cell junction

(redirected from Junctional complexes)

cell junction

[′sel ¦jəŋk·shen]
(cell and molecular biology)
A specialized site on a cell at which it is attached to another cell or to the extracellular matrix.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.
References in periodicals archive ?
At higher magnification, the plasma membrane of these cells possessed abundant microvillar projections with junctional complexes joining adjacent cells (Figure 4(d)).
TJs and AJs, two pivotal junctional complexes physically located in the ECs, are considered as the main structural components of the barriers.
The basal plasmalemma showed tight junctional complexes with adjacent cell membrane and in certain areas distinct intercellular canaliculi were present between the cells.
Furthermore, the mechanisms that affect adhesion molecules and junctional complexes and their significance in primary sclerosing cholangitis and extrahepatic cholestasis are elucidated.
With his collaborators, Palade described a transport system across the endothelium and identified the so-called Weibel-Palade bodies which play a role in coagulation and inflammation; he also described the neuronal synapses, the tight junctions and junctional complexes in glomerular cells and the secretory pathways of proteins from the endoplasmic reticulum towards the extracellular compartment.
The junctional complexes between follicular cells in the apico-lateral borders were quite distinct with a prominent tight jun ction from which single cilium sometimes projected from it into the luminal colloid (Fig.1D).
Several junctional complexes, including adherens junctions and tight junctions, participate in this process [6].
Electron microscopy has demonstrated intracellular granules (presumably autophagosomes), poorly formed junctional complexes, and occasional long processes with contractile microfilaments.
Electron microscopy often shows the presence of junctional complexes between tumor cells, with or without pericellular basal lamina and cytoplasmic skeins of intermediate filaments.
The upregulation of gap junctional complexes may be regarded as a useful way of informing the chromaffine cells when cholinergic synaptic transmission is absent; they might just as well be nonfunctional for various reasons.