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Updated: Jan 19, 2026

Induction and Validation of Cellular Senescence in Primary Human Cells
Published on: June 20, 2018
Age related human T cell subset evolution and senescence
Mingde Li1, Danlin Yao1, Xiangbo Zeng1
11Department of Hematology, First Affiliated Hospital; Institute of Hematology, School of Medicine; Key Laboratory for Regenerative Medicine of Ministry of Education, Jinan University, No.601 West of Huangpu Avenue, Guangzhou, 510632 China.
Stem cell memory T cells (TSCM) remain stable with age and gender, suggesting their crucial role in maintaining long-term immunity. Their numbers decrease with age, but their ratio to naive T cells increases, highlighting their importance in aging immunity.
Area of Science:
- Immunology
- Cell Biology
- Gerontology
Background:
- T cells are crucial for immune defense against pathogens and cancer.
- Immune responses decline with age due to changes in T cell subsets.
- Stem cell memory T cells (TSCM) are vital for T cell homeostasis and long-term immunity.
Purpose of the Study:
- To investigate the impact of aging and gender on TSCM populations.
- To understand the role of TSCM in maintaining immune function throughout life.
Main Methods:
- Flow cytometry was used to analyze T cell subsets in peripheral blood.
- 92 healthy individuals (44 female, 48 male) aged 3-88 years were studied.
- Distribution of CD4+ and CD8+ TSCM and naive T cells was quantified.
Main Results:
- TSCM frequencies remained stable across age and gender.
- Absolute CD8+ TSCM numbers declined with increasing age.
- The ratio of TSCM to naive T cells increased with age.
Conclusions:
- TSCM cells are relatively stable in circulation, supporting their role in long-term immunological memory.
- The increasing TSCM to naive T cell ratio with age suggests a compensatory mechanism for immune decline.
- TSCM cells may play an increasingly important role in maintaining immune function in older individuals.
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