Published Jan 1, 2012


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Alejandra Rico- Lombana Rico- Lombana

Jose Mateus

Paola Lasso

John Mario González

Concepción Judith Puerta

Adriana Cuéllar



T cell activation involves positive cellular signals that promote effector functions and negative signals that contribute to the regulation of these responses. These regulatory signals are generated upon activation of receptors on T cells that include CD160, 2B4, Programmed Death-1 and CTLA-4. Objective. To evaluate the expression of inhibitory receptors like CD160, 2B4, Programmed Death-1 and CTLA-4 on CD4+ and CD8+ T cells from healthy Colombian donors. Materials and methods. Peripheral blood mononuclear cells from 30 healthy donors from Bogotá (Colombia) were obtained via Ficoll-Hypaque density gradient and cells were stained with specific conjugated antibodies previously titrated. Results. The CD160, 2B4, and Programmed Death-1 inhibitory markers were detected on CD4+ T cells
with expression levels of 0.35%, 1.04%, and 1.35%, respectively. On CD8+ T cells, these markers were expressed at higher levels: 16%, 8.97%, and 4.3%, respectively. In contrast to the other receptors, CTLA-4 frequency of expression showed no significant difference between CD4+ (1.56%) and CD8+ (1.53%) T cells. Frequency of CD160/2B4 and CTLA-4/ Programmed Death-1 coexpression was 0.18% and 0.09% on CD4+ cells, and 4.02% and 0.2% on CD8+ T cells. Conclusions. This is the first report showing the frequency of inhibitory receptors such as CD160, 2B4, Programmed Death-1, and CTLA-4 on CD4+ and CD8+ T cells from healthy Colombian donors. Our findings serve as a baseline for the analysis and comparison of these receptors in Colombian populations with different disease conditions.

Key words: inhibitory receptors, T cells


inhibitory receptors, T cells

How to Cite
Rico- Lombana, A. R.-. L., Mateus, J., Lasso, P., González, J. M., Puerta, C. J., & Cuéllar, A. (2012). Expression of inhibitory receptors on CD4+ and CD8+ T cells from healthy Colombian donors. Universitas Scientiarum, 17(1), 35–42.
Cell Biology, Physiology, Morphology

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