Figure 1. Immunohistochemical characterization of primary trabecular meshwork cell cultures. Immunohistochemical assays on the TM cells were positive for fibronectin (A), laminin (B), vimentin (C), neuronal specific enolase (D) and negative for the endothelial cell marker, factor VIII (E), which indicated that the primary cultures obtained from normal and POAG individuals were indeed TM cells.