TGFB1 and atrial fibrillation: Omentin-1 was found to inhibit the expression of TGF-β1 in cardiomyocytes obtained from atrial fibrillation patients, reduce the activation of cardiac fibroblasts induced by TGF-β1, and reverse the endothelial-mesenchymal transition in HUVECs induced by TGF-β1 (56).