The dendritic cell cytoskeleton promotes T cell adhesion and activation by constraining ICAM-1 mobility.
The dendritic cell cytoskeleton promotes T cell adhesion and activation by constraining ICAM-1 mobility.
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DOI:
10.1083/jcb.201406120
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发表时间:
2015-02-16
期刊:
影响因子:
--
通讯作者:
Burkhardt JK
中科院分区:
文献类型:
--
作者:
Comrie WA;Li S;Boyle S;Burkhardt JK
The actin-binding proteins moesin and α-actinin-1 limit the lateral mobility and clustering of ICAM-1 in dendritic cells and thereby promote antigen-dependent conjugate formation and T cell priming. Integrity of the dendritic cell (DC) actin cytoskeleton is essential for T cell priming, but the underlying mechanisms are poorly understood. We show that the DC F-actin network regulates the lateral mobility of intracellular cell adhesion molecule 1 (ICAM-1), but not MHCII. ICAM-1 mobility and clustering are regulated by maturation-induced changes in the expression and activation of moesin and α-actinin-1, which associate with actin filaments and the ICAM-1 cytoplasmic domain. Constrained ICAM-1 mobility is important for DC function, as DCs expressing a high-mobility ICAM-1 mutant lacking the cytoplasmic domain exhibit diminished antigen-dependent conjugate formation and T cell priming. These defects are associated with inefficient induction of leukocyte functional antigen 1 (LFA-1) affinity maturation, which is consistent with a model in which constrained ICAM-1 mobility opposes forces on LFA-1 exerted by the T cell cytoskeleton, whereas ICAM-1 clustering enhances valency and further promotes ligand-dependent LFA-1 activation. Our results reveal an important new mechanism through which the DC cytoskeleton regulates receptor activation at the immunological synapse.
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影响因子:
5.4
作者:
Brossard, C;Feuillet, V;Trautmann, A
通讯作者:
Trautmann, A
DOI:
10.4049/jimmunol.1003102
发表时间:
2011-04-15
期刊:
Journal of immunology (Baltimore, Md. : 1950)
影响因子:
--
作者:
Dehring DA;Clarke F;Ricart BG;Huang Y;Gomez TS;Williamson EK;Hammer DA;Billadeau DD;Argon Y;Burkhardt JK
通讯作者:
Burkhardt JK
DOI:
10.1083/jcb.200112126
发表时间:
2002-06-24
期刊:
The Journal of cell biology
影响因子:
--
作者:
Barreiro O;Yanez-Mo M;Serrador JM;Montoya MC;Vicente-Manzanares M;Tejedor R;Furthmayr H;Sanchez-Madrid F
通讯作者:
Sanchez-Madrid F
DOI:
10.1083/jcb.201406121
发表时间:
2015-02-16
期刊:
The Journal of cell biology
影响因子:
--
作者:
Comrie WA;Babich A;Burkhardt JK
通讯作者:
Burkhardt JK
DOI:
10.1083/jcb.201201018
发表时间:
2012-06-11
期刊:
The Journal of cell biology
影响因子:
--
作者:
Babich A;Li S;O'Connor RS;Milone MC;Freedman BD;Burkhardt JK
通讯作者:
Burkhardt JK