The cell junctions of the notochord of Xenopus laevis tadpoles
| Autor: | Wolfgang Honer, Hans Komnick |
|---|---|
| Rok vydání: | 1990 |
| Předmět: |
animal structures
Xenopus Notochord Biology Cell junction Xenopus laevis Lanthanum medicine Animals Freeze Fracturing Intermediate filament Tight junction Hemidesmosome Gap junction Cell Biology General Medicine Anatomy biology.organism_classification Cell biology Microscopy Electron medicine.anatomical_structure Intercellular Junctions Larva Basal lamina Developmental Biology |
| Zdroj: | Tissuecell. 22(2) |
| ISSN: | 0040-8166 |
| Popis: | The cell junctions of the notochord of Xenopus laevis tadpoles were examined with the electron microscope using thin sections, lanthanum tracer experiments, and freeze-fracture replicas. Both the peripheral and vacuolated cells of the notochord are connected by numerous spot desmosomes characterized by an intercellular desmogloea and intermediate filaments on the cytoplasmic sides. The peripheral cells also display numerous hemidesmosomes facing the underlying basal lamina. Staining with rhodamine-phalloidin for F-actin yielded negative results and suggested that adhaerens-type junctions arc absent. Tracer experiments with lanthanum and freeze-fracture replicas clearly revealed the presence of gap junctions between both cell types but no indications of tight junctions were found and no intercellular barrier existed for tracer infiltration of the notochord. |
| Databáze: | OpenAIRE |
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