ACTA1 and endometriosis: We therefore compared the expression of fibrotic proteins in the cells mentioned above and found that the expression of collagen I, α-SMA, fibronectin, and CTGF in ectopic endometrial MSCs was robustly intensified compared with eutopic endometrial MSCs from the same patients and normal endometrial MSCs from women without endometriosis (Figure 4).