Epithelium migration

The AM may well be able to penetrate the alveolar epithelium, migrating to hilar lymph nodes (87,119,120). BAL in dogs at times long after particle inhalation (121-124) showed that more than 90% of the retained particles on the alveolar epithelium were phagocytosed by AM. Because this fraction dominated the pool from which particles were translocated through the alveolar epithelial... 

Jia C. and Halpem M. (1998). Neurogensis and migration of receptor neurons in the vomeronasal sensory epithelium of the Opossum Monodelphis domestica. J Comp Neurol 400, 287-297. 

Martinez-Marcos A., Ubeda-Banon I. and Halpem M. (2000). Cell turnover in the vomeronasal epithelium evidence for differential migration and maturation of subclasses of vomeronasal neurons in the adult opossum. J Neurobiol 43, 50-63. 

The superficial cells are irregular arrays of polygonal cells with a diameter of 40-60 pm and a thickness of 2-6 pm each. These cells, the most differentiated cells of the epithelium, possess microvilli in their apical surfaces, which are covered with a glycocalyx. It is, however, controversial whether mucus exists on their surface [58,59], As cell division occurs in the basal cells of the cornea, the daughter cells move toward the surface while becoming more differentiated. As the daughter cells migrate toward the outermost layer, the superficial cells are... 

In summary, the in vivo protective effects of Tyv-specific antibodies, exclusion and immobility, can now be effectively studied using an in vitro model of the intestinal epithelium. Larvae are prevented from entering epithelial cells by caps of immune complexes or by binding of antibody to Tyv in the absence of immune complex formation. These effects would correlate with exclusion of larvae from epitheha observed in passively immunized rats. Larvae are encumbered as they migrate within epithelial monolayers, an effect that may correlate with immobility of larvae observed in vivo. It is reasonable to conclude that in the animal host the different effects work in combination, most iikeiy in cooperation with innate host defences, to cause nematode expuision from the intestine. 

The neural tube is a pseudostratified epithelium, with cells extending between the apical and basal surfaces of the epithelial wall. The neuroepithelium contains undifferentiated populations of stem cells and radial glia (see Ch. 29). With time, both of these cell types give rise to the three main lineages for neurons, astrocytes and oligodendrocytes. After the final mitotic division, neurons migrate away from the ventricular surface of the neural... 

Particles deposited on or in the lung parenchyma are cleared primarily by alveolar macrophages. These phagocytized particles migrate to the ciliated epithelium or to the... 

Rosen EM, Meromsky L, Setter E et al (1990) Quantitation of cytokine-stimulated migration of endothelium and epithelium by a new assay using microcarrier beads. Exp Cell Res 186 22-31... 

After induction, two events occur condensation of the mesenchyme around the ureteric bud, and transformation of the mesenchyme into epithelium. In order for condensation into a comma-shaped mass to occur, there has to be induction of a critical mass of cells, not all of which appear to be in contact with the ureteric bud. There appears to be some short-range signalling in the mesenchyme involving the secreted glycoprotein WNT-4. Mice lacking WNT-4 fail to form pretubular aggregates (as do PAX-2 knockouts). There also appears to be migration of induced cells away from direct contact with the ureteric bud, often several cell diameters distant. This may permit uninduced cells to contact the ureteric bud. 

Used for ocular bums as soon as 1947 by Sorsby [30], the amniotic membrane is a tissue located at the interface of the placenta and the amniotic fluid. It is constituted of an unstratifled epithelium, a basement lamina, and an avascular mesenchyma. The amniotic membrane facilitates the reepithelialization by reducing the inflammatory and cicatricial reaction [31]. It helps the migration of the epithelial cells and the adhesion of the basement cells [32]. It behaves as an actual replacing basement membrane and facilitates the phenotypic... 

Bennett, C.E. (1975) Fasciola hepatica development of the caecal epithelium during migration in the mouse. Experimental Parasitology 37, 426-441. 

Concerning the source of calcium, cytochernica studies on its distribution in the mantle epithelium are quite revealing306. It appears that calcium is present in free and combined forms. Free calcium migrates from the endoplasmic reticulum... 

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