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We have previously reported that inhibition of protein kinase C induces differentiation of neuroblastoma cells in culture. It is shown now that actinomycin D, a well known inhibitor of DNA synthesis, reduces selectively the content of protein kinase C and induces neuritogenesis in Neuro 2a cells in culture.
It is shown that 1-(5-isoquinolinylsulfonyl)-2-methylpiperazine (H7), a specific inhibitor of protein kinase C, induces neuritogenesis in neuro 2a cells. The percentage of differentiated cells was 9%, 20%, 59% and 85% at 0, 17, 85 and 500 μM H7, respectively. The number of neurites/cell increased 2-, 8- and 14-fold over the controls for 17, 85 and 500 μM H7, respectively. These results indicate that...
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