Desphospho-uncarboxylated matrix Gla protein is a novel circulating biomarker predicting deterioration of renal function in the general population

Fang Fei Wei, Sander Trenson, Lutgarde Thijs, Qi Fang Huang, Zhen Yu Zhang, Wen Yi Yang, Paula Moliterno, Karel Allegaert, José Boggia, Stefan Janssens, Peter Verhamme, Cees Vermeer*, Jan A. Staessen

*Corresponding author for this work

Research output: Contribution to journalArticleAcademicpeer-review

33 Citations (Scopus)
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Abstract

Background:

Recent studies showing an inverse association between estimated glomerular filtration rate (eGFR), a microvascular trait, and inactive desphospho-uncarboxylated matrix Gla protein (dp-ucMGP) support the hypothesis that after vitamin K'dependent activation, matrix Gla protein (MGP) is renoprotective, but these were limited by their cross-sectional design. 

Methods:

In 1009 randomly recruited Flemish (50.6% women), we assessed the association between eGFR and plasma dpucMGP, using multivariable-adjusted analyses. 

Results:

From baseline to follow-up 8.9 years later (median), dp-ucMGP increased by 23.0% whereas eGFR decreased by 4.05 mL/min/1.73 m2 (P< 0.001). In 938 participants with baseline eGFR 60 mL/min/1.73 m2, the incidence of eGFR<60 mL/min/1.73 m2 at follow-up was 8.0% versus 4.1% in the top versus the bottom halve of baseline dp-ucMGP. For a 5-fold higher plasma dp-ucMGP at baseline, eGFR at follow-up decreased by 3.15 mL/min/1.73 m2 [95% confidence interval (CI) 1.26-5.05; P = 0.001]. The hazard ratio expressing the risk of progression to eGFR<60 mL/min/1.73 m2 was 3.49 (95% CI 1.45-8.40; P = 0.005). The hazard ratio relating the presence of microalbuminuria at follow-up to baseline dp-ucMGP was 4.70 (95% CI 1.57-14.1; P = 0.006). 

Conclusions:

In conclusion, circulating inactive dp-ucMGP, a biomarker of poor vitamin K status, predicts renal dysfunction. Possible underlying mechanisms include protection by activated MGP against calcification and inhibition of the bone morphogenetic protein-signalling pathway.

Original languageEnglish
Pages (from-to)1122-1128
Number of pages7
JournalNephrology Dialysis Transplantation
Volume33
Issue number7
DOIs
Publication statusPublished - Jul 2018
Externally publishedYes

Bibliographical note

Funding Information:
The study was supported by the grants from the European Union (HEALTH-FP7-278249-EUMASCARA, HEALTH-F7-305507 HOMAGE) and the European Research Council (Advanced Researcher Grant 2011-294713-EPLORE and Proof-of-Concept Grant 713601-uPROPHET) and the Fonds voor Wetenschappelijk Onderzoek Vlaanderen, Ministry of the Flemish Community, Brussels, Belgium (G.0881.13, G.088013, and 11Z0916N) currently supports the Studies Coordinating Centre in Leuven.

Publisher Copyright:
© 2018 The Author(s).

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