Fig. 1
From: Nerve growth factor: role in growth, differentiation and controlling cancer cell development
Photographic illustration of untreated (baseline, left panels) and treated (NGF exposure, right panels) cultured cells. As shown by phase contrast acquisition, exposure to 20 ng/ml NGF for seven consecutive days promoted differentiation and neuritis outgrowth (right panels) rather than cell proliferation of sympathetic (b), tumor PC-12 (d) and beta pancreatic (f) cell lines, as compared to untreated ones (left panels). Magnifications: x400. a-d, phase contrast; e-f, light microscopy