Abstract
Background
Matrix Gla protein (MGP) is one of the important proteins inhibiting vascular calcification (VC). Single nucleotide polymorphisms (SNPs) located in the promoter and coding regions of the MGP gene affect the transcriptional activity. In this study, we investigated the relationship between the SNPs and progression of VC in patients undergoing maintenance hemodialysis (MHD).
Methods
This was a retrospective, longitudinal cohort study of 134 MHD patients whose VC could be followed by multi-detector computed tomography (MDCT) examinations. MGP-SNPs (T-138C, rs1800802 and G-7A, rs1800801) were determined. The progression speed of VC was examined by plotting the abdominal aortic calcium volume scores.
Results
The progression speed of VC of patients with the CC genotype of T-138C was significantly slower than that of patients with the CT or TT genotype. Multiple regression analysis showed that CT/TT genotype, greater age at the beginning of MHD, male sex, high levels of calcium × phosphate, low levels of high-density lipoprotein cholesterol, high levels of low-density lipoprotein cholesterol, low levels of ferritin and non-use of angiotensin II receptor blockers were significantly associated with progression of VC.
Conclusions
The MGP-138CC genotype may be associated with slower progression of VC in MHD patients. The genotype of the MGP gene will be a genomic biomarker that is predictive of VC progression.
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Acknowledgments
The authors thank A. Sakurai, T. Sasaki, and S. Hayashi for their technical support. This study was supported in part by a Grant-in-Aid for Diabetic Nephropathy, Research from the Ministry of Health, Labour and Welfare of Japan and a grant from The Kidney Foundation, Japan (JKFB10-28 and JKF10-2).
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The authors have declared that no conflict of interest exists.
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Yoshikawa, K., Abe, H., Tominaga, T. et al. Polymorphism in the human matrix Gla protein gene is associated with the progression of vascular calcification in maintenance hemodialysis patients. Clin Exp Nephrol 17, 882–889 (2013). https://doi.org/10.1007/s10157-013-0785-9
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DOI: https://doi.org/10.1007/s10157-013-0785-9