p53 negatively regulates the osteogenic differentiation of vascular smooth muscle cells in mice with chronic kidney disease.

Abstract:

AIM:To investigate the osteogenic differentiation of vascular smooth muscle cells (VSMCs) in mice with chronic kidney disease (CKD) and to evaluate the effects of p53 on the osteogenic differentiation of the VSMCs. METHODS:Experimental models of CKD-associated vascular calcification generated by five-sixth (5/6) nephrectomy (Nx) and a high-phosphate (HP) diet were used in p53+/+ and p53-/- mice. Following 5/6 Nx, aortic calcification, markers of osteogenic differentiation, VSMCs and p53 protein in aortic tissues were studied. RESULTS:Aortic calcification was observed after eight weeks following 5/6 Nx in mice of both genotypes, and expression of the markers of osteogenic differentiation in the VSMCs was increased. These changes were continuously observed up to 12 weeks after 57/6 Nx, and particularly after 5/6 Nx + HP. Compared with p53+/+ mice, aortic calcification in p53-/- mice was more severe (p < 0.001). Expression of the markers of osteogenic differentiation was noticeably increased (p < 0.001), while expression of the marker of VSMCs had decreased (p < 0.001). Statistical analysis demonstrated that the markers of osteogenic differentiation were negatively correlated with p53, and the marker of VSMCs was positively correlated with p53 (p < 0.001). CONCLUSION:p53 has the potential to negatively regulate the osteogenic differentiation of VSMCs in CKD mice.

journal_name

Cardiovasc J Afr

authors

Li KL,Chen J,Li ZH,Zhao L,He YN

doi

10.5830/CVJA-2011-069

subject

Has Abstract

pub_date

2012-07-12 00:00:00

pages

e1-9

issue

6

eissn

1995-1892

issn

1680-0745

journal_volume

23

pub_type

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