<p>(A) Effects of 1, 10, 100 µM cocaine in the presence or absence of gp120 IIIB (200 ng/ml) for 48 h on the survival of rat primary astrocytes using the MTT assay. (B) Effects of gp120 IIIB, heated inactivated gp120 IIIB and gp120 Bal (200 ng/ml) on the survival of rat primary astrocytes using the MTT assay. All the data are presented as mean ± SD of four individual experiments. *<i>p</i><0.05; **<i>p</i><0.01; ***p<0.001 versus control group; # p< 0.05 versus cocaine group; ∧ <i>p</i>< 0.05 versus gp120 group.</p
