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Vascular Calcification: In Vitro Evidence for the Role of Inorganic Phosphate

Giachelli, Cecilia M.·2003·Journal of the American Society of Nephrology

Abstract

Uremic patients are prone to widespread ectopic extraskeletal calcification resulting from an imbalance of systemic inorganic phosphate (Pi). There can be serious consequences of this process, particularly when it results in the calcification of the vasculature. A recent study examined the response of cultured human aortic smooth muscle cells to varying levels of extracellular Pi. Cells that were exposed to Pi levels similar to those seen in uremic patients (>1.4 mmol/L) showed dose-dependent increases in cell culture calcium deposition. The results of this study also defined the role of elevated phosphate in transforming the vascular phenotype of these cells to an osteogenic phenotype, such that a predisposition for calcification was created. Pi-induced changes included increased expression of the osteogenic markers osteocalcin and core-binding factor-1 genes, the latter of which is considered a "master gene" critical for osteoblast differentiation. These changes occur early after exposure to high phosphate levels and seem to be mediated by a sodium-dependent phosphate co-transporter, Pit-1 (Glvr-1). Calcification of vascular cells also seems to occur in the absence of a mineral imbalance but in the presence of platelet-derived growth factor, a potent atherogenic factor. Taken together, these data suggest that calcification of vascular cells can occur early in a phosphate-rich environment similar to that seen in patients with renal failure and in a platelet-derived growth factor-rich atherosclerotic region under normal phosphorus conditions. From a clinical viewpoint, it seems that early control or prevention of hyperphosphatemia may reduce coronary calcification and its associated morbidity and mortality for patients on dialysis.

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Metadata

Authors
Giachelli, C. M.
Venue
Journal of the American Society of Nephrology
Published
2003-09
Volume
14
Issue
suppl_4
Pages
S300-S304
ISSN
1046-6673 (ISSN-L)
OpenAlex
W2160745333
Cited by
284
References
32
FWCI
8.66
Type
journal article
Language
en
Open access
closed

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CoChat. (2026). Citation check: Vascular Calcification: In Vitro Evidence for the Role of Inorganic Phosphate. https://app.cochat.ai/papers/10.1097/01.asn.0000081663.52165.66
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Giachelli, C. M. (2003). Vascular Calcification: In Vitro Evidence for the Role of Inorganic Phosphate. Journal of the American Society of Nephrology. https://doi.org/10.1097/01.asn.0000081663.52165.66

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Contains information from the Semantic Scholar Academic Graph Datasets, made available under the ODC Attribution License (ODC-BY 1.0).

Semantic Scholar’s data is described in: Kinney, R., et al. (2023). The Semantic Scholar Open Data Platform. arXiv:2301.10140.