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- W2071702110 abstract "Human NTera-2/clone D1 teratocarcinoma cells are induced by retinoic acid (RA) to differentiate into postmitotic cells with morphological and biochemical characteristics of embryonic human neurones. Currently only limited information concerning peptide-contents and neurotransmitter pools of these cells is available. Zeller and Strauss [Int. J. Dev. Neurosci. 1995;13(5):437] described an increase in choline acetyltransferase (ChAT) activity in RA-treated, but not in untreated NTera-2 cells, suggesting the induction of a cholinergic phenotype during treatment with RA. In the present study we investigated the effect of RA-differentiation on the amount of the neurotransmitters acetylcholine (ACh), and dopamine in NTera-2 in order to specify the transmitter phenotype induced by RA-differentiation. We found that a 4-week treatment of NTera-2 cells with 10 microM RA markedly increased the ACh-content of these cells, while dopamine levels were unchanged. Depolarisation with potassium (60 mM) enhanced ACh-outflow in the differentiated cells in a Ca(++) dependent way. Also neuropeptides like substance P and NPY were detectable in the undifferentiated NTera-2 cells, while vasointestinal peptide (VIP) could not be found in either precursor or RA-differentiated cells. Differentiation was accompanied by a marked reduction of neutral endopeptidase enzyme activity and aminopeptidase activity. From these observations it was concluded that RA induces a cholinergic neurochemical differentiation of this human teratocarcinoma cell line, and that these cells might provide a model system to investigate cholinergic properties of human origin." @default.
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- W2071702110 date "2000-12-01" @default.
- W2071702110 modified "2023-09-27" @default.
- W2071702110 title "Retinoic acid treatment enhances the acetylcholine contents in the human teratocarcinoma cell line NTera-2" @default.
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- W2071702110 doi "https://doi.org/10.1016/s0167-0115(00)00201-9" @default.
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