Calciprotein Particles Cause Physiologically Significant Pro-Inflammatory Response in Endothelial Cells and Systemic...

Area of Science:

• Biochemistry
• Cell Biology
• Immunology

Background:

• Calciprotein particles (CPPs) buffer calcium and phosphate but can cause endothelial dysfunction.
• Understanding CPPs' impact on endothelial cells (ECs) is crucial for managing vascular health.

Purpose of the Study:

• To investigate the functional consequences of CPP internalization by ECs.
• To identify molecular mechanisms underlying CPP-induced inflammation and endothelial dysfunction.

Main Methods:

• Label-free proteomic profiling of CPP-treated ECs.
• In vitro incubation of ECs with conditioned media.
• In vivo studies using Wistar rats with CPP administration.

Main Results:

• CPP internalization disturbed mitochondrial and lysosomal function in ECs, causing oxidative stress and calcium elevation.
• CPP-treated ECs induced pro-inflammatory activation, upregulating VCAM1, ICAM1, and releasing IL-6, IL-8, and MCP-1/CCL2.
• Monocytes were the primary cells internalizing CPPs, leading to chemokine production and systemic inflammation in vivo.

Conclusions:

• CPPs induce significant cellular dysfunction and pro-inflammatory responses in endothelial cells.
• Monocyte-driven inflammation and endothelial dysfunction are key consequences of CPP exposure.
• Targeting CPPs may offer a therapeutic strategy for inflammatory vascular conditions.