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The effects of laminin on the characteristics and differentiation of neuronal cells from epidermal growth factor-responsive neuroepithelial cells
Yonsei Medical Journal ; : 130-140, 1998.
Article in English | WPRIM | ID: wpr-151199
ABSTRACT
Many extracellular matrix molecules are expressed in the embryonic nervous system and there is some evidence that they are important regulators of neural development. Of these molecules, laminin appears to be the most potent, affecting virtually all neurons of the peripheral and central nervous system. This study was undertaken to investigate the effects of laminin on the proliferation and differentiation of cultured neuroepithelial cells taken from fetal rat forebrains (embryonic day 17-19). The results are summarized as follows. 1) Neuroepithelial cells cultivated in epidermal growth factors containing serum-free medium subsequently differentiated into neurons, astrocytes, and oligodendrocytes. 2) Neuronal cells derived from neuroepithelial cells were immunoreactive for gamma-aminobutyric acid (GABA) or substance P, but were not for serotonin and tyrosine hydroxylase. 3) In western blot analysis, the phosphorylated neurofilament content in neuronal cells was higher in culture on laminin than in culture on poly-L-lysine (PLL). 4) The proliferation rate of GABAergic neurons was higher in culture on laminin than in culture on PLL. These results suggest that GABAergic and substance P-ergic neurons can be differentiated from neuroepithelial cells and that laminin promotes the differentiation of neuronal cells from neuroepithelial cells and the increased proliferation rate of GABAergic cells.
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Full text: Available Index: WPRIM (Western Pacific) Main subject: Rats / Brain / Cell Differentiation / Cell Division / Cells, Cultured / Laminin / Cellular Senescence / Epidermal Growth Factor / Epithelial Cells / Gamma-Aminobutyric Acid Language: English Journal: Yonsei Medical Journal Year: 1998 Type: Article

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Full text: Available Index: WPRIM (Western Pacific) Main subject: Rats / Brain / Cell Differentiation / Cell Division / Cells, Cultured / Laminin / Cellular Senescence / Epidermal Growth Factor / Epithelial Cells / Gamma-Aminobutyric Acid Language: English Journal: Yonsei Medical Journal Year: 1998 Type: Article