Summary
Ischaemic stroke and myocardial infarction often result from the sudden rupture of
an atherosclerotic plaque. The subsequent arterial thrombosis occluding the vessel
lumen has been widely indicated as the crucial acute event causing peripheral tissue
ischaemia. A complex cross-talk between systemic and intraplaque inflammatory mediators
has been shown to regulate maturation, remodeling and final rupture of an atherosclerotic
plaque. Matrix metalloproteinases (MMPs) are proteolytic enzymes (released by several
cell subsets within atherosclerotic plaques), which favour atherogenesis and increase
plaque vulnerability. Thus, the assessment of intraplaque levels and activity of MMP
might be of pivotal relevance in the evaluation of the risk of rupture. New imaging
approaches, focused on the visualisation of inflammation in the vessel wall and plaque,
may emerge as tools for individualised risk assessment and prevention of events. In
this review, we summarize experimental findings of the currently available invasive
and noninvasive imaging techniques, used to detect the presence and activity of MMPs
in atherosclerotic plaques.
Keywords
Matrix metalloproteinase - atherosclerosis - inflammation