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Updated: Jun 6, 2025

Calcification of Vascular Smooth Muscle Cells and Imaging of Aortic Calcification and Inflammation
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Matrix vesicles from osteoblasts promote atherosclerotic calcification.

Xiaoli Wang1, Jie Ren1, Fei Fang1

  • 1Institute of Biomedical Engineering, West China School of Basic Medical Sciences & Forensic Medicine, Sichuan University, Chengdu, PR China.

Matrix Biology : Journal of the International Society for Matrix Biology
|November 23, 2024
PubMed
Summary

Osteoblast-derived matrix vesicles (Ost-MVs) contribute to vascular calcification in atherosclerosis. These circulating vesicles target arterial plaques, exacerbating calcification through the Ras-Raf-ERK pathway, revealing a bone-vascular crosstalk mechanism.

Keywords:
Matrix vesiclesOsteoblastsVascular calcificationVascular smooth muscle cells

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Area of Science:

  • Biomedical Science
  • Vascular Biology
  • Bone Metabolism

Background:

  • Atherosclerotic calcification and osteoporosis often coexist, suggesting a link between bone and vascular mineralization.
  • Osteoblast-derived matrix vesicles (Ost-MVs) are key to bone mineralization and implicated in ectopic calcification.
  • The exact role and mechanisms of Ost-MVs in vascular calcification are not fully understood.

Purpose of the Study:

  • To investigate the role of osteoblast-derived matrix vesicles (Ost-MVs) in atherosclerotic calcification.
  • To elucidate the mechanisms by which Ost-MVs contribute to vascular calcification.
  • To explore the bone-vascular crosstalk in the context of atherosclerosis.

Main Methods:

  • Observation of concomitant atherosclerotic calcification and bone loss with elevated circulating Ost-MVs.
  • Demonstration of Ost-MV targeting to atherosclerotic plaque lesions.
  • Analysis of Ost-MV transport, aggregation, and uptake mechanisms involving vascular injury, collagen I, and VSMC phenotypic switching.
  • Investigation of the Ras-Raf-ERK pathway in Ost-MV and VSMC-MV-mediated calcification.

Main Results:

  • Circulating Ost-MVs were found to target atherosclerotic plaque lesions.
  • Vascular injury, collagen I remodeling, and VSMC phenotypic switching facilitate Ost-MV recruitment into the vasculature.
  • Both Ost-MVs and VSMC-derived matrix vesicles (VSMC-MVs) were shown to exacerbate calcification via the Ras-Raf-ERK pathway.

Conclusions:

  • Ost-MVs play a significant role in vascular calcification during atherosclerosis.
  • A novel mechanism involving Ost-MV-mediated vascular calcification and bone-vascular crosstalk has been identified.
  • These findings enhance the understanding of the interplay between bone and vascular health.