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  11. Size-dependent Interactions Between Calciprotein Particles And Vascular Endothelium

Size-dependent interactions between calciprotein particles and vascular endothelium

Zeping Zhang1,2, Xinyue Wang1,2, Caihao Huang1,3

  • 1Institute of Metal Research, Chinese Academy of Sciences, Shenyang, Liaoning 110016, China.

Materials Today. Bio
|March 12, 2025

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View abstract on PubMed

Summary
This summary is machine-generated.

Small calciprotein particles (CPPs) disrupt the vascular endothelial barrier by widening gaps between cells, while larger CPPs are internalized. This size-dependent interaction impacts vascular health and nanoparticle design.

Area of Science:

  • Nanomedicine and Vascular Biology
  • Biomaterials Science
  • Cellular and Molecular Physiology

Background:

  • Mechanisms of nanoparticle-endothelial cell interactions are poorly understood, hindering optimal nanoparticle design for clinical use.
  • Vascular endothelial barrier integrity is critical for systemic health, and its disruption can lead to pathological conditions like medial calcification.
  • Calciprotein particles (CPPs) are implicated in vascular calcification, but their specific interactions with endothelial cells require elucidation.

Purpose of the Study:

  • To investigate the size-dependent interactions between calciprotein particles (CPPs) and endothelial cells (ECs).
  • To elucidate the impact of CPP size on endothelial barrier function and integrity.
  • To inform the design of nanoparticles for therapeutic applications by understanding their vascular interactions.

Main Methods:

  • Synthesized small (S-CPP1, <50 nm) and large (L-CPP1, 50-100 nm) calciprotein particles (CPPs) with distinct morphologies.
  • Utilized a rat model of chronic kidney disease (CKD) induced by 5/6 nephrectomy.
  • Assessed endothelial permeability and cell morphology using immunofluorescence microscopy and quantified intercellular gap changes.

Main Results:

  • Small CPP1 (S-CPP1) significantly increased endothelial permeability at tested concentrations, disrupting the endothelial barrier integrity.
  • S-CPP1 induced irregular endothelial cell morphology and widened intercellular gaps, suggesting disruption of VE-cadherin junctions.
  • Large CPP1 (L-CPP1) was internalized by endothelial cells via endocytosis, showing size-specific uptake mechanisms.

Conclusions:

  • The interaction between CPPs and the vascular endothelium is critically dependent on particle size.
  • Small CPPs pose a greater risk to endothelial barrier integrity, potentially contributing to medial calcification.
  • Understanding these size-dependent interactions is crucial for developing safer and more effective nanoparticle-based therapies.
Keywords:
Biomimetic synthesisCalciprotein nanoparticlesChronic kidney diseaseEndothelium

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