Fig. 3.

Effects of NGF and REX on zinc-induced neuronal death. A, Bars denote LDH release in cortical cultures (mean + SEM; n = 4), 18 hr after 15 min exposure to 300 μm zinc without (Zinc) or with addition of REX (1:400) (+REX). B,LDH release (n = 4–8) in cortical cultures, 18 hr after 15 min exposure to 300 μm zinc in the presence of indicated concentrations (nanograms per milliliter) of NGF (left), and after 24 hr exposure to 25 or 30 μm zinc without (CTRL) or with 100 ng/ml NGF (+NGF) (right).Asterisks denote difference from zinc (p < 0.05; two-tailed t test with Bonferroni correction for multiple comparisons).