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4 results on '"Descarpentri M"'

1. [Survival of paraganglionic cells of the "SIF cells" type of the superior cervical ganglion of the rat].

Author

Coujard M, Coujard R, Descarpentri M, and Marchi N

Subjects
Animals, Cell Nucleus ultrastructure, Cell Survival, Cytoplasmic Granules, Ganglia, Autonomic immunology, Ganglia, Autonomic ultrastructure, Male, Neurons ultrastructure, Organ Culture Techniques, Paraganglia, Nonchromaffin, Rats, Testis surgery, Transplantation, Autologous, Transplantation, Homologous, Cervical Plexus, Ganglia, Autonomic transplantation
Abstract

A previous organotypic culture of rat's superior ganglion is propitious to the survey of grafts. Neurons keep their own structure for 15 to 18 months. A methodical study of grafts find rather rare or exceptionally frequent paraganglionary cells. These cells (S.I.F. Cells type) can keep their ultrastructural aspect in superior cervical ganglion graft for 15 months and even more.

Published
1975

2. [Radioautographic demonstration of the methods of incorporation of tritiated leucine into germ cells of the testis incubated in a modified Rose chamber].

Author

Dadoune JP, Marchi N, and Descarpentri M

Subjects
Animals, Autoradiography, In Vitro Techniques, Male, Mice, Microscopy, Electron, Spermatozoa ultrastructure, Tritium, Leucine metabolism, Spermatozoa metabolism, Testis metabolism
Abstract

The influence of the blood-testis barrier on the synthetic capabilities of male germ cells in the mouse as investigated by quantitative radioautography in aggregates of seminiferous tubules incubated in a modified Rose chamber, in the presence of tritiated leucine. In the seminiferous tubule, a distribution gradient of radioactivity could be seen : radioactivity decreased from the periphery towards the lumen. Labelling intensity was approximately equivalent in type B spermatogonia and pachytene primary spermatocytes but was only one third as heavy in spermatids (steps 4-5). These results which confirm prior observations carried out in both animal and germ cells isolated from the seminiferous epithelium by differential sedimentation velocity indicate that the blood-testis barrier has no significant effect on the capacity for synthesis peculiar to each germ-cell population.

Published
1980

3. [A comparative study of the neurons of the superior cervical ganglion of the rat maintained in culture with or without subsequent transplantation].

Author

Coujard R, Marchi N, Descarpentri M, and Thomas JA

Subjects
Animals, Animals, Newborn, Culture Techniques, Ganglia, Spinal immunology, Ganglia, Spinal ultrastructure, Golgi Apparatus ultrastructure, Male, Microscopy, Electron, Mitochondria ultrastructure, Neurons immunology, Neurons transplantation, Neurons ultrastructure, Rats, Testis immunology, Time Factors, Transplantation Immunology, Transplantation, Homologous, Ganglia, Autonomic transplantation, Ganglia, Spinal transplantation
Published
1974

4. [Synapses of the superior cervical ganglion of the white rat].

Author

Nouhouayi Y, Coujard R, Descarpentri M, and Marchi N

Subjects
Animals, Axons ultrastructure, Cell Membrane ultrastructure, Dendrites ultrastructure, Female, Male, Neurons ultrastructure, Rats, Ganglia, Sympathetic ultrastructure, Synapses ultrastructure
Abstract

In the complexe system of synapses in the white rat's superior cervical ganglion, authors show the existence of: 1 - somato-somatic neuronal synapses 2 - somatic synapses between S.I.F. cells 3 - recurrent auto-synapses They moreover mention widening of synaptic cleft of the synapses between S.I.F. cells and their processes.

Published
1979

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