Canine Aortic Smooth Muscle Cells: CnAOSMC

In vivo, vascular smooth muscle cells populate the arterial wall, where they regulate vascular tone, structural remodeling, and hemodynamic properties. In experimental research, CnAOSMC — alongside related mammalian models such as human primary cells and rat primary cells — can be used to investigate mechanisms relevant to vascular disease, arterial disease, and vascular smooth muscle cell function. For instance, studies using CnAOSMC have demonstrated that platelet-derived growth factor (PDGF) acts as a potent mitogen and chemotactic agent involved in intimal hyperplasia and atherosclerosis. Research has revealed significant regional differences in PDGF production within the normal canine aorta, with smooth muscle cells contributing to this variation, whereas graft smooth muscle cells often exhibit altered functional properties, including increased PDGF production that may promote intimal hyperplasia. Furthermore, these cells have been utilized to evaluate how agents like nebivolol relax vascular smooth muscle through nitric oxide- and cyclic GMP-dependent mechanisms, and to identify cDNA for the canine isoform of nitric oxide synthase (iNOS) to study allograft rejection and vascular pathology.