期刊
PFLUGERS ARCHIV-EUROPEAN JOURNAL OF PHYSIOLOGY
卷 470, 期 1, 页码 181-186出版社
SPRINGER HEIDELBERG
DOI: 10.1007/s00424-017-2040-9
关键词
Chromaffin granules; F-actin; Myosin II; Myosin V; Neurosecretory cells; Exocytosis
类别
资金
- Spanish Ministry of Economy and Competitiveness (MEC, Fondos FEDER) [BFU2015-63684-P]
Actin is one of the most ubiquitous protein playing fundamental roles in a variety of cellular processes. Since early in the 1980s, it was evident that filamentous actin (F-actin) formed a peripheral cortical barrier that prevented vesicles to access secretory sites in chromaffin cells in culture. Later, around 2000, it was described that the F-actin structure accomplishes a dual role serving both vesicle transport and retentive purposes and undergoing dynamic transient changes during cell stimulation. The complex role of the F-actin cytoskeleton in neuroendocrine secretion was further evidenced when it has been proved to participate in the scaffold structure holding together the secretory machinery at active sites and participate in the generation of mechanical forces that drive the opening of the fusion pore, during the first decade of the present century. The complex vision of the multiple roles of F-actin in secretion we have acquired to date comes largely from studies performed on traditional 2D cultures of primary cells; however, recent evidences suggest that these may not accurately mimic the 3D in vivo environment, and thus, more work is now needed on adrenomedullary cells kept in a more native configuration to fully understand the role of F-actin in regulating chromaffin granule transport and secretion under physiological conditions.
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