T cells can use either T cell receptor or CD28 receptors to absorb and internalize cell surface molecules derived from antigen-presenting cells.

T cells can use either T cell receptor or CD28 receptors to absorb and internalize cell surface molecules derived from antigen-presenting cells.
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DOI:
10.1084/jem.191.7.1137
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发表时间:
2000-04-03
期刊:
The Journal of experimental medicine
影响因子:
--
通讯作者:
Sprent J
Sprent J
中科院分区:
其他
文献类型:
--
作者:
Hwang I;Huang JF;Kishimoto H;Brunmark A;Peterson PA;Jackson MR;Surh CD;Cai Z;Sprent J

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在T细胞与抗原提呈细胞(APC)的接触部位,T细胞受体(TCR)-主要组织相容性复合体(MHC)的相互作用因其他分子之间的相互作用而增强,特别是CD28和T细胞上的淋巴细胞功能相关抗原1(LFA-1)分别与B7(B7-1和B7-2)以及APC上的细胞内黏附分子1(ICAM-1)相互作用。在这里,我们展示了在T细胞与APC相互作用的过程中,T细胞迅速地将APC中的各种分子吸收到细胞膜上,然后内化这些分子。这一过程至少由T细胞上的两个受体决定,即CD28和TCR分子。T细胞摄取APC分子的生物学意义尚不清楚。一种可能性是,这一过程可能允许激活的T细胞从一个APC自由移动到另一个,最终进入循环。
At the site of contact between T cells and antigen-presenting cells (APCs), T cell receptor (TCR)–peptide–major histocompatibility complex (MHC) interaction is intensified by interactions between other molecules, notably by CD28 and lymphocyte function-associated antigen 1 (LFA-1) on T cells interacting with B7 (B7-1 and B7-2), and intracellular adhesion molecule 1 (ICAM-1), respectively, on APCs. Here, we show that during T cell–APC interaction, T cells rapidly absorb various molecules from APCs onto the cell membrane and then internalize these molecules. This process is dictated by at least two receptors on T cells, namely CD28 and TCR molecules. The biological significance of T cell uptake of molecules from APCs is unclear. One possibility is that this process may allow activated T cells to move freely from one APC to another and eventually gain entry into the circulation.
T细胞重新进入成人胸腺,仅限于活化的T细胞。
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