CD45 pre-exclusion from the tips of T cell microvilli prior to antigen recognition.
CD45 pre-exclusion from the tips of T cell microvilli prior to antigen recognition.
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抗原识别前T细胞微绒毛顶端的CD45预先排除。
DOI:
10.1038/s41467-021-23792-8
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发表时间:
2021-06-23
影响因子:
16.6
通讯作者:
Ley K
中科院分区:
文献类型:
--
作者:
Jung Y;Wen L;Altman A;Ley K
The tyrosine phosphatase CD45 is a major gatekeeper for restraining T cell activation. Its exclusion from the immunological synapse (IS) is crucial for T cell receptor (TCR) signal transduction. Here, we use expansion super-resolution microscopy to reveal that CD45 is mostly pre-excluded from the tips of microvilli (MV) on primary T cells prior to antigen encounter. This pre-exclusion is diminished by depleting cholesterol or by engineering the transmembrane domain of CD45 to increase its membrane integration length, but is independent of the CD45 extracellular domain. We further show that brief MV-mediated contacts can induce Ca2+ influx in mouse antigen-specific T cells engaged by antigen-pulsed antigen presenting cells (APC). We propose that the scarcity of CD45 phosphatase activity at the tips of MV enables or facilitates TCR triggering from brief T cell-APC contacts before formation of a stable IS, and that these MV-mediated contacts represent the earliest step in the initiation of a T cell adaptive immune response. CD45 limits T cell activation, so its exclusion from the T cell immunological synapse is thought to occur as a means to enable TCR signalling. Here the authors use a variety of cellular imaging methods to show that CD45 is indeed excluded from the tips of the T cell microvilli and that this occurs prior to contact with antigen, indicating this exclusion is one of the initiating factors for antigen presentation and T cell activation.
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DOI:
10.1126/science.1260088
发表时间:
2015-01-30
期刊:
Science (New York, N.Y.)
影响因子:
--
作者:
Chen F;Tillberg PW;Boyden ES
通讯作者:
Boyden ES
影响因子:
30.5
作者:
Chang VT;Fernandes RA;Ganzinger KA;Lee SF;Siebold C;McColl J;Jönsson P;Palayret M;Harlos K;Coles CH;Jones EY;Lui Y;Huang E;Gilbert RJC;Klenerman D;Aricescu AR;Davis SJ
通讯作者:
Davis SJ
影响因子:
20.3
作者:
Cordoba, Shaun-Paul;Choudhuri, Kaushik;van der Merwe, P. Anton
通讯作者:
van der Merwe, P. Anton
影响因子:
4.4
作者:
Greicius, G;Westerberg, L;Severinson, E
通讯作者:
Severinson, E
影响因子:
3.4
作者:
Dietrich, C;Bagatolli, LA;Gratton, E
通讯作者:
Gratton, E