Neural Tube (Canal) Morphogenesis in Notochordless Amphibian (Xenopus Laevis) Embryos

1983 ◽  
Vol 174 (3) ◽  
pp. 316-321 ◽  
Author(s):  
G. M. Malacinski ◽  
B. W. Youn
Keyword(s):  
Xenopus Laevis ◽  
Neural Tube ◽  
Xenopus Laevis Embryos

Development and characterization of commissural interneurones in the spinal cord of Xenopus laevis embryos revealed by antibodies to glycine

Development ◽  
1988 ◽  
Vol 103 (3) ◽  
pp. 447-461 ◽  
Author(s):  
A. Roberts ◽  
N. Dale ◽  
O.P. Ottersen ◽  
J. Storm-Mathisen
Keyword(s):  
Spinal Cord ◽  
Xenopus Laevis ◽  
Neural Tube ◽  
Detailed Comparison ◽  
Neural Tube Closure ◽  
Spinal Interneurones ◽  
Inhibitory Function ◽  
Process Formation ◽  
Xenopus Laevis Embryos

By using an antibody to glutaraldehyde fixation products of glycine we have been able to observe the development of a defined population of spinal interneurones in the CNS of Xenopus laevis embryos. The first glycine immunoreactive (GLY) somata appeared at stage 22 in the caudal hindbrain within a few hours of neural tube closure. The population then increased by extending caudally into the spinal cord and by infill. It was followed up to the time of hatching, stage 37/38. By observing GLY cells at early stages in their differentiation, the normal sequence of cell process formation was deduced. A ventral axon is formed, extends dendrites laterally into the marginal zone and forms a commissure by growing through the ventral ependymal cell floor of the neural tube. On the opposite side, growth cones turn longitudinally and TEM observations show that they make en-passant synaptic contacts. All GLY cells have decussating axons and some grow secondary axons on the same side as the soma. To establish the identity of GLY cells, a detailed comparison was made with commissural and dorsolateral commissural interneurones defined by retrograde and intracellular HRP staining. The GLY cells are identified with the commissural interneurones which are known to serve a glycinergic reciprocal inhibitory function. By showing that these interneurones have a clearly defined group identity and programme of development, this study opens the way to further experiments on factors controlling spinal cord pathway determination.

Neural Fold Fusion in Xenopus Laevis Embryos

1974 ◽  
Vol 32 ◽  
pp. 282-283
Author(s):  
Linda L. Mak
Keyword(s):  
Electron Microscopy ◽  
Xenopus Laevis ◽  
Neural Tube ◽  
Morphological Study ◽  
Xenopus Laevis Embryos

A morphological study of neural fold fusion in neurulae of the African Clawed Toad Xenopus laevis was undertaken. Segments of neural folds were dissected from embryos at Nieuwkoop and Faber stages 18 (neural groove), 19 (neural fold fusion) and 20 (neural tube) and fixed for electron microscopy.Cells from specimens in the prefusion stage exhibited much vesicular activity, especially those lining the neural groove. In certain instances the vesicles were open, extruding organelles and cytoplasm into the neural groove. The membranous projections of these opened vesicles protruded into the extraembryonic space. Vesicles (v, Fig. 1) were arranged in rows below the surfaces of cells lying along the neural groove. Some vesicles appeared to coalesce to form larger ones.

scholarly journals Iron nanoparticle bio-interactions evaluated in Xenopus laevis embryos, a model for studying the safety of ingested nanoparticles

2019 ◽  
Vol 14 (2) ◽  
pp. 196-213
Author(s):  
Patrizia Bonfanti ◽  
Anita Colombo ◽  
Melissa Saibene ◽  
Luisa Fiandra ◽  
Ilaria Armenia ◽  
...  
Keyword(s):  
Xenopus Laevis ◽  
Iron Nanoparticle ◽  
Xenopus Laevis Embryos ◽  
Ingested Nanoparticles

Neural-inducing activity of nuclei and nuclear fractions from Xenopus laevis embryos

1986 ◽  
Vol 195 (2) ◽  
pp. 123-127 ◽  
Author(s):  
G�nther Bretzel ◽  
Hildegard Tiedemann
Keyword(s):  
Xenopus Laevis ◽  
Xenopus Laevis Embryos

Teratogenic effects of five anticancer drugs on Xenopus laevis embryos

2016 ◽  
Vol 133 ◽  
pp. 90-96 ◽  
Author(s):  
Marina Isidori ◽  
Concetta Piscitelli ◽  
Chiara Russo ◽  
Marie Smutná ◽  
Luděk Bláha
Keyword(s):  
Xenopus Laevis ◽  
Anticancer Drugs ◽  
Teratogenic Effects ◽  
Xenopus Laevis Embryos

Fission yeast tmsl protein abrogates normal development in Xenopus laevis embryos

1995 ◽  
Vol 204 (3) ◽  
pp. 198-202 ◽  
Author(s):  
Peter Wagner ◽  
Michael Hoever ◽  
Katrin Appel ◽  
Walter Kn�chel ◽  
Mathias Montenarh
Keyword(s):  
Xenopus Laevis ◽  
Fission Yeast ◽  
Normal Development ◽  
Xenopus Laevis Embryos
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