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Updated: May 18, 2026

qKAT: Quantitative Semi-automated Typing of Killer-cell Immunoglobulin-like Receptor Genes
Published on: March 6, 2019
CD8 T cells express randomly selected KIRs with distinct specificities compared with NK cells
Niklas K Björkström1, Vivien Béziat, Frank Cichocki
1Center for Infectious Medicine, Department of Medicine, Karolinska Institutet, Karolinska University Hospital Huddinge, Stockholm, Sweden. niklas.bjorkstrom@ki.se
Killer cell immunoglobulin-like receptors (KIRs) on CD8 T cells show restricted expression patterns, often dominated by a single receptor. KIR expression on CD8 T cells is independent of HLA ligands and distinct from natural killer cells.
Area of Science:
- Immunology
- Cellular immunology
- T cell biology
Background:
- Killer cell immunoglobulin-like receptors (KIRs) interact with HLA class I ligands, influencing immunity and disease.
- CD8 T cells acquire KIRs during maturation, but their repertoire composition is poorly understood.
Purpose of the Study:
- To analyze the high-resolution KIR expression on human CD8 T cells.
- To understand the regulation and specificity of KIRs on CD8 T cells.
Main Methods:
- High-resolution analysis of KIR expression on human CD8 T cells.
- Investigated KIR expression independence from self-HLA class I ligands.
- Compared KIR specificity on CD8 T cells versus natural killer cells.
Main Results:
- Most CD8 T cells exhibit restricted KIR expression, frequently with a single KIR.
- KIR expression and function modulation on CD8 T cells are independent of self-HLA class I ligands.
- Inhibitory KIR specificity on CD8 T cells differs from that on natural killer cells, despite similar promoter regulation.
Conclusions:
- KIR repertoires on CD8 T cells are restricted and distinct from those on NK cells.
- KIR expression on CD8 T cells is regulated independently of HLA ligand expression.
- Provides novel insights into KIR repertoire formation on human T cells.
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