Fig. 10.

Inhibition of long-term potentiation of TH expression by L-type calcium channel blockade. Dissociated E16.5 PG neurons were grown for a total of 15 d as indicated. Eachbar shows the mean percentage (± SEM) of neurons exhibiting TH immunoreactivity at the end of the culture period.Black bars represent the percentage of TH-positive neurons in cultures exposed to 1 μm nifedipine during the initial 3 d of culture only. Comparisons were made using ANOVA followed by Scheffé’s test; *p< 0.05; ***p < 0.001.