Expression profiles of purinergic P1 and P2 receptors in cultured bovine aortic endothelial cells, bovine aortic smooth muscle cells, and human vascular endothelial EA.hy926 cells.

Purinergic signaling plays an important role in vascular biology by vascular tone, inflammation, and remodeling through extracellular nucleotides that activate the P1 and P2 receptors. However, the expression patterns of these receptors in commonly used vascular cell models are not well characterized. In this study, we examined purinergic receptor expression in bovine aortic endothelial cells (BAECs), bovine aortic smooth muscle cells (BASMCs), and human vascular endothelial EA.hy926 cells. In BAECs, ADORA2A, ADORA2B, P2X4R, P2X7R, P2Y1R, P2Y2R, P2Y4R, P2Y6R, and P2Y11R were expressed, whereas the other purinergic receptors were not. BASMCs expressed ADORA2A, ADORA2B, P2X4R, P2X5R, P2Y1R, P2Y2R, P2Y6R, and P2Y11R. EA.hy926 cells expressed ADORA2A, ADORA2B, P2X4R, P2Y2R, P2Y6R, and P2Y11R. These results showed distinct expression profiles of purinergic receptors across different cell types. BAECs exhibited a purinergic receptor expression pattern similar to that of primary human vascular endothelial cells, suggesting that BAECs are a suitable model for studying purinergic signaling in vascular endothelial cells.