From:  Endothelial dysfunction and vascular stiffness: molecular drivers of cardiovascular aging

 Structural and cellular drivers of vascular stiffness.

DriverMolecular/cellular basisEffect on arterial wallReferences
Elastin degradation↑ MMP activity, mechanical fatigueLoss of elasticity, ↑ stiffness[19, 20, 24, 25]
Collagen accumulation↑ Synthesis, AGE-mediated cross-linkingIncreased rigidity, ↓ compliance[19, 20, 2426]
VSMC phenotypic switchContractile → synthetic phenotype↑ ECM production, fibrosis[21, 22, 27, 30]
Vascular calcification↑ Phosphate, osteogenic VSMC differentiationMedial calcification, ↑ pulse wave velocity[21, 22, 25, 27]

AGE: advanced glycation end product; ECM: extracellular matrix; MMP: matrix metalloproteinase; VSMC: vascular smooth muscle cell.