Role of Actin Cytoskeleton Reorganization in Polarized Secretory Traffic at the Immunological Synapse.

Role of Actin Cytoskeleton Reorganization in Polarized Secretory Traffic at the Immunological Synapse.
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DOI:
10.3389/fcell.2021.629097
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发表时间:
2021
影响因子:
5.5
通讯作者:
Izquierdo M
Izquierdo M
中科院分区:
生物学2区
文献类型:
--
作者:
Calvo V;Izquierdo M

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T cell receptor (TCR) and B cell receptor (BCR) stimulation by antigen presented on an antigen-presenting cell (APC) induces the formation of the immune synapse (IS), the convergence of secretory vesicles from T and B lymphocytes toward the centrosome, and the polarization of the centrosome to the immune synapse. Immune synapse formation is associated with an initial increase in cortical F-actin at the synapse, followed by a decrease in F-actin density at the central region of the immune synapse, which contains the secretory domain. These reversible, actin cytoskeleton reorganization processes occur during lytic granule degranulation in cytotoxic T lymphocytes (CTL) and cytokine-containing vesicle secretion in T-helper (Th) lymphocytes. Recent evidences obtained in T and B lymphocytes forming synapses show that F-actin reorganization also occurs at the centrosomal area. F-actin reduction at the centrosomal area appears to be involved in centrosome polarization. In this review we deal with the biological significance of both cortical and centrosomal area F-actin reorganization and some of the derived biological consequences.
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