Figure 1From: Gonadal steroids differentially modulate neurotoxicity of HIV and cocaine: testosterone and ICI 182,780 sensitive mechanismTrue and false color photomicrographs of human neurons (A-C). Control culture after trypan blue exclusion assay in true color (A) and false color (B). Cultures exposed to HIV proteins 40 nM Tat plus 32.5 pM gp120 and 1.6 μM cocaine show synergistic toxicity trypan blue exclusion assay in true color (C) and false color (D).Back to article page