Expression of inhibitory receptors on CD4+ and CD8+ T cells from healthy Colombian donors
T cell activation involves positive cellular signals that promote effector functions and negative signals that contribute to the regulationof these responses. These regulatory signals are generated upon activation of receptors on T cells that include CD160, 2B4, ProgrammedDeath-1 and CTLA-4. Objecti...
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doaj-d63ee158173b4be091382172608c28662020-11-24T21:07:54ZengPontificia Universidad JaverianaUniversitas Scientiarum0122-74832027-13522012-04-011713542Expression of inhibitory receptors on CD4+ and CD8+ T cells from healthy Colombian donorsAdriana CuéllarPaola LassoT cell activation involves positive cellular signals that promote effector functions and negative signals that contribute to the regulationof these responses. These regulatory signals are generated upon activation of receptors on T cells that include CD160, 2B4, ProgrammedDeath-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 30healthy donors from Bogotá (Colombia) were obtained via Ficoll-Hypaque density gradient and cells were stained with specific conjugatedantibodies previously titrated. Results. The CD160, 2B4, and Programmed Death-1 inhibitory markers were detected on CD4+ T cellswith 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 differencebetween CD4+ (1.56%) and CD8+ (1.53%) T cells. Frequency of CD160/2B4 and CTLA-4/ Programmed Death-1 coexpression was0.18% and 0.09% on CD4+ cells, and 4.02% and 0.2% on CD8+ T cells. Conclusions. This is the first report showing the frequencyof inhibitory receptors such as CD160, 2B4, Programmed Death-1, and CTLA-4 on CD4+ and CD8+ T cells from healthy Colombiandonors. Our findings serve as a baseline for the analysis and comparison of these receptors in Colombian populations with differentdisease conditions.http://revistas.javeriana.edu.co/index.php/scientarium/article/view/2480/1759inhibitory receptorsT cells |
collection |
DOAJ |
language |
English |
format |
Article |
sources |
DOAJ |
author |
Adriana Cuéllar Paola Lasso |
spellingShingle |
Adriana Cuéllar Paola Lasso Expression of inhibitory receptors on CD4+ and CD8+ T cells from healthy Colombian donors Universitas Scientiarum inhibitory receptors T cells |
author_facet |
Adriana Cuéllar Paola Lasso |
author_sort |
Adriana Cuéllar |
title |
Expression of inhibitory receptors on CD4+ and CD8+ T cells from healthy Colombian donors |
title_short |
Expression of inhibitory receptors on CD4+ and CD8+ T cells from healthy Colombian donors |
title_full |
Expression of inhibitory receptors on CD4+ and CD8+ T cells from healthy Colombian donors |
title_fullStr |
Expression of inhibitory receptors on CD4+ and CD8+ T cells from healthy Colombian donors |
title_full_unstemmed |
Expression of inhibitory receptors on CD4+ and CD8+ T cells from healthy Colombian donors |
title_sort |
expression of inhibitory receptors on cd4+ and cd8+ t cells from healthy colombian donors |
publisher |
Pontificia Universidad Javeriana |
series |
Universitas Scientiarum |
issn |
0122-7483 2027-1352 |
publishDate |
2012-04-01 |
description |
T cell activation involves positive cellular signals that promote effector functions and negative signals that contribute to the regulationof these responses. These regulatory signals are generated upon activation of receptors on T cells that include CD160, 2B4, ProgrammedDeath-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 30healthy donors from Bogotá (Colombia) were obtained via Ficoll-Hypaque density gradient and cells were stained with specific conjugatedantibodies previously titrated. Results. The CD160, 2B4, and Programmed Death-1 inhibitory markers were detected on CD4+ T cellswith 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 differencebetween CD4+ (1.56%) and CD8+ (1.53%) T cells. Frequency of CD160/2B4 and CTLA-4/ Programmed Death-1 coexpression was0.18% and 0.09% on CD4+ cells, and 4.02% and 0.2% on CD8+ T cells. Conclusions. This is the first report showing the frequencyof inhibitory receptors such as CD160, 2B4, Programmed Death-1, and CTLA-4 on CD4+ and CD8+ T cells from healthy Colombiandonors. Our findings serve as a baseline for the analysis and comparison of these receptors in Colombian populations with differentdisease conditions. |
topic |
inhibitory receptors T cells |
url |
http://revistas.javeriana.edu.co/index.php/scientarium/article/view/2480/1759 |
work_keys_str_mv |
AT adrianacuellar expressionofinhibitoryreceptorsoncd4andcd8tcellsfromhealthycolombiandonors AT paolalasso expressionofinhibitoryreceptorsoncd4andcd8tcellsfromhealthycolombiandonors |
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1716761649573003264 |