Western blotting was done as described previously in polyacrylamide gradient gels (8–16%; Invitrogen Corporation) run in tris glycine buffer under reduced conditions (Wang et al. 2007). The primary antibodies were smooth muscle actin (A2547; Sigma‐Aldrich, St. Louis, MO) and GAPDH (ab8245; Abcam, Cambridge, MA) The images were quantified, using NIH ImageJ software.
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