Calciprotein Particles Link Disturbed Mineral Homeostasis with Cardiovascular Disease by Causing Endothelial...

Area of Science:

• Cardiovascular Science
• Mineral Metabolism
• Vascular Biology

Background:

• High serum calcium/phosphate levels are linked to cardiovascular events, but the underlying mechanisms remain unclear.
• Calciprotein particles (CPPs) are nanoscale structures formed in blood supersaturated with calcium and phosphate.

Purpose of the Study:

• To investigate the role of calciprotein particles (CPPs) in the development of cardiovascular disease.
• To elucidate the mechanistic link between altered mineral homeostasis and vascular pathology.

Main Methods:

• Serum analysis of patients with coronary artery disease or cerebrovascular disease for CPP formation propensity, ionised calcium, and albumin levels.
• Intravenous administration of CPPs to Wistar rats to assess aortic changes (intimal hyperplasia, inflammation).
• In vitro studies on human arterial endothelial cells exposed to CPPs to evaluate cell death, cytokine release, leukocyte adhesion, and endothelial-to-mesenchymal transition.

Main Results:

• Patients with cardiovascular disease showed increased CPP formation, elevated ionised calcium, and reduced albumin, indicating impaired calcium-binding capacity.
• CPP administration in rats induced intimal hyperplasia and vascular inflammation in aortas, even without other risk factors.
• In vitro, CPPs caused endothelial cell death, pro-inflammatory cytokine release, leukocyte adhesion, and endothelial-to-mesenchymal transition.

Conclusions:

• Calciprotein particles (CPPs) are formed due to altered mineral homeostasis and directly contribute to cardiovascular disease.
• CPPs induce endothelial dysfunction and vascular inflammation, serving as a key mechanistic link between mineral imbalance and atherosclerosis.
• These findings highlight CPPs as a potential therapeutic target for cardiovascular disease prevention and treatment.