Related Experiment Videos
V beta gene repertoire in the aging mouse: a developmental perspective
R González-Quintial1, R Baccalà, R S Balderas
1Scripps Research Institute, Department of Immunology, La Jolla, California, USA.
International Reviews of Immunology
|January 1, 1995
Summary
Age-associated immune changes are not due to major shifts in the T-cell receptor (TCR) repertoire. Immune system function remains stable with age, despite some minor modifications in TCR V beta gene expression.
Area of Science:
- Immunology
- Molecular Biology
- Aging Research
Background:
- The aging immune system exhibits functional alterations.
- Understanding molecular changes in T-cell receptor (TCR) gene expression is crucial for defining age-associated immune shifts.
Purpose of the Study:
- To investigate age-associated changes in TCR V beta gene expression patterns in mice.
- To determine the impact of aging on immune system regulation at the molecular level.
Main Methods:
- Analysis of TCR V beta gene expression patterns across different age groups in mice (fetal, neonatal, adult, advanced).
- Utilized bone marrow transplantation and other studies to assess thymus function.
- Investigated clonal deletions mediated by endogenous superantigens.
Main Results:
- TCR V beta gene rearrangement showed no chromosomal preference.
- Endogenous superantigen-mediated clonal deletions were first observed neonatally and persisted throughout life.
- The involuted thymus retained its capacity for positive and negative selection.
- Overall TCR V beta repertoires were stable in aged mice, with minor expression changes in some V beta subsets linked to CD8 cells and antigenic stimulation.
Conclusions:
- Age-associated immune alterations are not driven by profound changes in the overall TCR repertoire.
- Immune function stability is maintained with age, with minor repertoire modifications potentially due to antigenic stimulation.