Adaptation of a wound healing assay to a 384 well plate format. (A) Images from a time-lapse sequence of BS-C-1 cells migrating on a coverslip to heal a wound. Bar 20 μm. (B) Images of wounds 0, 3, 7, 12, and 24 hrs after wounding show characteristic protrusion of lamella at 3 hrs, migration by 7 hrs, and eventual healing of the wound at 24 hrs. Cells are stained for filamentous actin. Bar 100 μm. (C) Schematic of the protocol used for screening. The 96 well pin array (shown) produces wounds with consistent shape and placement within each well. Image of 25 wells stained for filamentous actin 7 hrs after wounding. Bar 500 μm. (D) The primary phenotypes observed with an automated microscope in a small molecule screen (4× objective, 7 hr healing). Wells often showed a combination of these phenotypes. Cells are stained for filamentous actin and DNA. The dotted yellow line notes the approximate edge of the initial wound (based on the high density of nuclei). Bar 100 μm.