable model for studying age-related adaptive immunity defects.
- These findings have potential clinical implications for immune diseases and cancer development.
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