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Título: | Analysis of centrosomal area actin reorganization and centrosome polarization upon lymphocyte activation at the immunological synapse |
Autor: | Fernández-Hermira, Sara; Sanz-Fernández, Irene; Botas, Marta CSIC; Calvo, Victor CSIC ORCID; Izquierdo, Manuel CSIC ORCID | Palabras clave: | Actin cytoskeleton; B lymphocytes; Centrosome; Fluorescence microscopy; Image analyses; Immunological synapse; NK cells; Secretory vesicles; T lymphocytes | Fecha de publicación: | 2023 | Resumen: | T cell receptor (TCR) and B cell receptor (BCR) stimulation of T and B lymphocytes, by antigen presented on an antigen-presenting cell (APC) induces the formation of the immunological synapse (IS). IS formation is associated with an initial increase in cortical filamentous actin (F-actin) at the IS, followed by a decrease in F-actin density at the central region of the IS, which contains the secretory domain. This is followed by the convergence of secretion vesicles towards the centrosome, and the polarization of the centrosome to the IS. These reversible, cortical actin cytoskeleton reorganization processes occur during lytic granule secretion in cytotoxic T lymphocytes (CTL) and natural killer (NK) cells, proteolytic granules secretion in B lymphocytes and during cytokine-containing vesicle secretion in T-helper (Th) lymphocytes. In addition, several findings obtained in T and B lymphocytes forming IS show that actin cytoskeleton reorganization also occurs at the centrosomal area. F-actin reduction at the centrosomal area appears to be associated with centrosome polarization. In this chapter we deal with the analysis of centrosomal area F-actin reorganization, as well as the centrosome polarization analysis toward the IS. | URI: | http://hdl.handle.net/10261/347567 | DOI: | 10.1016/bs.mcb.2021.11.002 | ISBN: | 9780323901543 | ISSN: | 0091-679X |
Aparece en las colecciones: | (IIBM) Artículos |
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