| Autor: |
Sensenbrenner, M., Treska-Ciesielski, J., Lodin, Z., Mandel, P. |
| Zdroj: |
Zeitschrift Für Zellforschung und Mikroskopische Anatomie; 1970, Vol. 106 Issue 4, p615-626, 12p |
| Abstrakt: |
Dissociated cells from 9, 12 and 15 day-old chick embryo spinal ganglia were cultivated in presence of total embryo-extract, brain embryo extract, or total embryo extract supplemented with purified nerve growth factor ( NGF). The cells were maintained during 4 days in Maximow assembly and during 1 month in Rose chamber. Neurons showed growth of nerve fibres. The non-neural cells evolved to spindle cells, Schwann cells, or fibroblasts. Ribonucleic acid ( RNA) synthesis was followed with tritiated uridine by autoradiography. Some nerve cells showed tritiated uridine incorporation. The highest incorporations for short-term cultures were at 15 hours in presence of NGF, at 48 hours in presence of total or brain extract, and for long-term cultures at 8 days. These periods corresponded to the highest growing activity of the nerve fibres. After 4 days all the non-neural cells incorporated tritiated uridine. The tritiated uridine was first incorporated into the RNA of the nucleus and, afterwards was found also in the cytoplasm. The presence of brain extract or of NGF stimulates the incorporation of labelled uridine into RNA. No labelling was found in the nerve fibres, even after 4 hours incubation. [ABSTRACT FROM AUTHOR] |
| Databáze: |
Complementary Index |
| Externí odkaz: |
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