['Proprotein convertase subtilisin kexin type 9 (PCSK9) induces degradation of the low-density lipoprotein-receptor (LDLR). Smooth muscle cells (SMCs) in human atherosclerotic plaques and cultured SMCs express PCSK9. The present study aimed at defining the role of PCSK9 on vascular response to injury.', 'Carotid neointimal lesions were induced by positioning a non-occlusive collar in PCSK9 knock-out (PCSK9', 'In PCSK9'] Are pCSK9 knock-out mice protected from neointimal formation in response to perivascular carotid collar placement?