Figure 3

Fibronectin time course. An increase in the rate of IL-8 secretion was observed in wells coated with 1 μg ml−1 fibronectin before any rise in secretion in BSA-coated wells (A). Interleukin-8 levels continued to rise at the same rate after 72 h in fibronectin- and BSA-coated wells. Cell numbers rose only in fibronectin-coated wells and slowed after 72 h (B). However, when results were expressed as IL-8 per cell (C), it was apparent that at 96 and 120 h secretion was decreased in fibronectin-coated wells.