Cell surface specializations and intercellular junctions in human amniotic epithelium: An electron microscopic and freeze-fracture study

1982 ◽  
Vol 203 (1) ◽  
pp. 73-82 ◽  
Author(s):  
Barry F. King
Keyword(s):  
Cell Surface ◽  
Freeze Fracture ◽  
Intercellular Junctions ◽  
Electron Microscopic ◽  
Amniotic Epithelium ◽  
Fracture Study

Freeze-fracture study of the vestibular hair cell surface during development

1986 ◽  
Vol 175 (1) ◽  
pp. 69-76 ◽  
Author(s):  
Daniel Favre ◽  
Dan Bagger-Sj�b�ck ◽  
Joseph-Pascal Mbiene ◽  
Alain Sans
Keyword(s):  
Cell Surface ◽  
Hair Cell ◽  
Freeze Fracture ◽  
Fracture Study

Freeze-fracture study of adenovirus-induced KB cell surface alterations

1979 ◽  
Vol 124 (1) ◽  
pp. 139-150 ◽  
Author(s):  
Bernadette Hennache ◽  
Gérard Torpier ◽  
Pierre Boulanger
Keyword(s):  
Cell Surface ◽  
Freeze Fracture ◽  
Fracture Study

scholarly journals Dynamic changes of the luminal plasmalemma in stimulated parotid acinar cells. A freeze-fracture study.

1976 ◽  
Vol 70 (1) ◽  
pp. 59-74 ◽  
Author(s):  
P De Camilli ◽  
D Peluchetti ◽  
J Meldolesi
Keyword(s):  
Cell Surface ◽  
Particle Density ◽  
Freeze Fracture ◽  
Acinar Cells ◽  
Specific Information ◽  
Secretory Cycle ◽  
Granule Membrane ◽  
Fracture Study ◽  
Original Size ◽  
Rat Parotid

In the acinar cells of the rat parotid gland the two membranes participating in exocytosis, i.e., the luminal plasmalemma and the secretory granule membrane, are clearly distinguishable in freeze-fracture because of their different densities in particles. In order to obtain point-specific information about the fusion-fission of these two membranes that occurs during the secretory cycle, glands were studied at various times (5 min to 6 h) after stimulation with isoproterenol. We observed that, in the course of the release of secretion products and shortly afterwards, the enlarged luminal plasmalemma exhibits a mosaic organization consisting of an alternation of membrane patches of high (original plasmalemma) and low (fused granule membrane) particle density. The transition between these two patterns is usually sharp. Later, concomitant with the reformation of acinar canaliculi, the low particle density membrane is found at the cell surface but only bounding vacuolar infoldings, and then it finally disappears. These results suggest that (a) fusion of these membranes does not result in a random intermixing of the molecular components of the participating membranes, which retain their structural identity; and (b) the enlarged luminal plasmalemma reverts to its original size by a progressive, specific removal of the regions of low particle density from the cell surface.

Sign in / Sign up

Export Citation Format

Share Document