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  • Chick embryo  (1)
  • Differentiation  (1)
  • 1
    Digitale Medien
    Digitale Medien
    Springer
    Cell & tissue research 117 (1971), S. 559-569 
    ISSN: 1432-0878
    Schlagwort(e): Cerebral cortex ; Dissociated cells ; Chick embryo ; Cultivation in vitro ; Influence of substrate
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Biologie , Medizin
    Notizen: Summary Dissociated cells from 7-day old chick embryo cerebral hemispheres were cultivated for one month in Rose chambers. Four different culture conditions were employed in the composition of the matrix on which the cells were cultivated: collagen alone, collagen plus embryonic extract, collagen plus plasma and collagen plus plasma and embryonic extract. Within the first 48 hours of cultivation the cells formed processes under all four culture conditions. In the presence of plasma the dissociated cells remained well isolated; in the other culture conditions many cells reassociated into clumps. After 2–3 weeks in cultures on collagen or collagen plus embryonic extract many polygonal cells developed and formed a layer upon which typical neurons and oligodendrocyte-like cells were observed. After 3 weeks the polygonal cells began to transform into astrocyte-like cells. In the presence of plasma the cell bodies of the neuroblasts remained small and round. The processes developed generally consisted of one long and many short thick fibres; all processes had a bulbous appearance. In 3–4-weeks old cultures the cells which remained viable, were morphologically unchanged. The differences in the morphological aspects of the cells cultivated on plasma and those cultivated on collagen alone or with embryonic extract are discussed.
    Materialart: Digitale Medien
    Bibliothek Standort Signatur Band/Heft/Jahr Verfügbarkeit
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  • 2
    ISSN: 1432-0878
    Schlagwort(e): Glial cells ; Cyclic AMP ; Theophylline ; Differentiation
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Biologie , Medizin
    Notizen: Summary The effects of serum deprivation, of dibutyryl-cyclic AMP (dB-cAMP) and of theophylline on the morphology of cultured new-born rat astroblasts have been studied using Eagle's basal medium (BME) or Eagle's minimum essential medium (MEM) as culture media. Serum deprivation had no effect on cells cultured in BME, while in MEM, deprivation induced a rapid morphological transformation involving the appearance of multiple processes. This phenomenon was rapidly reversible when serum was again added. In serum-supplemented BME, dB-cAMP (1 mM) and theophylline (1 mM) had no effect. In serum-supplemented MEM, theophylline (1 mM) had no effect while dB-cAMP (1 mM) induced a slower and poorly reversible morphological alteration. On the other hand cells in serum-free BME showed multiple processes after addition of dB-cAMP (1 mM) or theophylline (1 mM). This rapid alteration was completely reversed either by removal of dB-cAMP and theophylline or by addition of serum.
    Materialart: Digitale Medien
    Bibliothek Standort Signatur Band/Heft/Jahr Verfügbarkeit
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