Abstract
Pulmonary fibrosis is characterized by pathological scaring of the lung. Similar to other fibrotic diseases, scar formation is driven by excessive extracellular matrix deposition by activated, proliferative, and migratory fibroblasts. Currently, the two most widely used chemotaxis and cell migration assays are the scratch assay and the transmembrane invasion assay. Here we present a gap closure assay that employs commercially available cell lines, equipment and reagents and is time efficient as well as straightforward. The protocol uses an Oris pro cell migration assay 96-well plate with a dissolvable plug in the center of each well to create a cell free area at the time of seeding. Cell repopulation of the empty zone is captured via light microscopy at different time points and quantified with free image analysis software. The clear advantages of this assay in comparison to similar protocols are the use of uncomplicated cell culture methods and the ability to image the experiment throughout.
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