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astrocytoma/scopolamine
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4 results
Characterization of the subtype of muscarinic receptor coupled to the stimulation of phosphoinositide hydrolysis in 132-1N1 human astrocytoma cells.
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Stimulation of muscarinic receptors increases phosphoinositide (PI) hydrolysis in 132-1N1 human astrocytoma cells. To evaluate the subtype of receptors which mediate PI hydrolysis in 132-1N1 cells, the effects of: a) the nonselective M1 agonist, carbachol; b) the selective M1 agonist,
Phorbol ester inhibits phosphoinositide hydrolysis and calcium mobilization in cultured astrocytoma cells.
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In cultured human 1321N1 astrocytoma cells, muscarinic receptor stimulation leads to phosphoinositide hydrolysis, formation of inositol phosphates, and mobilization of intracellular Ca2+. Treatment of these cells with 1 microM 4 beta-phorbol 12 beta-myristate 13 alpha-acetate (PMA) completely blocks
5,19-cyclo-9beta,10xi-androstane-3,17-dione promotes neurotrophic factor biosynthesis in 1321N1 human astrocytoma cells and improves passive avoidance learning impairment.
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Since neurotrophic factors are essential for neurons to form neuronal networks and maintain neuronal functions, neurotrophic factor-like substances or inducers of neurotrophic factors can be useful for the treatment of serious neuronal diseases such as Alzheimer's and Parkinson's diseases. In the
Evidence for an agonist-induced, ATP-dependent change in muscarinic receptors of intact 1321N1 cells.
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The binding of muscarinic agonists, partial agonists and antagonists to muscarinic receptors of intact 1321N1 human astrocytoma cells and of cell lysates was studied. Partial agonists and antagonists exhibited similar apparent affinities in intact cell competition binding assays with either the
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