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Updated: Jan 3, 2026
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Mouse Naïve CD4+ T Cell Isolation and In vitro Differentiation into T Cell Subsets
Published on: April 16, 2015
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CXCR3 Identifies Human Naive CD8+ T Cells with Enhanced Effector Differentiation Potential
Gabriele De Simone1, Emilia M C Mazza1, Antonino Cassotta2,3
1Laboratory of Translational Immunology, Humanitas Clinical and Research Center, 20089 Rozzano, Milan, Italy.
Journal of Immunology (Baltimore, Md. : 1950)
|November 20, 2019
Summary
Human CD8+ T cells show distinct subsets, with CXCR3+ naive T cells exhibiting effector-like properties and enhanced antigen interactions. This suggests pre-existing T cell receptor diversity shapes immune responses.
Area of Science:
- Immunology
- Cellular Biology
Background:
- Naive T (TN) cell effector response in mice correlates with TCR sensitivity to self-antigens, measured by CD5 expression.
- Similar human studies were previously lacking.
Purpose of the Study:
- To investigate heterogeneity in human CD8+ TN cells.
- To determine if human TN cells exhibit distinct subsets with varying effector potentials.
Main Methods:
- Identification and characterization of human CD8+ TN cell subsets based on CXCR3 expression.
- Analysis of transcriptional profiles, TCR physicochemical characteristics, cytokine production (IL-2, TNF), and in vitro differentiation capacity.
- Comparative analysis with murine TN cells.
Main Results:
- Two human CD8+ TN cell subsets were identified: CXCR3-negative and CXCR3-positive.
- CXCR3+ TN cells showed an effector-like transcriptional profile and enhanced interactions with peptide-HLA class I antigens.
- CXCR3+ TN cells produced IL-2 and TNF upon activation and differentiated readily into effector cells.
- Human CXCR3+ TN cells were transcriptionally similar to murine CXCR3+ TN cells.
Conclusions:
- Human CD8+ TN cell heterogeneity exists, defined by CXCR3 expression.
- CXCR3+ TN cells possess pre-effector characteristics, suggesting a role in shaping immune responses.
- Findings support the concept that pre-existing T cell receptor repertoire diversity influences effector differentiation.
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