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Deprecated: Implicit conversion from float 235.6 to int loses precision in C:\Inetpub\vhosts\kidney.de\httpdocs\pget.php on line 534 J+Cell+Sci 2017 ; 130 (1): 143-51 Nephropedia Template TP
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Cell polarity defines three distinct domains in pancreatic ?-cells #MMPMID26919978
Gan WJ; Zavortink M; Ludick C; Templin R; Webb R; Webb R; Ma W; Poronnik P; Parton RG; Gaisano HY; Shewan AM; Thorn P
J Cell Sci 2017[Jan]; 130 (1): 143-51 PMID26919978show ga
The structural organisation of pancreatic ?-cells in the islets of Langerhans is relatively unknown. Here, using three-dimensional (3D) two-photon, 3D confocal and 3D block-face serial electron microscopy, we demonstrate a consistent in situ polarisation of ?-cells and define three distinct cell surface domains. An apical domain located at the vascular apogee of ?-cells, defined by the location of PAR-3 (also known as PARD3) and ZO-1 (also known as TJP1), delineates an extracellular space into which adjacent ?-cells project their primary cilia. A separate lateral domain, is enriched in scribble and Dlg, and colocalises with E-cadherin and GLUT2 (also known as SLC2A2). Finally, a distinct basal domain, where the ?-cells contact the islet vasculature, is enriched in synaptic scaffold proteins such as liprin. This 3D analysis of ?-cells within intact islets, and the definition of distinct domains, provides new insights into understanding ?-cell structure and function.