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Updated: Jan 26, 2026
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Calcification of Vascular Smooth Muscle Cells and Imaging of Aortic Calcification and Inflammation
Published on: May 31, 2016
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Differing calcification processes in cultured vascular smooth muscle cells and osteoblasts
Jessal J Patel1, Lucie E Bourne2, Bethan K Davies2
1Department of Comparative Biomedical Sciences, Royal Veterinary College, London, UK; School of Life & Medical Sciences, University of Hertfordshire, Hatfield, UK.
Experimental Cell Research
|April 21, 2019
Summary
Arterial medial calcification (AMC) in vascular smooth muscle cells (VSMCs) differs from bone formation. Calcifying VSMCs show reduced viability and do not rely on TNAP, unlike osteoblasts forming bone.
Area of Science:
- Vascular Biology
- Mineralization
- Cell Biology
Background:
- Arterial medial calcification (AMC) involves mineral deposition in arteries.
- AMC is linked to vascular smooth muscle cell (VSMC) transdifferentiation into osteoblast-like cells.
- Direct comparison of AMC and bone formation models is crucial.
Purpose of the Study:
- To compare in vitro models of arterial medial calcification (AMC) and bone formation.
- To identify key differences between calcifying VSMCs and osteoblasts.
- To elucidate the mechanisms underlying VSMC calcification.
Main Methods:
- Primary mouse VSMCs and calvarial osteoblasts were used for in vitro studies.
- Mineralization, collagen deposition, cell viability, apoptosis, and alkaline phosphatase (TNAP) activity were assessed.
- Gene expression of osteoblast-related markers was analyzed.
Main Results:
- Osteoblasts formed collagenous bone nodules, while VSMCs formed non-collagenous calcifications.
- Calcifying VSMCs exhibited reduced viability and increased apoptosis, unlike osteoblasts.
- VSMC calcification was TNAP-independent and associated with lower expression of osteoblast markers.
Conclusions:
- Calcifying VSMCs exhibit limited osteoblast-like features but distinct characteristics.
- VSMC calcification does not involve collagen deposition or TNAP dependence.
- AMC negatively impacts VSMC viability, differentiating it from bone formation.
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