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  • Title: Hypertrophy of pheochromocytoma cells treated with nerve growth factor and activators of adenylate cyclase.
    Author: Tischler AS, Mobtaker H, Kwan PW, Jason WJ, DeLellis RA, Wolfe HJ.
    Journal: Cell Tissue Res; 1987 Jul; 249(1):161-9. PubMed ID: 3621290.
    Abstract:
    PC12 pheochromocytoma cells treated with nerve growth factor (NGF) in combination with high concentrations of the activators of adenylate cyclase, forskolin or cholera toxin, become more neuron-like in size than cells treated with NGF or with activators of adenylate cyclase alone. Cells treated simultaneously with NGF plus forskolin or cholera toxin paradoxically show less process outgrowth than cells treated with NGF alone. Addition of forskolin or cholera toxin to cells pretreated with NGF, however, produces enlarged cells with intact processes that are indistinguishable from cultured neurons. One possible implication of these findings is that NGF might act in concert with agents that increase intracellular cyclic AMP to cause neuronal maturation during embryogenesis, and that the proper sequence of exposure to these signals is necessary for normal development. Specific activity of acetylcholinesterase is increased by NGF but is unaffected or slightly decreased by forskolin, suggesting that individual aspects of the developing neuronal phenotype are subject to different types of control.
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