Characteristics of T-cell receptor Valpha24JalphaQ T cells, a human counterpart of murine NK1 T cells, from normal subjects
Summary
This summary is machine-generated.Human double-negative (DN) Valpha24JalphaQ T cells are a counterpart to mouse NK1(+) T cells. These DN T cells express NK markers and produce IL-4, suggesting a regulatory role in autoimmune responses.
Area Of Science
- Immunology
- T cell biology
- Autoimmunity
Background
- Natural Killer (NK) T cells are specialized T cells with unique T cell receptor (TCR) and NK markers.
- Murine NK1(+) T cells are known for rapid IL-4 production and regulatory functions.
Purpose Of The Study
- Investigate the distribution of invariant TCR Valpha24JalphaQ T cells in human CD4(-)CD8(-) double-negative (DN) and CD4(+) T cell populations.
- Characterize the NK phenotypes and IL-4 production of human Valpha24JalphaQ T cells.
Main Methods
- Three-color Fluorescence-Activated Cell Sorting (FACS) analysis to determine T cell frequencies.
- Sequencing to identify Valpha24JalphaQ rearrangement in specific T cell populations.
- In vitro stimulation assays to assess IL-4 mRNA expression.
Main Results
- Human DN Valpha24JalphaQ T cells constitute a major population of DN T cells, unlike CD4(+) T cells.
- These DN T cells express NK cell surface receptors NKR-P1A and CD56.
- DN Valpha24JalphaQ T cells rapidly produce IL-4 mRNA upon stimulation.
Conclusions
- Human DN Valpha24JalphaQ T cells are phenotypically and functionally similar to murine NK1(+) T cells.
- DN Valpha24JalphaQ T cells are identified as the human counterpart of murine NK1(+) T cells.
- These findings suggest a potential regulatory role for human DN Valpha24JalphaQ T cells in autoimmune responses.
View abstract on PubMed